/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-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:11:10,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:11:10,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:11:10,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 05:11:10,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 05:11:10,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 05:11:10,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 05:11:10,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 05:11:10,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 05:11:10,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 05:11:10,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 05:11:10,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 05:11:10,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 05:11:10,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 05:11:10,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 05:11:10,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 05:11:10,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 05:11:10,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 05:11:10,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 05:11:10,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 05:11:10,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 05:11:10,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 05:11:10,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 05:11:10,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 05:11:10,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 05:11:10,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 05:11:10,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 05:11:10,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 05:11:10,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 05:11:10,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 05:11:10,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 05:11:10,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 05:11:10,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 05:11:10,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:11:10,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:11:10,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:11:10,135 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 05:11:10,154 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:11:10,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:11:10,155 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:11:10,155 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:11:10,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:11:10,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:11:10,156 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:11:10,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:11:10,157 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:11:10,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:11:10,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:11:10,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:11:10,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:11:10,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:11:10,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:11:10,158 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:11:10,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:11:10,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:11:10,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:11:10,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:11:10,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:11:10,159 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:11:10,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:11:10,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:11:10,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:11:10,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:11:10,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:11:10,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:11:10,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:11:10,160 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:11:10,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:11:10,161 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:11:10,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:11:10,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:11:10,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:11:10,472 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:11:10,476 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:11:10,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl [2021-06-05 05:11:10,478 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl' [2021-06-05 05:11:10,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:11:10,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:11:10,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:11:10,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:11:10,512 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:11:10,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:11:10" (1/1) ... [2021-06-05 05:11:10,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:11:10" (1/1) ... [2021-06-05 05:11:10,539 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:11:10,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:11:10,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:11:10,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:11:10,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:11:10" (1/1) ... [2021-06-05 05:11:10,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:11:10" (1/1) ... [2021-06-05 05:11:10,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:11:10" (1/1) ... [2021-06-05 05:11:10,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:11:10" (1/1) ... [2021-06-05 05:11:10,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:11:10" (1/1) ... [2021-06-05 05:11:10,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:11:10" (1/1) ... [2021-06-05 05:11:10,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:11:10" (1/1) ... [2021-06-05 05:11:10,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:11:10,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:11:10,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:11:10,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:11:10,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:11:10" (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 05:11:10,630 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:11:10,630 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:11:10,631 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:11:10,631 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:11:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:11:10,631 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:11:10,631 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:11:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:11:10,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:11:10,632 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:11:10,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:11:10,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:11:10,633 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 05:11:10,633 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 05:11:10,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 05:11:10,634 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-05 05:11:10,634 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-05 05:11:10,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-05 05:11:10,635 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-06-05 05:11:10,635 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-06-05 05:11:10,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-06-05 05:11:10,636 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 05:11:10,925 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:11:10,925 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-05 05:11:10,926 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 05:11:10,927 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 05:11:10,927 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-06-05 05:11:10,927 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-06-05 05:11:10,928 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:11:10 BoogieIcfgContainer [2021-06-05 05:11:10,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:11:10,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:11:10,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:11:10,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:11:10,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:11:10" (1/2) ... [2021-06-05 05:11:10,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1668bff and model type parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:11:10, skipping insertion in model container [2021-06-05 05:11:10,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:11:10" (2/2) ... [2021-06-05 05:11:10,934 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-2.wvr.bpl [2021-06-05 05:11:10,946 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:11:10,946 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:11:10,946 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:11:10,947 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:11:11,100 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-06-05 05:11:11,118 INFO L255 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-06-05 05:11:11,149 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:11:11,149 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:11:11,149 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:11:11,150 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:11:11,150 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:11:11,150 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:11:11,150 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:11:11,150 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:11:11,162 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-06-05 05:11:11,209 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:11:11,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:11,234 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] [2021-06-05 05:11:11,235 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:11,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1598114992, now seen corresponding path program 1 times [2021-06-05 05:11:11,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:11,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120979506] [2021-06-05 05:11:11,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:11,513 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 05:11:11,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:11,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120979506] [2021-06-05 05:11:11,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120979506] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:11:11,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:11:11,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:11:11,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192589503] [2021-06-05 05:11:11,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:11:11,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:11,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:11:11,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:11:11,532 INFO L87 Difference]: Start difference. First operand has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:11,669 INFO L93 Difference]: Finished difference Result 893 states and 3368 transitions. [2021-06-05 05:11:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:11:11,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:11:11,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:11,697 INFO L225 Difference]: With dead ends: 893 [2021-06-05 05:11:11,698 INFO L226 Difference]: Without dead ends: 874 [2021-06-05 05:11:11,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:11:11,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-06-05 05:11:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 598. [2021-06-05 05:11:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.809045226130653) internal successors, (2274), 597 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 2274 transitions. [2021-06-05 05:11:11,789 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 2274 transitions. Word has length 25 [2021-06-05 05:11:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:11,790 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 2274 transitions. [2021-06-05 05:11:11,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,791 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 2274 transitions. [2021-06-05 05:11:11,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:11:11,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:11,793 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] [2021-06-05 05:11:11,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:11:11,794 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:11,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:11,795 INFO L82 PathProgramCache]: Analyzing trace with hash -841782840, now seen corresponding path program 2 times [2021-06-05 05:11:11,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:11,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875807446] [2021-06-05 05:11:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:11,866 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 05:11:11,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:11,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875807446] [2021-06-05 05:11:11,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875807446] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:11:11,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:11:11,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:11:11,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703683433] [2021-06-05 05:11:11,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:11:11,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:11,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:11:11,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:11:11,870 INFO L87 Difference]: Start difference. First operand 598 states and 2274 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:11,935 INFO L93 Difference]: Finished difference Result 872 states and 3319 transitions. [2021-06-05 05:11:11,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:11:11,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:11:11,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:11,942 INFO L225 Difference]: With dead ends: 872 [2021-06-05 05:11:11,943 INFO L226 Difference]: Without dead ends: 841 [2021-06-05 05:11:11,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:11:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-05 05:11:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 596. [2021-06-05 05:11:11,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.7663865546218487) internal successors, (2241), 595 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 2241 transitions. [2021-06-05 05:11:11,967 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 2241 transitions. Word has length 25 [2021-06-05 05:11:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:11,968 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 2241 transitions. [2021-06-05 05:11:11,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 2241 transitions. [2021-06-05 05:11:11,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:11:11,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:11,970 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] [2021-06-05 05:11:11,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:11:11,970 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:11,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:11,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1312476017, now seen corresponding path program 1 times [2021-06-05 05:11:11,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:11,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310292653] [2021-06-05 05:11:11,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:12,028 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 05:11:12,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:12,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310292653] [2021-06-05 05:11:12,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310292653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:12,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703351523] [2021-06-05 05:11:12,029 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 05:11:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:12,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:11:12,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:12,271 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 05:11:12,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703351523] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:11:12,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:11:12,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-06-05 05:11:12,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928044238] [2021-06-05 05:11:12,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:11:12,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:12,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:11:12,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:11:12,274 INFO L87 Difference]: Start difference. First operand 596 states and 2241 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:12,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:12,321 INFO L93 Difference]: Finished difference Result 867 states and 3197 transitions. [2021-06-05 05:11:12,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:11:12,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:11:12,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:12,327 INFO L225 Difference]: With dead ends: 867 [2021-06-05 05:11:12,327 INFO L226 Difference]: Without dead ends: 836 [2021-06-05 05:11:12,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:11:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-06-05 05:11:12,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 734. [2021-06-05 05:11:12,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.8663028649386084) internal successors, (2834), 733 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:12,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2834 transitions. [2021-06-05 05:11:12,360 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2834 transitions. Word has length 27 [2021-06-05 05:11:12,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:12,361 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2834 transitions. [2021-06-05 05:11:12,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:12,361 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2834 transitions. [2021-06-05 05:11:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:11:12,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:12,363 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] [2021-06-05 05:11:12,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 05:11:12,577 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:12,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:12,577 INFO L82 PathProgramCache]: Analyzing trace with hash 731220239, now seen corresponding path program 2 times [2021-06-05 05:11:12,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:12,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303449469] [2021-06-05 05:11:12,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:12,648 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 05:11:12,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:12,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303449469] [2021-06-05 05:11:12,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303449469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:12,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008244687] [2021-06-05 05:11:12,649 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 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 05:11:12,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:12,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:12,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:11:12,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:12,808 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 05:11:12,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008244687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:12,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:12,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-05 05:11:12,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628570349] [2021-06-05 05:11:12,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:11:12,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:12,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:11:12,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:11:12,810 INFO L87 Difference]: Start difference. First operand 734 states and 2834 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:12,933 INFO L93 Difference]: Finished difference Result 1660 states and 6252 transitions. [2021-06-05 05:11:12,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:11:12,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:11:12,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:12,944 INFO L225 Difference]: With dead ends: 1660 [2021-06-05 05:11:12,944 INFO L226 Difference]: Without dead ends: 1532 [2021-06-05 05:11:12,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:11:12,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-06-05 05:11:12,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1029. [2021-06-05 05:11:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 4.135214007782102) internal successors, (4251), 1028 states have internal predecessors, (4251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:12,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 4251 transitions. [2021-06-05 05:11:12,982 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 4251 transitions. Word has length 27 [2021-06-05 05:11:12,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:12,983 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 4251 transitions. [2021-06-05 05:11:12,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:12,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 4251 transitions. [2021-06-05 05:11:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:11:12,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:12,986 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] [2021-06-05 05:11:13,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:13,210 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:13,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:13,211 INFO L82 PathProgramCache]: Analyzing trace with hash -700559147, now seen corresponding path program 3 times [2021-06-05 05:11:13,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:13,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140421038] [2021-06-05 05:11:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:13,253 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 05:11:13,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:13,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140421038] [2021-06-05 05:11:13,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140421038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:13,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589952385] [2021-06-05 05:11:13,254 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 05:11:13,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:11:13,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:13,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:11:13,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:13,416 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 05:11:13,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589952385] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:11:13,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:11:13,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-06-05 05:11:13,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415161960] [2021-06-05 05:11:13,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:11:13,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:13,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:11:13,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:11:13,419 INFO L87 Difference]: Start difference. First operand 1029 states and 4251 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:13,469 INFO L93 Difference]: Finished difference Result 1331 states and 5140 transitions. [2021-06-05 05:11:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:11:13,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:11:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:13,478 INFO L225 Difference]: With dead ends: 1331 [2021-06-05 05:11:13,478 INFO L226 Difference]: Without dead ends: 1250 [2021-06-05 05:11:13,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:11:13,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-06-05 05:11:13,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 954. [2021-06-05 05:11:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 4.074501573976915) internal successors, (3883), 953 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:13,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3883 transitions. [2021-06-05 05:11:13,513 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3883 transitions. Word has length 27 [2021-06-05 05:11:13,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:13,514 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3883 transitions. [2021-06-05 05:11:13,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3883 transitions. [2021-06-05 05:11:13,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:11:13,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:13,517 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] [2021-06-05 05:11:13,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:13,740 INFO L430 AbstractCegarLoop]: === Iteration 6 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:13,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:13,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1769205167, now seen corresponding path program 1 times [2021-06-05 05:11:13,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:13,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122966638] [2021-06-05 05:11:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:13,780 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 05:11:13,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:13,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122966638] [2021-06-05 05:11:13,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122966638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:13,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147172297] [2021-06-05 05:11:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:11:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:13,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:11:13,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:13,978 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 05:11:13,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147172297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:13,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:13,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-06-05 05:11:13,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711181243] [2021-06-05 05:11:13,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:11:13,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:13,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:11:13,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:11:13,980 INFO L87 Difference]: Start difference. First operand 954 states and 3883 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:14,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:14,087 INFO L93 Difference]: Finished difference Result 1888 states and 7508 transitions. [2021-06-05 05:11:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:11:14,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:11:14,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:14,099 INFO L225 Difference]: With dead ends: 1888 [2021-06-05 05:11:14,099 INFO L226 Difference]: Without dead ends: 1828 [2021-06-05 05:11:14,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:11:14,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-06-05 05:11:14,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1443. [2021-06-05 05:11:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1442 states have (on average 4.125520110957004) internal successors, (5949), 1442 states have internal predecessors, (5949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:14,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 5949 transitions. [2021-06-05 05:11:14,147 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 5949 transitions. Word has length 27 [2021-06-05 05:11:14,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:14,148 INFO L482 AbstractCegarLoop]: Abstraction has 1443 states and 5949 transitions. [2021-06-05 05:11:14,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:14,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 5949 transitions. [2021-06-05 05:11:14,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:11:14,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:14,154 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] [2021-06-05 05:11:14,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:14,372 INFO L430 AbstractCegarLoop]: === Iteration 7 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:14,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:14,373 INFO L82 PathProgramCache]: Analyzing trace with hash 55195285, now seen corresponding path program 2 times [2021-06-05 05:11:14,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:14,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319698970] [2021-06-05 05:11:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:14,399 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 05:11:14,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:14,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319698970] [2021-06-05 05:11:14,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319698970] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:11:14,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:11:14,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:11:14,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782376533] [2021-06-05 05:11:14,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:11:14,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:14,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:11:14,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:11:14,401 INFO L87 Difference]: Start difference. First operand 1443 states and 5949 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:14,433 INFO L93 Difference]: Finished difference Result 1479 states and 6007 transitions. [2021-06-05 05:11:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:11:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:11:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:14,442 INFO L225 Difference]: With dead ends: 1479 [2021-06-05 05:11:14,442 INFO L226 Difference]: Without dead ends: 1437 [2021-06-05 05:11:14,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:11:14,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-06-05 05:11:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1422. [2021-06-05 05:11:14,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 4.130190007037298) internal successors, (5869), 1421 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:14,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 5869 transitions. [2021-06-05 05:11:14,479 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 5869 transitions. Word has length 27 [2021-06-05 05:11:14,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:14,479 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 5869 transitions. [2021-06-05 05:11:14,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:14,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 5869 transitions. [2021-06-05 05:11:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:14,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:14,484 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] [2021-06-05 05:11:14,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 05:11:14,484 INFO L430 AbstractCegarLoop]: === Iteration 8 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:14,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1098192368, now seen corresponding path program 1 times [2021-06-05 05:11:14,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:14,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63490112] [2021-06-05 05:11:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:14,636 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 05:11:14,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:14,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63490112] [2021-06-05 05:11:14,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63490112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:14,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878388508] [2021-06-05 05:11:14,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:11:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:14,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:14,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:14,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 05:11:14,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:14,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:14,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:14,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 05:11:15,001 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 05:11:15,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878388508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:15,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:15,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 05:11:15,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131770065] [2021-06-05 05:11:15,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:11:15,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:15,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:11:15,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:11:15,003 INFO L87 Difference]: Start difference. First operand 1422 states and 5869 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:15,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:15,847 INFO L93 Difference]: Finished difference Result 1985 states and 8093 transitions. [2021-06-05 05:11:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:11:15,847 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:15,860 INFO L225 Difference]: With dead ends: 1985 [2021-06-05 05:11:15,860 INFO L226 Difference]: Without dead ends: 1966 [2021-06-05 05:11:15,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 681.3ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:11:15,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-06-05 05:11:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1519. [2021-06-05 05:11:15,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 4.118577075098814) internal successors, (6252), 1518 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 6252 transitions. [2021-06-05 05:11:15,904 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 6252 transitions. Word has length 29 [2021-06-05 05:11:15,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:15,904 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 6252 transitions. [2021-06-05 05:11:15,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:15,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 6252 transitions. [2021-06-05 05:11:15,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:15,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:15,909 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] [2021-06-05 05:11:16,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:16,129 INFO L430 AbstractCegarLoop]: === Iteration 9 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash 863481530, now seen corresponding path program 2 times [2021-06-05 05:11:16,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:16,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671791413] [2021-06-05 05:11:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:16,265 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 05:11:16,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:16,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671791413] [2021-06-05 05:11:16,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671791413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:16,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795421085] [2021-06-05 05:11:16,266 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 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 05:11:16,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:16,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:16,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:16,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:16,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:16,461 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 13 treesize of output 17 [2021-06-05 05:11:16,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:16,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:16,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:16,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 05:11:16,647 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 05:11:16,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795421085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:16,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:16,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:16,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068414580] [2021-06-05 05:11:16,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:16,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:16,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:16,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:16,649 INFO L87 Difference]: Start difference. First operand 1519 states and 6252 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:17,074 INFO L93 Difference]: Finished difference Result 1822 states and 7414 transitions. [2021-06-05 05:11:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:11:17,074 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:17,102 INFO L225 Difference]: With dead ends: 1822 [2021-06-05 05:11:17,102 INFO L226 Difference]: Without dead ends: 1803 [2021-06-05 05:11:17,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:11:17,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2021-06-05 05:11:17,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1522. [2021-06-05 05:11:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 4.117028270874425) internal successors, (6262), 1521 states have internal predecessors, (6262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 6262 transitions. [2021-06-05 05:11:17,144 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 6262 transitions. Word has length 29 [2021-06-05 05:11:17,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:17,144 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 6262 transitions. [2021-06-05 05:11:17,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:17,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 6262 transitions. [2021-06-05 05:11:17,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:17,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:17,150 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] [2021-06-05 05:11:17,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:17,365 INFO L430 AbstractCegarLoop]: === Iteration 10 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:17,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:17,365 INFO L82 PathProgramCache]: Analyzing trace with hash 299884106, now seen corresponding path program 3 times [2021-06-05 05:11:17,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:17,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822558014] [2021-06-05 05:11:17,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:17,476 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 05:11:17,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:17,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822558014] [2021-06-05 05:11:17,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822558014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:17,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27108419] [2021-06-05 05:11:17,477 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 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 05:11:17,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:11:17,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:17,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:17,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:17,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:17,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-05 05:11:17,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:17,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:17,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:17,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 05:11:17,786 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 05:11:17,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27108419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:17,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:17,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:17,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603406397] [2021-06-05 05:11:17,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:17,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:17,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:17,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:17,788 INFO L87 Difference]: Start difference. First operand 1522 states and 6262 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:18,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:18,245 INFO L93 Difference]: Finished difference Result 1919 states and 7749 transitions. [2021-06-05 05:11:18,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:11:18,246 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:18,254 INFO L225 Difference]: With dead ends: 1919 [2021-06-05 05:11:18,254 INFO L226 Difference]: Without dead ends: 1900 [2021-06-05 05:11:18,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 406.8ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:11:18,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2021-06-05 05:11:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1529. [2021-06-05 05:11:18,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 4.111910994764398) internal successors, (6283), 1528 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:18,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 6283 transitions. [2021-06-05 05:11:18,294 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 6283 transitions. Word has length 29 [2021-06-05 05:11:18,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:18,294 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 6283 transitions. [2021-06-05 05:11:18,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:18,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 6283 transitions. [2021-06-05 05:11:18,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:18,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:18,299 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] [2021-06-05 05:11:18,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:11:18,513 INFO L430 AbstractCegarLoop]: === Iteration 11 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:18,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:18,513 INFO L82 PathProgramCache]: Analyzing trace with hash -71340900, now seen corresponding path program 4 times [2021-06-05 05:11:18,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:18,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523924884] [2021-06-05 05:11:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:18,628 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 05:11:18,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:18,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523924884] [2021-06-05 05:11:18,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523924884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:18,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920829318] [2021-06-05 05:11:18,628 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 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 05:11:18,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:18,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:18,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:18,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:18,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 05:11:18,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:18,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:18,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:18,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:15 [2021-06-05 05:11:18,885 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 05:11:18,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920829318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:18,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:18,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 05:11:18,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292578042] [2021-06-05 05:11:18,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:11:18,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:18,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:11:18,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:11:18,886 INFO L87 Difference]: Start difference. First operand 1529 states and 6283 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:19,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:19,665 INFO L93 Difference]: Finished difference Result 2650 states and 10619 transitions. [2021-06-05 05:11:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:11:19,666 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:19,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:19,673 INFO L225 Difference]: With dead ends: 2650 [2021-06-05 05:11:19,673 INFO L226 Difference]: Without dead ends: 2626 [2021-06-05 05:11:19,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 540.5ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:11:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-05 05:11:19,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1650. [2021-06-05 05:11:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 4.138872043662826) internal successors, (6825), 1649 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 6825 transitions. [2021-06-05 05:11:19,724 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 6825 transitions. Word has length 29 [2021-06-05 05:11:19,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:19,724 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 6825 transitions. [2021-06-05 05:11:19,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:19,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 6825 transitions. [2021-06-05 05:11:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:19,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:19,729 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] [2021-06-05 05:11:19,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 05:11:19,945 INFO L430 AbstractCegarLoop]: === Iteration 12 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:19,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:19,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1739734342, now seen corresponding path program 5 times [2021-06-05 05:11:19,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:19,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403322582] [2021-06-05 05:11:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:20,066 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 05:11:20,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:20,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403322582] [2021-06-05 05:11:20,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403322582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:20,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712507622] [2021-06-05 05:11:20,066 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 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 05:11:20,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:20,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:20,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:20,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:20,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 05:11:20,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:20,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:20,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:20,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:15 [2021-06-05 05:11:20,343 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 05:11:20,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712507622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:20,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:20,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 05:11:20,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100926422] [2021-06-05 05:11:20,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:11:20,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:20,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:11:20,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:11:20,345 INFO L87 Difference]: Start difference. First operand 1650 states and 6825 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:21,130 INFO L93 Difference]: Finished difference Result 2697 states and 10750 transitions. [2021-06-05 05:11:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:11:21,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:21,138 INFO L225 Difference]: With dead ends: 2697 [2021-06-05 05:11:21,139 INFO L226 Difference]: Without dead ends: 2648 [2021-06-05 05:11:21,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 536.1ms TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:11:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-05 05:11:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1614. [2021-06-05 05:11:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 4.145071295722257) internal successors, (6686), 1613 states have internal predecessors, (6686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 6686 transitions. [2021-06-05 05:11:21,196 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 6686 transitions. Word has length 29 [2021-06-05 05:11:21,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:21,196 INFO L482 AbstractCegarLoop]: Abstraction has 1614 states and 6686 transitions. [2021-06-05 05:11:21,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 6686 transitions. [2021-06-05 05:11:21,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:21,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:21,202 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] [2021-06-05 05:11:21,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:21,425 INFO L430 AbstractCegarLoop]: === Iteration 13 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:21,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1333837744, now seen corresponding path program 6 times [2021-06-05 05:11:21,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:21,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144474560] [2021-06-05 05:11:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:21,574 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 05:11:21,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:21,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144474560] [2021-06-05 05:11:21,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144474560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:21,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133709863] [2021-06-05 05:11:21,574 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 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 05:11:21,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:11:21,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:21,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:21,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:21,747 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 15 treesize of output 9 [2021-06-05 05:11:21,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:21,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:21,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:21,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2021-06-05 05:11:21,890 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 05:11:21,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133709863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:21,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:21,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 05:11:21,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343188522] [2021-06-05 05:11:21,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:11:21,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:21,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:11:21,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:11:21,892 INFO L87 Difference]: Start difference. First operand 1614 states and 6686 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:22,868 INFO L93 Difference]: Finished difference Result 2293 states and 9357 transitions. [2021-06-05 05:11:22,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:11:22,869 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:22,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:22,876 INFO L225 Difference]: With dead ends: 2293 [2021-06-05 05:11:22,876 INFO L226 Difference]: Without dead ends: 2274 [2021-06-05 05:11:22,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 752.1ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:11:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-06-05 05:11:22,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 1602. [2021-06-05 05:11:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1601 states have (on average 4.147407870081199) internal successors, (6640), 1601 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:22,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 6640 transitions. [2021-06-05 05:11:22,920 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 6640 transitions. Word has length 29 [2021-06-05 05:11:22,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:22,920 INFO L482 AbstractCegarLoop]: Abstraction has 1602 states and 6640 transitions. [2021-06-05 05:11:22,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:22,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 6640 transitions. [2021-06-05 05:11:22,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:22,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:22,927 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] [2021-06-05 05:11:23,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:23,149 INFO L430 AbstractCegarLoop]: === Iteration 14 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:23,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:23,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2042972034, now seen corresponding path program 7 times [2021-06-05 05:11:23,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:23,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124677581] [2021-06-05 05:11:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:23,293 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 05:11:23,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:23,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124677581] [2021-06-05 05:11:23,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124677581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:23,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121330077] [2021-06-05 05:11:23,294 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 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 05:11:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:23,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:23,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:23,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:11:23,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:23,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:23,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:23,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:11:23,550 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 05:11:23,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121330077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:23,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:23,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 05:11:23,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174235170] [2021-06-05 05:11:23,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:11:23,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:23,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:11:23,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:11:23,552 INFO L87 Difference]: Start difference. First operand 1602 states and 6640 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:24,432 INFO L93 Difference]: Finished difference Result 2621 states and 10631 transitions. [2021-06-05 05:11:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:11:24,433 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:24,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:24,441 INFO L225 Difference]: With dead ends: 2621 [2021-06-05 05:11:24,441 INFO L226 Difference]: Without dead ends: 2583 [2021-06-05 05:11:24,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 709.7ms TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:11:24,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-06-05 05:11:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 1794. [2021-06-05 05:11:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 4.1751254880089235) internal successors, (7486), 1793 states have internal predecessors, (7486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:24,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 7486 transitions. [2021-06-05 05:11:24,488 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 7486 transitions. Word has length 29 [2021-06-05 05:11:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:24,488 INFO L482 AbstractCegarLoop]: Abstraction has 1794 states and 7486 transitions. [2021-06-05 05:11:24,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:24,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 7486 transitions. [2021-06-05 05:11:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:24,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:24,493 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] [2021-06-05 05:11:24,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 05:11:24,709 INFO L430 AbstractCegarLoop]: === Iteration 15 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:24,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:24,709 INFO L82 PathProgramCache]: Analyzing trace with hash -739699428, now seen corresponding path program 8 times [2021-06-05 05:11:24,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:24,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082250583] [2021-06-05 05:11:24,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:24,831 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 05:11:24,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:24,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082250583] [2021-06-05 05:11:24,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082250583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:24,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367833213] [2021-06-05 05:11:24,832 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 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 05:11:24,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:24,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:24,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:24,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:24,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:24,954 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 05:11:24,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:24,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:24,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:24,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:11:25,125 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 05:11:25,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367833213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:25,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:25,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:25,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145705757] [2021-06-05 05:11:25,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:25,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:25,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:25,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:25,127 INFO L87 Difference]: Start difference. First operand 1794 states and 7486 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:25,606 INFO L93 Difference]: Finished difference Result 2154 states and 8857 transitions. [2021-06-05 05:11:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:11:25,606 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:25,612 INFO L225 Difference]: With dead ends: 2154 [2021-06-05 05:11:25,612 INFO L226 Difference]: Without dead ends: 2141 [2021-06-05 05:11:25,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 418.6ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:11:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-06-05 05:11:25,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1787. [2021-06-05 05:11:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 4.1780515117581185) internal successors, (7462), 1786 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 7462 transitions. [2021-06-05 05:11:25,657 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 7462 transitions. Word has length 29 [2021-06-05 05:11:25,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:25,657 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 7462 transitions. [2021-06-05 05:11:25,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:25,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 7462 transitions. [2021-06-05 05:11:25,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:25,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:25,661 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] [2021-06-05 05:11:25,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:11:25,869 INFO L430 AbstractCegarLoop]: === Iteration 16 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:25,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:25,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1639061500, now seen corresponding path program 9 times [2021-06-05 05:11:25,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:25,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382849488] [2021-06-05 05:11:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:26,004 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 05:11:26,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:26,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382849488] [2021-06-05 05:11:26,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382849488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:26,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782716322] [2021-06-05 05:11:26,004 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 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 05:11:26,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:11:26,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:26,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:11:26,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:26,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:26,173 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 05:11:26,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:26,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:26,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:26,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 05:11:26,360 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 05:11:26,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782716322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:26,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:26,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:26,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245441968] [2021-06-05 05:11:26,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:26,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:26,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:26,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:26,362 INFO L87 Difference]: Start difference. First operand 1787 states and 7462 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:26,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:26,784 INFO L93 Difference]: Finished difference Result 2189 states and 8940 transitions. [2021-06-05 05:11:26,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:11:26,785 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:26,790 INFO L225 Difference]: With dead ends: 2189 [2021-06-05 05:11:26,790 INFO L226 Difference]: Without dead ends: 2174 [2021-06-05 05:11:26,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 423.0ms TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:11:26,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-06-05 05:11:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1794. [2021-06-05 05:11:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 4.173452314556609) internal successors, (7483), 1793 states have internal predecessors, (7483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 7483 transitions. [2021-06-05 05:11:26,835 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 7483 transitions. Word has length 29 [2021-06-05 05:11:26,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:26,836 INFO L482 AbstractCegarLoop]: Abstraction has 1794 states and 7483 transitions. [2021-06-05 05:11:26,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:26,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 7483 transitions. [2021-06-05 05:11:26,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:26,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:26,843 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] [2021-06-05 05:11:27,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 05:11:27,049 INFO L430 AbstractCegarLoop]: === Iteration 17 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:27,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:27,049 INFO L82 PathProgramCache]: Analyzing trace with hash 875307494, now seen corresponding path program 10 times [2021-06-05 05:11:27,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:27,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335072548] [2021-06-05 05:11:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:27,164 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 05:11:27,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:27,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335072548] [2021-06-05 05:11:27,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335072548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:27,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593991856] [2021-06-05 05:11:27,164 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 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 05:11:27,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:27,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:27,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:27,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:27,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:11:27,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:27,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:27,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:27,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:11:27,422 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 05:11:27,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593991856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:27,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:27,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 05:11:27,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704659978] [2021-06-05 05:11:27,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:11:27,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:27,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:11:27,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:11:27,425 INFO L87 Difference]: Start difference. First operand 1794 states and 7483 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:28,150 INFO L93 Difference]: Finished difference Result 2601 states and 10341 transitions. [2021-06-05 05:11:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:11:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:28,156 INFO L225 Difference]: With dead ends: 2601 [2021-06-05 05:11:28,156 INFO L226 Difference]: Without dead ends: 2561 [2021-06-05 05:11:28,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 566.1ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:11:28,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-06-05 05:11:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 1747. [2021-06-05 05:11:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 4.18213058419244) internal successors, (7302), 1746 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:28,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 7302 transitions. [2021-06-05 05:11:28,212 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 7302 transitions. Word has length 29 [2021-06-05 05:11:28,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:28,212 INFO L482 AbstractCegarLoop]: Abstraction has 1747 states and 7302 transitions. [2021-06-05 05:11:28,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:28,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 7302 transitions. [2021-06-05 05:11:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:28,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:28,216 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] [2021-06-05 05:11:28,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:28,430 INFO L430 AbstractCegarLoop]: === Iteration 18 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:28,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:28,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1269743148, now seen corresponding path program 11 times [2021-06-05 05:11:28,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:28,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592976180] [2021-06-05 05:11:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:28,570 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 05:11:28,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:28,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592976180] [2021-06-05 05:11:28,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592976180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:28,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464006972] [2021-06-05 05:11:28,570 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 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 05:11:28,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:11:28,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:28,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:28,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:28,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:11:28,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:28,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:28,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:28,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:11:28,803 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 05:11:28,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464006972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:28,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:28,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 05:11:28,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618483928] [2021-06-05 05:11:28,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:11:28,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:28,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:11:28,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:11:28,804 INFO L87 Difference]: Start difference. First operand 1747 states and 7302 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:29,441 INFO L93 Difference]: Finished difference Result 2160 states and 8941 transitions. [2021-06-05 05:11:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:11:29,441 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:29,446 INFO L225 Difference]: With dead ends: 2160 [2021-06-05 05:11:29,446 INFO L226 Difference]: Without dead ends: 2145 [2021-06-05 05:11:29,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 535.9ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:11:29,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-06-05 05:11:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1744. [2021-06-05 05:11:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 4.183591508892714) internal successors, (7292), 1743 states have internal predecessors, (7292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 7292 transitions. [2021-06-05 05:11:29,489 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 7292 transitions. Word has length 29 [2021-06-05 05:11:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:29,489 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 7292 transitions. [2021-06-05 05:11:29,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 7292 transitions. [2021-06-05 05:11:29,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:29,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:29,494 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] [2021-06-05 05:11:29,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:11:29,707 INFO L430 AbstractCegarLoop]: === Iteration 19 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:29,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:29,707 INFO L82 PathProgramCache]: Analyzing trace with hash 220970746, now seen corresponding path program 12 times [2021-06-05 05:11:29,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:29,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307230067] [2021-06-05 05:11:29,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:29,856 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 05:11:29,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:29,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307230067] [2021-06-05 05:11:29,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307230067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:29,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064016188] [2021-06-05 05:11:29,856 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 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 05:11:29,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:11:29,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:29,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:11:29,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:29,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:29,941 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 05:11:29,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:29,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:29,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:29,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 05:11:30,053 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 05:11:30,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064016188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:30,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:30,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 05:11:30,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626848247] [2021-06-05 05:11:30,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:11:30,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:30,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:11:30,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:11:30,054 INFO L87 Difference]: Start difference. First operand 1744 states and 7292 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 05:11:30,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:30,366 INFO L93 Difference]: Finished difference Result 2257 states and 9217 transitions. [2021-06-05 05:11:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:11:30,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 29 [2021-06-05 05:11:30,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:30,371 INFO L225 Difference]: With dead ends: 2257 [2021-06-05 05:11:30,371 INFO L226 Difference]: Without dead ends: 2238 [2021-06-05 05:11:30,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-06-05 05:11:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1814. [2021-06-05 05:11:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 4.200220628792057) internal successors, (7615), 1813 states have internal predecessors, (7615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 7615 transitions. [2021-06-05 05:11:30,415 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 7615 transitions. Word has length 29 [2021-06-05 05:11:30,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:30,415 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 7615 transitions. [2021-06-05 05:11:30,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 05:11:30,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 7615 transitions. [2021-06-05 05:11:30,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:30,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:30,419 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] [2021-06-05 05:11:30,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:30,633 INFO L430 AbstractCegarLoop]: === Iteration 20 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:30,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:30,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1524243352, now seen corresponding path program 13 times [2021-06-05 05:11:30,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:30,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946735602] [2021-06-05 05:11:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:30,742 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 05:11:30,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:30,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946735602] [2021-06-05 05:11:30,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946735602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:30,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887179784] [2021-06-05 05:11:30,743 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 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 05:11:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:30,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:30,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:30,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:11:30,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:30,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:30,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:30,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:11:30,940 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 05:11:30,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887179784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:30,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:30,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 05:11:30,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504762386] [2021-06-05 05:11:30,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:11:30,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:30,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:11:30,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:11:30,942 INFO L87 Difference]: Start difference. First operand 1814 states and 7615 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:31,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:31,597 INFO L93 Difference]: Finished difference Result 2776 states and 11185 transitions. [2021-06-05 05:11:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:11:31,601 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:31,606 INFO L225 Difference]: With dead ends: 2776 [2021-06-05 05:11:31,606 INFO L226 Difference]: Without dead ends: 2752 [2021-06-05 05:11:31,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:11:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-06-05 05:11:31,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1926. [2021-06-05 05:11:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 4.208311688311689) internal successors, (8101), 1925 states have internal predecessors, (8101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 8101 transitions. [2021-06-05 05:11:31,645 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 8101 transitions. Word has length 29 [2021-06-05 05:11:31,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:31,645 INFO L482 AbstractCegarLoop]: Abstraction has 1926 states and 8101 transitions. [2021-06-05 05:11:31,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:31,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 8101 transitions. [2021-06-05 05:11:31,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:31,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:31,650 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] [2021-06-05 05:11:31,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:31,865 INFO L430 AbstractCegarLoop]: === Iteration 21 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:31,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:31,866 INFO L82 PathProgramCache]: Analyzing trace with hash -144150090, now seen corresponding path program 14 times [2021-06-05 05:11:31,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:31,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992417121] [2021-06-05 05:11:31,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:31,969 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 05:11:31,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:31,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992417121] [2021-06-05 05:11:31,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992417121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:31,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323640196] [2021-06-05 05:11:31,969 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 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 05:11:32,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:32,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:32,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:32,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:32,068 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 05:11:32,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:32,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:32,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:32,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:11:32,218 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 05:11:32,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323640196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:32,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:32,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:32,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089799252] [2021-06-05 05:11:32,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:32,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:32,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:32,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:32,220 INFO L87 Difference]: Start difference. First operand 1926 states and 8101 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:32,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:32,587 INFO L93 Difference]: Finished difference Result 2334 states and 9589 transitions. [2021-06-05 05:11:32,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:11:32,587 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:32,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:32,592 INFO L225 Difference]: With dead ends: 2334 [2021-06-05 05:11:32,592 INFO L226 Difference]: Without dead ends: 2320 [2021-06-05 05:11:32,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 368.9ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:11:32,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-05 05:11:32,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1919. [2021-06-05 05:11:32,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 4.211157455683003) internal successors, (8077), 1918 states have internal predecessors, (8077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 8077 transitions. [2021-06-05 05:11:32,627 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 8077 transitions. Word has length 29 [2021-06-05 05:11:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:32,627 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 8077 transitions. [2021-06-05 05:11:32,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 8077 transitions. [2021-06-05 05:11:32,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:32,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:32,632 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] [2021-06-05 05:11:32,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 05:11:32,845 INFO L430 AbstractCegarLoop]: === Iteration 22 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:32,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:32,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1470856832, now seen corresponding path program 15 times [2021-06-05 05:11:32,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:32,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261066496] [2021-06-05 05:11:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:32,957 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 05:11:32,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:32,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261066496] [2021-06-05 05:11:32,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261066496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:32,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118245997] [2021-06-05 05:11:32,957 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 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 05:11:32,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:11:32,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:32,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:11:32,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:33,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:33,072 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 05:11:33,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:33,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:33,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:33,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 05:11:33,248 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 05:11:33,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118245997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:33,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:33,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:33,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19697541] [2021-06-05 05:11:33,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:33,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:33,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:33,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:33,250 INFO L87 Difference]: Start difference. First operand 1919 states and 8077 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:33,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:33,598 INFO L93 Difference]: Finished difference Result 2310 states and 9540 transitions. [2021-06-05 05:11:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:11:33,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:33,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:33,602 INFO L225 Difference]: With dead ends: 2310 [2021-06-05 05:11:33,602 INFO L226 Difference]: Without dead ends: 2287 [2021-06-05 05:11:33,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 318.9ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:11:33,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-06-05 05:11:33,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1872. [2021-06-05 05:11:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 4.220203099946553) internal successors, (7896), 1871 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 7896 transitions. [2021-06-05 05:11:33,641 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 7896 transitions. Word has length 29 [2021-06-05 05:11:33,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:33,641 INFO L482 AbstractCegarLoop]: Abstraction has 1872 states and 7896 transitions. [2021-06-05 05:11:33,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 7896 transitions. [2021-06-05 05:11:33,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:33,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:33,647 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] [2021-06-05 05:11:33,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:33,861 INFO L430 AbstractCegarLoop]: === Iteration 23 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:33,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:33,861 INFO L82 PathProgramCache]: Analyzing trace with hash 740203066, now seen corresponding path program 16 times [2021-06-05 05:11:33,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:33,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002483456] [2021-06-05 05:11:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:33,983 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 05:11:33,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:33,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002483456] [2021-06-05 05:11:33,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002483456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:33,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695291931] [2021-06-05 05:11:33,983 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 05:11:34,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:34,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:34,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:34,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:34,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:11:34,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:34,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:34,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:34,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:11:34,187 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 05:11:34,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695291931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:34,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:34,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 05:11:34,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2369545] [2021-06-05 05:11:34,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:11:34,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:34,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:11:34,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:11:34,189 INFO L87 Difference]: Start difference. First operand 1872 states and 7896 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:34,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:34,902 INFO L93 Difference]: Finished difference Result 2324 states and 9664 transitions. [2021-06-05 05:11:34,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:11:34,903 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:34,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:34,907 INFO L225 Difference]: With dead ends: 2324 [2021-06-05 05:11:34,907 INFO L226 Difference]: Without dead ends: 2305 [2021-06-05 05:11:34,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 618.5ms TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:11:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-06-05 05:11:34,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1872. [2021-06-05 05:11:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 4.220203099946553) internal successors, (7896), 1871 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 7896 transitions. [2021-06-05 05:11:34,940 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 7896 transitions. Word has length 29 [2021-06-05 05:11:34,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:34,941 INFO L482 AbstractCegarLoop]: Abstraction has 1872 states and 7896 transitions. [2021-06-05 05:11:34,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:34,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 7896 transitions. [2021-06-05 05:11:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:34,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:34,945 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] [2021-06-05 05:11:35,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:11:35,161 INFO L430 AbstractCegarLoop]: === Iteration 24 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:35,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:35,161 INFO L82 PathProgramCache]: Analyzing trace with hash 176605642, now seen corresponding path program 17 times [2021-06-05 05:11:35,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:35,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410360425] [2021-06-05 05:11:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:35,313 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 05:11:35,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:35,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410360425] [2021-06-05 05:11:35,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410360425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:35,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420997856] [2021-06-05 05:11:35,314 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 05:11:35,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:35,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:35,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:35,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:35,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:11:35,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:35,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:35,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:35,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:11:35,542 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 05:11:35,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420997856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:35,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:35,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 05:11:35,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385575325] [2021-06-05 05:11:35,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:11:35,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:35,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:11:35,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:11:35,543 INFO L87 Difference]: Start difference. First operand 1872 states and 7896 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:36,300 INFO L93 Difference]: Finished difference Result 2792 states and 11337 transitions. [2021-06-05 05:11:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:11:36,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:36,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:36,306 INFO L225 Difference]: With dead ends: 2792 [2021-06-05 05:11:36,306 INFO L226 Difference]: Without dead ends: 2750 [2021-06-05 05:11:36,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 679.1ms TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:11:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-06-05 05:11:36,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 1860. [2021-06-05 05:11:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 4.2210866057019905) internal successors, (7847), 1859 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:36,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 7847 transitions. [2021-06-05 05:11:36,337 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 7847 transitions. Word has length 29 [2021-06-05 05:11:36,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:36,337 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 7847 transitions. [2021-06-05 05:11:36,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:36,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 7847 transitions. [2021-06-05 05:11:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:36,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:36,340 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] [2021-06-05 05:11:36,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 05:11:36,545 INFO L430 AbstractCegarLoop]: === Iteration 25 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:36,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:36,545 INFO L82 PathProgramCache]: Analyzing trace with hash -81335312, now seen corresponding path program 18 times [2021-06-05 05:11:36,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:36,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019695460] [2021-06-05 05:11:36,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:36,654 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 05:11:36,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:36,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019695460] [2021-06-05 05:11:36,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019695460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:36,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702680779] [2021-06-05 05:11:36,655 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 05:11:36,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:11:36,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:36,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:36,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:36,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:36,793 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 13 treesize of output 17 [2021-06-05 05:11:36,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:36,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:36,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:36,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 05:11:36,964 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 05:11:36,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702680779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:36,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:36,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:36,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558131848] [2021-06-05 05:11:36,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:36,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:36,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:36,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:36,965 INFO L87 Difference]: Start difference. First operand 1860 states and 7847 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:37,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:37,761 INFO L93 Difference]: Finished difference Result 2571 states and 10667 transitions. [2021-06-05 05:11:37,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:11:37,761 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:37,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:37,767 INFO L225 Difference]: With dead ends: 2571 [2021-06-05 05:11:37,767 INFO L226 Difference]: Without dead ends: 2552 [2021-06-05 05:11:37,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 724.1ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:11:37,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-06-05 05:11:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 1990. [2021-06-05 05:11:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 4.24534942182001) internal successors, (8444), 1989 states have internal predecessors, (8444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:37,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 8444 transitions. [2021-06-05 05:11:37,798 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 8444 transitions. Word has length 29 [2021-06-05 05:11:37,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:37,798 INFO L482 AbstractCegarLoop]: Abstraction has 1990 states and 8444 transitions. [2021-06-05 05:11:37,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:37,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 8444 transitions. [2021-06-05 05:11:37,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:37,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:37,801 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] [2021-06-05 05:11:38,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:38,002 INFO L430 AbstractCegarLoop]: === Iteration 26 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:38,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:38,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1221937294, now seen corresponding path program 19 times [2021-06-05 05:11:38,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:38,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606613792] [2021-06-05 05:11:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:38,116 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 05:11:38,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:38,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606613792] [2021-06-05 05:11:38,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606613792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:38,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444953070] [2021-06-05 05:11:38,116 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 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 05:11:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:38,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:38,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:38,259 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 13 treesize of output 9 [2021-06-05 05:11:38,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:38,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:38,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:38,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:25 [2021-06-05 05:11:38,372 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 05:11:38,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444953070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:38,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:38,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:38,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985637155] [2021-06-05 05:11:38,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:38,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:38,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:38,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:38,374 INFO L87 Difference]: Start difference. First operand 1990 states and 8444 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:38,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:38,908 INFO L93 Difference]: Finished difference Result 2682 states and 10901 transitions. [2021-06-05 05:11:38,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:11:38,908 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:38,913 INFO L225 Difference]: With dead ends: 2682 [2021-06-05 05:11:38,913 INFO L226 Difference]: Without dead ends: 2632 [2021-06-05 05:11:38,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 406.6ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:11:38,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-06-05 05:11:38,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2066. [2021-06-05 05:11:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 4.24455205811138) internal successors, (8765), 2065 states have internal predecessors, (8765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 8765 transitions. [2021-06-05 05:11:38,975 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 8765 transitions. Word has length 29 [2021-06-05 05:11:38,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:38,975 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 8765 transitions. [2021-06-05 05:11:38,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:38,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 8765 transitions. [2021-06-05 05:11:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:38,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:38,980 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] [2021-06-05 05:11:39,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 05:11:39,190 INFO L430 AbstractCegarLoop]: === Iteration 27 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:39,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:39,190 INFO L82 PathProgramCache]: Analyzing trace with hash -446456148, now seen corresponding path program 20 times [2021-06-05 05:11:39,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:39,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9368094] [2021-06-05 05:11:39,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:39,314 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 05:11:39,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:39,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9368094] [2021-06-05 05:11:39,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9368094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:39,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328123165] [2021-06-05 05:11:39,314 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 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 05:11:39,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:39,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:39,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:39,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:39,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:39,429 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 13 treesize of output 17 [2021-06-05 05:11:39,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:39,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:39,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:39,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 05:11:39,548 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 05:11:39,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328123165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:39,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:39,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:39,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37841388] [2021-06-05 05:11:39,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:39,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:39,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:39,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:39,549 INFO L87 Difference]: Start difference. First operand 2066 states and 8765 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:40,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:40,126 INFO L93 Difference]: Finished difference Result 2516 states and 10449 transitions. [2021-06-05 05:11:40,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:11:40,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:40,131 INFO L225 Difference]: With dead ends: 2516 [2021-06-05 05:11:40,131 INFO L226 Difference]: Without dead ends: 2498 [2021-06-05 05:11:40,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:11:40,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-05 05:11:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2059. [2021-06-05 05:11:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2058 states have (on average 4.2497570456754135) internal successors, (8746), 2058 states have internal predecessors, (8746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 8746 transitions. [2021-06-05 05:11:40,162 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 8746 transitions. Word has length 29 [2021-06-05 05:11:40,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:40,162 INFO L482 AbstractCegarLoop]: Abstraction has 2059 states and 8746 transitions. [2021-06-05 05:11:40,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:40,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 8746 transitions. [2021-06-05 05:11:40,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:40,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:40,166 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] [2021-06-05 05:11:40,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:40,366 INFO L430 AbstractCegarLoop]: === Iteration 28 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:40,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:40,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1168550774, now seen corresponding path program 21 times [2021-06-05 05:11:40,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:40,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284580855] [2021-06-05 05:11:40,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:40,511 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 05:11:40,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:40,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284580855] [2021-06-05 05:11:40,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284580855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:40,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005046615] [2021-06-05 05:11:40,512 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 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 05:11:40,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:11:40,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:40,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:40,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:40,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:40,633 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 13 treesize of output 17 [2021-06-05 05:11:40,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:40,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:40,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:40,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 05:11:40,776 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 05:11:40,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005046615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:40,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:40,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:40,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557068505] [2021-06-05 05:11:40,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:40,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:40,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:40,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:40,777 INFO L87 Difference]: Start difference. First operand 2059 states and 8746 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:41,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:41,451 INFO L93 Difference]: Finished difference Result 2525 states and 10479 transitions. [2021-06-05 05:11:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:41,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:41,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:41,457 INFO L225 Difference]: With dead ends: 2525 [2021-06-05 05:11:41,457 INFO L226 Difference]: Without dead ends: 2486 [2021-06-05 05:11:41,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 607.8ms TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:11:41,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-06-05 05:11:41,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2034. [2021-06-05 05:11:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 4.254795868175111) internal successors, (8650), 2033 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:41,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 8650 transitions. [2021-06-05 05:11:41,497 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 8650 transitions. Word has length 29 [2021-06-05 05:11:41,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:41,497 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 8650 transitions. [2021-06-05 05:11:41,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:41,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 8650 transitions. [2021-06-05 05:11:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:41,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:41,502 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] [2021-06-05 05:11:41,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 05:11:41,724 INFO L430 AbstractCegarLoop]: === Iteration 29 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:41,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:41,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1063587426, now seen corresponding path program 22 times [2021-06-05 05:11:41,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:41,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710986003] [2021-06-05 05:11:41,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:41,842 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 05:11:41,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:41,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710986003] [2021-06-05 05:11:41,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710986003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:41,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302700278] [2021-06-05 05:11:41,842 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 05:11:41,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:41,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:41,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:41,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:42,002 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 13 treesize of output 9 [2021-06-05 05:11:42,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:42,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:42,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:42,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:25 [2021-06-05 05:11:42,167 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 05:11:42,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302700278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:42,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:42,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:42,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200824012] [2021-06-05 05:11:42,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:42,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:42,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:42,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:42,168 INFO L87 Difference]: Start difference. First operand 2034 states and 8650 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:42,737 INFO L93 Difference]: Finished difference Result 2413 states and 10090 transitions. [2021-06-05 05:11:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:11:42,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:42,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:42,742 INFO L225 Difference]: With dead ends: 2413 [2021-06-05 05:11:42,742 INFO L226 Difference]: Without dead ends: 2369 [2021-06-05 05:11:42,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 565.6ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:11:42,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-06-05 05:11:42,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 2037. [2021-06-05 05:11:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2037 states, 2036 states have (on average 4.251473477406679) internal successors, (8656), 2036 states have internal predecessors, (8656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 8656 transitions. [2021-06-05 05:11:42,771 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 8656 transitions. Word has length 29 [2021-06-05 05:11:42,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:42,771 INFO L482 AbstractCegarLoop]: Abstraction has 2037 states and 8656 transitions. [2021-06-05 05:11:42,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:42,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 8656 transitions. [2021-06-05 05:11:42,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:42,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:42,775 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] [2021-06-05 05:11:42,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 05:11:42,975 INFO L430 AbstractCegarLoop]: === Iteration 30 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:42,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:42,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1021005372, now seen corresponding path program 23 times [2021-06-05 05:11:42,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:42,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957213455] [2021-06-05 05:11:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:43,108 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 05:11:43,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:43,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957213455] [2021-06-05 05:11:43,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957213455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:43,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4267493] [2021-06-05 05:11:43,109 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 05:11:43,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:43,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:43,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:43,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:43,225 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 15 treesize of output 9 [2021-06-05 05:11:43,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:43,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:43,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:43,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2021-06-05 05:11:43,325 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 05:11:43,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4267493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:43,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:43,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 05:11:43,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440561252] [2021-06-05 05:11:43,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:11:43,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:43,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:11:43,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:11:43,326 INFO L87 Difference]: Start difference. First operand 2037 states and 8656 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:43,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:43,783 INFO L93 Difference]: Finished difference Result 2472 states and 10297 transitions. [2021-06-05 05:11:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:11:43,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:43,789 INFO L225 Difference]: With dead ends: 2472 [2021-06-05 05:11:43,790 INFO L226 Difference]: Without dead ends: 2458 [2021-06-05 05:11:43,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:11:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-06-05 05:11:43,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2027. [2021-06-05 05:11:43,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 4.25715695952616) internal successors, (8625), 2026 states have internal predecessors, (8625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 8625 transitions. [2021-06-05 05:11:43,833 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 8625 transitions. Word has length 29 [2021-06-05 05:11:43,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:43,833 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 8625 transitions. [2021-06-05 05:11:43,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:43,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 8625 transitions. [2021-06-05 05:11:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:43,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:43,838 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] [2021-06-05 05:11:44,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:44,061 INFO L430 AbstractCegarLoop]: === Iteration 31 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:44,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1011868340, now seen corresponding path program 24 times [2021-06-05 05:11:44,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:44,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259823481] [2021-06-05 05:11:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:44,197 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 05:11:44,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:44,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259823481] [2021-06-05 05:11:44,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259823481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:44,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267300830] [2021-06-05 05:11:44,197 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 05:11:44,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:11:44,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:44,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:44,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:44,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:44,361 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 15 treesize of output 19 [2021-06-05 05:11:44,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:44,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:44,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:44,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-05 05:11:44,444 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 05:11:44,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267300830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:44,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:44,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:44,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636394210] [2021-06-05 05:11:44,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:44,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:44,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:44,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:44,445 INFO L87 Difference]: Start difference. First operand 2027 states and 8625 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:44,886 INFO L93 Difference]: Finished difference Result 2232 states and 9404 transitions. [2021-06-05 05:11:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:11:44,887 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:44,891 INFO L225 Difference]: With dead ends: 2232 [2021-06-05 05:11:44,891 INFO L226 Difference]: Without dead ends: 2217 [2021-06-05 05:11:44,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:11:44,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2021-06-05 05:11:44,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2039. [2021-06-05 05:11:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 4.247791952894995) internal successors, (8657), 2038 states have internal predecessors, (8657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:44,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 8657 transitions. [2021-06-05 05:11:44,918 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 8657 transitions. Word has length 29 [2021-06-05 05:11:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:44,918 INFO L482 AbstractCegarLoop]: Abstraction has 2039 states and 8657 transitions. [2021-06-05 05:11:44,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 8657 transitions. [2021-06-05 05:11:44,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:44,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:44,921 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] [2021-06-05 05:11:45,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:45,125 INFO L430 AbstractCegarLoop]: === Iteration 32 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:45,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:45,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1867952308, now seen corresponding path program 25 times [2021-06-05 05:11:45,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:45,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834987206] [2021-06-05 05:11:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:45,234 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 05:11:45,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:45,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834987206] [2021-06-05 05:11:45,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834987206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:45,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179512471] [2021-06-05 05:11:45,235 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 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 05:11:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:45,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:45,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:45,332 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 05:11:45,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:45,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:45,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:45,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-05 05:11:45,480 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 05:11:45,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179512471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:45,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:45,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:45,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374964490] [2021-06-05 05:11:45,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:45,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:45,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:45,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:45,483 INFO L87 Difference]: Start difference. First operand 2039 states and 8657 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:46,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:46,499 INFO L93 Difference]: Finished difference Result 3149 states and 12904 transitions. [2021-06-05 05:11:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:11:46,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:46,506 INFO L225 Difference]: With dead ends: 3149 [2021-06-05 05:11:46,506 INFO L226 Difference]: Without dead ends: 3099 [2021-06-05 05:11:46,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 773.4ms TimeCoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:11:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2021-06-05 05:11:46,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 2218. [2021-06-05 05:11:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 4.256202074875959) internal successors, (9436), 2217 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 9436 transitions. [2021-06-05 05:11:46,543 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 9436 transitions. Word has length 29 [2021-06-05 05:11:46,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:46,543 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 9436 transitions. [2021-06-05 05:11:46,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:46,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 9436 transitions. [2021-06-05 05:11:46,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:46,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:46,547 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] [2021-06-05 05:11:46,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 05:11:46,756 INFO L430 AbstractCegarLoop]: === Iteration 33 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:46,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1123742382, now seen corresponding path program 26 times [2021-06-05 05:11:46,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:46,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131226034] [2021-06-05 05:11:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:46,869 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 05:11:46,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:46,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131226034] [2021-06-05 05:11:46,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131226034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:46,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840030302] [2021-06-05 05:11:46,869 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 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 05:11:46,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:46,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:46,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:46,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:46,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:46,960 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 05:11:46,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:46,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:46,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:11:47,116 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 05:11:47,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840030302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:47,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:47,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:47,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099620426] [2021-06-05 05:11:47,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:47,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:47,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:47,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:47,118 INFO L87 Difference]: Start difference. First operand 2218 states and 9436 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:47,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:47,791 INFO L93 Difference]: Finished difference Result 2623 states and 10952 transitions. [2021-06-05 05:11:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:11:47,792 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:47,797 INFO L225 Difference]: With dead ends: 2623 [2021-06-05 05:11:47,797 INFO L226 Difference]: Without dead ends: 2606 [2021-06-05 05:11:47,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 617.8ms TimeCoverageRelationStatistics Valid=268, Invalid=922, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:11:47,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-06-05 05:11:47,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2211. [2021-06-05 05:11:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 4.261085972850679) internal successors, (9417), 2210 states have internal predecessors, (9417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 9417 transitions. [2021-06-05 05:11:47,829 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 9417 transitions. Word has length 29 [2021-06-05 05:11:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:47,830 INFO L482 AbstractCegarLoop]: Abstraction has 2211 states and 9417 transitions. [2021-06-05 05:11:47,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 9417 transitions. [2021-06-05 05:11:47,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:47,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:47,835 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] [2021-06-05 05:11:48,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:48,049 INFO L430 AbstractCegarLoop]: === Iteration 34 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:48,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2023104454, now seen corresponding path program 27 times [2021-06-05 05:11:48,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:48,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38578919] [2021-06-05 05:11:48,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:48,145 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 05:11:48,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:48,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38578919] [2021-06-05 05:11:48,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38578919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:48,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491032084] [2021-06-05 05:11:48,145 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 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 05:11:48,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:11:48,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:48,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:48,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:48,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:48,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:11:48,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:48,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:48,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:48,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:11:48,419 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 05:11:48,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491032084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:48,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:48,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:48,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427011944] [2021-06-05 05:11:48,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:48,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:48,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:48,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:48,421 INFO L87 Difference]: Start difference. First operand 2211 states and 9417 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:49,308 INFO L93 Difference]: Finished difference Result 2750 states and 11452 transitions. [2021-06-05 05:11:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:11:49,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:49,314 INFO L225 Difference]: With dead ends: 2750 [2021-06-05 05:11:49,314 INFO L226 Difference]: Without dead ends: 2727 [2021-06-05 05:11:49,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 762.1ms TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:11:49,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-06-05 05:11:49,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2206. [2021-06-05 05:11:49,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 4.263038548752834) internal successors, (9400), 2205 states have internal predecessors, (9400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 9400 transitions. [2021-06-05 05:11:49,345 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 9400 transitions. Word has length 29 [2021-06-05 05:11:49,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:49,345 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 9400 transitions. [2021-06-05 05:11:49,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:49,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 9400 transitions. [2021-06-05 05:11:49,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:49,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:49,349 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] [2021-06-05 05:11:49,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 05:11:49,549 INFO L430 AbstractCegarLoop]: === Iteration 35 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:49,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:49,550 INFO L82 PathProgramCache]: Analyzing trace with hash 491264540, now seen corresponding path program 28 times [2021-06-05 05:11:49,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:49,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490044164] [2021-06-05 05:11:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:49,679 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 05:11:49,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:49,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490044164] [2021-06-05 05:11:49,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490044164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:49,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040917359] [2021-06-05 05:11:49,679 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 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 05:11:49,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:49,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:49,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:49,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:49,792 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 05:11:49,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:49,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:49,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:49,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-05 05:11:49,942 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 05:11:49,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040917359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:49,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:49,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:49,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804460857] [2021-06-05 05:11:49,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:49,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:49,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:49,944 INFO L87 Difference]: Start difference. First operand 2206 states and 9400 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:50,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:50,552 INFO L93 Difference]: Finished difference Result 2858 states and 11700 transitions. [2021-06-05 05:11:50,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:11:50,553 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:50,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:50,558 INFO L225 Difference]: With dead ends: 2858 [2021-06-05 05:11:50,558 INFO L226 Difference]: Without dead ends: 2802 [2021-06-05 05:11:50,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 552.7ms TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:11:50,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2021-06-05 05:11:50,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 2142. [2021-06-05 05:11:50,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 4.280709948622139) internal successors, (9165), 2141 states have internal predecessors, (9165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 9165 transitions. [2021-06-05 05:11:50,595 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 9165 transitions. Word has length 29 [2021-06-05 05:11:50,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:50,595 INFO L482 AbstractCegarLoop]: Abstraction has 2142 states and 9165 transitions. [2021-06-05 05:11:50,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 9165 transitions. [2021-06-05 05:11:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:50,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:50,598 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] [2021-06-05 05:11:50,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 05:11:50,799 INFO L430 AbstractCegarLoop]: === Iteration 36 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:50,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:50,799 INFO L82 PathProgramCache]: Analyzing trace with hash 885700194, now seen corresponding path program 29 times [2021-06-05 05:11:50,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:50,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412616566] [2021-06-05 05:11:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:50,915 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 05:11:50,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:50,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412616566] [2021-06-05 05:11:50,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412616566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:50,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069735271] [2021-06-05 05:11:50,915 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 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 05:11:50,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:50,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:50,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:50,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:51,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:11:51,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:51,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:51,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:51,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:11:51,147 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 05:11:51,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069735271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:51,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:51,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 05:11:51,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671682520] [2021-06-05 05:11:51,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:11:51,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:51,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:11:51,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:11:51,149 INFO L87 Difference]: Start difference. First operand 2142 states and 9165 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:51,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:51,729 INFO L93 Difference]: Finished difference Result 2438 states and 10308 transitions. [2021-06-05 05:11:51,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:11:51,729 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:51,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:51,734 INFO L225 Difference]: With dead ends: 2438 [2021-06-05 05:11:51,734 INFO L226 Difference]: Without dead ends: 2423 [2021-06-05 05:11:51,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 555.9ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:11:51,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-05 05:11:51,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2139. [2021-06-05 05:11:51,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 4.2820392890551915) internal successors, (9155), 2138 states have internal predecessors, (9155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 9155 transitions. [2021-06-05 05:11:51,766 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 9155 transitions. Word has length 29 [2021-06-05 05:11:51,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:51,766 INFO L482 AbstractCegarLoop]: Abstraction has 2139 states and 9155 transitions. [2021-06-05 05:11:51,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:51,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 9155 transitions. [2021-06-05 05:11:51,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:51,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:51,771 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] [2021-06-05 05:11:51,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 05:11:51,985 INFO L430 AbstractCegarLoop]: === Iteration 37 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:51,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:51,985 INFO L82 PathProgramCache]: Analyzing trace with hash -163072208, now seen corresponding path program 30 times [2021-06-05 05:11:51,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:51,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367100707] [2021-06-05 05:11:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:52,090 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 05:11:52,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:52,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367100707] [2021-06-05 05:11:52,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367100707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:52,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950281980] [2021-06-05 05:11:52,091 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 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 05:11:52,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:11:52,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:52,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:52,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:52,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:52,198 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 05:11:52,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:52,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:52,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:52,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:11:52,353 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 05:11:52,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950281980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:52,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:52,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:52,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83686608] [2021-06-05 05:11:52,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:52,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:52,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:52,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:52,354 INFO L87 Difference]: Start difference. First operand 2139 states and 9155 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:53,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:53,147 INFO L93 Difference]: Finished difference Result 2816 states and 11722 transitions. [2021-06-05 05:11:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:11:53,147 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:53,153 INFO L225 Difference]: With dead ends: 2816 [2021-06-05 05:11:53,153 INFO L226 Difference]: Without dead ends: 2797 [2021-06-05 05:11:53,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 702.7ms TimeCoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:11:53,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-06-05 05:11:53,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2209. [2021-06-05 05:11:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 4.291213768115942) internal successors, (9475), 2208 states have internal predecessors, (9475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 9475 transitions. [2021-06-05 05:11:53,197 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 9475 transitions. Word has length 29 [2021-06-05 05:11:53,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:53,197 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 9475 transitions. [2021-06-05 05:11:53,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 9475 transitions. [2021-06-05 05:11:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:53,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:53,202 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] [2021-06-05 05:11:53,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:11:53,422 INFO L430 AbstractCegarLoop]: === Iteration 38 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:53,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:53,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1140200398, now seen corresponding path program 31 times [2021-06-05 05:11:53,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:53,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717691478] [2021-06-05 05:11:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:53,546 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 05:11:53,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:53,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717691478] [2021-06-05 05:11:53,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717691478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:53,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189467145] [2021-06-05 05:11:53,547 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 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 05:11:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:53,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:53,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:53,661 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 05:11:53,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:53,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:53,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:53,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-05 05:11:53,848 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 05:11:53,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189467145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:53,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:53,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:53,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469362070] [2021-06-05 05:11:53,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:53,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:53,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:53,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:53,850 INFO L87 Difference]: Start difference. First operand 2209 states and 9475 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:54,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:54,474 INFO L93 Difference]: Finished difference Result 3033 states and 12436 transitions. [2021-06-05 05:11:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:11:54,474 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:54,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:54,481 INFO L225 Difference]: With dead ends: 3033 [2021-06-05 05:11:54,481 INFO L226 Difference]: Without dead ends: 2989 [2021-06-05 05:11:54,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 562.7ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:11:54,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2021-06-05 05:11:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2226. [2021-06-05 05:11:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 4.273707865168539) internal successors, (9509), 2225 states have internal predecessors, (9509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 9509 transitions. [2021-06-05 05:11:54,524 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 9509 transitions. Word has length 29 [2021-06-05 05:11:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:54,524 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 9509 transitions. [2021-06-05 05:11:54,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 9509 transitions. [2021-06-05 05:11:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:54,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:54,527 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] [2021-06-05 05:11:54,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 05:11:54,729 INFO L430 AbstractCegarLoop]: === Iteration 39 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:54,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:54,729 INFO L82 PathProgramCache]: Analyzing trace with hash -528193044, now seen corresponding path program 32 times [2021-06-05 05:11:54,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:54,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979814869] [2021-06-05 05:11:54,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:54,828 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 05:11:54,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:54,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979814869] [2021-06-05 05:11:54,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979814869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:54,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640707400] [2021-06-05 05:11:54,829 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 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 05:11:54,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:54,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:54,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:54,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:54,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:54,928 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 05:11:54,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:54,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:54,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:54,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:11:55,062 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 05:11:55,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640707400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:55,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:55,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:55,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270872027] [2021-06-05 05:11:55,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:55,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:55,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:55,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:55,063 INFO L87 Difference]: Start difference. First operand 2226 states and 9509 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:55,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:55,716 INFO L93 Difference]: Finished difference Result 2675 states and 11138 transitions. [2021-06-05 05:11:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:11:55,716 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:55,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:55,738 INFO L225 Difference]: With dead ends: 2675 [2021-06-05 05:11:55,739 INFO L226 Difference]: Without dead ends: 2657 [2021-06-05 05:11:55,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 578.2ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:11:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-06-05 05:11:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2219. [2021-06-05 05:11:55,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 2218 states have (on average 4.278629395852119) internal successors, (9490), 2218 states have internal predecessors, (9490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:55,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 9490 transitions. [2021-06-05 05:11:55,771 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 9490 transitions. Word has length 29 [2021-06-05 05:11:55,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:55,771 INFO L482 AbstractCegarLoop]: Abstraction has 2219 states and 9490 transitions. [2021-06-05 05:11:55,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 9490 transitions. [2021-06-05 05:11:55,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:55,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:55,775 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] [2021-06-05 05:11:55,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 05:11:55,975 INFO L430 AbstractCegarLoop]: === Iteration 40 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:55,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:55,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1086813878, now seen corresponding path program 33 times [2021-06-05 05:11:55,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:55,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151741923] [2021-06-05 05:11:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:56,078 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 05:11:56,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:56,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151741923] [2021-06-05 05:11:56,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151741923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:56,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131055242] [2021-06-05 05:11:56,079 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 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 05:11:56,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:11:56,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:56,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:56,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:56,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:56,188 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 05:11:56,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:56,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:56,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:56,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:11:56,329 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 05:11:56,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131055242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:56,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:56,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:56,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547374571] [2021-06-05 05:11:56,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:56,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:56,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:56,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:56,330 INFO L87 Difference]: Start difference. First operand 2219 states and 9490 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:57,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:57,016 INFO L93 Difference]: Finished difference Result 2647 states and 11081 transitions. [2021-06-05 05:11:57,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:11:57,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:57,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:57,022 INFO L225 Difference]: With dead ends: 2647 [2021-06-05 05:11:57,022 INFO L226 Difference]: Without dead ends: 2608 [2021-06-05 05:11:57,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 647.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:11:57,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-05 05:11:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2163. [2021-06-05 05:11:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.279833487511564) internal successors, (9253), 2162 states have internal predecessors, (9253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 9253 transitions. [2021-06-05 05:11:57,054 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 9253 transitions. Word has length 29 [2021-06-05 05:11:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:57,054 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 9253 transitions. [2021-06-05 05:11:57,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:57,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 9253 transitions. [2021-06-05 05:11:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:57,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:57,059 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] [2021-06-05 05:11:57,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 05:11:57,279 INFO L430 AbstractCegarLoop]: === Iteration 41 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:57,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:57,280 INFO L82 PathProgramCache]: Analyzing trace with hash 356160112, now seen corresponding path program 34 times [2021-06-05 05:11:57,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:57,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020181743] [2021-06-05 05:11:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:57,392 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 05:11:57,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:57,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020181743] [2021-06-05 05:11:57,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020181743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:57,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787951431] [2021-06-05 05:11:57,392 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 05:11:57,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:57,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:57,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:57,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:57,485 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 05:11:57,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:57,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:57,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:57,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-05 05:11:57,630 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 05:11:57,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787951431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:57,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:57,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:11:57,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285593897] [2021-06-05 05:11:57,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:57,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:57,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:57,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:57,631 INFO L87 Difference]: Start difference. First operand 2163 states and 9253 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:58,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:58,396 INFO L93 Difference]: Finished difference Result 2735 states and 11521 transitions. [2021-06-05 05:11:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:11:58,396 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:58,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:58,402 INFO L225 Difference]: With dead ends: 2735 [2021-06-05 05:11:58,402 INFO L226 Difference]: Without dead ends: 2695 [2021-06-05 05:11:58,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 638.0ms TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:11:58,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-06-05 05:11:58,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2163. [2021-06-05 05:11:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.277983348751157) internal successors, (9249), 2162 states have internal predecessors, (9249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:58,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 9249 transitions. [2021-06-05 05:11:58,447 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 9249 transitions. Word has length 29 [2021-06-05 05:11:58,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:58,447 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 9249 transitions. [2021-06-05 05:11:58,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:58,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 9249 transitions. [2021-06-05 05:11:58,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:58,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:58,451 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] [2021-06-05 05:11:58,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:58,663 INFO L430 AbstractCegarLoop]: === Iteration 42 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:58,664 INFO L82 PathProgramCache]: Analyzing trace with hash -207437312, now seen corresponding path program 35 times [2021-06-05 05:11:58,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:58,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70291691] [2021-06-05 05:11:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:58,770 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 05:11:58,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:58,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70291691] [2021-06-05 05:11:58,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70291691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:58,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973219153] [2021-06-05 05:11:58,771 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 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 05:11:58,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:11:58,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:58,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:58,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:58,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:11:58,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:58,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:58,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:58,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:11:58,968 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 05:11:58,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973219153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:58,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:58,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 05:11:58,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153987821] [2021-06-05 05:11:58,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:11:58,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:58,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:11:58,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:11:58,969 INFO L87 Difference]: Start difference. First operand 2163 states and 9249 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:59,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:59,513 INFO L93 Difference]: Finished difference Result 2788 states and 11737 transitions. [2021-06-05 05:11:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:11:59,513 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:11:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:59,519 INFO L225 Difference]: With dead ends: 2788 [2021-06-05 05:11:59,519 INFO L226 Difference]: Without dead ends: 2765 [2021-06-05 05:11:59,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 456.3ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:11:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2021-06-05 05:11:59,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2163. [2021-06-05 05:11:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.277983348751157) internal successors, (9249), 2162 states have internal predecessors, (9249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 9249 transitions. [2021-06-05 05:11:59,550 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 9249 transitions. Word has length 29 [2021-06-05 05:11:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:59,550 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 9249 transitions. [2021-06-05 05:11:59,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 9249 transitions. [2021-06-05 05:11:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:11:59,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:59,553 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] [2021-06-05 05:11:59,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:59,753 INFO L430 AbstractCegarLoop]: === Iteration 43 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:59,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:59,754 INFO L82 PathProgramCache]: Analyzing trace with hash 828150992, now seen corresponding path program 1 times [2021-06-05 05:11:59,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:59,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959222420] [2021-06-05 05:11:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:00,009 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 05:12:00,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:00,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959222420] [2021-06-05 05:12:00,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959222420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:00,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951539815] [2021-06-05 05:12:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:12:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:00,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:00,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:00,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:00,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:00,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:00,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:00,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 05:12:00,224 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 05:12:00,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951539815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:00,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:00,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 05:12:00,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998307306] [2021-06-05 05:12:00,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:12:00,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:00,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:12:00,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:00,225 INFO L87 Difference]: Start difference. First operand 2163 states and 9249 transitions. Second operand has 15 states, 15 states have (on average 3.0) 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 05:12:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:00,488 INFO L93 Difference]: Finished difference Result 2918 states and 12253 transitions. [2021-06-05 05:12:00,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:12:00,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) 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 29 [2021-06-05 05:12:00,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:00,497 INFO L225 Difference]: With dead ends: 2918 [2021-06-05 05:12:00,497 INFO L226 Difference]: Without dead ends: 2899 [2021-06-05 05:12:00,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 346.5ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:00,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-06-05 05:12:00,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2351. [2021-06-05 05:12:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 4.279148936170213) internal successors, (10056), 2350 states have internal predecessors, (10056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 10056 transitions. [2021-06-05 05:12:00,549 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 10056 transitions. Word has length 29 [2021-06-05 05:12:00,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:00,549 INFO L482 AbstractCegarLoop]: Abstraction has 2351 states and 10056 transitions. [2021-06-05 05:12:00,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) 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 05:12:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 10056 transitions. [2021-06-05 05:12:00,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:00,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:00,553 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] [2021-06-05 05:12:00,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:00,753 INFO L430 AbstractCegarLoop]: === Iteration 44 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:00,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:00,754 INFO L82 PathProgramCache]: Analyzing trace with hash -2044461478, now seen corresponding path program 2 times [2021-06-05 05:12:00,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:00,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508190975] [2021-06-05 05:12:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:00,939 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 05:12:00,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:00,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508190975] [2021-06-05 05:12:00,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508190975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:00,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663783291] [2021-06-05 05:12:00,940 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 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 05:12:00,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:00,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:00,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:00,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:01,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:01,071 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 13 treesize of output 17 [2021-06-05 05:12:01,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:01,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:01,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:01,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 05:12:01,210 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 05:12:01,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663783291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:01,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:01,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:01,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304699170] [2021-06-05 05:12:01,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:01,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:01,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:01,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:01,211 INFO L87 Difference]: Start difference. First operand 2351 states and 10056 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:01,648 INFO L93 Difference]: Finished difference Result 2782 states and 11686 transitions. [2021-06-05 05:12:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:12:01,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:01,654 INFO L225 Difference]: With dead ends: 2782 [2021-06-05 05:12:01,654 INFO L226 Difference]: Without dead ends: 2769 [2021-06-05 05:12:01,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 524.4ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:12:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-06-05 05:12:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 2342. [2021-06-05 05:12:01,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 4.282785134557881) internal successors, (10026), 2341 states have internal predecessors, (10026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:01,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 10026 transitions. [2021-06-05 05:12:01,709 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 10026 transitions. Word has length 29 [2021-06-05 05:12:01,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:01,710 INFO L482 AbstractCegarLoop]: Abstraction has 2342 states and 10026 transitions. [2021-06-05 05:12:01,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:01,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 10026 transitions. [2021-06-05 05:12:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:01,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:01,714 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, 1, 1, 1] [2021-06-05 05:12:01,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 05:12:01,933 INFO L430 AbstractCegarLoop]: === Iteration 45 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:01,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1805403798, now seen corresponding path program 3 times [2021-06-05 05:12:01,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:01,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926847495] [2021-06-05 05:12:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:02,133 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 05:12:02,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:02,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926847495] [2021-06-05 05:12:02,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926847495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:02,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244845951] [2021-06-05 05:12:02,134 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 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 05:12:02,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:12:02,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:02,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:02,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:02,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:02,259 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 13 treesize of output 17 [2021-06-05 05:12:02,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:02,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:02,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:02,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 05:12:02,432 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 05:12:02,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244845951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:02,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:02,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:02,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62499404] [2021-06-05 05:12:02,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:02,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:02,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:02,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:02,433 INFO L87 Difference]: Start difference. First operand 2342 states and 10026 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:03,107 INFO L93 Difference]: Finished difference Result 2795 states and 11675 transitions. [2021-06-05 05:12:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:12:03,108 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:03,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:03,113 INFO L225 Difference]: With dead ends: 2795 [2021-06-05 05:12:03,113 INFO L226 Difference]: Without dead ends: 2780 [2021-06-05 05:12:03,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 727.6ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:12:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2021-06-05 05:12:03,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2349. [2021-06-05 05:12:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 4.2789608177172065) internal successors, (10047), 2348 states have internal predecessors, (10047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 10047 transitions. [2021-06-05 05:12:03,149 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 10047 transitions. Word has length 29 [2021-06-05 05:12:03,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:03,149 INFO L482 AbstractCegarLoop]: Abstraction has 2349 states and 10047 transitions. [2021-06-05 05:12:03,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:03,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 10047 transitions. [2021-06-05 05:12:03,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:03,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:03,153 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] [2021-06-05 05:12:03,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:03,353 INFO L430 AbstractCegarLoop]: === Iteration 46 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:03,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:03,354 INFO L82 PathProgramCache]: Analyzing trace with hash 24805496, now seen corresponding path program 4 times [2021-06-05 05:12:03,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:03,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478455676] [2021-06-05 05:12:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:03,540 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 05:12:03,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:03,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478455676] [2021-06-05 05:12:03,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478455676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:03,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057948645] [2021-06-05 05:12:03,540 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 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 05:12:03,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:03,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:03,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:03,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:03,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:03,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:03,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:03,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:03,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 05:12:03,748 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 05:12:03,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057948645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:03,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:03,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 05:12:03,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207541070] [2021-06-05 05:12:03,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:12:03,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:03,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:12:03,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:03,749 INFO L87 Difference]: Start difference. First operand 2349 states and 10047 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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 05:12:03,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:03,971 INFO L93 Difference]: Finished difference Result 2946 states and 12322 transitions. [2021-06-05 05:12:03,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:12:03,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 29 [2021-06-05 05:12:03,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:03,977 INFO L225 Difference]: With dead ends: 2946 [2021-06-05 05:12:03,977 INFO L226 Difference]: Without dead ends: 2915 [2021-06-05 05:12:03,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:03,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2021-06-05 05:12:04,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 2313. [2021-06-05 05:12:04,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 4.285899653979238) internal successors, (9909), 2312 states have internal predecessors, (9909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 9909 transitions. [2021-06-05 05:12:04,011 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 9909 transitions. Word has length 29 [2021-06-05 05:12:04,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:04,011 INFO L482 AbstractCegarLoop]: Abstraction has 2313 states and 9909 transitions. [2021-06-05 05:12:04,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) 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 05:12:04,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 9909 transitions. [2021-06-05 05:12:04,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:04,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:04,014 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] [2021-06-05 05:12:04,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:04,215 INFO L430 AbstractCegarLoop]: === Iteration 47 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:04,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:04,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2005583254, now seen corresponding path program 5 times [2021-06-05 05:12:04,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:04,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319395977] [2021-06-05 05:12:04,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:04,411 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 05:12:04,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:04,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319395977] [2021-06-05 05:12:04,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319395977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:04,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213208866] [2021-06-05 05:12:04,412 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 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 05:12:04,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:04,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:04,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:12:04,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:04,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 05:12:04,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:04,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:04,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:04,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:12 [2021-06-05 05:12:04,601 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 05:12:04,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213208866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:04,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:04,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 05:12:04,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293098108] [2021-06-05 05:12:04,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:12:04,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:04,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:12:04,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:04,602 INFO L87 Difference]: Start difference. First operand 2313 states and 9909 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:04,923 INFO L93 Difference]: Finished difference Result 2525 states and 10682 transitions. [2021-06-05 05:12:04,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:04,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:04,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:04,929 INFO L225 Difference]: With dead ends: 2525 [2021-06-05 05:12:04,929 INFO L226 Difference]: Without dead ends: 2510 [2021-06-05 05:12:04,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:04,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-06-05 05:12:04,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2301. [2021-06-05 05:12:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 4.288260869565217) internal successors, (9863), 2300 states have internal predecessors, (9863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 9863 transitions. [2021-06-05 05:12:04,961 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 9863 transitions. Word has length 29 [2021-06-05 05:12:04,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:04,961 INFO L482 AbstractCegarLoop]: Abstraction has 2301 states and 9863 transitions. [2021-06-05 05:12:04,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 9863 transitions. [2021-06-05 05:12:04,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:04,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:04,965 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] [2021-06-05 05:12:05,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 05:12:05,165 INFO L430 AbstractCegarLoop]: === Iteration 48 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:05,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:05,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1642415852, now seen corresponding path program 6 times [2021-06-05 05:12:05,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:05,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224444162] [2021-06-05 05:12:05,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:05,363 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 05:12:05,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:05,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224444162] [2021-06-05 05:12:05,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224444162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:05,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654047975] [2021-06-05 05:12:05,363 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 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 05:12:05,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:12:05,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:05,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:05,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:05,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:05,515 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 15 treesize of output 19 [2021-06-05 05:12:05,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:05,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:05,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:05,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-05 05:12:05,604 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 05:12:05,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654047975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:05,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:05,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:05,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106047628] [2021-06-05 05:12:05,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:05,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:05,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:05,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:05,605 INFO L87 Difference]: Start difference. First operand 2301 states and 9863 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:06,047 INFO L93 Difference]: Finished difference Result 2395 states and 10165 transitions. [2021-06-05 05:12:06,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:12:06,048 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:06,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:06,052 INFO L225 Difference]: With dead ends: 2395 [2021-06-05 05:12:06,053 INFO L226 Difference]: Without dead ends: 2380 [2021-06-05 05:12:06,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 495.7ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:12:06,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-06-05 05:12:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2295. [2021-06-05 05:12:06,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2294 states have (on average 4.291194420226678) internal successors, (9844), 2294 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 9844 transitions. [2021-06-05 05:12:06,085 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 9844 transitions. Word has length 29 [2021-06-05 05:12:06,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:06,085 INFO L482 AbstractCegarLoop]: Abstraction has 2295 states and 9844 transitions. [2021-06-05 05:12:06,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 9844 transitions. [2021-06-05 05:12:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:06,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:06,088 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] [2021-06-05 05:12:06,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 05:12:06,289 INFO L430 AbstractCegarLoop]: === Iteration 49 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:06,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:06,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1042410156, now seen corresponding path program 7 times [2021-06-05 05:12:06,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:06,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334693640] [2021-06-05 05:12:06,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:06,471 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 05:12:06,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:06,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334693640] [2021-06-05 05:12:06,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334693640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:06,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448558972] [2021-06-05 05:12:06,471 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 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 05:12:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:06,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:06,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:06,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:06,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:06,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:06,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:06,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 05:12:06,652 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 05:12:06,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448558972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:06,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:06,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 05:12:06,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43984376] [2021-06-05 05:12:06,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:12:06,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:06,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:12:06,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:06,653 INFO L87 Difference]: Start difference. First operand 2295 states and 9844 transitions. Second operand has 15 states, 15 states have (on average 3.0) 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 05:12:06,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:06,836 INFO L93 Difference]: Finished difference Result 2879 states and 12153 transitions. [2021-06-05 05:12:06,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:06,837 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) 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 29 [2021-06-05 05:12:06,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:06,844 INFO L225 Difference]: With dead ends: 2879 [2021-06-05 05:12:06,844 INFO L226 Difference]: Without dead ends: 2860 [2021-06-05 05:12:06,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-06-05 05:12:06,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2414. [2021-06-05 05:12:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.290509738914214) internal successors, (10353), 2413 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 10353 transitions. [2021-06-05 05:12:06,896 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 10353 transitions. Word has length 29 [2021-06-05 05:12:06,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:06,896 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 10353 transitions. [2021-06-05 05:12:06,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) 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 05:12:06,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 10353 transitions. [2021-06-05 05:12:06,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:06,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:06,901 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] [2021-06-05 05:12:07,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 05:12:07,125 INFO L430 AbstractCegarLoop]: === Iteration 50 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:07,125 INFO L82 PathProgramCache]: Analyzing trace with hash 379944670, now seen corresponding path program 8 times [2021-06-05 05:12:07,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:07,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002403632] [2021-06-05 05:12:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:07,287 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 05:12:07,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:07,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002403632] [2021-06-05 05:12:07,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002403632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:07,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011110782] [2021-06-05 05:12:07,287 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 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 05:12:07,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:07,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:07,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:07,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:07,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:07,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:12:07,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:07,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:07,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:07,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:07,560 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 05:12:07,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011110782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:07,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:07,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:07,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174393664] [2021-06-05 05:12:07,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:07,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:07,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:07,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:07,561 INFO L87 Difference]: Start difference. First operand 2414 states and 10353 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:08,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:08,067 INFO L93 Difference]: Finished difference Result 2775 states and 11682 transitions. [2021-06-05 05:12:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:12:08,068 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:08,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:08,073 INFO L225 Difference]: With dead ends: 2775 [2021-06-05 05:12:08,073 INFO L226 Difference]: Without dead ends: 2762 [2021-06-05 05:12:08,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 507.8ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:12:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2021-06-05 05:12:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 2405. [2021-06-05 05:12:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2404 states have (on average 4.294093178036606) internal successors, (10323), 2404 states have internal predecessors, (10323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 10323 transitions. [2021-06-05 05:12:08,108 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 10323 transitions. Word has length 29 [2021-06-05 05:12:08,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:08,108 INFO L482 AbstractCegarLoop]: Abstraction has 2405 states and 10323 transitions. [2021-06-05 05:12:08,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 10323 transitions. [2021-06-05 05:12:08,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:08,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:08,112 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] [2021-06-05 05:12:08,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:08,313 INFO L430 AbstractCegarLoop]: === Iteration 51 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:08,313 INFO L82 PathProgramCache]: Analyzing trace with hash -65157350, now seen corresponding path program 9 times [2021-06-05 05:12:08,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:08,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81540148] [2021-06-05 05:12:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:08,459 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 05:12:08,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:08,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81540148] [2021-06-05 05:12:08,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81540148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:08,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099712288] [2021-06-05 05:12:08,460 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 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 05:12:08,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:12:08,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:08,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:08,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:08,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:08,568 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 05:12:08,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:08,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:08,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:08,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:08,730 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 05:12:08,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099712288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:08,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:08,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:08,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734749755] [2021-06-05 05:12:08,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:08,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:08,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:08,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:08,732 INFO L87 Difference]: Start difference. First operand 2405 states and 10323 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:09,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:09,511 INFO L93 Difference]: Finished difference Result 2803 states and 11726 transitions. [2021-06-05 05:12:09,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:12:09,512 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:09,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:09,518 INFO L225 Difference]: With dead ends: 2803 [2021-06-05 05:12:09,518 INFO L226 Difference]: Without dead ends: 2788 [2021-06-05 05:12:09,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 742.8ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:12:09,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2788 states. [2021-06-05 05:12:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2788 to 2412. [2021-06-05 05:12:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 4.290335960182497) internal successors, (10344), 2411 states have internal predecessors, (10344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 10344 transitions. [2021-06-05 05:12:09,577 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 10344 transitions. Word has length 29 [2021-06-05 05:12:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:09,577 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 10344 transitions. [2021-06-05 05:12:09,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:09,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 10344 transitions. [2021-06-05 05:12:09,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:09,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:09,581 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] [2021-06-05 05:12:09,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:09,782 INFO L430 AbstractCegarLoop]: === Iteration 52 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:09,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:09,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1845755652, now seen corresponding path program 10 times [2021-06-05 05:12:09,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:09,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150329261] [2021-06-05 05:12:09,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:09,928 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 05:12:09,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:09,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150329261] [2021-06-05 05:12:09,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150329261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:09,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136259486] [2021-06-05 05:12:09,928 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 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 05:12:09,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:09,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:09,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:09,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:10,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:10,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:10,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:10,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:10,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 05:12:10,109 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 05:12:10,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136259486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:10,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:10,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 05:12:10,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114416196] [2021-06-05 05:12:10,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:12:10,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:10,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:12:10,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:10,110 INFO L87 Difference]: Start difference. First operand 2412 states and 10344 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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 05:12:10,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:10,316 INFO L93 Difference]: Finished difference Result 2907 states and 12222 transitions. [2021-06-05 05:12:10,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:10,317 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 29 [2021-06-05 05:12:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:10,323 INFO L225 Difference]: With dead ends: 2907 [2021-06-05 05:12:10,323 INFO L226 Difference]: Without dead ends: 2876 [2021-06-05 05:12:10,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:10,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-05 05:12:10,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2334. [2021-06-05 05:12:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 4.294470638662666) internal successors, (10019), 2333 states have internal predecessors, (10019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 10019 transitions. [2021-06-05 05:12:10,359 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 10019 transitions. Word has length 29 [2021-06-05 05:12:10,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:10,360 INFO L482 AbstractCegarLoop]: Abstraction has 2334 states and 10019 transitions. [2021-06-05 05:12:10,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) 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 05:12:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 10019 transitions. [2021-06-05 05:12:10,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:10,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:10,363 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] [2021-06-05 05:12:10,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:10,563 INFO L430 AbstractCegarLoop]: === Iteration 53 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:10,564 INFO L82 PathProgramCache]: Analyzing trace with hash 418822894, now seen corresponding path program 11 times [2021-06-05 05:12:10,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:10,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219155676] [2021-06-05 05:12:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:10,712 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 05:12:10,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:10,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219155676] [2021-06-05 05:12:10,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219155676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:10,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041953977] [2021-06-05 05:12:10,712 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 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 05:12:10,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:10,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:10,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:10,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:10,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:10,811 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 13 treesize of output 7 [2021-06-05 05:12:10,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:10,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:10,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:10,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 05:12:10,927 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 05:12:10,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041953977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:10,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:10,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 05:12:10,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740476453] [2021-06-05 05:12:10,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:12:10,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:10,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:12:10,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:10,929 INFO L87 Difference]: Start difference. First operand 2334 states and 10019 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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 05:12:11,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:11,137 INFO L93 Difference]: Finished difference Result 2453 states and 10448 transitions. [2021-06-05 05:12:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:11,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 29 [2021-06-05 05:12:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:11,142 INFO L225 Difference]: With dead ends: 2453 [2021-06-05 05:12:11,142 INFO L226 Difference]: Without dead ends: 2438 [2021-06-05 05:12:11,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 234.8ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-06-05 05:12:11,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2304. [2021-06-05 05:12:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 4.291359096830221) internal successors, (9883), 2303 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 9883 transitions. [2021-06-05 05:12:11,171 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 9883 transitions. Word has length 29 [2021-06-05 05:12:11,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:11,171 INFO L482 AbstractCegarLoop]: Abstraction has 2304 states and 9883 transitions. [2021-06-05 05:12:11,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) 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 05:12:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 9883 transitions. [2021-06-05 05:12:11,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:11,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:11,175 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] [2021-06-05 05:12:11,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:11,375 INFO L430 AbstractCegarLoop]: === Iteration 54 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:11,375 INFO L82 PathProgramCache]: Analyzing trace with hash -945227760, now seen corresponding path program 12 times [2021-06-05 05:12:11,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:11,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666545711] [2021-06-05 05:12:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:11,518 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 05:12:11,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:11,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666545711] [2021-06-05 05:12:11,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666545711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:11,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270658723] [2021-06-05 05:12:11,519 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 05:12:11,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:12:11,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:11,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:11,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:11,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:11,627 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 05:12:11,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:11,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:11,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:11,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:11,795 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 05:12:11,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270658723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:11,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:11,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:12:11,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728402615] [2021-06-05 05:12:11,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:12:11,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:11,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:12:11,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:11,796 INFO L87 Difference]: Start difference. First operand 2304 states and 9883 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:12,408 INFO L93 Difference]: Finished difference Result 2813 states and 11728 transitions. [2021-06-05 05:12:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:12:12,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:12,414 INFO L225 Difference]: With dead ends: 2813 [2021-06-05 05:12:12,414 INFO L226 Difference]: Without dead ends: 2794 [2021-06-05 05:12:12,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 580.7ms TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:12:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-06-05 05:12:12,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 2390. [2021-06-05 05:12:12,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 4.2951025533696106) internal successors, (10261), 2389 states have internal predecessors, (10261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:12,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 10261 transitions. [2021-06-05 05:12:12,453 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 10261 transitions. Word has length 29 [2021-06-05 05:12:12,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:12,453 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 10261 transitions. [2021-06-05 05:12:12,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:12,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 10261 transitions. [2021-06-05 05:12:12,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:12,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:12,457 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] [2021-06-05 05:12:12,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 05:12:12,671 INFO L430 AbstractCegarLoop]: === Iteration 55 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:12,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:12,671 INFO L82 PathProgramCache]: Analyzing trace with hash 477127066, now seen corresponding path program 13 times [2021-06-05 05:12:12,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:12,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150590723] [2021-06-05 05:12:12,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:12,815 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 05:12:12,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:12,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150590723] [2021-06-05 05:12:12,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150590723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:12,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436032975] [2021-06-05 05:12:12,815 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 05:12:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:12,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:12,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:12,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:12,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:12,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:12,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:12,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 05:12:13,009 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 05:12:13,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436032975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:13,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:13,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 05:12:13,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910046445] [2021-06-05 05:12:13,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:12:13,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:13,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:12:13,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:13,011 INFO L87 Difference]: Start difference. First operand 2390 states and 10261 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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 05:12:13,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:13,177 INFO L93 Difference]: Finished difference Result 2890 states and 12136 transitions. [2021-06-05 05:12:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:13,178 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 29 [2021-06-05 05:12:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:13,183 INFO L225 Difference]: With dead ends: 2890 [2021-06-05 05:12:13,183 INFO L226 Difference]: Without dead ends: 2875 [2021-06-05 05:12:13,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:13,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-06-05 05:12:13,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2409. [2021-06-05 05:12:13,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 4.284883720930233) internal successors, (10318), 2408 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 10318 transitions. [2021-06-05 05:12:13,219 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 10318 transitions. Word has length 29 [2021-06-05 05:12:13,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:13,219 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 10318 transitions. [2021-06-05 05:12:13,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) 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 05:12:13,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 10318 transitions. [2021-06-05 05:12:13,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:13,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:13,223 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] [2021-06-05 05:12:13,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:13,423 INFO L430 AbstractCegarLoop]: === Iteration 56 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:13,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:13,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1191266376, now seen corresponding path program 14 times [2021-06-05 05:12:13,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:13,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958690559] [2021-06-05 05:12:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:13,564 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 05:12:13,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:13,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958690559] [2021-06-05 05:12:13,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958690559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:13,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360935944] [2021-06-05 05:12:13,564 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 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 05:12:13,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:13,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:13,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:13,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:13,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:13,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:12:13,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:13,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:13,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:13,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:13,781 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 05:12:13,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360935944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:13,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:13,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:12:13,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965571764] [2021-06-05 05:12:13,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:12:13,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:13,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:12:13,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:13,782 INFO L87 Difference]: Start difference. First operand 2409 states and 10318 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 05:12:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:14,262 INFO L93 Difference]: Finished difference Result 2798 states and 11679 transitions. [2021-06-05 05:12:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:12:14,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 29 [2021-06-05 05:12:14,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:14,268 INFO L225 Difference]: With dead ends: 2798 [2021-06-05 05:12:14,268 INFO L226 Difference]: Without dead ends: 2784 [2021-06-05 05:12:14,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 468.9ms TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:12:14,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-06-05 05:12:14,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2400. [2021-06-05 05:12:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 4.2884535223009586) internal successors, (10288), 2399 states have internal predecessors, (10288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 10288 transitions. [2021-06-05 05:12:14,301 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 10288 transitions. Word has length 29 [2021-06-05 05:12:14,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:14,302 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 10288 transitions. [2021-06-05 05:12:14,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 05:12:14,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 10288 transitions. [2021-06-05 05:12:14,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:14,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:14,305 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, 1, 1, 1] [2021-06-05 05:12:14,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 05:12:14,507 INFO L430 AbstractCegarLoop]: === Iteration 57 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:14,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:14,507 INFO L82 PathProgramCache]: Analyzing trace with hash 878000598, now seen corresponding path program 15 times [2021-06-05 05:12:14,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:14,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282791493] [2021-06-05 05:12:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:14,663 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 05:12:14,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:14,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282791493] [2021-06-05 05:12:14,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282791493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:14,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31534406] [2021-06-05 05:12:14,664 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 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 05:12:14,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:12:14,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:14,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:14,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:14,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:14,756 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 05:12:14,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:14,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:14,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:14,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:14,892 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 05:12:14,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31534406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:14,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:14,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:12:14,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520353435] [2021-06-05 05:12:14,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:12:14,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:14,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:12:14,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:14,893 INFO L87 Difference]: Start difference. First operand 2400 states and 10288 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 05:12:15,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:15,495 INFO L93 Difference]: Finished difference Result 2782 states and 11652 transitions. [2021-06-05 05:12:15,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:12:15,495 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 29 [2021-06-05 05:12:15,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:15,500 INFO L225 Difference]: With dead ends: 2782 [2021-06-05 05:12:15,501 INFO L226 Difference]: Without dead ends: 2759 [2021-06-05 05:12:15,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 550.2ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:12:15,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-06-05 05:12:15,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 2330. [2021-06-05 05:12:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 4.288535852297123) internal successors, (9988), 2329 states have internal predecessors, (9988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:15,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 9988 transitions. [2021-06-05 05:12:15,537 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 9988 transitions. Word has length 29 [2021-06-05 05:12:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:15,537 INFO L482 AbstractCegarLoop]: Abstraction has 2330 states and 9988 transitions. [2021-06-05 05:12:15,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 05:12:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 9988 transitions. [2021-06-05 05:12:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:15,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:15,541 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] [2021-06-05 05:12:15,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 05:12:15,757 INFO L430 AbstractCegarLoop]: === Iteration 58 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:15,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:15,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1598176080, now seen corresponding path program 16 times [2021-06-05 05:12:15,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:15,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286993041] [2021-06-05 05:12:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:15,917 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 05:12:15,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:15,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286993041] [2021-06-05 05:12:15,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286993041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:15,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172209627] [2021-06-05 05:12:15,918 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 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 05:12:15,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:15,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:15,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:15,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:16,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:16,011 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 13 treesize of output 7 [2021-06-05 05:12:16,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:16,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:16,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:16,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 05:12:16,114 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 05:12:16,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172209627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:16,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:16,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 05:12:16,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470845876] [2021-06-05 05:12:16,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:12:16,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:16,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:12:16,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:16,116 INFO L87 Difference]: Start difference. First operand 2330 states and 9988 transitions. Second operand has 15 states, 15 states have (on average 3.0) 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 05:12:16,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:16,335 INFO L93 Difference]: Finished difference Result 2462 states and 10428 transitions. [2021-06-05 05:12:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:16,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) 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 29 [2021-06-05 05:12:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:16,340 INFO L225 Difference]: With dead ends: 2462 [2021-06-05 05:12:16,340 INFO L226 Difference]: Without dead ends: 2443 [2021-06-05 05:12:16,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:16,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-06-05 05:12:16,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 2330. [2021-06-05 05:12:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 4.288535852297123) internal successors, (9988), 2329 states have internal predecessors, (9988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 9988 transitions. [2021-06-05 05:12:16,372 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 9988 transitions. Word has length 29 [2021-06-05 05:12:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:16,372 INFO L482 AbstractCegarLoop]: Abstraction has 2330 states and 9988 transitions. [2021-06-05 05:12:16,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) 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 05:12:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 9988 transitions. [2021-06-05 05:12:16,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:16,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:16,376 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] [2021-06-05 05:12:16,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:16,576 INFO L430 AbstractCegarLoop]: === Iteration 59 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:16,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1147156396, now seen corresponding path program 17 times [2021-06-05 05:12:16,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:16,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567598465] [2021-06-05 05:12:16,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:16,736 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 05:12:16,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:16,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567598465] [2021-06-05 05:12:16,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567598465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:16,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375641824] [2021-06-05 05:12:16,736 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 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 05:12:16,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:16,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:16,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:12:16,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:16,827 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 05:12:16,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:16,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:16,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:16,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:24 [2021-06-05 05:12:17,000 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 05:12:17,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375641824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:17,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:17,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 05:12:17,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878144792] [2021-06-05 05:12:17,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:12:17,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:17,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:12:17,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:17,001 INFO L87 Difference]: Start difference. First operand 2330 states and 9988 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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 05:12:17,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:17,248 INFO L93 Difference]: Finished difference Result 2897 states and 12146 transitions. [2021-06-05 05:12:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:17,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 29 [2021-06-05 05:12:17,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:17,254 INFO L225 Difference]: With dead ends: 2897 [2021-06-05 05:12:17,254 INFO L226 Difference]: Without dead ends: 2874 [2021-06-05 05:12:17,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 356.0ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-06-05 05:12:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 2325. [2021-06-05 05:12:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2324 states have (on average 4.291308089500861) internal successors, (9973), 2324 states have internal predecessors, (9973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:17,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 9973 transitions. [2021-06-05 05:12:17,288 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 9973 transitions. Word has length 29 [2021-06-05 05:12:17,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:17,288 INFO L482 AbstractCegarLoop]: Abstraction has 2325 states and 9973 transitions. [2021-06-05 05:12:17,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) 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 05:12:17,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 9973 transitions. [2021-06-05 05:12:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:17,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:17,291 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] [2021-06-05 05:12:17,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 05:12:17,492 INFO L430 AbstractCegarLoop]: === Iteration 60 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:17,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:17,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1345773056, now seen corresponding path program 18 times [2021-06-05 05:12:17,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:17,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650440507] [2021-06-05 05:12:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:17,584 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 05:12:17,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:17,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650440507] [2021-06-05 05:12:17,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650440507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:17,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723512154] [2021-06-05 05:12:17,584 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 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 05:12:17,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:12:17,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:17,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:12:17,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:17,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:17,677 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 05:12:17,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:17,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:17,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:17,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 05:12:17,807 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 05:12:17,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723512154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:17,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:17,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 05:12:17,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712258077] [2021-06-05 05:12:17,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:12:17,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:17,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:12:17,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:17,808 INFO L87 Difference]: Start difference. First operand 2325 states and 9973 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:18,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:18,521 INFO L93 Difference]: Finished difference Result 3209 states and 13477 transitions. [2021-06-05 05:12:18,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:12:18,521 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:18,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:18,528 INFO L225 Difference]: With dead ends: 3209 [2021-06-05 05:12:18,528 INFO L226 Difference]: Without dead ends: 3190 [2021-06-05 05:12:18,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 613.8ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:12:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-06-05 05:12:18,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2447. [2021-06-05 05:12:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2446 states have (on average 4.289452166802944) internal successors, (10492), 2446 states have internal predecessors, (10492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 10492 transitions. [2021-06-05 05:12:18,562 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 10492 transitions. Word has length 29 [2021-06-05 05:12:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:18,562 INFO L482 AbstractCegarLoop]: Abstraction has 2447 states and 10492 transitions. [2021-06-05 05:12:18,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 10492 transitions. [2021-06-05 05:12:18,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:18,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:18,566 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] [2021-06-05 05:12:18,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:18,766 INFO L430 AbstractCegarLoop]: === Iteration 61 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:18,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:18,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1526839414, now seen corresponding path program 19 times [2021-06-05 05:12:18,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:18,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555784034] [2021-06-05 05:12:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:18,850 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 05:12:18,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:18,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555784034] [2021-06-05 05:12:18,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555784034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:18,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540735255] [2021-06-05 05:12:18,850 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 05:12:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:18,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:18,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:18,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:18,924 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 13 treesize of output 7 [2021-06-05 05:12:18,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:18,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:18,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:18,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 05:12:19,004 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 05:12:19,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540735255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:19,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:19,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:12:19,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071629685] [2021-06-05 05:12:19,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:19,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:19,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:19,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:19,005 INFO L87 Difference]: Start difference. First operand 2447 states and 10492 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 05:12:19,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:19,159 INFO L93 Difference]: Finished difference Result 2901 states and 12201 transitions. [2021-06-05 05:12:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 29 [2021-06-05 05:12:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:19,165 INFO L225 Difference]: With dead ends: 2901 [2021-06-05 05:12:19,165 INFO L226 Difference]: Without dead ends: 2870 [2021-06-05 05:12:19,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:19,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-06-05 05:12:19,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2384. [2021-06-05 05:12:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 4.303399076793958) internal successors, (10255), 2383 states have internal predecessors, (10255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:19,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 10255 transitions. [2021-06-05 05:12:19,198 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 10255 transitions. Word has length 29 [2021-06-05 05:12:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:19,199 INFO L482 AbstractCegarLoop]: Abstraction has 2384 states and 10255 transitions. [2021-06-05 05:12:19,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 05:12:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 10255 transitions. [2021-06-05 05:12:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:19,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:19,202 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] [2021-06-05 05:12:19,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 05:12:19,403 INFO L430 AbstractCegarLoop]: === Iteration 62 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:19,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:19,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1487961190, now seen corresponding path program 20 times [2021-06-05 05:12:19,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:19,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275489926] [2021-06-05 05:12:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:19,553 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 05:12:19,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:19,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275489926] [2021-06-05 05:12:19,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275489926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:19,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144140978] [2021-06-05 05:12:19,553 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 05:12:19,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:19,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:19,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:19,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:19,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:19,655 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 05:12:19,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:19,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:19,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:19,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:19,815 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 05:12:19,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144140978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:19,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:19,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 05:12:19,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756720676] [2021-06-05 05:12:19,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:12:19,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:19,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:12:19,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:19,816 INFO L87 Difference]: Start difference. First operand 2384 states and 10255 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:20,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:20,309 INFO L93 Difference]: Finished difference Result 2549 states and 10861 transitions. [2021-06-05 05:12:20,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:12:20,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:20,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:20,314 INFO L225 Difference]: With dead ends: 2549 [2021-06-05 05:12:20,315 INFO L226 Difference]: Without dead ends: 2534 [2021-06-05 05:12:20,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 411.2ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:12:20,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-06-05 05:12:20,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2369. [2021-06-05 05:12:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 4.307010135135135) internal successors, (10199), 2368 states have internal predecessors, (10199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 10199 transitions. [2021-06-05 05:12:20,347 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 10199 transitions. Word has length 29 [2021-06-05 05:12:20,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:20,347 INFO L482 AbstractCegarLoop]: Abstraction has 2369 states and 10199 transitions. [2021-06-05 05:12:20,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:20,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 10199 transitions. [2021-06-05 05:12:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:20,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:20,351 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] [2021-06-05 05:12:20,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:20,552 INFO L430 AbstractCegarLoop]: === Iteration 63 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:20,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:20,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1442955452, now seen corresponding path program 21 times [2021-06-05 05:12:20,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:20,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35437320] [2021-06-05 05:12:20,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:20,665 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 05:12:20,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:20,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35437320] [2021-06-05 05:12:20,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35437320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:20,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589086141] [2021-06-05 05:12:20,666 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 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 05:12:20,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:20,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:20,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:12:20,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:20,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:20,766 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 05:12:20,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:20,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:20,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:20,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 05:12:20,889 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 05:12:20,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589086141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:20,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:20,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 05:12:20,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689720318] [2021-06-05 05:12:20,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:12:20,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:20,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:12:20,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:20,890 INFO L87 Difference]: Start difference. First operand 2369 states and 10199 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:21,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:21,567 INFO L93 Difference]: Finished difference Result 3298 states and 13754 transitions. [2021-06-05 05:12:21,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:12:21,567 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:21,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:21,574 INFO L225 Difference]: With dead ends: 3298 [2021-06-05 05:12:21,574 INFO L226 Difference]: Without dead ends: 3279 [2021-06-05 05:12:21,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 564.2ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:12:21,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-06-05 05:12:21,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2473. [2021-06-05 05:12:21,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 4.303398058252427) internal successors, (10638), 2472 states have internal predecessors, (10638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:21,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 10638 transitions. [2021-06-05 05:12:21,609 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 10638 transitions. Word has length 29 [2021-06-05 05:12:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:21,609 INFO L482 AbstractCegarLoop]: Abstraction has 2473 states and 10638 transitions. [2021-06-05 05:12:21,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:21,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 10638 transitions. [2021-06-05 05:12:21,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:21,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:21,612 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] [2021-06-05 05:12:21,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 05:12:21,813 INFO L430 AbstractCegarLoop]: === Iteration 64 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:21,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:21,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1429657018, now seen corresponding path program 22 times [2021-06-05 05:12:21,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:21,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137949988] [2021-06-05 05:12:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:21,911 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 05:12:21,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:21,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137949988] [2021-06-05 05:12:21,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137949988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:21,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936803792] [2021-06-05 05:12:21,912 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 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 05:12:21,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:21,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:21,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:21,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:22,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:22,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:22,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:22,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:22,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 05:12:22,090 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 05:12:22,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936803792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:22,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:22,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:12:22,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147319656] [2021-06-05 05:12:22,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:22,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:22,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:22,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:22,091 INFO L87 Difference]: Start difference. First operand 2473 states and 10638 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 05:12:22,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:22,233 INFO L93 Difference]: Finished difference Result 2928 states and 12339 transitions. [2021-06-05 05:12:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:22,234 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 29 [2021-06-05 05:12:22,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:22,240 INFO L225 Difference]: With dead ends: 2928 [2021-06-05 05:12:22,240 INFO L226 Difference]: Without dead ends: 2897 [2021-06-05 05:12:22,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-06-05 05:12:22,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2393. [2021-06-05 05:12:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 2392 states have (on average 4.306438127090301) internal successors, (10301), 2392 states have internal predecessors, (10301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 10301 transitions. [2021-06-05 05:12:22,293 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 10301 transitions. Word has length 29 [2021-06-05 05:12:22,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:22,293 INFO L482 AbstractCegarLoop]: Abstraction has 2393 states and 10301 transitions. [2021-06-05 05:12:22,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 05:12:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 10301 transitions. [2021-06-05 05:12:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:22,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:22,297 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] [2021-06-05 05:12:22,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:22,497 INFO L430 AbstractCegarLoop]: === Iteration 65 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:22,498 INFO L82 PathProgramCache]: Analyzing trace with hash -308608004, now seen corresponding path program 23 times [2021-06-05 05:12:22,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:22,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266958125] [2021-06-05 05:12:22,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:22,590 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 05:12:22,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:22,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266958125] [2021-06-05 05:12:22,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266958125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:22,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233470443] [2021-06-05 05:12:22,591 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 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 05:12:22,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:22,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:22,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:22,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:22,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:22,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:22,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:22,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 05:12:22,739 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 05:12:22,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233470443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:22,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:22,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 05:12:22,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59633330] [2021-06-05 05:12:22,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:12:22,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:22,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:12:22,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:12:22,740 INFO L87 Difference]: Start difference. First operand 2393 states and 10301 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 05:12:22,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:22,897 INFO L93 Difference]: Finished difference Result 2527 states and 10749 transitions. [2021-06-05 05:12:22,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:22,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 29 [2021-06-05 05:12:22,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:22,902 INFO L225 Difference]: With dead ends: 2527 [2021-06-05 05:12:22,902 INFO L226 Difference]: Without dead ends: 2508 [2021-06-05 05:12:22,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:22,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2021-06-05 05:12:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2381. [2021-06-05 05:12:22,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 4.310504201680672) internal successors, (10259), 2380 states have internal predecessors, (10259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 10259 transitions. [2021-06-05 05:12:22,935 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 10259 transitions. Word has length 29 [2021-06-05 05:12:22,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:22,936 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 10259 transitions. [2021-06-05 05:12:22,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 05:12:22,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 10259 transitions. [2021-06-05 05:12:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:22,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:22,939 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] [2021-06-05 05:12:23,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 05:12:23,140 INFO L430 AbstractCegarLoop]: === Iteration 66 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:23,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:23,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1817093934, now seen corresponding path program 24 times [2021-06-05 05:12:23,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:23,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631969673] [2021-06-05 05:12:23,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:23,225 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 05:12:23,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:23,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631969673] [2021-06-05 05:12:23,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631969673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:23,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209060660] [2021-06-05 05:12:23,225 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 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 05:12:23,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:12:23,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:23,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:12:23,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:23,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:23,318 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 13 treesize of output 17 [2021-06-05 05:12:23,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:23,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:23,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:23,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:17 [2021-06-05 05:12:23,421 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 05:12:23,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209060660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:23,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:23,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 05:12:23,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975866761] [2021-06-05 05:12:23,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:12:23,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:23,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:12:23,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:23,422 INFO L87 Difference]: Start difference. First operand 2381 states and 10259 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:24,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:24,185 INFO L93 Difference]: Finished difference Result 3454 states and 14369 transitions. [2021-06-05 05:12:24,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:12:24,186 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:24,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:24,193 INFO L225 Difference]: With dead ends: 3454 [2021-06-05 05:12:24,193 INFO L226 Difference]: Without dead ends: 3435 [2021-06-05 05:12:24,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 604.8ms TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:12:24,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2021-06-05 05:12:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2493. [2021-06-05 05:12:24,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2492 states have (on average 4.303370786516854) internal successors, (10724), 2492 states have internal predecessors, (10724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 10724 transitions. [2021-06-05 05:12:24,230 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 10724 transitions. Word has length 29 [2021-06-05 05:12:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:24,230 INFO L482 AbstractCegarLoop]: Abstraction has 2493 states and 10724 transitions. [2021-06-05 05:12:24,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 10724 transitions. [2021-06-05 05:12:24,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:24,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:24,233 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] [2021-06-05 05:12:24,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:24,437 INFO L430 AbstractCegarLoop]: === Iteration 67 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:24,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:24,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1055518536, now seen corresponding path program 25 times [2021-06-05 05:12:24,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:24,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156798864] [2021-06-05 05:12:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:24,531 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 05:12:24,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:24,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156798864] [2021-06-05 05:12:24,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156798864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:24,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260667346] [2021-06-05 05:12:24,532 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 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 05:12:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:24,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:24,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:24,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:24,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:24,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:24,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:24,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 05:12:24,721 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 05:12:24,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260667346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:24,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:24,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 05:12:24,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056290999] [2021-06-05 05:12:24,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:12:24,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:24,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:12:24,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:12:24,723 INFO L87 Difference]: Start difference. First operand 2493 states and 10724 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 05:12:24,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:24,934 INFO L93 Difference]: Finished difference Result 3036 states and 12792 transitions. [2021-06-05 05:12:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:12:24,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 29 [2021-06-05 05:12:24,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:24,942 INFO L225 Difference]: With dead ends: 3036 [2021-06-05 05:12:24,942 INFO L226 Difference]: Without dead ends: 3005 [2021-06-05 05:12:24,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-06-05 05:12:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2413. [2021-06-05 05:12:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 4.3063847429519075) internal successors, (10387), 2412 states have internal predecessors, (10387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 10387 transitions. [2021-06-05 05:12:24,990 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 10387 transitions. Word has length 29 [2021-06-05 05:12:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:24,990 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 10387 transitions. [2021-06-05 05:12:24,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 05:12:24,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 10387 transitions. [2021-06-05 05:12:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:24,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:24,993 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] [2021-06-05 05:12:25,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 05:12:25,199 INFO L430 AbstractCegarLoop]: === Iteration 68 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:25,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:25,199 INFO L82 PathProgramCache]: Analyzing trace with hash 65530478, now seen corresponding path program 26 times [2021-06-05 05:12:25,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:25,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063804785] [2021-06-05 05:12:25,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:25,286 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 05:12:25,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:25,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063804785] [2021-06-05 05:12:25,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063804785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:25,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341365563] [2021-06-05 05:12:25,287 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 05:12:25,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:25,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:25,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:25,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:25,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:25,431 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 13 treesize of output 17 [2021-06-05 05:12:25,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:25,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:25,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:25,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 05:12:25,550 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 05:12:25,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341365563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:25,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:25,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:12:25,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859425983] [2021-06-05 05:12:25,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:12:25,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:25,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:12:25,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:25,551 INFO L87 Difference]: Start difference. First operand 2413 states and 10387 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:26,133 INFO L93 Difference]: Finished difference Result 2675 states and 11277 transitions. [2021-06-05 05:12:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:12:26,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:26,138 INFO L225 Difference]: With dead ends: 2675 [2021-06-05 05:12:26,139 INFO L226 Difference]: Without dead ends: 2656 [2021-06-05 05:12:26,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 495.8ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:12:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-06-05 05:12:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2389. [2021-06-05 05:12:26,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 4.306951423785595) internal successors, (10285), 2388 states have internal predecessors, (10285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:26,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 10285 transitions. [2021-06-05 05:12:26,172 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 10285 transitions. Word has length 29 [2021-06-05 05:12:26,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:26,172 INFO L482 AbstractCegarLoop]: Abstraction has 2389 states and 10285 transitions. [2021-06-05 05:12:26,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:26,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 10285 transitions. [2021-06-05 05:12:26,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:26,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:26,175 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] [2021-06-05 05:12:26,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 05:12:26,375 INFO L430 AbstractCegarLoop]: === Iteration 69 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:26,376 INFO L82 PathProgramCache]: Analyzing trace with hash -2073834836, now seen corresponding path program 27 times [2021-06-05 05:12:26,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:26,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433548161] [2021-06-05 05:12:26,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:26,479 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 05:12:26,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:26,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433548161] [2021-06-05 05:12:26,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433548161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:26,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702299193] [2021-06-05 05:12:26,479 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 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 05:12:26,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:12:26,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:26,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:26,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:26,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:26,621 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 15 treesize of output 19 [2021-06-05 05:12:26,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:26,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:26,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:26,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-05 05:12:26,717 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 05:12:26,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702299193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:26,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:26,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:12:26,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000766078] [2021-06-05 05:12:26,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:12:26,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:26,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:12:26,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:26,718 INFO L87 Difference]: Start difference. First operand 2389 states and 10285 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:27,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:27,279 INFO L93 Difference]: Finished difference Result 2608 states and 11019 transitions. [2021-06-05 05:12:27,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:12:27,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:27,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:27,285 INFO L225 Difference]: With dead ends: 2608 [2021-06-05 05:12:27,285 INFO L226 Difference]: Without dead ends: 2589 [2021-06-05 05:12:27,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 502.8ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:12:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-06-05 05:12:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2392. [2021-06-05 05:12:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 4.303638644918444) internal successors, (10290), 2391 states have internal predecessors, (10290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 10290 transitions. [2021-06-05 05:12:27,317 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 10290 transitions. Word has length 29 [2021-06-05 05:12:27,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:27,317 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 10290 transitions. [2021-06-05 05:12:27,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:27,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 10290 transitions. [2021-06-05 05:12:27,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:27,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:27,321 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, 1, 1, 1] [2021-06-05 05:12:27,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 05:12:27,521 INFO L430 AbstractCegarLoop]: === Iteration 70 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:27,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:27,522 INFO L82 PathProgramCache]: Analyzing trace with hash -918912018, now seen corresponding path program 1 times [2021-06-05 05:12:27,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:27,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675946274] [2021-06-05 05:12:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:27,707 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 05:12:27,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:27,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675946274] [2021-06-05 05:12:27,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675946274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:27,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370251011] [2021-06-05 05:12:27,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:12:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:27,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:27,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:27,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:27,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:27,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:27,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:27,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-06-05 05:12:27,869 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 05:12:27,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370251011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:27,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:27,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 05:12:27,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531943314] [2021-06-05 05:12:27,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:12:27,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:27,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:12:27,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:27,870 INFO L87 Difference]: Start difference. First operand 2392 states and 10290 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:28,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:28,210 INFO L93 Difference]: Finished difference Result 2644 states and 11188 transitions. [2021-06-05 05:12:28,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:28,210 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:28,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:28,215 INFO L225 Difference]: With dead ends: 2644 [2021-06-05 05:12:28,215 INFO L226 Difference]: Without dead ends: 2625 [2021-06-05 05:12:28,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-06-05 05:12:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2494. [2021-06-05 05:12:28,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 4.292418772563177) internal successors, (10701), 2493 states have internal predecessors, (10701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 10701 transitions. [2021-06-05 05:12:28,248 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 10701 transitions. Word has length 29 [2021-06-05 05:12:28,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:28,248 INFO L482 AbstractCegarLoop]: Abstraction has 2494 states and 10701 transitions. [2021-06-05 05:12:28,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:28,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 10701 transitions. [2021-06-05 05:12:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:28,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:28,251 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] [2021-06-05 05:12:28,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:28,452 INFO L430 AbstractCegarLoop]: === Iteration 71 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:28,452 INFO L82 PathProgramCache]: Analyzing trace with hash -923682226, now seen corresponding path program 1 times [2021-06-05 05:12:28,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:28,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209719325] [2021-06-05 05:12:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:28,552 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 05:12:28,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:28,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209719325] [2021-06-05 05:12:28,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209719325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:28,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229851367] [2021-06-05 05:12:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:12:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:28,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:28,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:28,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:28,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:28,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:28,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:28,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-06-05 05:12:28,709 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 05:12:28,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229851367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:28,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:28,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 05:12:28,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99724994] [2021-06-05 05:12:28,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:28,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:28,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:28,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:28,710 INFO L87 Difference]: Start difference. First operand 2494 states and 10701 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 05:12:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:28,961 INFO L93 Difference]: Finished difference Result 2653 states and 11209 transitions. [2021-06-05 05:12:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:12:28,962 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 29 [2021-06-05 05:12:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:28,967 INFO L225 Difference]: With dead ends: 2653 [2021-06-05 05:12:28,967 INFO L226 Difference]: Without dead ends: 2634 [2021-06-05 05:12:28,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-06-05 05:12:28,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2496. [2021-06-05 05:12:28,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2495 states have (on average 4.292184368737475) internal successors, (10709), 2495 states have internal predecessors, (10709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:29,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 10709 transitions. [2021-06-05 05:12:29,000 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 10709 transitions. Word has length 29 [2021-06-05 05:12:29,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:29,000 INFO L482 AbstractCegarLoop]: Abstraction has 2496 states and 10709 transitions. [2021-06-05 05:12:29,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 05:12:29,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 10709 transitions. [2021-06-05 05:12:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:29,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:29,003 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] [2021-06-05 05:12:29,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:29,206 INFO L430 AbstractCegarLoop]: === Iteration 72 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:29,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:29,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1926683450, now seen corresponding path program 2 times [2021-06-05 05:12:29,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:29,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124008202] [2021-06-05 05:12:29,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:29,371 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 05:12:29,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:29,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124008202] [2021-06-05 05:12:29,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124008202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:29,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85803922] [2021-06-05 05:12:29,371 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 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 05:12:29,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:29,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:29,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:29,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:29,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:29,518 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 05:12:29,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:29,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:29,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:29,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 05:12:29,638 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 05:12:29,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85803922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:29,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:29,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:12:29,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461655905] [2021-06-05 05:12:29,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:12:29,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:29,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:12:29,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:29,639 INFO L87 Difference]: Start difference. First operand 2496 states and 10709 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:30,299 INFO L93 Difference]: Finished difference Result 2859 states and 12086 transitions. [2021-06-05 05:12:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:12:30,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:30,305 INFO L225 Difference]: With dead ends: 2859 [2021-06-05 05:12:30,305 INFO L226 Difference]: Without dead ends: 2840 [2021-06-05 05:12:30,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 619.4ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:12:30,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-06-05 05:12:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2526. [2021-06-05 05:12:30,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2526 states, 2525 states have (on average 4.295049504950495) internal successors, (10845), 2525 states have internal predecessors, (10845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2526 states to 2526 states and 10845 transitions. [2021-06-05 05:12:30,340 INFO L78 Accepts]: Start accepts. Automaton has 2526 states and 10845 transitions. Word has length 29 [2021-06-05 05:12:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:30,340 INFO L482 AbstractCegarLoop]: Abstraction has 2526 states and 10845 transitions. [2021-06-05 05:12:30,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2526 states and 10845 transitions. [2021-06-05 05:12:30,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:30,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:30,343 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] [2021-06-05 05:12:30,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:30,544 INFO L430 AbstractCegarLoop]: === Iteration 73 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:30,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:30,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1804686422, now seen corresponding path program 3 times [2021-06-05 05:12:30,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:30,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180665369] [2021-06-05 05:12:30,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:30,712 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 05:12:30,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:30,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180665369] [2021-06-05 05:12:30,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180665369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:30,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380735129] [2021-06-05 05:12:30,713 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 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 05:12:30,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:12:30,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:30,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:30,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:30,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:30,841 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 13 treesize of output 17 [2021-06-05 05:12:30,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:30,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:30,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:30,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 05:12:30,982 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 05:12:30,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380735129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:30,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:30,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:12:30,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130857315] [2021-06-05 05:12:30,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:12:30,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:30,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:12:30,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:30,983 INFO L87 Difference]: Start difference. First operand 2526 states and 10845 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:31,771 INFO L93 Difference]: Finished difference Result 3102 states and 12904 transitions. [2021-06-05 05:12:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:12:31,772 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:31,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:31,778 INFO L225 Difference]: With dead ends: 3102 [2021-06-05 05:12:31,778 INFO L226 Difference]: Without dead ends: 3064 [2021-06-05 05:12:31,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 695.6ms TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:12:31,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-06-05 05:12:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 2589. [2021-06-05 05:12:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2589 states, 2588 states have (on average 4.299459041731066) internal successors, (11127), 2588 states have internal predecessors, (11127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 11127 transitions. [2021-06-05 05:12:31,819 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 11127 transitions. Word has length 29 [2021-06-05 05:12:31,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:31,819 INFO L482 AbstractCegarLoop]: Abstraction has 2589 states and 11127 transitions. [2021-06-05 05:12:31,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 11127 transitions. [2021-06-05 05:12:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:31,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:31,823 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] [2021-06-05 05:12:32,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 05:12:32,025 INFO L430 AbstractCegarLoop]: === Iteration 74 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:32,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:32,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1433461416, now seen corresponding path program 4 times [2021-06-05 05:12:32,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:32,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814101825] [2021-06-05 05:12:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:32,178 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 05:12:32,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:32,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814101825] [2021-06-05 05:12:32,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814101825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:32,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739791003] [2021-06-05 05:12:32,179 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 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 05:12:32,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:32,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:32,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:32,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:32,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:32,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:32,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:32,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:32,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 05:12:32,330 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 05:12:32,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739791003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:32,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:32,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 05:12:32,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244386862] [2021-06-05 05:12:32,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:12:32,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:32,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:12:32,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:12:32,331 INFO L87 Difference]: Start difference. First operand 2589 states and 11127 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 05:12:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:32,632 INFO L93 Difference]: Finished difference Result 3136 states and 13219 transitions. [2021-06-05 05:12:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:32,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 29 [2021-06-05 05:12:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:32,639 INFO L225 Difference]: With dead ends: 3136 [2021-06-05 05:12:32,639 INFO L226 Difference]: Without dead ends: 3121 [2021-06-05 05:12:32,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:32,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-06-05 05:12:32,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2605. [2021-06-05 05:12:32,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2604 states have (on average 4.29147465437788) internal successors, (11175), 2604 states have internal predecessors, (11175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 11175 transitions. [2021-06-05 05:12:32,677 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 11175 transitions. Word has length 29 [2021-06-05 05:12:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:32,677 INFO L482 AbstractCegarLoop]: Abstraction has 2605 states and 11175 transitions. [2021-06-05 05:12:32,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 05:12:32,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 11175 transitions. [2021-06-05 05:12:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:32,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:32,681 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] [2021-06-05 05:12:32,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:32,885 INFO L430 AbstractCegarLoop]: === Iteration 75 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:32,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:32,885 INFO L82 PathProgramCache]: Analyzing trace with hash -234932026, now seen corresponding path program 5 times [2021-06-05 05:12:32,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:32,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387268163] [2021-06-05 05:12:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:33,048 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 05:12:33,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:33,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387268163] [2021-06-05 05:12:33,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387268163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:33,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086805574] [2021-06-05 05:12:33,049 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 05:12:33,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:33,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:33,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:33,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:33,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:33,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:33,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:33,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:33,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 05:12:33,221 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 05:12:33,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086805574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:33,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:33,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 05:12:33,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145584417] [2021-06-05 05:12:33,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:12:33,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:33,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:12:33,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:12:33,222 INFO L87 Difference]: Start difference. First operand 2605 states and 11175 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 05:12:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:33,592 INFO L93 Difference]: Finished difference Result 3149 states and 13269 transitions. [2021-06-05 05:12:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:33,594 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 29 [2021-06-05 05:12:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:33,601 INFO L225 Difference]: With dead ends: 3149 [2021-06-05 05:12:33,602 INFO L226 Difference]: Without dead ends: 3123 [2021-06-05 05:12:33,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:33,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-06-05 05:12:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 2510. [2021-06-05 05:12:33,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2510 states, 2509 states have (on average 4.302909525707453) internal successors, (10796), 2509 states have internal predecessors, (10796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:33,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 10796 transitions. [2021-06-05 05:12:33,670 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 10796 transitions. Word has length 29 [2021-06-05 05:12:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:33,670 INFO L482 AbstractCegarLoop]: Abstraction has 2510 states and 10796 transitions. [2021-06-05 05:12:33,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 05:12:33,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 10796 transitions. [2021-06-05 05:12:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:33,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:33,674 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] [2021-06-05 05:12:33,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:33,886 INFO L430 AbstractCegarLoop]: === Iteration 76 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:33,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:33,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1913873990, now seen corresponding path program 2 times [2021-06-05 05:12:33,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:33,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46932607] [2021-06-05 05:12:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:33,999 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 05:12:33,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:34,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46932607] [2021-06-05 05:12:34,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46932607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:34,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646706707] [2021-06-05 05:12:34,000 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 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 05:12:34,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:34,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:34,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:34,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:34,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:34,152 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 13 treesize of output 17 [2021-06-05 05:12:34,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:34,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:34,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:34,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 05:12:34,256 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 05:12:34,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646706707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:34,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:34,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:12:34,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118709400] [2021-06-05 05:12:34,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:12:34,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:34,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:12:34,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:34,257 INFO L87 Difference]: Start difference. First operand 2510 states and 10796 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:34,920 INFO L93 Difference]: Finished difference Result 3041 states and 12779 transitions. [2021-06-05 05:12:34,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:12:34,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:34,927 INFO L225 Difference]: With dead ends: 3041 [2021-06-05 05:12:34,927 INFO L226 Difference]: Without dead ends: 3022 [2021-06-05 05:12:34,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:12:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-06-05 05:12:34,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2540. [2021-06-05 05:12:34,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 4.301693580149665) internal successors, (10922), 2539 states have internal predecessors, (10922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:34,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 10922 transitions. [2021-06-05 05:12:34,964 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 10922 transitions. Word has length 29 [2021-06-05 05:12:34,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:34,965 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 10922 transitions. [2021-06-05 05:12:34,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:34,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 10922 transitions. [2021-06-05 05:12:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:34,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:34,968 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] [2021-06-05 05:12:35,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:35,169 INFO L430 AbstractCegarLoop]: === Iteration 77 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash -364239170, now seen corresponding path program 3 times [2021-06-05 05:12:35,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:35,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693996911] [2021-06-05 05:12:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:35,269 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 05:12:35,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:35,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693996911] [2021-06-05 05:12:35,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693996911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:35,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310341915] [2021-06-05 05:12:35,269 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 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 05:12:35,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:12:35,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:35,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:35,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:35,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:35,399 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 13 treesize of output 17 [2021-06-05 05:12:35,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:35,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:35,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:35,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 05:12:35,499 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 05:12:35,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310341915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:35,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:35,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:12:35,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042562074] [2021-06-05 05:12:35,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:12:35,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:35,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:12:35,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:35,501 INFO L87 Difference]: Start difference. First operand 2540 states and 10922 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:36,156 INFO L93 Difference]: Finished difference Result 3595 states and 14868 transitions. [2021-06-05 05:12:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:12:36,156 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:36,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:36,164 INFO L225 Difference]: With dead ends: 3595 [2021-06-05 05:12:36,164 INFO L226 Difference]: Without dead ends: 3557 [2021-06-05 05:12:36,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:12:36,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-06-05 05:12:36,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2640. [2021-06-05 05:12:36,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 4.297082228116711) internal successors, (11340), 2639 states have internal predecessors, (11340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:36,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 11340 transitions. [2021-06-05 05:12:36,206 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 11340 transitions. Word has length 29 [2021-06-05 05:12:36,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:36,206 INFO L482 AbstractCegarLoop]: Abstraction has 2640 states and 11340 transitions. [2021-06-05 05:12:36,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:36,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 11340 transitions. [2021-06-05 05:12:36,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:36,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:36,210 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] [2021-06-05 05:12:36,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 05:12:36,410 INFO L430 AbstractCegarLoop]: === Iteration 78 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:36,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:36,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1058115656, now seen corresponding path program 4 times [2021-06-05 05:12:36,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:36,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273438180] [2021-06-05 05:12:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:36,517 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 05:12:36,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:36,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273438180] [2021-06-05 05:12:36,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273438180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:36,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924889471] [2021-06-05 05:12:36,517 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 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 05:12:36,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:36,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:36,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:36,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:36,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:36,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:36,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:36,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:36,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 05:12:36,672 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 05:12:36,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924889471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:36,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:36,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 05:12:36,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17035929] [2021-06-05 05:12:36,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:36,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:36,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:36,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:36,673 INFO L87 Difference]: Start difference. First operand 2640 states and 11340 transitions. Second operand has 12 states, 12 states have (on average 3.25) 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 05:12:36,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:36,942 INFO L93 Difference]: Finished difference Result 3227 states and 13608 transitions. [2021-06-05 05:12:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:12:36,942 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) 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 29 [2021-06-05 05:12:36,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:36,949 INFO L225 Difference]: With dead ends: 3227 [2021-06-05 05:12:36,949 INFO L226 Difference]: Without dead ends: 3196 [2021-06-05 05:12:36,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:36,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2021-06-05 05:12:36,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2492. [2021-06-05 05:12:36,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 2491 states have (on average 4.308711360899237) internal successors, (10733), 2491 states have internal predecessors, (10733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 10733 transitions. [2021-06-05 05:12:36,988 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 10733 transitions. Word has length 29 [2021-06-05 05:12:36,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:36,988 INFO L482 AbstractCegarLoop]: Abstraction has 2492 states and 10733 transitions. [2021-06-05 05:12:36,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) 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 05:12:36,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 10733 transitions. [2021-06-05 05:12:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:36,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:36,993 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] [2021-06-05 05:12:37,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:37,197 INFO L430 AbstractCegarLoop]: === Iteration 79 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:37,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:37,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1004214994, now seen corresponding path program 6 times [2021-06-05 05:12:37,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:37,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202707211] [2021-06-05 05:12:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:37,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:37,337 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 05:12:37,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:37,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202707211] [2021-06-05 05:12:37,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202707211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:37,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373932414] [2021-06-05 05:12:37,337 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 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 05:12:37,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:12:37,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:37,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:12:37,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:37,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:37,419 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 05:12:37,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:37,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:37,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:37,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 05:12:37,538 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 05:12:37,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373932414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:37,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:37,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 05:12:37,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336792160] [2021-06-05 05:12:37,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:12:37,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:37,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:12:37,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:37,539 INFO L87 Difference]: Start difference. First operand 2492 states and 10733 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:38,357 INFO L93 Difference]: Finished difference Result 3190 states and 13408 transitions. [2021-06-05 05:12:38,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:12:38,357 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:38,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:38,364 INFO L225 Difference]: With dead ends: 3190 [2021-06-05 05:12:38,364 INFO L226 Difference]: Without dead ends: 3171 [2021-06-05 05:12:38,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 718.6ms TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:12:38,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2021-06-05 05:12:38,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 2585. [2021-06-05 05:12:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 4.312693498452012) internal successors, (11144), 2584 states have internal predecessors, (11144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 11144 transitions. [2021-06-05 05:12:38,399 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 11144 transitions. Word has length 29 [2021-06-05 05:12:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:38,399 INFO L482 AbstractCegarLoop]: Abstraction has 2585 states and 11144 transitions. [2021-06-05 05:12:38,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 11144 transitions. [2021-06-05 05:12:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:38,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:38,403 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] [2021-06-05 05:12:38,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:38,603 INFO L430 AbstractCegarLoop]: === Iteration 80 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:38,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:38,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1987479696, now seen corresponding path program 7 times [2021-06-05 05:12:38,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:38,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281760428] [2021-06-05 05:12:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:38,729 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 05:12:38,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:38,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281760428] [2021-06-05 05:12:38,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281760428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:38,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325485218] [2021-06-05 05:12:38,729 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 05:12:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:38,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:38,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:38,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:38,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 05:12:38,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:38,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:38,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:38,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 05:12:38,897 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 05:12:38,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325485218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:38,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:38,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 05:12:38,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99846496] [2021-06-05 05:12:38,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:12:38,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:38,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:12:38,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:12:38,898 INFO L87 Difference]: Start difference. First operand 2585 states and 11144 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 05:12:39,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:39,096 INFO L93 Difference]: Finished difference Result 3052 states and 12852 transitions. [2021-06-05 05:12:39,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:39,096 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 29 [2021-06-05 05:12:39,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:39,102 INFO L225 Difference]: With dead ends: 3052 [2021-06-05 05:12:39,102 INFO L226 Difference]: Without dead ends: 3037 [2021-06-05 05:12:39,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:39,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-06-05 05:12:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2604. [2021-06-05 05:12:39,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2603 states have (on average 4.303111794083749) internal successors, (11201), 2603 states have internal predecessors, (11201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 11201 transitions. [2021-06-05 05:12:39,166 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 11201 transitions. Word has length 29 [2021-06-05 05:12:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:39,166 INFO L482 AbstractCegarLoop]: Abstraction has 2604 states and 11201 transitions. [2021-06-05 05:12:39,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 05:12:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 11201 transitions. [2021-06-05 05:12:39,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:39,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:39,170 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] [2021-06-05 05:12:39,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 05:12:39,371 INFO L430 AbstractCegarLoop]: === Iteration 81 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:39,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:39,371 INFO L82 PathProgramCache]: Analyzing trace with hash 639094158, now seen corresponding path program 8 times [2021-06-05 05:12:39,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:39,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080139590] [2021-06-05 05:12:39,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:39,493 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 05:12:39,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:39,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080139590] [2021-06-05 05:12:39,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080139590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:39,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501101081] [2021-06-05 05:12:39,494 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 05:12:39,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:39,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:39,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:39,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:39,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:39,582 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 05:12:39,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:39,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:39,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:39,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:39,697 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 05:12:39,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501101081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:39,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:39,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 05:12:39,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937668135] [2021-06-05 05:12:39,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:12:39,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:39,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:12:39,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:39,698 INFO L87 Difference]: Start difference. First operand 2604 states and 11201 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 05:12:40,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:40,298 INFO L93 Difference]: Finished difference Result 2956 states and 12436 transitions. [2021-06-05 05:12:40,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:12:40,298 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 29 [2021-06-05 05:12:40,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:40,304 INFO L225 Difference]: With dead ends: 2956 [2021-06-05 05:12:40,304 INFO L226 Difference]: Without dead ends: 2942 [2021-06-05 05:12:40,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 538.1ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:12:40,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-06-05 05:12:40,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2597. [2021-06-05 05:12:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 4.305469953775039) internal successors, (11177), 2596 states have internal predecessors, (11177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 11177 transitions. [2021-06-05 05:12:40,341 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 11177 transitions. Word has length 29 [2021-06-05 05:12:40,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:40,341 INFO L482 AbstractCegarLoop]: Abstraction has 2597 states and 11177 transitions. [2021-06-05 05:12:40,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 05:12:40,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 11177 transitions. [2021-06-05 05:12:40,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:40,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:40,345 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] [2021-06-05 05:12:40,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:40,546 INFO L430 AbstractCegarLoop]: === Iteration 82 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:40,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2040866216, now seen corresponding path program 9 times [2021-06-05 05:12:40,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:40,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136881605] [2021-06-05 05:12:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:40,682 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 05:12:40,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:40,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136881605] [2021-06-05 05:12:40,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136881605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:40,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078588635] [2021-06-05 05:12:40,682 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 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 05:12:40,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:40,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:40,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:12:40,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:40,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:40,767 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 05:12:40,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:40,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:40,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:40,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 05:12:40,871 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 05:12:40,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078588635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:40,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:40,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 05:12:40,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979237916] [2021-06-05 05:12:40,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:12:40,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:40,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:12:40,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:40,872 INFO L87 Difference]: Start difference. First operand 2597 states and 11177 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 05:12:41,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:41,362 INFO L93 Difference]: Finished difference Result 3119 states and 13036 transitions. [2021-06-05 05:12:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:12:41,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 29 [2021-06-05 05:12:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:41,368 INFO L225 Difference]: With dead ends: 3119 [2021-06-05 05:12:41,368 INFO L226 Difference]: Without dead ends: 3096 [2021-06-05 05:12:41,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 477.6ms TimeCoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:12:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-06-05 05:12:41,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2534. [2021-06-05 05:12:41,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 4.3024082116067905) internal successors, (10898), 2533 states have internal predecessors, (10898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 10898 transitions. [2021-06-05 05:12:41,404 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 10898 transitions. Word has length 29 [2021-06-05 05:12:41,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:41,405 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 10898 transitions. [2021-06-05 05:12:41,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 05:12:41,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 10898 transitions. [2021-06-05 05:12:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:41,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:41,408 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] [2021-06-05 05:12:41,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:41,609 INFO L430 AbstractCegarLoop]: === Iteration 83 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:41,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:41,609 INFO L82 PathProgramCache]: Analyzing trace with hash 548011288, now seen corresponding path program 10 times [2021-06-05 05:12:41,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:41,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608095953] [2021-06-05 05:12:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:41,745 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 05:12:41,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:41,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608095953] [2021-06-05 05:12:41,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608095953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:41,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946681141] [2021-06-05 05:12:41,745 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 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 05:12:41,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:41,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:41,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:41,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:41,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:41,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:41,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:41,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:41,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 05:12:41,931 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 05:12:41,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946681141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:41,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:41,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 05:12:41,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414038674] [2021-06-05 05:12:41,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:12:41,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:41,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:12:41,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:41,932 INFO L87 Difference]: Start difference. First operand 2534 states and 10898 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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 05:12:42,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:42,156 INFO L93 Difference]: Finished difference Result 2643 states and 11266 transitions. [2021-06-05 05:12:42,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:42,156 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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 29 [2021-06-05 05:12:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:42,162 INFO L225 Difference]: With dead ends: 2643 [2021-06-05 05:12:42,162 INFO L226 Difference]: Without dead ends: 2628 [2021-06-05 05:12:42,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:42,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-06-05 05:12:42,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2534. [2021-06-05 05:12:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 4.3024082116067905) internal successors, (10898), 2533 states have internal predecessors, (10898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 10898 transitions. [2021-06-05 05:12:42,197 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 10898 transitions. Word has length 29 [2021-06-05 05:12:42,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:42,197 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 10898 transitions. [2021-06-05 05:12:42,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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 05:12:42,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 10898 transitions. [2021-06-05 05:12:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:42,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:42,201 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] [2021-06-05 05:12:42,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:42,401 INFO L430 AbstractCegarLoop]: === Iteration 84 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:42,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:42,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1085301608, now seen corresponding path program 11 times [2021-06-05 05:12:42,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:42,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614622254] [2021-06-05 05:12:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:42,525 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 05:12:42,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:42,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614622254] [2021-06-05 05:12:42,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614622254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:42,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593699956] [2021-06-05 05:12:42,526 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 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 05:12:42,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:42,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:42,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:42,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:42,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:42,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:42,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:42,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 05:12:42,666 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 05:12:42,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593699956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:42,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:42,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 05:12:42,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245260737] [2021-06-05 05:12:42,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:12:42,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:42,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:12:42,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:12:42,667 INFO L87 Difference]: Start difference. First operand 2534 states and 10898 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 05:12:42,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:42,866 INFO L93 Difference]: Finished difference Result 2986 states and 12678 transitions. [2021-06-05 05:12:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:42,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 29 [2021-06-05 05:12:42,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:42,872 INFO L225 Difference]: With dead ends: 2986 [2021-06-05 05:12:42,872 INFO L226 Difference]: Without dead ends: 2972 [2021-06-05 05:12:42,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-06-05 05:12:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2522. [2021-06-05 05:12:42,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 4.308607695358985) internal successors, (10862), 2521 states have internal predecessors, (10862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 10862 transitions. [2021-06-05 05:12:42,909 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 10862 transitions. Word has length 29 [2021-06-05 05:12:42,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:42,909 INFO L482 AbstractCegarLoop]: Abstraction has 2522 states and 10862 transitions. [2021-06-05 05:12:42,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 05:12:42,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 10862 transitions. [2021-06-05 05:12:42,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:42,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:42,913 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] [2021-06-05 05:12:43,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:43,113 INFO L430 AbstractCegarLoop]: === Iteration 85 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:43,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2051190826, now seen corresponding path program 12 times [2021-06-05 05:12:43,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:43,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142907877] [2021-06-05 05:12:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:43,243 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 05:12:43,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:43,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142907877] [2021-06-05 05:12:43,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142907877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:43,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038985145] [2021-06-05 05:12:43,243 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 05:12:43,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:12:43,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:43,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:43,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:43,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:43,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:12:43,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:43,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:43,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:43,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:43,472 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 05:12:43,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038985145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:43,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:43,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:12:43,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170539201] [2021-06-05 05:12:43,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:12:43,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:43,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:12:43,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:43,473 INFO L87 Difference]: Start difference. First operand 2522 states and 10862 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:44,353 INFO L93 Difference]: Finished difference Result 3049 states and 12765 transitions. [2021-06-05 05:12:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:12:44,353 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:44,359 INFO L225 Difference]: With dead ends: 3049 [2021-06-05 05:12:44,359 INFO L226 Difference]: Without dead ends: 3030 [2021-06-05 05:12:44,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 761.6ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:12:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-06-05 05:12:44,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2612. [2021-06-05 05:12:44,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2612 states, 2611 states have (on average 4.316353887399464) internal successors, (11270), 2611 states have internal predecessors, (11270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2612 states to 2612 states and 11270 transitions. [2021-06-05 05:12:44,423 INFO L78 Accepts]: Start accepts. Automaton has 2612 states and 11270 transitions. Word has length 29 [2021-06-05 05:12:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:44,423 INFO L482 AbstractCegarLoop]: Abstraction has 2612 states and 11270 transitions. [2021-06-05 05:12:44,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:44,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2612 states and 11270 transitions. [2021-06-05 05:12:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:44,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:44,429 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] [2021-06-05 05:12:44,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:44,630 INFO L430 AbstractCegarLoop]: === Iteration 86 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:44,630 INFO L82 PathProgramCache]: Analyzing trace with hash -747918220, now seen corresponding path program 13 times [2021-06-05 05:12:44,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:44,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616225453] [2021-06-05 05:12:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:44,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:44,756 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 05:12:44,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:44,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616225453] [2021-06-05 05:12:44,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616225453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:44,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973179087] [2021-06-05 05:12:44,756 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 05:12:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:44,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:44,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:44,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:44,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:44,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:44,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:44,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 05:12:44,897 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 05:12:44,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973179087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:44,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:44,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 05:12:44,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9883352] [2021-06-05 05:12:44,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:12:44,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:44,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:12:44,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:12:44,898 INFO L87 Difference]: Start difference. First operand 2612 states and 11270 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 05:12:45,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:45,106 INFO L93 Difference]: Finished difference Result 3082 states and 13050 transitions. [2021-06-05 05:12:45,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:45,106 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 29 [2021-06-05 05:12:45,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:45,112 INFO L225 Difference]: With dead ends: 3082 [2021-06-05 05:12:45,113 INFO L226 Difference]: Without dead ends: 3067 [2021-06-05 05:12:45,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:45,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2021-06-05 05:12:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2631. [2021-06-05 05:12:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2630 states have (on average 4.30722433460076) internal successors, (11328), 2630 states have internal predecessors, (11328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:45,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 11328 transitions. [2021-06-05 05:12:45,153 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 11328 transitions. Word has length 29 [2021-06-05 05:12:45,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:45,153 INFO L482 AbstractCegarLoop]: Abstraction has 2631 states and 11328 transitions. [2021-06-05 05:12:45,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 05:12:45,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 11328 transitions. [2021-06-05 05:12:45,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:45,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:45,157 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] [2021-06-05 05:12:45,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:45,358 INFO L430 AbstractCegarLoop]: === Iteration 87 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:45,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:45,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1878655634, now seen corresponding path program 14 times [2021-06-05 05:12:45,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:45,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563980355] [2021-06-05 05:12:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:45,490 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 05:12:45,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:45,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563980355] [2021-06-05 05:12:45,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563980355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:45,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9022234] [2021-06-05 05:12:45,491 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 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 05:12:45,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:45,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:45,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:45,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:45,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:45,581 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 05:12:45,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:45,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:45,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:45,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:45,695 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 05:12:45,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9022234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:45,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:45,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 05:12:45,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163449987] [2021-06-05 05:12:45,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:12:45,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:45,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:12:45,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:45,696 INFO L87 Difference]: Start difference. First operand 2631 states and 11328 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 05:12:46,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:46,393 INFO L93 Difference]: Finished difference Result 3044 states and 12758 transitions. [2021-06-05 05:12:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:12:46,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 29 [2021-06-05 05:12:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:46,400 INFO L225 Difference]: With dead ends: 3044 [2021-06-05 05:12:46,400 INFO L226 Difference]: Without dead ends: 3030 [2021-06-05 05:12:46,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 629.6ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:12:46,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-06-05 05:12:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2624. [2021-06-05 05:12:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 4.309569195577583) internal successors, (11304), 2623 states have internal predecessors, (11304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 11304 transitions. [2021-06-05 05:12:46,437 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 11304 transitions. Word has length 29 [2021-06-05 05:12:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:46,437 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 11304 transitions. [2021-06-05 05:12:46,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 05:12:46,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 11304 transitions. [2021-06-05 05:12:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:46,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:46,441 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] [2021-06-05 05:12:46,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 05:12:46,641 INFO L430 AbstractCegarLoop]: === Iteration 88 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:46,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:46,642 INFO L82 PathProgramCache]: Analyzing trace with hash -801304740, now seen corresponding path program 15 times [2021-06-05 05:12:46,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:46,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761886275] [2021-06-05 05:12:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:46,792 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 05:12:46,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:46,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761886275] [2021-06-05 05:12:46,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761886275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:46,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776409559] [2021-06-05 05:12:46,792 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 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 05:12:46,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:12:46,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:46,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:46,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:46,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:46,906 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 05:12:46,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:46,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:46,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:46,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:47,050 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 05:12:47,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776409559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:47,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:47,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 05:12:47,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251755616] [2021-06-05 05:12:47,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:12:47,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:47,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:12:47,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:47,052 INFO L87 Difference]: Start difference. First operand 2624 states and 11304 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 05:12:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:47,690 INFO L93 Difference]: Finished difference Result 3012 states and 12687 transitions. [2021-06-05 05:12:47,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:12:47,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 29 [2021-06-05 05:12:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:47,696 INFO L225 Difference]: With dead ends: 3012 [2021-06-05 05:12:47,696 INFO L226 Difference]: Without dead ends: 2989 [2021-06-05 05:12:47,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 600.2ms TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:12:47,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2021-06-05 05:12:47,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2552. [2021-06-05 05:12:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 4.31125049000392) internal successors, (10998), 2551 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 10998 transitions. [2021-06-05 05:12:47,730 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 10998 transitions. Word has length 29 [2021-06-05 05:12:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:47,730 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 10998 transitions. [2021-06-05 05:12:47,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 05:12:47,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 10998 transitions. [2021-06-05 05:12:47,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:47,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:47,734 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] [2021-06-05 05:12:47,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:47,934 INFO L430 AbstractCegarLoop]: === Iteration 89 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:47,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1337845358, now seen corresponding path program 16 times [2021-06-05 05:12:47,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:47,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839324005] [2021-06-05 05:12:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:48,062 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 05:12:48,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:48,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839324005] [2021-06-05 05:12:48,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839324005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:48,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309325388] [2021-06-05 05:12:48,062 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 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 05:12:48,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:48,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:48,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:48,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:48,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:48,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:48,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:48,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:48,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 05:12:48,220 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 05:12:48,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309325388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:48,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:48,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 05:12:48,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822313226] [2021-06-05 05:12:48,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:12:48,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:48,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:12:48,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:48,221 INFO L87 Difference]: Start difference. First operand 2552 states and 10998 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:48,469 INFO L93 Difference]: Finished difference Result 2687 states and 11479 transitions. [2021-06-05 05:12:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:48,469 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:48,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:48,475 INFO L225 Difference]: With dead ends: 2687 [2021-06-05 05:12:48,475 INFO L226 Difference]: Without dead ends: 2668 [2021-06-05 05:12:48,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:48,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2021-06-05 05:12:48,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2552. [2021-06-05 05:12:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 4.31125049000392) internal successors, (10998), 2551 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 10998 transitions. [2021-06-05 05:12:48,511 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 10998 transitions. Word has length 29 [2021-06-05 05:12:48,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:48,511 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 10998 transitions. [2021-06-05 05:12:48,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:48,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 10998 transitions. [2021-06-05 05:12:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:48,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:48,514 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] [2021-06-05 05:12:48,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 05:12:48,715 INFO L430 AbstractCegarLoop]: === Iteration 90 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:48,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:48,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1901442782, now seen corresponding path program 17 times [2021-06-05 05:12:48,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:48,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334742374] [2021-06-05 05:12:48,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:48,844 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 05:12:48,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:48,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334742374] [2021-06-05 05:12:48,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334742374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:48,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127287212] [2021-06-05 05:12:48,845 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 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 05:12:48,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:48,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:48,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:48,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:48,931 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 05:12:48,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:48,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:48,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:48,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:19 [2021-06-05 05:12:49,033 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 05:12:49,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127287212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:49,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:49,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 05:12:49,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826478038] [2021-06-05 05:12:49,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:12:49,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:49,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:12:49,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:49,033 INFO L87 Difference]: Start difference. First operand 2552 states and 10998 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:49,238 INFO L93 Difference]: Finished difference Result 3039 states and 12853 transitions. [2021-06-05 05:12:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:12:49,239 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:49,245 INFO L225 Difference]: With dead ends: 3039 [2021-06-05 05:12:49,245 INFO L226 Difference]: Without dead ends: 3016 [2021-06-05 05:12:49,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2021-06-05 05:12:49,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 2522. [2021-06-05 05:12:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 4.308607695358985) internal successors, (10862), 2521 states have internal predecessors, (10862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 10862 transitions. [2021-06-05 05:12:49,282 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 10862 transitions. Word has length 29 [2021-06-05 05:12:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:49,282 INFO L482 AbstractCegarLoop]: Abstraction has 2522 states and 10862 transitions. [2021-06-05 05:12:49,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 10862 transitions. [2021-06-05 05:12:49,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:49,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:49,285 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] [2021-06-05 05:12:49,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 05:12:49,486 INFO L430 AbstractCegarLoop]: === Iteration 91 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:49,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:49,487 INFO L82 PathProgramCache]: Analyzing trace with hash -865854478, now seen corresponding path program 5 times [2021-06-05 05:12:49,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:49,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429473684] [2021-06-05 05:12:49,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:49,650 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 05:12:49,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:49,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429473684] [2021-06-05 05:12:49,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429473684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:49,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486317934] [2021-06-05 05:12:49,651 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 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 05:12:49,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:49,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:49,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:49,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:49,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:49,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:49,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:49,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:49,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 05:12:49,801 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 05:12:49,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486317934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:49,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:49,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 05:12:49,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363472182] [2021-06-05 05:12:49,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:49,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:49,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:49,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:49,802 INFO L87 Difference]: Start difference. First operand 2522 states and 10862 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) 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 05:12:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:50,093 INFO L93 Difference]: Finished difference Result 3129 states and 13232 transitions. [2021-06-05 05:12:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:12:50,093 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) 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 29 [2021-06-05 05:12:50,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:50,100 INFO L225 Difference]: With dead ends: 3129 [2021-06-05 05:12:50,100 INFO L226 Difference]: Without dead ends: 3110 [2021-06-05 05:12:50,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:50,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2021-06-05 05:12:50,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2661. [2021-06-05 05:12:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 4.300375939849624) internal successors, (11439), 2660 states have internal predecessors, (11439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:50,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 11439 transitions. [2021-06-05 05:12:50,137 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 11439 transitions. Word has length 29 [2021-06-05 05:12:50,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:50,137 INFO L482 AbstractCegarLoop]: Abstraction has 2661 states and 11439 transitions. [2021-06-05 05:12:50,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) 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 05:12:50,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 11439 transitions. [2021-06-05 05:12:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:50,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:50,141 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] [2021-06-05 05:12:50,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:50,342 INFO L430 AbstractCegarLoop]: === Iteration 92 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:50,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:50,342 INFO L82 PathProgramCache]: Analyzing trace with hash 556500348, now seen corresponding path program 6 times [2021-06-05 05:12:50,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:50,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091584698] [2021-06-05 05:12:50,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:50,470 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 05:12:50,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:50,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091584698] [2021-06-05 05:12:50,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091584698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:50,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124004638] [2021-06-05 05:12:50,470 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 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 05:12:50,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:12:50,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:50,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:12:50,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:50,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:50,552 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 05:12:50,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:50,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:50,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:50,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 05:12:50,664 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 05:12:50,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124004638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:50,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:50,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 05:12:50,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813345983] [2021-06-05 05:12:50,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:12:50,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:12:50,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:50,665 INFO L87 Difference]: Start difference. First operand 2661 states and 11439 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 05:12:51,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:51,148 INFO L93 Difference]: Finished difference Result 3480 states and 14546 transitions. [2021-06-05 05:12:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:12:51,148 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 29 [2021-06-05 05:12:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:51,155 INFO L225 Difference]: With dead ends: 3480 [2021-06-05 05:12:51,155 INFO L226 Difference]: Without dead ends: 3449 [2021-06-05 05:12:51,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 468.7ms TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:12:51,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states. [2021-06-05 05:12:51,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 2561. [2021-06-05 05:12:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 4.305078125) internal successors, (11021), 2560 states have internal predecessors, (11021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 11021 transitions. [2021-06-05 05:12:51,193 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 11021 transitions. Word has length 29 [2021-06-05 05:12:51,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:51,193 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 11021 transitions. [2021-06-05 05:12:51,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 05:12:51,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 11021 transitions. [2021-06-05 05:12:51,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:51,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:51,196 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] [2021-06-05 05:12:51,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:51,397 INFO L430 AbstractCegarLoop]: === Iteration 93 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:51,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:51,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2106272904, now seen corresponding path program 7 times [2021-06-05 05:12:51,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:51,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751113791] [2021-06-05 05:12:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:51,519 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 05:12:51,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:51,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751113791] [2021-06-05 05:12:51,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751113791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:51,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374099524] [2021-06-05 05:12:51,519 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 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 05:12:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:51,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:51,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:51,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:51,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:51,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:51,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:51,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 05:12:51,677 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 05:12:51,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374099524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:51,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:51,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:12:51,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980775622] [2021-06-05 05:12:51,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:12:51,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:51,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:12:51,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:12:51,678 INFO L87 Difference]: Start difference. First operand 2561 states and 11021 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 05:12:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:51,986 INFO L93 Difference]: Finished difference Result 2679 states and 11423 transitions. [2021-06-05 05:12:51,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:12:51,987 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 29 [2021-06-05 05:12:51,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:51,992 INFO L225 Difference]: With dead ends: 2679 [2021-06-05 05:12:51,992 INFO L226 Difference]: Without dead ends: 2664 [2021-06-05 05:12:51,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 282.8ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-06-05 05:12:52,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2537. [2021-06-05 05:12:52,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2536 states have (on average 4.306782334384858) internal successors, (10922), 2536 states have internal predecessors, (10922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 10922 transitions. [2021-06-05 05:12:52,029 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 10922 transitions. Word has length 29 [2021-06-05 05:12:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:52,029 INFO L482 AbstractCegarLoop]: Abstraction has 2537 states and 10922 transitions. [2021-06-05 05:12:52,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 05:12:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 10922 transitions. [2021-06-05 05:12:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:52,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:52,033 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] [2021-06-05 05:12:52,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:52,233 INFO L430 AbstractCegarLoop]: === Iteration 94 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:52,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:52,233 INFO L82 PathProgramCache]: Analyzing trace with hash 382055414, now seen corresponding path program 8 times [2021-06-05 05:12:52,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:52,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543210517] [2021-06-05 05:12:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:52,381 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 05:12:52,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:52,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543210517] [2021-06-05 05:12:52,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543210517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:52,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609230637] [2021-06-05 05:12:52,381 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 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 05:12:52,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:52,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:52,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:52,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:52,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:52,466 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 05:12:52,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:52,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:52,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:52,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:52,603 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 05:12:52,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609230637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:52,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:52,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:12:52,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438046610] [2021-06-05 05:12:52,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:12:52,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:52,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:12:52,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:52,604 INFO L87 Difference]: Start difference. First operand 2537 states and 10922 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:53,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:53,657 INFO L93 Difference]: Finished difference Result 3319 states and 13757 transitions. [2021-06-05 05:12:53,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:12:53,657 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:53,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:53,664 INFO L225 Difference]: With dead ends: 3319 [2021-06-05 05:12:53,664 INFO L226 Difference]: Without dead ends: 3273 [2021-06-05 05:12:53,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 946.8ms TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:12:53,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-06-05 05:12:53,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2685. [2021-06-05 05:12:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2684 states have (on average 4.2831594634873325) internal successors, (11496), 2684 states have internal predecessors, (11496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:53,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 11496 transitions. [2021-06-05 05:12:53,702 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 11496 transitions. Word has length 29 [2021-06-05 05:12:53,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:53,702 INFO L482 AbstractCegarLoop]: Abstraction has 2685 states and 11496 transitions. [2021-06-05 05:12:53,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:53,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 11496 transitions. [2021-06-05 05:12:53,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:53,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:53,706 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] [2021-06-05 05:12:53,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 05:12:53,906 INFO L430 AbstractCegarLoop]: === Iteration 95 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:53,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:53,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1804410240, now seen corresponding path program 9 times [2021-06-05 05:12:53,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:53,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235973806] [2021-06-05 05:12:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:54,060 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 05:12:54,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:54,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235973806] [2021-06-05 05:12:54,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235973806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:54,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800100405] [2021-06-05 05:12:54,060 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 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 05:12:54,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:54,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:54,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:12:54,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:54,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:54,148 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 05:12:54,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:54,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:54,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:54,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 05:12:54,259 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 05:12:54,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800100405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:54,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:54,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 05:12:54,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465846498] [2021-06-05 05:12:54,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:12:54,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:54,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:12:54,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:54,260 INFO L87 Difference]: Start difference. First operand 2685 states and 11496 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 05:12:54,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:54,672 INFO L93 Difference]: Finished difference Result 3480 states and 14560 transitions. [2021-06-05 05:12:54,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:12:54,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 29 [2021-06-05 05:12:54,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:54,679 INFO L225 Difference]: With dead ends: 3480 [2021-06-05 05:12:54,679 INFO L226 Difference]: Without dead ends: 3407 [2021-06-05 05:12:54,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 427.5ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:12:54,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-06-05 05:12:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 2621. [2021-06-05 05:12:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2621 states, 2620 states have (on average 4.307251908396947) internal successors, (11285), 2620 states have internal predecessors, (11285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 11285 transitions. [2021-06-05 05:12:54,721 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 11285 transitions. Word has length 29 [2021-06-05 05:12:54,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:54,721 INFO L482 AbstractCegarLoop]: Abstraction has 2621 states and 11285 transitions. [2021-06-05 05:12:54,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 05:12:54,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 11285 transitions. [2021-06-05 05:12:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:54,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:54,725 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] [2021-06-05 05:12:54,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:54,925 INFO L430 AbstractCegarLoop]: === Iteration 96 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:54,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:54,926 INFO L82 PathProgramCache]: Analyzing trace with hash 220727986, now seen corresponding path program 10 times [2021-06-05 05:12:54,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:54,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045088440] [2021-06-05 05:12:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:55,060 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 05:12:55,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:55,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045088440] [2021-06-05 05:12:55,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045088440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:55,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707595947] [2021-06-05 05:12:55,060 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 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 05:12:55,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:55,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:55,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:55,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:55,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:12:55,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:55,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:55,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:55,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:12:55,215 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 05:12:55,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707595947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:55,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:55,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 05:12:55,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496220872] [2021-06-05 05:12:55,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:55,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:55,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:55,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:55,216 INFO L87 Difference]: Start difference. First operand 2621 states and 11285 transitions. Second operand has 12 states, 12 states have (on average 3.25) 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 05:12:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:55,493 INFO L93 Difference]: Finished difference Result 2765 states and 11775 transitions. [2021-06-05 05:12:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:12:55,494 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) 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 29 [2021-06-05 05:12:55,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:55,499 INFO L225 Difference]: With dead ends: 2765 [2021-06-05 05:12:55,499 INFO L226 Difference]: Without dead ends: 2746 [2021-06-05 05:12:55,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:55,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-06-05 05:12:55,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2618. [2021-06-05 05:12:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2617 states have (on average 4.30875047764616) internal successors, (11276), 2617 states have internal predecessors, (11276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 11276 transitions. [2021-06-05 05:12:55,533 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 11276 transitions. Word has length 29 [2021-06-05 05:12:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:55,533 INFO L482 AbstractCegarLoop]: Abstraction has 2618 states and 11276 transitions. [2021-06-05 05:12:55,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) 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 05:12:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 11276 transitions. [2021-06-05 05:12:55,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:55,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:55,537 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] [2021-06-05 05:12:55,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 05:12:55,738 INFO L430 AbstractCegarLoop]: === Iteration 97 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:55,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:55,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1672937528, now seen corresponding path program 18 times [2021-06-05 05:12:55,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:55,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650074780] [2021-06-05 05:12:55,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:55,811 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 05:12:55,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:55,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650074780] [2021-06-05 05:12:55,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650074780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:55,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62673288] [2021-06-05 05:12:55,812 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 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 05:12:55,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:12:55,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:55,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:55,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:55,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:55,897 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 05:12:55,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:55,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:55,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:55,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:56,029 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 05:12:56,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62673288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:56,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:56,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:12:56,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263836341] [2021-06-05 05:12:56,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:12:56,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:56,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:12:56,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:56,031 INFO L87 Difference]: Start difference. First operand 2618 states and 11276 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:56,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:56,506 INFO L93 Difference]: Finished difference Result 3191 states and 13490 transitions. [2021-06-05 05:12:56,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:12:56,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:56,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:56,513 INFO L225 Difference]: With dead ends: 3191 [2021-06-05 05:12:56,513 INFO L226 Difference]: Without dead ends: 3172 [2021-06-05 05:12:56,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 391.9ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:12:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2021-06-05 05:12:56,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 2734. [2021-06-05 05:12:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2733 states have (on average 4.304427369191365) internal successors, (11764), 2733 states have internal predecessors, (11764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 11764 transitions. [2021-06-05 05:12:56,551 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 11764 transitions. Word has length 29 [2021-06-05 05:12:56,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:56,552 INFO L482 AbstractCegarLoop]: Abstraction has 2734 states and 11764 transitions. [2021-06-05 05:12:56,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:56,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 11764 transitions. [2021-06-05 05:12:56,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:56,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:56,556 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] [2021-06-05 05:12:56,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:56,756 INFO L430 AbstractCegarLoop]: === Iteration 98 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:56,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:56,756 INFO L82 PathProgramCache]: Analyzing trace with hash -369664922, now seen corresponding path program 19 times [2021-06-05 05:12:56,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:56,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64495561] [2021-06-05 05:12:56,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:56,840 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 05:12:56,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:56,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64495561] [2021-06-05 05:12:56,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64495561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:56,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280730244] [2021-06-05 05:12:56,841 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 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 05:12:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:56,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:56,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:56,919 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 05:12:56,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:56,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:56,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:56,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-06-05 05:12:57,039 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 05:12:57,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280730244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:57,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:57,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-06-05 05:12:57,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803185424] [2021-06-05 05:12:57,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:57,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:57,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:57,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:57,041 INFO L87 Difference]: Start difference. First operand 2734 states and 11764 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 05:12:57,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:57,285 INFO L93 Difference]: Finished difference Result 3116 states and 13133 transitions. [2021-06-05 05:12:57,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:12:57,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 29 [2021-06-05 05:12:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:57,291 INFO L225 Difference]: With dead ends: 3116 [2021-06-05 05:12:57,291 INFO L226 Difference]: Without dead ends: 3030 [2021-06-05 05:12:57,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:57,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-06-05 05:12:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2689. [2021-06-05 05:12:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2689 states, 2688 states have (on average 4.312127976190476) internal successors, (11591), 2688 states have internal predecessors, (11591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2689 states to 2689 states and 11591 transitions. [2021-06-05 05:12:57,329 INFO L78 Accepts]: Start accepts. Automaton has 2689 states and 11591 transitions. Word has length 29 [2021-06-05 05:12:57,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:57,329 INFO L482 AbstractCegarLoop]: Abstraction has 2689 states and 11591 transitions. [2021-06-05 05:12:57,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 05:12:57,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2689 states and 11591 transitions. [2021-06-05 05:12:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:57,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:57,333 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] [2021-06-05 05:12:57,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:57,534 INFO L430 AbstractCegarLoop]: === Iteration 99 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:57,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:57,534 INFO L82 PathProgramCache]: Analyzing trace with hash -2129141234, now seen corresponding path program 20 times [2021-06-05 05:12:57,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:57,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241672818] [2021-06-05 05:12:57,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:57,612 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 05:12:57,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:57,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241672818] [2021-06-05 05:12:57,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241672818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:57,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715712250] [2021-06-05 05:12:57,613 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 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 05:12:57,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:57,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:57,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:57,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:57,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:57,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:12:57,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:57,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:57,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:57,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:57,837 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 05:12:57,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715712250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:57,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:57,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:12:57,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398957084] [2021-06-05 05:12:57,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:12:57,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:57,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:12:57,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:57,838 INFO L87 Difference]: Start difference. First operand 2689 states and 11591 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:58,420 INFO L93 Difference]: Finished difference Result 2856 states and 12151 transitions. [2021-06-05 05:12:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:12:58,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:58,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:58,427 INFO L225 Difference]: With dead ends: 2856 [2021-06-05 05:12:58,427 INFO L226 Difference]: Without dead ends: 2841 [2021-06-05 05:12:58,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 455.3ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:12:58,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-06-05 05:12:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2686. [2021-06-05 05:12:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 2685 states have (on average 4.313594040968343) internal successors, (11582), 2685 states have internal predecessors, (11582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 11582 transitions. [2021-06-05 05:12:58,465 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 11582 transitions. Word has length 29 [2021-06-05 05:12:58,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:58,465 INFO L482 AbstractCegarLoop]: Abstraction has 2686 states and 11582 transitions. [2021-06-05 05:12:58,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:58,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 11582 transitions. [2021-06-05 05:12:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:58,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:58,468 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] [2021-06-05 05:12:58,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 05:12:58,689 INFO L430 AbstractCegarLoop]: === Iteration 100 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:58,689 INFO L82 PathProgramCache]: Analyzing trace with hash -433376052, now seen corresponding path program 21 times [2021-06-05 05:12:58,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:58,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383619499] [2021-06-05 05:12:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:58,773 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 05:12:58,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:58,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383619499] [2021-06-05 05:12:58,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383619499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:58,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387625202] [2021-06-05 05:12:58,773 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 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 05:12:58,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:58,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:58,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:12:58,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:58,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:58,869 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 05:12:58,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:58,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:58,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:58,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 05:12:58,980 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 05:12:58,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387625202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:58,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:58,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 05:12:58,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246914980] [2021-06-05 05:12:58,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:12:58,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:58,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:12:58,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:58,981 INFO L87 Difference]: Start difference. First operand 2686 states and 11582 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:59,460 INFO L93 Difference]: Finished difference Result 3614 states and 15141 transitions. [2021-06-05 05:12:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:12:59,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:12:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:59,468 INFO L225 Difference]: With dead ends: 3614 [2021-06-05 05:12:59,468 INFO L226 Difference]: Without dead ends: 3595 [2021-06-05 05:12:59,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 440.9ms TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:12:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3595 states. [2021-06-05 05:12:59,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3595 to 2796. [2021-06-05 05:12:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 4.311985688729875) internal successors, (12052), 2795 states have internal predecessors, (12052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 12052 transitions. [2021-06-05 05:12:59,508 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 12052 transitions. Word has length 29 [2021-06-05 05:12:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:59,509 INFO L482 AbstractCegarLoop]: Abstraction has 2796 states and 12052 transitions. [2021-06-05 05:12:59,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 12052 transitions. [2021-06-05 05:12:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:12:59,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:59,513 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, 1, 1, 1] [2021-06-05 05:12:59,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 05:12:59,713 INFO L430 AbstractCegarLoop]: === Iteration 101 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:59,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:59,714 INFO L82 PathProgramCache]: Analyzing trace with hash 869896554, now seen corresponding path program 22 times [2021-06-05 05:12:59,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:59,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637729770] [2021-06-05 05:12:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:59,785 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 05:12:59,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:59,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637729770] [2021-06-05 05:12:59,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637729770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:59,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368188831] [2021-06-05 05:12:59,786 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 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 05:12:59,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:59,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:59,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:59,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:59,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:59,845 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 05:12:59,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:59,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:59,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:59,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:24 [2021-06-05 05:12:59,946 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 05:12:59,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368188831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:59,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:59,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-06-05 05:12:59,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096344446] [2021-06-05 05:12:59,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:59,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:59,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:59,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:59,947 INFO L87 Difference]: Start difference. First operand 2796 states and 12052 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 05:13:00,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:00,164 INFO L93 Difference]: Finished difference Result 3190 states and 13473 transitions. [2021-06-05 05:13:00,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:13:00,164 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 29 [2021-06-05 05:13:00,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:00,170 INFO L225 Difference]: With dead ends: 3190 [2021-06-05 05:13:00,170 INFO L226 Difference]: Without dead ends: 3110 [2021-06-05 05:13:00,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:13:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2021-06-05 05:13:00,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2716. [2021-06-05 05:13:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 4.311602209944751) internal successors, (11706), 2715 states have internal predecessors, (11706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 11706 transitions. [2021-06-05 05:13:00,208 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 11706 transitions. Word has length 29 [2021-06-05 05:13:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:00,208 INFO L482 AbstractCegarLoop]: Abstraction has 2716 states and 11706 transitions. [2021-06-05 05:13:00,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 05:13:00,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 11706 transitions. [2021-06-05 05:13:00,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:13:00,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:00,212 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] [2021-06-05 05:13:00,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:00,413 INFO L430 AbstractCegarLoop]: === Iteration 102 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:00,413 INFO L82 PathProgramCache]: Analyzing trace with hash 279969416, now seen corresponding path program 23 times [2021-06-05 05:13:00,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:00,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542960520] [2021-06-05 05:13:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:00,497 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 05:13:00,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:00,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542960520] [2021-06-05 05:13:00,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542960520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:00,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9574326] [2021-06-05 05:13:00,498 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 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 05:13:00,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:00,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:00,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:00,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:00,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:00,577 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 13 treesize of output 7 [2021-06-05 05:13:00,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:00,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:00,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:00,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 05:13:00,642 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 05:13:00,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9574326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:00,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:00,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 05:13:00,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399620030] [2021-06-05 05:13:00,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:13:00,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:00,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:13:00,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:13:00,643 INFO L87 Difference]: Start difference. First operand 2716 states and 11706 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 05:13:00,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:00,810 INFO L93 Difference]: Finished difference Result 2845 states and 12158 transitions. [2021-06-05 05:13:00,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:13:00,810 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 29 [2021-06-05 05:13:00,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:00,816 INFO L225 Difference]: With dead ends: 2845 [2021-06-05 05:13:00,816 INFO L226 Difference]: Without dead ends: 2826 [2021-06-05 05:13:00,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:13:00,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-06-05 05:13:00,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2713. [2021-06-05 05:13:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 4.312684365781711) internal successors, (11696), 2712 states have internal predecessors, (11696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 11696 transitions. [2021-06-05 05:13:00,872 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 11696 transitions. Word has length 29 [2021-06-05 05:13:00,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:00,872 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 11696 transitions. [2021-06-05 05:13:00,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 05:13:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 11696 transitions. [2021-06-05 05:13:00,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:13:00,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:00,876 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] [2021-06-05 05:13:01,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 05:13:01,077 INFO L430 AbstractCegarLoop]: === Iteration 103 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:01,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:01,077 INFO L82 PathProgramCache]: Analyzing trace with hash 25278284, now seen corresponding path program 24 times [2021-06-05 05:13:01,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:01,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127049212] [2021-06-05 05:13:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:01,153 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 05:13:01,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:01,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127049212] [2021-06-05 05:13:01,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127049212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:01,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806379368] [2021-06-05 05:13:01,153 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 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 05:13:01,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:13:01,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:01,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:01,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:01,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:01,286 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 13 treesize of output 17 [2021-06-05 05:13:01,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:13:01,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:01,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:01,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 05:13:01,404 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 05:13:01,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806379368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:01,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:01,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:13:01,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208459229] [2021-06-05 05:13:01,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:13:01,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:01,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:13:01,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:13:01,405 INFO L87 Difference]: Start difference. First operand 2713 states and 11696 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:01,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:01,870 INFO L93 Difference]: Finished difference Result 3335 states and 14089 transitions. [2021-06-05 05:13:01,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:13:01,870 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:13:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:01,877 INFO L225 Difference]: With dead ends: 3335 [2021-06-05 05:13:01,877 INFO L226 Difference]: Without dead ends: 3316 [2021-06-05 05:13:01,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:01,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2021-06-05 05:13:01,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 2828. [2021-06-05 05:13:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 4.305624336752741) internal successors, (12172), 2827 states have internal predecessors, (12172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 12172 transitions. [2021-06-05 05:13:01,917 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 12172 transitions. Word has length 29 [2021-06-05 05:13:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:01,917 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 12172 transitions. [2021-06-05 05:13:01,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:01,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 12172 transitions. [2021-06-05 05:13:01,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:13:01,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:01,921 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] [2021-06-05 05:13:02,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 05:13:02,121 INFO L430 AbstractCegarLoop]: === Iteration 104 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:02,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:02,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1328550890, now seen corresponding path program 25 times [2021-06-05 05:13:02,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:02,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105184627] [2021-06-05 05:13:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:02,197 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 05:13:02,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:02,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105184627] [2021-06-05 05:13:02,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105184627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:02,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487989245] [2021-06-05 05:13:02,197 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 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 05:13:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:02,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:02,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:02,262 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 05:13:02,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:02,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:02,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:02,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:22 [2021-06-05 05:13:02,345 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 05:13:02,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487989245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:02,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:02,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-06-05 05:13:02,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583251900] [2021-06-05 05:13:02,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:13:02,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:02,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:13:02,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:13:02,346 INFO L87 Difference]: Start difference. First operand 2828 states and 12172 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 05:13:02,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:02,624 INFO L93 Difference]: Finished difference Result 3219 states and 13551 transitions. [2021-06-05 05:13:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:13:02,625 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 29 [2021-06-05 05:13:02,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:02,631 INFO L225 Difference]: With dead ends: 3219 [2021-06-05 05:13:02,631 INFO L226 Difference]: Without dead ends: 3133 [2021-06-05 05:13:02,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:13:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3133 states. [2021-06-05 05:13:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3133 to 2748. [2021-06-05 05:13:02,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 4.308336366945759) internal successors, (11835), 2747 states have internal predecessors, (11835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:02,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 11835 transitions. [2021-06-05 05:13:02,669 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 11835 transitions. Word has length 29 [2021-06-05 05:13:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:02,669 INFO L482 AbstractCegarLoop]: Abstraction has 2748 states and 11835 transitions. [2021-06-05 05:13:02,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 05:13:02,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 11835 transitions. [2021-06-05 05:13:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:13:02,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:02,672 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] [2021-06-05 05:13:02,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 05:13:02,874 INFO L430 AbstractCegarLoop]: === Iteration 105 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:02,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:02,874 INFO L82 PathProgramCache]: Analyzing trace with hash -430925422, now seen corresponding path program 26 times [2021-06-05 05:13:02,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:02,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959207086] [2021-06-05 05:13:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:02,966 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 05:13:02,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:02,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959207086] [2021-06-05 05:13:02,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959207086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:02,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120978582] [2021-06-05 05:13:02,966 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 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 05:13:03,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:03,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:03,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:03,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:03,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:03,094 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 13 treesize of output 17 [2021-06-05 05:13:03,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:13:03,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:03,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:03,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 05:13:03,233 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 05:13:03,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120978582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:03,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:03,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:13:03,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993826299] [2021-06-05 05:13:03,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:13:03,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:03,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:13:03,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:13:03,234 INFO L87 Difference]: Start difference. First operand 2748 states and 11835 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:03,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:03,841 INFO L93 Difference]: Finished difference Result 2976 states and 12614 transitions. [2021-06-05 05:13:03,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:13:03,841 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:13:03,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:03,847 INFO L225 Difference]: With dead ends: 2976 [2021-06-05 05:13:03,847 INFO L226 Difference]: Without dead ends: 2961 [2021-06-05 05:13:03,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 512.2ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:13:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-06-05 05:13:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2724. [2021-06-05 05:13:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 4.3088505325009185) internal successors, (11733), 2723 states have internal predecessors, (11733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:03,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 11733 transitions. [2021-06-05 05:13:03,883 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 11733 transitions. Word has length 29 [2021-06-05 05:13:03,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:03,884 INFO L482 AbstractCegarLoop]: Abstraction has 2724 states and 11733 transitions. [2021-06-05 05:13:03,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:03,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 11733 transitions. [2021-06-05 05:13:03,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:13:03,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:03,887 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] [2021-06-05 05:13:04,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:04,088 INFO L430 AbstractCegarLoop]: === Iteration 106 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:04,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:04,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1138592478, now seen corresponding path program 27 times [2021-06-05 05:13:04,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:04,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763639701] [2021-06-05 05:13:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:04,197 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 05:13:04,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:04,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763639701] [2021-06-05 05:13:04,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763639701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:04,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660107661] [2021-06-05 05:13:04,197 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 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 05:13:04,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:13:04,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:04,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:04,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:04,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:04,364 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 15 treesize of output 19 [2021-06-05 05:13:04,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:13:04,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:04,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:04,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-05 05:13:04,451 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 05:13:04,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660107661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:04,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:04,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:13:04,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051541830] [2021-06-05 05:13:04,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:13:04,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:04,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:13:04,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:13:04,454 INFO L87 Difference]: Start difference. First operand 2724 states and 11733 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:04,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:04,809 INFO L93 Difference]: Finished difference Result 2863 states and 12191 transitions. [2021-06-05 05:13:04,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:13:04,810 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:13:04,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:04,815 INFO L225 Difference]: With dead ends: 2863 [2021-06-05 05:13:04,816 INFO L226 Difference]: Without dead ends: 2848 [2021-06-05 05:13:04,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 357.9ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:04,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-06-05 05:13:04,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 2732. [2021-06-05 05:13:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 4.304284145001831) internal successors, (11755), 2731 states have internal predecessors, (11755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:04,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 11755 transitions. [2021-06-05 05:13:04,851 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 11755 transitions. Word has length 29 [2021-06-05 05:13:04,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:04,851 INFO L482 AbstractCegarLoop]: Abstraction has 2732 states and 11755 transitions. [2021-06-05 05:13:04,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 11755 transitions. [2021-06-05 05:13:04,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:13:04,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:04,855 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] [2021-06-05 05:13:05,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 05:13:05,058 INFO L430 AbstractCegarLoop]: === Iteration 107 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:05,058 INFO L82 PathProgramCache]: Analyzing trace with hash -324196480, now seen corresponding path program 11 times [2021-06-05 05:13:05,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:05,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481315798] [2021-06-05 05:13:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:05,195 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 05:13:05,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:05,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481315798] [2021-06-05 05:13:05,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481315798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:05,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330653478] [2021-06-05 05:13:05,196 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 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 05:13:05,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:05,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:05,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:05,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:05,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:13:05,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:05,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:05,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:05,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 05:13:05,334 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 05:13:05,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330653478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:05,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:05,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 05:13:05,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159778055] [2021-06-05 05:13:05,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:13:05,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:05,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:13:05,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:13:05,335 INFO L87 Difference]: Start difference. First operand 2732 states and 11755 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) 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 05:13:05,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:05,607 INFO L93 Difference]: Finished difference Result 3429 states and 14478 transitions. [2021-06-05 05:13:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:13:05,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) 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 29 [2021-06-05 05:13:05,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:05,614 INFO L225 Difference]: With dead ends: 3429 [2021-06-05 05:13:05,614 INFO L226 Difference]: Without dead ends: 3410 [2021-06-05 05:13:05,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:13:05,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-06-05 05:13:05,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 2875. [2021-06-05 05:13:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2875 states, 2874 states have (on average 4.293667362560891) internal successors, (12340), 2874 states have internal predecessors, (12340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:05,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 12340 transitions. [2021-06-05 05:13:05,660 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 12340 transitions. Word has length 29 [2021-06-05 05:13:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:05,660 INFO L482 AbstractCegarLoop]: Abstraction has 2875 states and 12340 transitions. [2021-06-05 05:13:05,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) 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 05:13:05,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 12340 transitions. [2021-06-05 05:13:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:13:05,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:05,665 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] [2021-06-05 05:13:05,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 05:13:05,881 INFO L430 AbstractCegarLoop]: === Iteration 108 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:05,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1098158346, now seen corresponding path program 12 times [2021-06-05 05:13:05,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:05,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866513313] [2021-06-05 05:13:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:06,026 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 05:13:06,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:06,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866513313] [2021-06-05 05:13:06,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866513313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:06,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915127836] [2021-06-05 05:13:06,026 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 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 05:13:06,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:13:06,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:06,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:06,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:06,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:06,129 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 13 treesize of output 17 [2021-06-05 05:13:06,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:13:06,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:06,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:06,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 05:13:06,228 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 05:13:06,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915127836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:06,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:06,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 05:13:06,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062504914] [2021-06-05 05:13:06,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:13:06,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:06,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:13:06,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:13:06,229 INFO L87 Difference]: Start difference. First operand 2875 states and 12340 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 05:13:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:06,996 INFO L93 Difference]: Finished difference Result 3488 states and 14640 transitions. [2021-06-05 05:13:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:13:06,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 29 [2021-06-05 05:13:06,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:07,003 INFO L225 Difference]: With dead ends: 3488 [2021-06-05 05:13:07,003 INFO L226 Difference]: Without dead ends: 3457 [2021-06-05 05:13:07,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 638.8ms TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:13:07,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2021-06-05 05:13:07,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 2787. [2021-06-05 05:13:07,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 4.299353912419239) internal successors, (11978), 2786 states have internal predecessors, (11978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 11978 transitions. [2021-06-05 05:13:07,043 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 11978 transitions. Word has length 29 [2021-06-05 05:13:07,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:07,043 INFO L482 AbstractCegarLoop]: Abstraction has 2787 states and 11978 transitions. [2021-06-05 05:13:07,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 05:13:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 11978 transitions. [2021-06-05 05:13:07,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:13:07,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:07,047 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, 1, 1, 1] [2021-06-05 05:13:07,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 05:13:07,248 INFO L430 AbstractCegarLoop]: === Iteration 109 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:07,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:07,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1564614906, now seen corresponding path program 13 times [2021-06-05 05:13:07,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:07,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482686145] [2021-06-05 05:13:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:07,426 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 05:13:07,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:07,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482686145] [2021-06-05 05:13:07,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482686145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:07,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44403403] [2021-06-05 05:13:07,427 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 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 05:13:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:07,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:07,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:07,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:07,551 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 13 treesize of output 7 [2021-06-05 05:13:07,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:07,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:07,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:07,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-06-05 05:13:07,632 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 05:13:07,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44403403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:07,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:07,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:13:07,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394690043] [2021-06-05 05:13:07,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:13:07,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:07,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:13:07,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:13:07,633 INFO L87 Difference]: Start difference. First operand 2787 states and 11978 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 05:13:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:07,959 INFO L93 Difference]: Finished difference Result 2978 states and 12650 transitions. [2021-06-05 05:13:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:13:07,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 29 [2021-06-05 05:13:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:07,967 INFO L225 Difference]: With dead ends: 2978 [2021-06-05 05:13:07,967 INFO L226 Difference]: Without dead ends: 2963 [2021-06-05 05:13:07,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:13:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2021-06-05 05:13:08,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2775. [2021-06-05 05:13:08,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 4.30281182408075) internal successors, (11936), 2774 states have internal predecessors, (11936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 11936 transitions. [2021-06-05 05:13:08,017 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 11936 transitions. Word has length 29 [2021-06-05 05:13:08,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:08,017 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 11936 transitions. [2021-06-05 05:13:08,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 05:13:08,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 11936 transitions. [2021-06-05 05:13:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:13:08,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:08,022 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, 1, 1, 1] [2021-06-05 05:13:08,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:08,245 INFO L430 AbstractCegarLoop]: === Iteration 110 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:08,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:08,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1817023806, now seen corresponding path program 14 times [2021-06-05 05:13:08,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:08,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404175205] [2021-06-05 05:13:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:08,337 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 05:13:08,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:08,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404175205] [2021-06-05 05:13:08,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404175205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:08,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616819517] [2021-06-05 05:13:08,337 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 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 05:13:08,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:08,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:08,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:08,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:08,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:08,486 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 15 treesize of output 19 [2021-06-05 05:13:08,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:13:08,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:08,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:08,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-05 05:13:08,559 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 05:13:08,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616819517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:08,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:08,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:13:08,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188161722] [2021-06-05 05:13:08,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:13:08,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:08,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:13:08,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:13:08,560 INFO L87 Difference]: Start difference. First operand 2775 states and 11936 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:08,955 INFO L93 Difference]: Finished difference Result 2919 states and 12429 transitions. [2021-06-05 05:13:08,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:13:08,955 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:13:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:08,961 INFO L225 Difference]: With dead ends: 2919 [2021-06-05 05:13:08,961 INFO L226 Difference]: Without dead ends: 2904 [2021-06-05 05:13:08,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-06-05 05:13:08,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2765. [2021-06-05 05:13:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 2764 states have (on average 4.306801736613603) internal successors, (11904), 2764 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 11904 transitions. [2021-06-05 05:13:08,998 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 11904 transitions. Word has length 29 [2021-06-05 05:13:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:08,999 INFO L482 AbstractCegarLoop]: Abstraction has 2765 states and 11904 transitions. [2021-06-05 05:13:08,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 11904 transitions. [2021-06-05 05:13:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:13:09,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:09,002 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] [2021-06-05 05:13:09,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:09,203 INFO L430 AbstractCegarLoop]: === Iteration 111 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:09,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1349518276, now seen corresponding path program 15 times [2021-06-05 05:13:09,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:09,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141083246] [2021-06-05 05:13:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:09,355 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 05:13:09,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:09,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141083246] [2021-06-05 05:13:09,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141083246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:09,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114590006] [2021-06-05 05:13:09,356 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 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 05:13:09,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:13:09,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:09,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:09,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:09,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:09,474 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 05:13:09,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:13:09,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:09,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:09,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:13:09,606 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 05:13:09,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114590006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:09,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:09,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:13:09,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881476663] [2021-06-05 05:13:09,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:13:09,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:09,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:13:09,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:13:09,607 INFO L87 Difference]: Start difference. First operand 2765 states and 11904 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:10,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:10,738 INFO L93 Difference]: Finished difference Result 3739 states and 15661 transitions. [2021-06-05 05:13:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:13:10,738 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:13:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:10,745 INFO L225 Difference]: With dead ends: 3739 [2021-06-05 05:13:10,745 INFO L226 Difference]: Without dead ends: 3720 [2021-06-05 05:13:10,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1036.4ms TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:13:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2021-06-05 05:13:10,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 2904. [2021-06-05 05:13:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 4.300378918360317) internal successors, (12484), 2903 states have internal predecessors, (12484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 12484 transitions. [2021-06-05 05:13:10,794 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 12484 transitions. Word has length 29 [2021-06-05 05:13:10,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:10,794 INFO L482 AbstractCegarLoop]: Abstraction has 2904 states and 12484 transitions. [2021-06-05 05:13:10,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:10,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 12484 transitions. [2021-06-05 05:13:10,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:13:10,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:10,798 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] [2021-06-05 05:13:10,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:10,999 INFO L430 AbstractCegarLoop]: === Iteration 112 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:10,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:10,999 INFO L82 PathProgramCache]: Analyzing trace with hash 72836550, now seen corresponding path program 16 times [2021-06-05 05:13:10,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:10,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448202453] [2021-06-05 05:13:10,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:11,161 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 05:13:11,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:11,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448202453] [2021-06-05 05:13:11,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448202453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:11,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203361371] [2021-06-05 05:13:11,161 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 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 05:13:11,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:11,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:11,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:11,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:11,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:11,229 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 13 treesize of output 7 [2021-06-05 05:13:11,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:11,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:11,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:11,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 05:13:11,301 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 05:13:11,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203361371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:11,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:11,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 05:13:11,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820555738] [2021-06-05 05:13:11,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:13:11,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:11,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:13:11,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:13:11,301 INFO L87 Difference]: Start difference. First operand 2904 states and 12484 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) 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 05:13:11,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:11,534 INFO L93 Difference]: Finished difference Result 3374 states and 14254 transitions. [2021-06-05 05:13:11,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:13:11,534 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) 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 29 [2021-06-05 05:13:11,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:11,541 INFO L225 Difference]: With dead ends: 3374 [2021-06-05 05:13:11,541 INFO L226 Difference]: Without dead ends: 3343 [2021-06-05 05:13:11,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:13:11,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2021-06-05 05:13:11,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 2804. [2021-06-05 05:13:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2803 states have (on average 4.30467356403853) internal successors, (12066), 2803 states have internal predecessors, (12066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 12066 transitions. [2021-06-05 05:13:11,579 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 12066 transitions. Word has length 29 [2021-06-05 05:13:11,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:11,579 INFO L482 AbstractCegarLoop]: Abstraction has 2804 states and 12066 transitions. [2021-06-05 05:13:11,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) 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 05:13:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 12066 transitions. [2021-06-05 05:13:11,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:13:11,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:11,583 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] [2021-06-05 05:13:11,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 05:13:11,784 INFO L430 AbstractCegarLoop]: === Iteration 113 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:11,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1705030594, now seen corresponding path program 17 times [2021-06-05 05:13:11,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:11,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318808127] [2021-06-05 05:13:11,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:11,915 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 05:13:11,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:11,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318808127] [2021-06-05 05:13:11,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318808127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:11,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429044390] [2021-06-05 05:13:11,916 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 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 05:13:11,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:11,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:11,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:11,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:12,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:13:12,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:12,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:12,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:12,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 05:13:12,122 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 05:13:12,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429044390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:12,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:12,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:13:12,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332598134] [2021-06-05 05:13:12,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:13:12,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:12,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:13:12,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:13:12,123 INFO L87 Difference]: Start difference. First operand 2804 states and 12066 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 05:13:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:12,371 INFO L93 Difference]: Finished difference Result 2926 states and 12487 transitions. [2021-06-05 05:13:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:13:12,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 29 [2021-06-05 05:13:12,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:12,378 INFO L225 Difference]: With dead ends: 2926 [2021-06-05 05:13:12,378 INFO L226 Difference]: Without dead ends: 2911 [2021-06-05 05:13:12,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 278.5ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:13:12,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-06-05 05:13:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2774. [2021-06-05 05:13:12,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 4.30580598629643) internal successors, (11940), 2773 states have internal predecessors, (11940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:12,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 11940 transitions. [2021-06-05 05:13:12,417 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 11940 transitions. Word has length 29 [2021-06-05 05:13:12,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:12,417 INFO L482 AbstractCegarLoop]: Abstraction has 2774 states and 11940 transitions. [2021-06-05 05:13:12,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 05:13:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 11940 transitions. [2021-06-05 05:13:12,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:13:12,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:12,421 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] [2021-06-05 05:13:12,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 05:13:12,623 INFO L430 AbstractCegarLoop]: === Iteration 114 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:12,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:12,623 INFO L82 PathProgramCache]: Analyzing trace with hash -101608384, now seen corresponding path program 18 times [2021-06-05 05:13:12,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:12,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193202405] [2021-06-05 05:13:12,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:12,771 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 05:13:12,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:12,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193202405] [2021-06-05 05:13:12,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193202405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:12,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842203726] [2021-06-05 05:13:12,771 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 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 05:13:12,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:13:12,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:12,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:12,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:12,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:12,855 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 05:13:12,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:13:12,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:12,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:12,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:13:12,989 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 05:13:12,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842203726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:12,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:12,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:13:12,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859437] [2021-06-05 05:13:12,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:13:12,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:12,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:13:12,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:13:12,990 INFO L87 Difference]: Start difference. First operand 2774 states and 11940 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:13,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:13,971 INFO L93 Difference]: Finished difference Result 3811 states and 15865 transitions. [2021-06-05 05:13:13,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:13:13,971 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:13:13,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:13,978 INFO L225 Difference]: With dead ends: 3811 [2021-06-05 05:13:13,978 INFO L226 Difference]: Without dead ends: 3792 [2021-06-05 05:13:13,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 857.9ms TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:13:13,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2021-06-05 05:13:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 2904. [2021-06-05 05:13:14,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 4.299345504650362) internal successors, (12481), 2903 states have internal predecessors, (12481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 12481 transitions. [2021-06-05 05:13:14,021 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 12481 transitions. Word has length 29 [2021-06-05 05:13:14,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:14,021 INFO L482 AbstractCegarLoop]: Abstraction has 2904 states and 12481 transitions. [2021-06-05 05:13:14,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:14,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 12481 transitions. [2021-06-05 05:13:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:13:14,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:14,027 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] [2021-06-05 05:13:14,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 05:13:14,249 INFO L430 AbstractCegarLoop]: === Iteration 115 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:14,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:14,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1320746442, now seen corresponding path program 19 times [2021-06-05 05:13:14,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:14,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021868244] [2021-06-05 05:13:14,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:14,399 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 05:13:14,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:14,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021868244] [2021-06-05 05:13:14,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021868244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:14,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408943753] [2021-06-05 05:13:14,399 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 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 05:13:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:14,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:14,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:14,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:13:14,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:14,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:14,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:14,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 05:13:14,537 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 05:13:14,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408943753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:14,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:14,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 05:13:14,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536337541] [2021-06-05 05:13:14,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:13:14,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:14,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:13:14,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:13:14,539 INFO L87 Difference]: Start difference. First operand 2904 states and 12481 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) 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 05:13:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:14,778 INFO L93 Difference]: Finished difference Result 3369 states and 14236 transitions. [2021-06-05 05:13:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:13:14,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) 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 29 [2021-06-05 05:13:14,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:14,785 INFO L225 Difference]: With dead ends: 3369 [2021-06-05 05:13:14,785 INFO L226 Difference]: Without dead ends: 3338 [2021-06-05 05:13:14,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 231.4ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:13:14,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-06-05 05:13:14,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2804. [2021-06-05 05:13:14,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2803 states have (on average 4.3036032821976455) internal successors, (12063), 2803 states have internal predecessors, (12063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 12063 transitions. [2021-06-05 05:13:14,822 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 12063 transitions. Word has length 29 [2021-06-05 05:13:14,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:14,823 INFO L482 AbstractCegarLoop]: Abstraction has 2804 states and 12063 transitions. [2021-06-05 05:13:14,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) 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 05:13:14,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 12063 transitions. [2021-06-05 05:13:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:13:14,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:14,826 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] [2021-06-05 05:13:15,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 05:13:15,027 INFO L430 AbstractCegarLoop]: === Iteration 116 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:15,027 INFO L82 PathProgramCache]: Analyzing trace with hash -262935812, now seen corresponding path program 20 times [2021-06-05 05:13:15,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:15,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862803642] [2021-06-05 05:13:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:15,157 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 05:13:15,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:15,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862803642] [2021-06-05 05:13:15,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862803642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:15,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40528254] [2021-06-05 05:13:15,157 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 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 05:13:15,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:15,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:15,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:15,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:15,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:15,217 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 05:13:15,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:15,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:15,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:15,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-06-05 05:13:15,330 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 05:13:15,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40528254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:15,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:15,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:13:15,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694800673] [2021-06-05 05:13:15,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:13:15,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:15,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:13:15,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:13:15,330 INFO L87 Difference]: Start difference. First operand 2804 states and 12063 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 05:13:15,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:15,592 INFO L93 Difference]: Finished difference Result 2918 states and 12429 transitions. [2021-06-05 05:13:15,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:13:15,592 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 29 [2021-06-05 05:13:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:15,598 INFO L225 Difference]: With dead ends: 2918 [2021-06-05 05:13:15,598 INFO L226 Difference]: Without dead ends: 2899 [2021-06-05 05:13:15,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 298.1ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:15,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-06-05 05:13:15,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2780. [2021-06-05 05:13:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2780 states, 2779 states have (on average 4.305145735876215) internal successors, (11964), 2779 states have internal predecessors, (11964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:15,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 11964 transitions. [2021-06-05 05:13:15,635 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 11964 transitions. Word has length 29 [2021-06-05 05:13:15,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:15,635 INFO L482 AbstractCegarLoop]: Abstraction has 2780 states and 11964 transitions. [2021-06-05 05:13:15,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 05:13:15,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 11964 transitions. [2021-06-05 05:13:15,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:13:15,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:15,639 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, 1] [2021-06-05 05:13:15,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 05:13:15,840 INFO L430 AbstractCegarLoop]: === Iteration 117 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:15,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:15,840 INFO L82 PathProgramCache]: Analyzing trace with hash -701780529, now seen corresponding path program 36 times [2021-06-05 05:13:15,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:15,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262853547] [2021-06-05 05:13:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:15,858 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 05:13:15,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:15,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262853547] [2021-06-05 05:13:15,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262853547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:15,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680372244] [2021-06-05 05:13:15,858 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 05:13:15,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:13:15,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:15,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:13:15,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:15,945 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 05:13:15,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680372244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:15,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:15,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-06-05 05:13:15,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617489206] [2021-06-05 05:13:15,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:13:15,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:15,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:13:15,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:13:15,946 INFO L87 Difference]: Start difference. First operand 2780 states and 11964 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 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 05:13:16,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:16,028 INFO L93 Difference]: Finished difference Result 4234 states and 17658 transitions. [2021-06-05 05:13:16,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:13:16,028 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 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 31 [2021-06-05 05:13:16,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:16,036 INFO L225 Difference]: With dead ends: 4234 [2021-06-05 05:13:16,037 INFO L226 Difference]: Without dead ends: 4155 [2021-06-05 05:13:16,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:13:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-05 05:13:16,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3739. [2021-06-05 05:13:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 4.313001605136437) internal successors, (16122), 3738 states have internal predecessors, (16122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:16,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 16122 transitions. [2021-06-05 05:13:16,093 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 16122 transitions. Word has length 31 [2021-06-05 05:13:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:16,093 INFO L482 AbstractCegarLoop]: Abstraction has 3739 states and 16122 transitions. [2021-06-05 05:13:16,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 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 05:13:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 16122 transitions. [2021-06-05 05:13:16,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:13:16,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:16,099 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, 1] [2021-06-05 05:13:16,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:16,299 INFO L430 AbstractCegarLoop]: === Iteration 118 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:16,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:16,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1736759473, now seen corresponding path program 37 times [2021-06-05 05:13:16,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:16,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713753637] [2021-06-05 05:13:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:16,323 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 05:13:16,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:16,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713753637] [2021-06-05 05:13:16,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713753637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:16,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5021834] [2021-06-05 05:13:16,323 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 05:13:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:16,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:13:16,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:16,423 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 05:13:16,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5021834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:16,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:16,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 05:13:16,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835685689] [2021-06-05 05:13:16,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:13:16,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:16,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:13:16,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:13:16,424 INFO L87 Difference]: Start difference. First operand 3739 states and 16122 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:16,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:16,517 INFO L93 Difference]: Finished difference Result 4841 states and 20069 transitions. [2021-06-05 05:13:16,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:13:16,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:13:16,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:16,530 INFO L225 Difference]: With dead ends: 4841 [2021-06-05 05:13:16,530 INFO L226 Difference]: Without dead ends: 4724 [2021-06-05 05:13:16,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:13:16,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4724 states. [2021-06-05 05:13:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4724 to 3848. [2021-06-05 05:13:16,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 3847 states have (on average 4.288536521965168) internal successors, (16498), 3847 states have internal predecessors, (16498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 16498 transitions. [2021-06-05 05:13:16,616 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 16498 transitions. Word has length 31 [2021-06-05 05:13:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:16,616 INFO L482 AbstractCegarLoop]: Abstraction has 3848 states and 16498 transitions. [2021-06-05 05:13:16,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 16498 transitions. [2021-06-05 05:13:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:13:16,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:16,624 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, 1] [2021-06-05 05:13:16,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 05:13:16,847 INFO L430 AbstractCegarLoop]: === Iteration 119 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:16,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:16,847 INFO L82 PathProgramCache]: Analyzing trace with hash -210326895, now seen corresponding path program 38 times [2021-06-05 05:13:16,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:16,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153553057] [2021-06-05 05:13:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:16,872 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 05:13:16,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:16,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153553057] [2021-06-05 05:13:16,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153553057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:16,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742849055] [2021-06-05 05:13:16,872 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 05:13:16,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:16,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:16,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:13:16,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:16,968 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 05:13:16,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742849055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:16,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:16,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 05:13:16,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957385131] [2021-06-05 05:13:16,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:13:16,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:16,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:13:16,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:13:16,969 INFO L87 Difference]: Start difference. First operand 3848 states and 16498 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:17,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:17,139 INFO L93 Difference]: Finished difference Result 6042 states and 24692 transitions. [2021-06-05 05:13:17,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:13:17,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:13:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:17,151 INFO L225 Difference]: With dead ends: 6042 [2021-06-05 05:13:17,151 INFO L226 Difference]: Without dead ends: 5723 [2021-06-05 05:13:17,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:13:17,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5723 states. [2021-06-05 05:13:17,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5723 to 4408. [2021-06-05 05:13:17,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4408 states, 4407 states have (on average 4.309507601542999) internal successors, (18992), 4407 states have internal predecessors, (18992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 18992 transitions. [2021-06-05 05:13:17,255 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 18992 transitions. Word has length 31 [2021-06-05 05:13:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:17,256 INFO L482 AbstractCegarLoop]: Abstraction has 4408 states and 18992 transitions. [2021-06-05 05:13:17,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 18992 transitions. [2021-06-05 05:13:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:13:17,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:17,262 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, 1] [2021-06-05 05:13:17,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:17,475 INFO L430 AbstractCegarLoop]: === Iteration 120 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:17,475 INFO L82 PathProgramCache]: Analyzing trace with hash -296650923, now seen corresponding path program 39 times [2021-06-05 05:13:17,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:17,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28930618] [2021-06-05 05:13:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:17,498 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 05:13:17,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:17,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28930618] [2021-06-05 05:13:17,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28930618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:17,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539478428] [2021-06-05 05:13:17,498 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 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 05:13:17,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:13:17,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:17,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:13:17,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:17,599 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 05:13:17,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539478428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:17,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:17,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 05:13:17,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021896784] [2021-06-05 05:13:17,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:13:17,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:17,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:13:17,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:13:17,600 INFO L87 Difference]: Start difference. First operand 4408 states and 18992 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:17,676 INFO L93 Difference]: Finished difference Result 5262 states and 22054 transitions. [2021-06-05 05:13:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:13:17,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:13:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:17,687 INFO L225 Difference]: With dead ends: 5262 [2021-06-05 05:13:17,687 INFO L226 Difference]: Without dead ends: 5190 [2021-06-05 05:13:17,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:13:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2021-06-05 05:13:17,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 4400. [2021-06-05 05:13:17,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4400 states, 4399 states have (on average 4.2798363264378265) internal successors, (18827), 4399 states have internal predecessors, (18827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4400 states to 4400 states and 18827 transitions. [2021-06-05 05:13:17,758 INFO L78 Accepts]: Start accepts. Automaton has 4400 states and 18827 transitions. Word has length 31 [2021-06-05 05:13:17,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:17,758 INFO L482 AbstractCegarLoop]: Abstraction has 4400 states and 18827 transitions. [2021-06-05 05:13:17,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:17,758 INFO L276 IsEmpty]: Start isEmpty. Operand 4400 states and 18827 transitions. [2021-06-05 05:13:17,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:13:17,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:17,765 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, 1] [2021-06-05 05:13:17,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:17,965 INFO L430 AbstractCegarLoop]: === Iteration 121 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash 75547345, now seen corresponding path program 40 times [2021-06-05 05:13:17,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:17,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250919643] [2021-06-05 05:13:17,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:17,986 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 05:13:17,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:17,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250919643] [2021-06-05 05:13:17,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250919643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:17,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941290314] [2021-06-05 05:13:17,987 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 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 05:13:18,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:18,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:18,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:13:18,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:18,076 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 05:13:18,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941290314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:18,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:18,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-05 05:13:18,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096744779] [2021-06-05 05:13:18,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:13:18,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:18,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:13:18,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:13:18,077 INFO L87 Difference]: Start difference. First operand 4400 states and 18827 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:18,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:18,171 INFO L93 Difference]: Finished difference Result 7147 states and 29601 transitions. [2021-06-05 05:13:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:13:18,171 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:13:18,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:18,184 INFO L225 Difference]: With dead ends: 7147 [2021-06-05 05:13:18,184 INFO L226 Difference]: Without dead ends: 6921 [2021-06-05 05:13:18,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:13:18,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6921 states. [2021-06-05 05:13:18,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6921 to 5792. [2021-06-05 05:13:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5791 states have (on average 4.318425142462441) internal successors, (25008), 5791 states have internal predecessors, (25008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:18,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 25008 transitions. [2021-06-05 05:13:18,287 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 25008 transitions. Word has length 31 [2021-06-05 05:13:18,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:18,288 INFO L482 AbstractCegarLoop]: Abstraction has 5792 states and 25008 transitions. [2021-06-05 05:13:18,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:18,288 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 25008 transitions. [2021-06-05 05:13:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:13:18,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:18,297 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, 1] [2021-06-05 05:13:18,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-06-05 05:13:18,497 INFO L430 AbstractCegarLoop]: === Iteration 122 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:18,497 INFO L82 PathProgramCache]: Analyzing trace with hash -205490181, now seen corresponding path program 41 times [2021-06-05 05:13:18,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:18,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12020534] [2021-06-05 05:13:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:18,520 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 05:13:18,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:18,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12020534] [2021-06-05 05:13:18,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12020534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:18,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272764382] [2021-06-05 05:13:18,520 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 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 05:13:18,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:18,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:18,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:13:18,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:18,604 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 05:13:18,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272764382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:18,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:18,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 05:13:18,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108435452] [2021-06-05 05:13:18,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:13:18,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:18,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:13:18,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:13:18,605 INFO L87 Difference]: Start difference. First operand 5792 states and 25008 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 05:13:18,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:18,693 INFO L93 Difference]: Finished difference Result 7511 states and 31291 transitions. [2021-06-05 05:13:18,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:13:18,693 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 31 [2021-06-05 05:13:18,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:18,709 INFO L225 Difference]: With dead ends: 7511 [2021-06-05 05:13:18,710 INFO L226 Difference]: Without dead ends: 7409 [2021-06-05 05:13:18,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:13:18,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7409 states. [2021-06-05 05:13:18,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7409 to 5656. [2021-06-05 05:13:18,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5656 states, 5655 states have (on average 4.315296198054819) internal successors, (24403), 5655 states have internal predecessors, (24403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5656 states to 5656 states and 24403 transitions. [2021-06-05 05:13:18,811 INFO L78 Accepts]: Start accepts. Automaton has 5656 states and 24403 transitions. Word has length 31 [2021-06-05 05:13:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:18,811 INFO L482 AbstractCegarLoop]: Abstraction has 5656 states and 24403 transitions. [2021-06-05 05:13:18,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 05:13:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5656 states and 24403 transitions. [2021-06-05 05:13:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:13:18,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:18,820 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, 1] [2021-06-05 05:13:19,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:19,020 INFO L430 AbstractCegarLoop]: === Iteration 123 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:19,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:19,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1507309107, now seen corresponding path program 42 times [2021-06-05 05:13:19,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:19,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748089885] [2021-06-05 05:13:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:19,042 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 05:13:19,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:19,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748089885] [2021-06-05 05:13:19,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748089885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:19,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795407362] [2021-06-05 05:13:19,042 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 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 05:13:19,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:13:19,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:19,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:13:19,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:19,134 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 05:13:19,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795407362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:19,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:19,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 05:13:19,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872856332] [2021-06-05 05:13:19,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:13:19,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:19,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:13:19,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:13:19,135 INFO L87 Difference]: Start difference. First operand 5656 states and 24403 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 05:13:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:19,225 INFO L93 Difference]: Finished difference Result 7291 states and 30390 transitions. [2021-06-05 05:13:19,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:13:19,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 31 [2021-06-05 05:13:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:19,241 INFO L225 Difference]: With dead ends: 7291 [2021-06-05 05:13:19,241 INFO L226 Difference]: Without dead ends: 7213 [2021-06-05 05:13:19,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:13:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2021-06-05 05:13:19,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 6069. [2021-06-05 05:13:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6069 states, 6068 states have (on average 4.318226763348714) internal successors, (26203), 6068 states have internal predecessors, (26203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 26203 transitions. [2021-06-05 05:13:19,375 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 26203 transitions. Word has length 31 [2021-06-05 05:13:19,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:19,376 INFO L482 AbstractCegarLoop]: Abstraction has 6069 states and 26203 transitions. [2021-06-05 05:13:19,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 05:13:19,376 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 26203 transitions. [2021-06-05 05:13:19,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:13:19,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:19,385 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, 1] [2021-06-05 05:13:19,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:19,586 INFO L430 AbstractCegarLoop]: === Iteration 124 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:19,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:19,586 INFO L82 PathProgramCache]: Analyzing trace with hash 562379733, now seen corresponding path program 43 times [2021-06-05 05:13:19,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:19,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445139703] [2021-06-05 05:13:19,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:19,606 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 05:13:19,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:19,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445139703] [2021-06-05 05:13:19,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445139703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:19,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692590331] [2021-06-05 05:13:19,607 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 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 05:13:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:19,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:13:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:19,731 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 05:13:19,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692590331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:19,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:19,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 05:13:19,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306447999] [2021-06-05 05:13:19,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:13:19,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:19,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:13:19,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:13:19,732 INFO L87 Difference]: Start difference. First operand 6069 states and 26203 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:19,840 INFO L93 Difference]: Finished difference Result 8199 states and 34127 transitions. [2021-06-05 05:13:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:13:19,841 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:13:19,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:19,858 INFO L225 Difference]: With dead ends: 8199 [2021-06-05 05:13:19,858 INFO L226 Difference]: Without dead ends: 7998 [2021-06-05 05:13:19,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:13:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7998 states. [2021-06-05 05:13:19,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7998 to 5836. [2021-06-05 05:13:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5836 states, 5835 states have (on average 4.310025706940874) internal successors, (25149), 5835 states have internal predecessors, (25149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5836 states to 5836 states and 25149 transitions. [2021-06-05 05:13:19,975 INFO L78 Accepts]: Start accepts. Automaton has 5836 states and 25149 transitions. Word has length 31 [2021-06-05 05:13:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:19,975 INFO L482 AbstractCegarLoop]: Abstraction has 5836 states and 25149 transitions. [2021-06-05 05:13:19,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 5836 states and 25149 transitions. [2021-06-05 05:13:19,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:19,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:19,983 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, 1, 1, 1] [2021-06-05 05:13:20,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 05:13:20,184 INFO L430 AbstractCegarLoop]: === Iteration 125 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:20,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:20,184 INFO L82 PathProgramCache]: Analyzing trace with hash 236625456, now seen corresponding path program 44 times [2021-06-05 05:13:20,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:20,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763350257] [2021-06-05 05:13:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:20,373 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 05:13:20,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:20,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763350257] [2021-06-05 05:13:20,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763350257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:20,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762335246] [2021-06-05 05:13:20,374 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 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 05:13:20,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:20,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:20,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:13:20,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:20,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:20,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:13:20,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:20,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:20,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:20,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:13:20,840 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 05:13:20,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762335246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:20,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:20,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:13:20,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539848958] [2021-06-05 05:13:20,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:13:20,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:20,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:13:20,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:13:20,841 INFO L87 Difference]: Start difference. First operand 5836 states and 25149 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:22,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:22,104 INFO L93 Difference]: Finished difference Result 6478 states and 27684 transitions. [2021-06-05 05:13:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:13:22,105 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:13:22,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:22,120 INFO L225 Difference]: With dead ends: 6478 [2021-06-05 05:13:22,120 INFO L226 Difference]: Without dead ends: 6459 [2021-06-05 05:13:22,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1098.7ms TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:13:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6459 states. [2021-06-05 05:13:22,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6459 to 5939. [2021-06-05 05:13:22,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5938 states have (on average 4.303974402155608) internal successors, (25557), 5938 states have internal predecessors, (25557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:22,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 25557 transitions. [2021-06-05 05:13:22,214 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 25557 transitions. Word has length 33 [2021-06-05 05:13:22,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:22,214 INFO L482 AbstractCegarLoop]: Abstraction has 5939 states and 25557 transitions. [2021-06-05 05:13:22,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 25557 transitions. [2021-06-05 05:13:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:22,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:22,223 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, 1, 1, 1] [2021-06-05 05:13:22,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:22,424 INFO L430 AbstractCegarLoop]: === Iteration 126 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:22,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1982190470, now seen corresponding path program 45 times [2021-06-05 05:13:22,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:22,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470620503] [2021-06-05 05:13:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:22,614 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 05:13:22,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:22,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470620503] [2021-06-05 05:13:22,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470620503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:22,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228722897] [2021-06-05 05:13:22,614 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 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 05:13:22,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:13:22,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:22,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:13:22,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:22,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:22,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:13:22,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:22,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:22,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:22,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:13:23,110 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 05:13:23,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228722897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:23,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:23,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:13:23,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718120844] [2021-06-05 05:13:23,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:13:23,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:23,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:13:23,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:13:23,111 INFO L87 Difference]: Start difference. First operand 5939 states and 25557 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:24,477 INFO L93 Difference]: Finished difference Result 6497 states and 27746 transitions. [2021-06-05 05:13:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:13:24,477 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:13:24,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:24,531 INFO L225 Difference]: With dead ends: 6497 [2021-06-05 05:13:24,531 INFO L226 Difference]: Without dead ends: 6478 [2021-06-05 05:13:24,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1212.8ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:13:24,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6478 states. [2021-06-05 05:13:24,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6478 to 5942. [2021-06-05 05:13:24,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5942 states, 5941 states have (on average 4.303484261908769) internal successors, (25567), 5941 states have internal predecessors, (25567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5942 states to 5942 states and 25567 transitions. [2021-06-05 05:13:24,622 INFO L78 Accepts]: Start accepts. Automaton has 5942 states and 25567 transitions. Word has length 33 [2021-06-05 05:13:24,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:24,622 INFO L482 AbstractCegarLoop]: Abstraction has 5942 states and 25567 transitions. [2021-06-05 05:13:24,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand 5942 states and 25567 transitions. [2021-06-05 05:13:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:24,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:24,631 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, 1, 1, 1] [2021-06-05 05:13:24,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 05:13:24,832 INFO L430 AbstractCegarLoop]: === Iteration 127 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:24,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1861531658, now seen corresponding path program 46 times [2021-06-05 05:13:24,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:24,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858001346] [2021-06-05 05:13:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:25,021 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 05:13:25,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:25,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858001346] [2021-06-05 05:13:25,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858001346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:25,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449505487] [2021-06-05 05:13:25,022 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 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 05:13:25,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:25,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:25,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:13:25,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:25,317 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 05:13:25,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:25,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:25,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:25,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:13:25,394 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 05:13:25,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449505487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:25,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:25,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:13:25,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241579868] [2021-06-05 05:13:25,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:25,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:25,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:25,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:25,395 INFO L87 Difference]: Start difference. First operand 5942 states and 25567 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:26,743 INFO L93 Difference]: Finished difference Result 6457 states and 27475 transitions. [2021-06-05 05:13:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:13:26,743 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:13:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:26,758 INFO L225 Difference]: With dead ends: 6457 [2021-06-05 05:13:26,758 INFO L226 Difference]: Without dead ends: 6438 [2021-06-05 05:13:26,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1059.8ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:13:26,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2021-06-05 05:13:26,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 5990. [2021-06-05 05:13:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5990 states, 5989 states have (on average 4.307062948739356) internal successors, (25795), 5989 states have internal predecessors, (25795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:26,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 25795 transitions. [2021-06-05 05:13:26,855 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 25795 transitions. Word has length 33 [2021-06-05 05:13:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:26,856 INFO L482 AbstractCegarLoop]: Abstraction has 5990 states and 25795 transitions. [2021-06-05 05:13:26,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:26,856 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 25795 transitions. [2021-06-05 05:13:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:26,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:26,866 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, 1, 1, 1] [2021-06-05 05:13:27,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 05:13:27,067 INFO L430 AbstractCegarLoop]: === Iteration 128 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:27,067 INFO L82 PathProgramCache]: Analyzing trace with hash 278487964, now seen corresponding path program 47 times [2021-06-05 05:13:27,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:27,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797769445] [2021-06-05 05:13:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:27,346 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 05:13:27,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:27,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797769445] [2021-06-05 05:13:27,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797769445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:27,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051934241] [2021-06-05 05:13:27,347 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 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 05:13:27,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:27,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:27,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:13:27,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:27,601 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 05:13:27,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:27,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:27,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:27,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:13:27,720 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 05:13:27,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051934241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:27,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:27,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:13:27,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095173679] [2021-06-05 05:13:27,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:27,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:27,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:27,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:27,721 INFO L87 Difference]: Start difference. First operand 5990 states and 25795 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:29,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:29,370 INFO L93 Difference]: Finished difference Result 6603 states and 28103 transitions. [2021-06-05 05:13:29,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:13:29,371 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:13:29,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:29,389 INFO L225 Difference]: With dead ends: 6603 [2021-06-05 05:13:29,389 INFO L226 Difference]: Without dead ends: 6584 [2021-06-05 05:13:29,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1250.5ms TimeCoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:13:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6584 states. [2021-06-05 05:13:29,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6584 to 6014. [2021-06-05 05:13:29,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 6013 states have (on average 4.308165641110926) internal successors, (25905), 6013 states have internal predecessors, (25905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 25905 transitions. [2021-06-05 05:13:29,494 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 25905 transitions. Word has length 33 [2021-06-05 05:13:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:29,494 INFO L482 AbstractCegarLoop]: Abstraction has 6014 states and 25905 transitions. [2021-06-05 05:13:29,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 25905 transitions. [2021-06-05 05:13:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:29,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:29,504 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, 1, 1, 1] [2021-06-05 05:13:29,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 05:13:29,709 INFO L430 AbstractCegarLoop]: === Iteration 129 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:29,709 INFO L82 PathProgramCache]: Analyzing trace with hash -285109460, now seen corresponding path program 48 times [2021-06-05 05:13:29,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:29,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111754091] [2021-06-05 05:13:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:29,922 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 05:13:29,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:29,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111754091] [2021-06-05 05:13:29,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111754091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:29,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38657360] [2021-06-05 05:13:29,923 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 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 05:13:29,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:13:29,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:29,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:13:29,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:30,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:30,223 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:13:30,224 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 27 treesize of output 55 [2021-06-05 05:13:30,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:13:30,253 INFO L628 ElimStorePlain]: treesize reduction 43, result has 33.8 percent of original size [2021-06-05 05:13:30,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:30,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 05:13:30,390 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 05:13:30,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38657360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:30,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:30,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:13:30,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277254964] [2021-06-05 05:13:30,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:13:30,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:30,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:13:30,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:13:30,391 INFO L87 Difference]: Start difference. First operand 6014 states and 25905 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:31,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:31,929 INFO L93 Difference]: Finished difference Result 6445 states and 27477 transitions. [2021-06-05 05:13:31,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:13:31,929 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:13:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:31,943 INFO L225 Difference]: With dead ends: 6445 [2021-06-05 05:13:31,944 INFO L226 Difference]: Without dead ends: 6426 [2021-06-05 05:13:31,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1361.4ms TimeCoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:13:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6426 states. [2021-06-05 05:13:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6426 to 6024. [2021-06-05 05:13:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6024 states, 6023 states have (on average 4.307155902374232) internal successors, (25942), 6023 states have internal predecessors, (25942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 25942 transitions. [2021-06-05 05:13:32,039 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 25942 transitions. Word has length 33 [2021-06-05 05:13:32,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:32,039 INFO L482 AbstractCegarLoop]: Abstraction has 6024 states and 25942 transitions. [2021-06-05 05:13:32,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:32,039 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 25942 transitions. [2021-06-05 05:13:32,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:32,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:32,049 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, 1, 1, 1] [2021-06-05 05:13:32,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:32,253 INFO L430 AbstractCegarLoop]: === Iteration 130 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:32,253 INFO L82 PathProgramCache]: Analyzing trace with hash -656334466, now seen corresponding path program 49 times [2021-06-05 05:13:32,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:32,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112109905] [2021-06-05 05:13:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:32,447 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 05:13:32,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:32,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112109905] [2021-06-05 05:13:32,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112109905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:32,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890940415] [2021-06-05 05:13:32,447 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 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 05:13:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:32,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:13:32,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:32,676 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 05:13:32,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:32,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:32,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:32,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:13:32,766 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 05:13:32,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890940415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:32,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:32,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:13:32,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589887963] [2021-06-05 05:13:32,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:32,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:32,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:32,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:32,767 INFO L87 Difference]: Start difference. First operand 6024 states and 25942 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:33,808 INFO L93 Difference]: Finished difference Result 6948 states and 29535 transitions. [2021-06-05 05:13:33,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:13:33,809 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:13:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:33,825 INFO L225 Difference]: With dead ends: 6948 [2021-06-05 05:13:33,825 INFO L226 Difference]: Without dead ends: 6933 [2021-06-05 05:13:33,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 771.6ms TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:13:33,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6933 states. [2021-06-05 05:13:33,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6933 to 6087. [2021-06-05 05:13:33,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6087 states, 6086 states have (on average 4.306112389089714) internal successors, (26207), 6086 states have internal predecessors, (26207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:33,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6087 states to 6087 states and 26207 transitions. [2021-06-05 05:13:33,930 INFO L78 Accepts]: Start accepts. Automaton has 6087 states and 26207 transitions. Word has length 33 [2021-06-05 05:13:33,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:33,930 INFO L482 AbstractCegarLoop]: Abstraction has 6087 states and 26207 transitions. [2021-06-05 05:13:33,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:33,931 INFO L276 IsEmpty]: Start isEmpty. Operand 6087 states and 26207 transitions. [2021-06-05 05:13:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:33,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:33,940 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, 1, 1, 1] [2021-06-05 05:13:34,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 05:13:34,141 INFO L430 AbstractCegarLoop]: === Iteration 131 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:34,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:34,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1970239388, now seen corresponding path program 50 times [2021-06-05 05:13:34,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:34,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468321829] [2021-06-05 05:13:34,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:34,336 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 05:13:34,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:34,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468321829] [2021-06-05 05:13:34,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468321829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:34,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932389880] [2021-06-05 05:13:34,337 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 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 05:13:34,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:34,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:34,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:13:34,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:34,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:34,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:13:34,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:34,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:34,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:34,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 05:13:34,748 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 05:13:34,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932389880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:34,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:34,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:13:34,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030517422] [2021-06-05 05:13:34,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:13:34,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:34,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:13:34,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:13:34,750 INFO L87 Difference]: Start difference. First operand 6087 states and 26207 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 05:13:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:35,757 INFO L93 Difference]: Finished difference Result 6483 states and 27696 transitions. [2021-06-05 05:13:35,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:13:35,757 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 05:13:35,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:35,772 INFO L225 Difference]: With dead ends: 6483 [2021-06-05 05:13:35,772 INFO L226 Difference]: Without dead ends: 6469 [2021-06-05 05:13:35,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 924.7ms TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:13:35,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2021-06-05 05:13:35,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 6073. [2021-06-05 05:13:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6073 states, 6072 states have (on average 4.308959156785244) internal successors, (26164), 6072 states have internal predecessors, (26164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:35,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6073 states to 6073 states and 26164 transitions. [2021-06-05 05:13:35,865 INFO L78 Accepts]: Start accepts. Automaton has 6073 states and 26164 transitions. Word has length 33 [2021-06-05 05:13:35,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:35,865 INFO L482 AbstractCegarLoop]: Abstraction has 6073 states and 26164 transitions. [2021-06-05 05:13:35,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 05:13:35,866 INFO L276 IsEmpty]: Start isEmpty. Operand 6073 states and 26164 transitions. [2021-06-05 05:13:35,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:35,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:35,874 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, 1, 1, 1] [2021-06-05 05:13:36,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 05:13:36,075 INFO L430 AbstractCegarLoop]: === Iteration 132 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:36,075 INFO L82 PathProgramCache]: Analyzing trace with hash -941434896, now seen corresponding path program 51 times [2021-06-05 05:13:36,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:36,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542981939] [2021-06-05 05:13:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:36,290 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 05:13:36,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:36,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542981939] [2021-06-05 05:13:36,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542981939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:36,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499892822] [2021-06-05 05:13:36,290 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 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 05:13:36,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:13:36,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:36,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:13:36,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:36,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:36,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:13:36,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:36,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:36,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:36,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:13:36,754 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 05:13:36,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499892822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:36,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:36,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:13:36,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671976837] [2021-06-05 05:13:36,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:13:36,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:36,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:13:36,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:13:36,755 INFO L87 Difference]: Start difference. First operand 6073 states and 26164 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:38,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:38,042 INFO L93 Difference]: Finished difference Result 6646 states and 28417 transitions. [2021-06-05 05:13:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:13:38,042 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:13:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:38,057 INFO L225 Difference]: With dead ends: 6646 [2021-06-05 05:13:38,057 INFO L226 Difference]: Without dead ends: 6627 [2021-06-05 05:13:38,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1105.7ms TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:13:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6627 states. [2021-06-05 05:13:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6627 to 6073. [2021-06-05 05:13:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6073 states, 6072 states have (on average 4.308959156785244) internal successors, (26164), 6072 states have internal predecessors, (26164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:38,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6073 states to 6073 states and 26164 transitions. [2021-06-05 05:13:38,156 INFO L78 Accepts]: Start accepts. Automaton has 6073 states and 26164 transitions. Word has length 33 [2021-06-05 05:13:38,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:38,156 INFO L482 AbstractCegarLoop]: Abstraction has 6073 states and 26164 transitions. [2021-06-05 05:13:38,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:38,156 INFO L276 IsEmpty]: Start isEmpty. Operand 6073 states and 26164 transitions. [2021-06-05 05:13:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:38,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:38,166 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, 1, 1, 1] [2021-06-05 05:13:38,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 05:13:38,374 INFO L430 AbstractCegarLoop]: === Iteration 133 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:38,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:38,374 INFO L82 PathProgramCache]: Analyzing trace with hash 755646114, now seen corresponding path program 52 times [2021-06-05 05:13:38,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:38,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238273849] [2021-06-05 05:13:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:38,576 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 05:13:38,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:38,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238273849] [2021-06-05 05:13:38,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238273849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:38,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909974206] [2021-06-05 05:13:38,577 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 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 05:13:38,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:38,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:38,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:13:38,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:38,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:38,857 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 28 treesize of output 12 [2021-06-05 05:13:38,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:38,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:38,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:38,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:13:38,942 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 05:13:38,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909974206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:38,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:38,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:13:38,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610103208] [2021-06-05 05:13:38,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:38,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:38,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:38,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:38,944 INFO L87 Difference]: Start difference. First operand 6073 states and 26164 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:40,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:40,270 INFO L93 Difference]: Finished difference Result 7065 states and 30042 transitions. [2021-06-05 05:13:40,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:13:40,270 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:13:40,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:40,286 INFO L225 Difference]: With dead ends: 7065 [2021-06-05 05:13:40,286 INFO L226 Difference]: Without dead ends: 7030 [2021-06-05 05:13:40,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1030.1ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:13:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7030 states. [2021-06-05 05:13:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7030 to 6011. [2021-06-05 05:13:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6011 states, 6010 states have (on average 4.31297836938436) internal successors, (25921), 6010 states have internal predecessors, (25921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:40,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6011 states to 6011 states and 25921 transitions. [2021-06-05 05:13:40,387 INFO L78 Accepts]: Start accepts. Automaton has 6011 states and 25921 transitions. Word has length 33 [2021-06-05 05:13:40,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:40,387 INFO L482 AbstractCegarLoop]: Abstraction has 6011 states and 25921 transitions. [2021-06-05 05:13:40,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:40,388 INFO L276 IsEmpty]: Start isEmpty. Operand 6011 states and 25921 transitions. [2021-06-05 05:13:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:40,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:40,398 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, 1, 1, 1] [2021-06-05 05:13:40,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:40,598 INFO L430 AbstractCegarLoop]: === Iteration 134 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:40,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1043651872, now seen corresponding path program 53 times [2021-06-05 05:13:40,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:40,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094734383] [2021-06-05 05:13:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:40,787 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 05:13:40,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:40,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094734383] [2021-06-05 05:13:40,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094734383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:40,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560683804] [2021-06-05 05:13:40,787 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 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 05:13:40,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:13:40,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:40,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:13:40,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:40,966 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 05:13:40,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:40,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:40,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:40,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 05:13:41,100 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 05:13:41,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560683804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:41,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:41,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:13:41,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869944593] [2021-06-05 05:13:41,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:41,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:41,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:41,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:41,101 INFO L87 Difference]: Start difference. First operand 6011 states and 25921 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:42,507 INFO L93 Difference]: Finished difference Result 7566 states and 32115 transitions. [2021-06-05 05:13:42,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:13:42,507 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:13:42,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:42,524 INFO L225 Difference]: With dead ends: 7566 [2021-06-05 05:13:42,524 INFO L226 Difference]: Without dead ends: 7516 [2021-06-05 05:13:42,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1134.9ms TimeCoverageRelationStatistics Valid=319, Invalid=1751, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:13:42,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2021-06-05 05:13:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 6306. [2021-06-05 05:13:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6306 states, 6305 states have (on average 4.32244250594766) internal successors, (27253), 6305 states have internal predecessors, (27253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6306 states to 6306 states and 27253 transitions. [2021-06-05 05:13:42,703 INFO L78 Accepts]: Start accepts. Automaton has 6306 states and 27253 transitions. Word has length 33 [2021-06-05 05:13:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:42,703 INFO L482 AbstractCegarLoop]: Abstraction has 6306 states and 27253 transitions. [2021-06-05 05:13:42,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 6306 states and 27253 transitions. [2021-06-05 05:13:42,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:42,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:42,714 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, 1, 1, 1] [2021-06-05 05:13:42,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:42,914 INFO L430 AbstractCegarLoop]: === Iteration 135 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:42,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:42,915 INFO L82 PathProgramCache]: Analyzing trace with hash 259620734, now seen corresponding path program 54 times [2021-06-05 05:13:42,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:42,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220770314] [2021-06-05 05:13:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:43,090 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 05:13:43,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:43,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220770314] [2021-06-05 05:13:43,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220770314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:43,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502511300] [2021-06-05 05:13:43,090 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 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 05:13:43,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:13:43,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:43,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:13:43,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:43,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:43,296 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:13:43,296 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 29 treesize of output 57 [2021-06-05 05:13:43,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:43,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:43,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:43,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 05:13:43,551 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 05:13:43,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502511300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:43,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:43,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:13:43,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353966146] [2021-06-05 05:13:43,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:13:43,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:43,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:13:43,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:13:43,552 INFO L87 Difference]: Start difference. First operand 6306 states and 27253 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:45,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:45,102 INFO L93 Difference]: Finished difference Result 7086 states and 30136 transitions. [2021-06-05 05:13:45,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:13:45,102 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:13:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:45,118 INFO L225 Difference]: With dead ends: 7086 [2021-06-05 05:13:45,118 INFO L226 Difference]: Without dead ends: 7064 [2021-06-05 05:13:45,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1182.0ms TimeCoverageRelationStatistics Valid=321, Invalid=1935, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:13:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7064 states. [2021-06-05 05:13:45,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7064 to 6315. [2021-06-05 05:13:45,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6315 states, 6314 states have (on average 4.31913208742477) internal successors, (27271), 6314 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 05:13:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 27271 transitions. [2021-06-05 05:13:45,223 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 27271 transitions. Word has length 33 [2021-06-05 05:13:45,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:45,224 INFO L482 AbstractCegarLoop]: Abstraction has 6315 states and 27271 transitions. [2021-06-05 05:13:45,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:45,224 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 27271 transitions. [2021-06-05 05:13:45,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:45,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:45,234 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, 1, 1, 1] [2021-06-05 05:13:45,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:45,434 INFO L430 AbstractCegarLoop]: === Iteration 136 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:45,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:45,435 INFO L82 PathProgramCache]: Analyzing trace with hash -639741338, now seen corresponding path program 55 times [2021-06-05 05:13:45,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:45,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869570265] [2021-06-05 05:13:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:45,677 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 05:13:45,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:45,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869570265] [2021-06-05 05:13:45,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869570265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:45,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033415197] [2021-06-05 05:13:45,677 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 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 05:13:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:45,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:13:45,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:45,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:45,948 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 29 treesize of output 13 [2021-06-05 05:13:45,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:45,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:45,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:45,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:13:46,087 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 05:13:46,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033415197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:46,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:46,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:13:46,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964398096] [2021-06-05 05:13:46,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:46,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:46,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:46,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:46,088 INFO L87 Difference]: Start difference. First operand 6315 states and 27271 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:46,603 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-05 05:13:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:48,511 INFO L93 Difference]: Finished difference Result 7847 states and 33031 transitions. [2021-06-05 05:13:48,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:13:48,511 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:13:48,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:48,529 INFO L225 Difference]: With dead ends: 7847 [2021-06-05 05:13:48,529 INFO L226 Difference]: Without dead ends: 7796 [2021-06-05 05:13:48,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 2017.5ms TimeCoverageRelationStatistics Valid=463, Invalid=2959, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:13:48,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7796 states. [2021-06-05 05:13:48,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7796 to 6274. [2021-06-05 05:13:48,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6274 states, 6273 states have (on average 4.320102024549657) internal successors, (27100), 6273 states have internal predecessors, (27100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6274 states to 6274 states and 27100 transitions. [2021-06-05 05:13:48,641 INFO L78 Accepts]: Start accepts. Automaton has 6274 states and 27100 transitions. Word has length 33 [2021-06-05 05:13:48,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:48,641 INFO L482 AbstractCegarLoop]: Abstraction has 6274 states and 27100 transitions. [2021-06-05 05:13:48,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:48,641 INFO L276 IsEmpty]: Start isEmpty. Operand 6274 states and 27100 transitions. [2021-06-05 05:13:48,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:48,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:48,651 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, 1, 1, 1] [2021-06-05 05:13:48,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 05:13:48,851 INFO L430 AbstractCegarLoop]: === Iteration 137 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:48,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:48,852 INFO L82 PathProgramCache]: Analyzing trace with hash -2025903986, now seen corresponding path program 56 times [2021-06-05 05:13:48,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:48,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131329509] [2021-06-05 05:13:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:49,165 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 05:13:49,226 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 05:13:49,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:49,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131329509] [2021-06-05 05:13:49,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131329509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:49,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205845080] [2021-06-05 05:13:49,226 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 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 05:13:49,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:49,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:49,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:13:49,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:49,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:49,447 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 05:13:49,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:49,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:49,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:49,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 05:13:49,681 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 05:13:49,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205845080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:49,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:49,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:13:49,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175517361] [2021-06-05 05:13:49,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:13:49,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:49,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:13:49,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:13:49,682 INFO L87 Difference]: Start difference. First operand 6274 states and 27100 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:51,940 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 05:13:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:52,483 INFO L93 Difference]: Finished difference Result 7830 states and 32405 transitions. [2021-06-05 05:13:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:13:52,483 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:13:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:52,501 INFO L225 Difference]: With dead ends: 7830 [2021-06-05 05:13:52,501 INFO L226 Difference]: Without dead ends: 7800 [2021-06-05 05:13:52,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 2672.6ms TimeCoverageRelationStatistics Valid=379, Invalid=3043, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:13:52,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2021-06-05 05:13:52,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6304. [2021-06-05 05:13:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6304 states, 6303 states have (on average 4.32206885610027) internal successors, (27242), 6303 states have internal predecessors, (27242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6304 states to 6304 states and 27242 transitions. [2021-06-05 05:13:52,613 INFO L78 Accepts]: Start accepts. Automaton has 6304 states and 27242 transitions. Word has length 33 [2021-06-05 05:13:52,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:52,613 INFO L482 AbstractCegarLoop]: Abstraction has 6304 states and 27242 transitions. [2021-06-05 05:13:52,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:52,613 INFO L276 IsEmpty]: Start isEmpty. Operand 6304 states and 27242 transitions. [2021-06-05 05:13:52,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:52,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:52,624 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, 1, 1, 1] [2021-06-05 05:13:52,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 05:13:52,825 INFO L430 AbstractCegarLoop]: === Iteration 138 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:52,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:52,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1220290908, now seen corresponding path program 57 times [2021-06-05 05:13:52,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:52,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738042724] [2021-06-05 05:13:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:52,993 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 05:13:52,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:52,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738042724] [2021-06-05 05:13:52,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738042724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:52,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545061942] [2021-06-05 05:13:52,993 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 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 05:13:53,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:13:53,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:53,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:13:53,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:53,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:53,202 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:13:53,202 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 29 treesize of output 57 [2021-06-05 05:13:53,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:53,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:53,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:53,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 05:13:53,473 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 05:13:53,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545061942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:53,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:53,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:13:53,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871189939] [2021-06-05 05:13:53,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:13:53,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:53,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:13:53,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:13:53,474 INFO L87 Difference]: Start difference. First operand 6304 states and 27242 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:55,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:55,677 INFO L93 Difference]: Finished difference Result 7675 states and 32393 transitions. [2021-06-05 05:13:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:13:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:13:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:55,694 INFO L225 Difference]: With dead ends: 7675 [2021-06-05 05:13:55,695 INFO L226 Difference]: Without dead ends: 7613 [2021-06-05 05:13:55,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1853.0ms TimeCoverageRelationStatistics Valid=402, Invalid=2790, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:13:55,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7613 states. [2021-06-05 05:13:55,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7613 to 6435. [2021-06-05 05:13:55,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6435 states, 6434 states have (on average 4.327012744793286) internal successors, (27840), 6434 states have internal predecessors, (27840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6435 states to 6435 states and 27840 transitions. [2021-06-05 05:13:55,803 INFO L78 Accepts]: Start accepts. Automaton has 6435 states and 27840 transitions. Word has length 33 [2021-06-05 05:13:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:55,803 INFO L482 AbstractCegarLoop]: Abstraction has 6435 states and 27840 transitions. [2021-06-05 05:13:55,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 6435 states and 27840 transitions. [2021-06-05 05:13:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:55,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:55,813 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, 1, 1, 1] [2021-06-05 05:13:56,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 05:13:56,013 INFO L430 AbstractCegarLoop]: === Iteration 139 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:56,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:56,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1771403782, now seen corresponding path program 58 times [2021-06-05 05:13:56,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:56,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484746162] [2021-06-05 05:13:56,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:56,222 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 05:13:56,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:56,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484746162] [2021-06-05 05:13:56,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484746162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:56,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436475454] [2021-06-05 05:13:56,223 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 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 05:13:56,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:56,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:56,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:13:56,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:56,401 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 05:13:56,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:56,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:56,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:56,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 05:13:56,518 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 05:13:56,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436475454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:56,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:56,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:13:56,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555864361] [2021-06-05 05:13:56,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:56,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:56,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:56,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:56,519 INFO L87 Difference]: Start difference. First operand 6435 states and 27840 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:57,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:57,615 INFO L93 Difference]: Finished difference Result 7805 states and 32976 transitions. [2021-06-05 05:13:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:13:57,616 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:13:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:57,633 INFO L225 Difference]: With dead ends: 7805 [2021-06-05 05:13:57,633 INFO L226 Difference]: Without dead ends: 7781 [2021-06-05 05:13:57,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 832.9ms TimeCoverageRelationStatistics Valid=267, Invalid=1455, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:13:57,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7781 states. [2021-06-05 05:13:57,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7781 to 6489. [2021-06-05 05:13:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6489 states, 6488 states have (on average 4.331072749691739) internal successors, (28100), 6488 states have internal predecessors, (28100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6489 states to 6489 states and 28100 transitions. [2021-06-05 05:13:57,749 INFO L78 Accepts]: Start accepts. Automaton has 6489 states and 28100 transitions. Word has length 33 [2021-06-05 05:13:57,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:57,749 INFO L482 AbstractCegarLoop]: Abstraction has 6489 states and 28100 transitions. [2021-06-05 05:13:57,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:57,749 INFO L276 IsEmpty]: Start isEmpty. Operand 6489 states and 28100 transitions. [2021-06-05 05:13:57,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:57,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:57,759 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, 1, 1, 1] [2021-06-05 05:13:57,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:57,960 INFO L430 AbstractCegarLoop]: === Iteration 140 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:57,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:57,960 INFO L82 PathProgramCache]: Analyzing trace with hash 855170072, now seen corresponding path program 59 times [2021-06-05 05:13:57,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:57,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682856974] [2021-06-05 05:13:57,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:58,129 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 05:13:58,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:58,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682856974] [2021-06-05 05:13:58,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682856974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:58,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944547440] [2021-06-05 05:13:58,130 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 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 05:13:58,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:13:58,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:58,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:13:58,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:58,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:58,333 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 29 treesize of output 13 [2021-06-05 05:13:58,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:58,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:58,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:58,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:13:58,440 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 05:13:58,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944547440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:58,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:58,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:13:58,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69125313] [2021-06-05 05:13:58,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:58,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:58,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:58,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:58,441 INFO L87 Difference]: Start difference. First operand 6489 states and 28100 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:13:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:59,509 INFO L93 Difference]: Finished difference Result 7827 states and 33033 transitions. [2021-06-05 05:13:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:13:59,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:13:59,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:59,526 INFO L225 Difference]: With dead ends: 7827 [2021-06-05 05:13:59,526 INFO L226 Difference]: Without dead ends: 7771 [2021-06-05 05:13:59,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 827.9ms TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:13:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2021-06-05 05:13:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 6483. [2021-06-05 05:13:59,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6483 states, 6482 states have (on average 4.333076211045974) internal successors, (28087), 6482 states have internal predecessors, (28087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 28087 transitions. [2021-06-05 05:13:59,638 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 28087 transitions. Word has length 33 [2021-06-05 05:13:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:59,638 INFO L482 AbstractCegarLoop]: Abstraction has 6483 states and 28087 transitions. [2021-06-05 05:13:59,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:13:59,638 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 28087 transitions. [2021-06-05 05:13:59,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:13:59,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:59,649 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, 1, 1, 1] [2021-06-05 05:13:59,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-05 05:13:59,849 INFO L430 AbstractCegarLoop]: === Iteration 141 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1739523228, now seen corresponding path program 60 times [2021-06-05 05:13:59,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:59,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6904889] [2021-06-05 05:13:59,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:00,054 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 05:14:00,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:00,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6904889] [2021-06-05 05:14:00,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6904889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:00,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133235432] [2021-06-05 05:14:00,055 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 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 05:14:00,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:14:00,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:00,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:14:00,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:00,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:00,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:00,259 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 25 treesize of output 31 [2021-06-05 05:14:00,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:00,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:00,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:00,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-05 05:14:00,451 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 05:14:00,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133235432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:00,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:00,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:14:00,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762363843] [2021-06-05 05:14:00,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:14:00,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:00,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:14:00,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:14:00,451 INFO L87 Difference]: Start difference. First operand 6483 states and 28087 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:02,009 INFO L93 Difference]: Finished difference Result 6950 states and 29841 transitions. [2021-06-05 05:14:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:14:02,009 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:02,024 INFO L225 Difference]: With dead ends: 6950 [2021-06-05 05:14:02,024 INFO L226 Difference]: Without dead ends: 6891 [2021-06-05 05:14:02,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1337.5ms TimeCoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:14:02,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2021-06-05 05:14:02,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 6471. [2021-06-05 05:14:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6471 states, 6470 states have (on average 4.332921174652241) internal successors, (28034), 6470 states have internal predecessors, (28034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6471 states to 6471 states and 28034 transitions. [2021-06-05 05:14:02,130 INFO L78 Accepts]: Start accepts. Automaton has 6471 states and 28034 transitions. Word has length 33 [2021-06-05 05:14:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:02,130 INFO L482 AbstractCegarLoop]: Abstraction has 6471 states and 28034 transitions. [2021-06-05 05:14:02,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 6471 states and 28034 transitions. [2021-06-05 05:14:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:02,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:02,141 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, 1, 1, 1] [2021-06-05 05:14:02,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 05:14:02,342 INFO L430 AbstractCegarLoop]: === Iteration 142 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:02,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:02,342 INFO L82 PathProgramCache]: Analyzing trace with hash -639895564, now seen corresponding path program 61 times [2021-06-05 05:14:02,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:02,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863749703] [2021-06-05 05:14:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:02,503 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 05:14:02,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:02,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863749703] [2021-06-05 05:14:02,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863749703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:02,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271593497] [2021-06-05 05:14:02,503 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 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 05:14:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:02,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:02,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:02,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:02,764 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 28 treesize of output 12 [2021-06-05 05:14:02,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:02,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:02,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:02,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:14:02,844 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 05:14:02,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271593497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:02,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:02,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:14:02,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615384665] [2021-06-05 05:14:02,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:02,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:02,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:02,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:02,845 INFO L87 Difference]: Start difference. First operand 6471 states and 28034 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:04,099 INFO L93 Difference]: Finished difference Result 8470 states and 35739 transitions. [2021-06-05 05:14:04,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:14:04,099 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:04,118 INFO L225 Difference]: With dead ends: 8470 [2021-06-05 05:14:04,118 INFO L226 Difference]: Without dead ends: 8420 [2021-06-05 05:14:04,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1089.4ms TimeCoverageRelationStatistics Valid=304, Invalid=1952, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:14:04,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8420 states. [2021-06-05 05:14:04,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8420 to 6765. [2021-06-05 05:14:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6765 states, 6764 states have (on average 4.344766410408043) internal successors, (29388), 6764 states have internal predecessors, (29388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6765 states to 6765 states and 29388 transitions. [2021-06-05 05:14:04,243 INFO L78 Accepts]: Start accepts. Automaton has 6765 states and 29388 transitions. Word has length 33 [2021-06-05 05:14:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:04,243 INFO L482 AbstractCegarLoop]: Abstraction has 6765 states and 29388 transitions. [2021-06-05 05:14:04,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 6765 states and 29388 transitions. [2021-06-05 05:14:04,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:04,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:04,254 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, 1, 1, 1] [2021-06-05 05:14:04,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 05:14:04,454 INFO L430 AbstractCegarLoop]: === Iteration 143 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:04,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:04,454 INFO L82 PathProgramCache]: Analyzing trace with hash 663377042, now seen corresponding path program 62 times [2021-06-05 05:14:04,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:04,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310928784] [2021-06-05 05:14:04,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:04,619 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 05:14:04,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:04,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310928784] [2021-06-05 05:14:04,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310928784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:04,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526943038] [2021-06-05 05:14:04,619 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 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 05:14:04,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:04,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:04,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:04,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:04,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:04,854 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:14:04,854 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 27 treesize of output 55 [2021-06-05 05:14:04,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:14:04,902 INFO L628 ElimStorePlain]: treesize reduction 74, result has 22.9 percent of original size [2021-06-05 05:14:04,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:04,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 05:14:05,040 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 05:14:05,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526943038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:05,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:05,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:14:05,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783742891] [2021-06-05 05:14:05,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:14:05,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:05,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:14:05,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:14:05,041 INFO L87 Difference]: Start difference. First operand 6765 states and 29388 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:06,578 INFO L93 Difference]: Finished difference Result 8081 states and 34208 transitions. [2021-06-05 05:14:06,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:14:06,578 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:06,596 INFO L225 Difference]: With dead ends: 8081 [2021-06-05 05:14:06,596 INFO L226 Difference]: Without dead ends: 8059 [2021-06-05 05:14:06,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1171.0ms TimeCoverageRelationStatistics Valid=339, Invalid=2417, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:14:06,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8059 states. [2021-06-05 05:14:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8059 to 6725. [2021-06-05 05:14:06,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6725 states, 6724 states have (on average 4.343694229625223) internal successors, (29207), 6724 states have internal predecessors, (29207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6725 states to 6725 states and 29207 transitions. [2021-06-05 05:14:06,712 INFO L78 Accepts]: Start accepts. Automaton has 6725 states and 29207 transitions. Word has length 33 [2021-06-05 05:14:06,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:06,712 INFO L482 AbstractCegarLoop]: Abstraction has 6725 states and 29207 transitions. [2021-06-05 05:14:06,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:06,712 INFO L276 IsEmpty]: Start isEmpty. Operand 6725 states and 29207 transitions. [2021-06-05 05:14:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:06,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:06,723 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, 1, 1, 1] [2021-06-05 05:14:06,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 05:14:06,923 INFO L430 AbstractCegarLoop]: === Iteration 144 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:06,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:06,923 INFO L82 PathProgramCache]: Analyzing trace with hash -235985030, now seen corresponding path program 63 times [2021-06-05 05:14:06,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:06,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413039169] [2021-06-05 05:14:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:07,167 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 05:14:07,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:07,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413039169] [2021-06-05 05:14:07,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413039169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:07,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329657040] [2021-06-05 05:14:07,167 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 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 05:14:07,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:14:07,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:07,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:07,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:07,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:07,402 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:14:07,402 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 05:14:07,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:14:07,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:07,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:07,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 05:14:07,572 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 05:14:07,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329657040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:07,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:07,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:14:07,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756099643] [2021-06-05 05:14:07,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:14:07,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:07,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:14:07,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:14:07,573 INFO L87 Difference]: Start difference. First operand 6725 states and 29207 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:08,334 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-06-05 05:14:10,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:10,628 INFO L93 Difference]: Finished difference Result 8076 states and 34225 transitions. [2021-06-05 05:14:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:14:10,628 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:10,646 INFO L225 Difference]: With dead ends: 8076 [2021-06-05 05:14:10,646 INFO L226 Difference]: Without dead ends: 8046 [2021-06-05 05:14:10,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 2617.1ms TimeCoverageRelationStatistics Valid=483, Invalid=4073, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:14:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8046 states. [2021-06-05 05:14:10,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8046 to 6676. [2021-06-05 05:14:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6676 states, 6675 states have (on average 4.3417228464419475) internal successors, (28981), 6675 states have internal predecessors, (28981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6676 states to 6676 states and 28981 transitions. [2021-06-05 05:14:10,753 INFO L78 Accepts]: Start accepts. Automaton has 6676 states and 28981 transitions. Word has length 33 [2021-06-05 05:14:10,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:10,753 INFO L482 AbstractCegarLoop]: Abstraction has 6676 states and 28981 transitions. [2021-06-05 05:14:10,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 6676 states and 28981 transitions. [2021-06-05 05:14:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:10,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:10,763 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, 1, 1, 1] [2021-06-05 05:14:10,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 05:14:10,964 INFO L430 AbstractCegarLoop]: === Iteration 145 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:10,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:10,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2016583332, now seen corresponding path program 64 times [2021-06-05 05:14:10,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:10,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489141710] [2021-06-05 05:14:10,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:11,223 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 05:14:11,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:11,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489141710] [2021-06-05 05:14:11,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489141710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:11,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847964090] [2021-06-05 05:14:11,224 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 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 05:14:11,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:11,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:11,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:11,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:11,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:11,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-05 05:14:11,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:11,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:11,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:11,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:14:11,530 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 05:14:11,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847964090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:11,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:11,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:14:11,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882741076] [2021-06-05 05:14:11,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:11,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:11,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:11,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:11,530 INFO L87 Difference]: Start difference. First operand 6676 states and 28981 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:13,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:13,356 INFO L93 Difference]: Finished difference Result 8754 states and 36818 transitions. [2021-06-05 05:14:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:14:13,356 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:13,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:13,375 INFO L225 Difference]: With dead ends: 8754 [2021-06-05 05:14:13,376 INFO L226 Difference]: Without dead ends: 8710 [2021-06-05 05:14:13,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1484.2ms TimeCoverageRelationStatistics Valid=408, Invalid=2672, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:14:13,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8710 states. [2021-06-05 05:14:13,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8710 to 6742. [2021-06-05 05:14:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6742 states, 6741 states have (on average 4.34816792760718) internal successors, (29311), 6741 states have internal predecessors, (29311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6742 states to 6742 states and 29311 transitions. [2021-06-05 05:14:13,570 INFO L78 Accepts]: Start accepts. Automaton has 6742 states and 29311 transitions. Word has length 33 [2021-06-05 05:14:13,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:13,570 INFO L482 AbstractCegarLoop]: Abstraction has 6742 states and 29311 transitions. [2021-06-05 05:14:13,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:13,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6742 states and 29311 transitions. [2021-06-05 05:14:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:13,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:13,581 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, 1, 1, 1] [2021-06-05 05:14:13,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 05:14:13,781 INFO L430 AbstractCegarLoop]: === Iteration 146 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:13,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:13,782 INFO L82 PathProgramCache]: Analyzing trace with hash -120663244, now seen corresponding path program 65 times [2021-06-05 05:14:13,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:13,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596490313] [2021-06-05 05:14:13,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:13,958 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 05:14:13,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:13,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596490313] [2021-06-05 05:14:13,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596490313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:13,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346734000] [2021-06-05 05:14:13,959 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 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 05:14:13,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:14:13,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:13,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:13,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:14,142 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 05:14:14,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:14,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:14,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:14,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:14:14,223 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 05:14:14,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346734000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:14,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:14,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:14:14,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842901203] [2021-06-05 05:14:14,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:14,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:14,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:14,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:14,223 INFO L87 Difference]: Start difference. First operand 6742 states and 29311 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:15,439 INFO L93 Difference]: Finished difference Result 7478 states and 32071 transitions. [2021-06-05 05:14:15,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:14:15,439 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:15,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:15,456 INFO L225 Difference]: With dead ends: 7478 [2021-06-05 05:14:15,456 INFO L226 Difference]: Without dead ends: 7429 [2021-06-05 05:14:15,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 964.2ms TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:14:15,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7429 states. [2021-06-05 05:14:15,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7429 to 6727. [2021-06-05 05:14:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6727 states, 6726 states have (on average 4.349093071662207) internal successors, (29252), 6726 states have internal predecessors, (29252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:15,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 29252 transitions. [2021-06-05 05:14:15,562 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 29252 transitions. Word has length 33 [2021-06-05 05:14:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:15,562 INFO L482 AbstractCegarLoop]: Abstraction has 6727 states and 29252 transitions. [2021-06-05 05:14:15,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 29252 transitions. [2021-06-05 05:14:15,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:15,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:15,572 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, 1, 1, 1] [2021-06-05 05:14:15,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 05:14:15,777 INFO L430 AbstractCegarLoop]: === Iteration 147 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:15,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:15,777 INFO L82 PathProgramCache]: Analyzing trace with hash -364579814, now seen corresponding path program 66 times [2021-06-05 05:14:15,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:15,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213338172] [2021-06-05 05:14:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:15,939 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 05:14:15,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:15,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213338172] [2021-06-05 05:14:15,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213338172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:15,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645444288] [2021-06-05 05:14:15,940 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 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 05:14:15,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:14:15,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:15,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:14:15,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:16,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:16,264 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:14:16,264 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 29 treesize of output 57 [2021-06-05 05:14:16,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:14:16,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:16,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:16,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-06-05 05:14:16,365 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 05:14:16,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645444288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:16,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:16,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:14:16,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299313666] [2021-06-05 05:14:16,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:14:16,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:16,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:14:16,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:14:16,366 INFO L87 Difference]: Start difference. First operand 6727 states and 29252 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:17,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:17,979 INFO L93 Difference]: Finished difference Result 7339 states and 31508 transitions. [2021-06-05 05:14:17,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:14:17,980 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:17,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:17,996 INFO L225 Difference]: With dead ends: 7339 [2021-06-05 05:14:17,996 INFO L226 Difference]: Without dead ends: 7274 [2021-06-05 05:14:17,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1325.4ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:14:18,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2021-06-05 05:14:18,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 6718. [2021-06-05 05:14:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6718 states, 6717 states have (on average 4.3476254280184605) internal successors, (29203), 6717 states have internal predecessors, (29203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:18,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6718 states to 6718 states and 29203 transitions. [2021-06-05 05:14:18,105 INFO L78 Accepts]: Start accepts. Automaton has 6718 states and 29203 transitions. Word has length 33 [2021-06-05 05:14:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:18,105 INFO L482 AbstractCegarLoop]: Abstraction has 6718 states and 29203 transitions. [2021-06-05 05:14:18,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6718 states and 29203 transitions. [2021-06-05 05:14:18,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:18,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:18,116 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, 1, 1, 1] [2021-06-05 05:14:18,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 05:14:18,317 INFO L430 AbstractCegarLoop]: === Iteration 148 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:18,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1671265466, now seen corresponding path program 67 times [2021-06-05 05:14:18,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:18,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196189267] [2021-06-05 05:14:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:18,486 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 05:14:18,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:18,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196189267] [2021-06-05 05:14:18,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196189267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:18,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689304497] [2021-06-05 05:14:18,487 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 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 05:14:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:18,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:18,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:18,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:18,705 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 28 treesize of output 12 [2021-06-05 05:14:18,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:18,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:18,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:18,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:14:18,788 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 05:14:18,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689304497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:18,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:18,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:14:18,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001582471] [2021-06-05 05:14:18,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:18,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:18,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:18,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:18,789 INFO L87 Difference]: Start difference. First operand 6718 states and 29203 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:20,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:20,142 INFO L93 Difference]: Finished difference Result 8157 states and 34663 transitions. [2021-06-05 05:14:20,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:14:20,143 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:20,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:20,160 INFO L225 Difference]: With dead ends: 8157 [2021-06-05 05:14:20,161 INFO L226 Difference]: Without dead ends: 8107 [2021-06-05 05:14:20,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1076.8ms TimeCoverageRelationStatistics Valid=277, Invalid=1793, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:14:20,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8107 states. [2021-06-05 05:14:20,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8107 to 6966. [2021-06-05 05:14:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6966 states, 6965 states have (on average 4.353481694185212) internal successors, (30322), 6965 states have internal predecessors, (30322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:20,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6966 states to 6966 states and 30322 transitions. [2021-06-05 05:14:20,277 INFO L78 Accepts]: Start accepts. Automaton has 6966 states and 30322 transitions. Word has length 33 [2021-06-05 05:14:20,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:20,277 INFO L482 AbstractCegarLoop]: Abstraction has 6966 states and 30322 transitions. [2021-06-05 05:14:20,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:20,277 INFO L276 IsEmpty]: Start isEmpty. Operand 6966 states and 30322 transitions. [2021-06-05 05:14:20,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:20,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:20,288 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, 1, 1, 1] [2021-06-05 05:14:20,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:20,488 INFO L430 AbstractCegarLoop]: === Iteration 149 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:20,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:20,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1320429224, now seen corresponding path program 68 times [2021-06-05 05:14:20,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:20,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241239970] [2021-06-05 05:14:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:20,653 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 05:14:20,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:20,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241239970] [2021-06-05 05:14:20,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241239970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:20,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481236785] [2021-06-05 05:14:20,653 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 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 05:14:20,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:20,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:20,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:20,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:20,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:20,944 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:14:20,944 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 05:14:20,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:14:20,975 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-06-05 05:14:20,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:20,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 05:14:21,116 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 05:14:21,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481236785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:21,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:21,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:14:21,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405966239] [2021-06-05 05:14:21,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:14:21,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:21,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:14:21,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:14:21,117 INFO L87 Difference]: Start difference. First operand 6966 states and 30322 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:22,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:22,544 INFO L93 Difference]: Finished difference Result 8100 states and 34390 transitions. [2021-06-05 05:14:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:14:22,544 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:22,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:22,563 INFO L225 Difference]: With dead ends: 8100 [2021-06-05 05:14:22,563 INFO L226 Difference]: Without dead ends: 8078 [2021-06-05 05:14:22,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1245.8ms TimeCoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:14:22,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8078 states. [2021-06-05 05:14:22,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8078 to 6917. [2021-06-05 05:14:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6917 states, 6916 states have (on average 4.353817235396183) internal successors, (30111), 6916 states have internal predecessors, (30111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6917 states to 6917 states and 30111 transitions. [2021-06-05 05:14:22,680 INFO L78 Accepts]: Start accepts. Automaton has 6917 states and 30111 transitions. Word has length 33 [2021-06-05 05:14:22,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:22,680 INFO L482 AbstractCegarLoop]: Abstraction has 6917 states and 30111 transitions. [2021-06-05 05:14:22,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:22,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6917 states and 30111 transitions. [2021-06-05 05:14:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:22,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:22,691 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, 1, 1, 1] [2021-06-05 05:14:22,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 05:14:22,891 INFO L430 AbstractCegarLoop]: === Iteration 150 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:22,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2075176000, now seen corresponding path program 69 times [2021-06-05 05:14:22,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:22,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335972470] [2021-06-05 05:14:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:23,112 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 05:14:23,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:23,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335972470] [2021-06-05 05:14:23,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335972470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:23,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444469824] [2021-06-05 05:14:23,113 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 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 05:14:23,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:14:23,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:23,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:23,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:23,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:23,356 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:14:23,356 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 27 treesize of output 55 [2021-06-05 05:14:23,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:14:23,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:23,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:23,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 05:14:23,538 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 05:14:23,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444469824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:23,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:23,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:14:23,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334177074] [2021-06-05 05:14:23,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:14:23,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:23,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:14:23,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:14:23,539 INFO L87 Difference]: Start difference. First operand 6917 states and 30111 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:24,431 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-05 05:14:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:27,360 INFO L93 Difference]: Finished difference Result 7942 states and 34054 transitions. [2021-06-05 05:14:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:14:27,361 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:27,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:27,379 INFO L225 Difference]: With dead ends: 7942 [2021-06-05 05:14:27,379 INFO L226 Difference]: Without dead ends: 7927 [2021-06-05 05:14:27,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 3052.9ms TimeCoverageRelationStatistics Valid=491, Invalid=4201, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:14:27,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-06-05 05:14:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 6917. [2021-06-05 05:14:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6917 states, 6916 states have (on average 4.353383458646617) internal successors, (30108), 6916 states have internal predecessors, (30108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:27,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6917 states to 6917 states and 30108 transitions. [2021-06-05 05:14:27,492 INFO L78 Accepts]: Start accepts. Automaton has 6917 states and 30108 transitions. Word has length 33 [2021-06-05 05:14:27,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:27,492 INFO L482 AbstractCegarLoop]: Abstraction has 6917 states and 30108 transitions. [2021-06-05 05:14:27,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:27,492 INFO L276 IsEmpty]: Start isEmpty. Operand 6917 states and 30108 transitions. [2021-06-05 05:14:27,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:27,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:27,504 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, 1, 1, 1] [2021-06-05 05:14:27,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:27,704 INFO L430 AbstractCegarLoop]: === Iteration 151 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:27,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:27,704 INFO L82 PathProgramCache]: Analyzing trace with hash 294577698, now seen corresponding path program 70 times [2021-06-05 05:14:27,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:27,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445995314] [2021-06-05 05:14:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:27,936 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 05:14:27,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:27,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445995314] [2021-06-05 05:14:27,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445995314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:27,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605434444] [2021-06-05 05:14:27,937 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 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 05:14:27,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:27,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:27,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:27,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:28,125 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 28 treesize of output 12 [2021-06-05 05:14:28,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:28,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:28,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:28,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:14:28,215 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 05:14:28,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605434444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:28,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:28,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:14:28,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209646135] [2021-06-05 05:14:28,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:28,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:28,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:28,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:28,216 INFO L87 Difference]: Start difference. First operand 6917 states and 30108 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:30,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:30,479 INFO L93 Difference]: Finished difference Result 8117 states and 34723 transitions. [2021-06-05 05:14:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:14:30,480 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:30,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:30,497 INFO L225 Difference]: With dead ends: 8117 [2021-06-05 05:14:30,497 INFO L226 Difference]: Without dead ends: 8082 [2021-06-05 05:14:30,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1767.3ms TimeCoverageRelationStatistics Valid=384, Invalid=2586, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:14:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8082 states. [2021-06-05 05:14:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8082 to 6853. [2021-06-05 05:14:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 6852 states have (on average 4.355662580268535) internal successors, (29845), 6852 states have internal predecessors, (29845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 29845 transitions. [2021-06-05 05:14:30,610 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 29845 transitions. Word has length 33 [2021-06-05 05:14:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:30,610 INFO L482 AbstractCegarLoop]: Abstraction has 6853 states and 29845 transitions. [2021-06-05 05:14:30,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 29845 transitions. [2021-06-05 05:14:30,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:30,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:30,620 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, 1, 1, 1] [2021-06-05 05:14:30,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:30,821 INFO L430 AbstractCegarLoop]: === Iteration 152 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:30,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2104469510, now seen corresponding path program 71 times [2021-06-05 05:14:30,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:30,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427486889] [2021-06-05 05:14:30,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:30,985 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 05:14:30,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:30,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427486889] [2021-06-05 05:14:30,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427486889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:30,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370659775] [2021-06-05 05:14:30,986 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 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 05:14:31,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:14:31,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:31,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:31,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:31,176 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 05:14:31,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:31,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:31,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:31,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:14:31,258 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 05:14:31,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370659775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:31,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:31,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:14:31,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372583391] [2021-06-05 05:14:31,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:31,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:31,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:31,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:31,259 INFO L87 Difference]: Start difference. First operand 6853 states and 29845 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:32,608 INFO L93 Difference]: Finished difference Result 7506 states and 32235 transitions. [2021-06-05 05:14:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:14:32,608 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:32,625 INFO L225 Difference]: With dead ends: 7506 [2021-06-05 05:14:32,625 INFO L226 Difference]: Without dead ends: 7457 [2021-06-05 05:14:32,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1086.4ms TimeCoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:14:32,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7457 states. [2021-06-05 05:14:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7457 to 6808. [2021-06-05 05:14:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6808 states, 6807 states have (on average 4.354047304245629) internal successors, (29638), 6807 states have internal predecessors, (29638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:32,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6808 states to 6808 states and 29638 transitions. [2021-06-05 05:14:32,733 INFO L78 Accepts]: Start accepts. Automaton has 6808 states and 29638 transitions. Word has length 33 [2021-06-05 05:14:32,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:32,733 INFO L482 AbstractCegarLoop]: Abstraction has 6808 states and 29638 transitions. [2021-06-05 05:14:32,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 6808 states and 29638 transitions. [2021-06-05 05:14:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:32,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:32,744 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, 1, 1, 1] [2021-06-05 05:14:32,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-06-05 05:14:32,944 INFO L430 AbstractCegarLoop]: === Iteration 153 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:32,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1946581216, now seen corresponding path program 72 times [2021-06-05 05:14:32,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:32,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128404582] [2021-06-05 05:14:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:33,111 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 05:14:33,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:33,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128404582] [2021-06-05 05:14:33,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128404582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:33,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286316212] [2021-06-05 05:14:33,112 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 05:14:33,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:14:33,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:33,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:14:33,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:33,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:33,441 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:14:33,441 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 29 treesize of output 57 [2021-06-05 05:14:33,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:14:33,475 INFO L628 ElimStorePlain]: treesize reduction 83, result has 21.0 percent of original size [2021-06-05 05:14:33,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:33,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:22 [2021-06-05 05:14:33,576 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 05:14:33,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286316212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:33,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:33,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:14:33,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918602491] [2021-06-05 05:14:33,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:14:33,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:33,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:14:33,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:14:33,577 INFO L87 Difference]: Start difference. First operand 6808 states and 29638 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:35,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:35,128 INFO L93 Difference]: Finished difference Result 7476 states and 31984 transitions. [2021-06-05 05:14:35,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:14:35,128 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:35,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:35,145 INFO L225 Difference]: With dead ends: 7476 [2021-06-05 05:14:35,145 INFO L226 Difference]: Without dead ends: 7411 [2021-06-05 05:14:35,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1342.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:14:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2021-06-05 05:14:35,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 6766. [2021-06-05 05:14:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6766 states, 6765 states have (on average 4.349445676274945) internal successors, (29424), 6765 states have internal predecessors, (29424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6766 states to 6766 states and 29424 transitions. [2021-06-05 05:14:35,254 INFO L78 Accepts]: Start accepts. Automaton has 6766 states and 29424 transitions. Word has length 33 [2021-06-05 05:14:35,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:35,254 INFO L482 AbstractCegarLoop]: Abstraction has 6766 states and 29424 transitions. [2021-06-05 05:14:35,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:35,254 INFO L276 IsEmpty]: Start isEmpty. Operand 6766 states and 29424 transitions. [2021-06-05 05:14:35,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:35,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:35,265 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, 1, 1, 1] [2021-06-05 05:14:35,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:35,465 INFO L430 AbstractCegarLoop]: === Iteration 154 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:35,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:35,466 INFO L82 PathProgramCache]: Analyzing trace with hash -193710086, now seen corresponding path program 73 times [2021-06-05 05:14:35,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:35,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008924652] [2021-06-05 05:14:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:35,694 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 05:14:35,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:35,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008924652] [2021-06-05 05:14:35,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008924652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:35,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578436955] [2021-06-05 05:14:35,695 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 05:14:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:35,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:35,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:35,956 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 05:14:35,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:35,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:35,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:35,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:14:36,019 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 05:14:36,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578436955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:36,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:36,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:14:36,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291549480] [2021-06-05 05:14:36,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:36,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:36,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:36,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:36,020 INFO L87 Difference]: Start difference. First operand 6766 states and 29424 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:37,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:37,154 INFO L93 Difference]: Finished difference Result 7141 states and 30729 transitions. [2021-06-05 05:14:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:14:37,155 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:37,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:37,171 INFO L225 Difference]: With dead ends: 7141 [2021-06-05 05:14:37,171 INFO L226 Difference]: Without dead ends: 7080 [2021-06-05 05:14:37,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 925.0ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:14:37,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7080 states. [2021-06-05 05:14:37,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7080 to 6772. [2021-06-05 05:14:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6772 states, 6771 states have (on average 4.347954511888938) internal successors, (29440), 6771 states have internal predecessors, (29440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 29440 transitions. [2021-06-05 05:14:37,277 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 29440 transitions. Word has length 33 [2021-06-05 05:14:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:37,277 INFO L482 AbstractCegarLoop]: Abstraction has 6772 states and 29440 transitions. [2021-06-05 05:14:37,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 29440 transitions. [2021-06-05 05:14:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:37,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:37,288 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, 1, 1, 1] [2021-06-05 05:14:37,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:37,488 INFO L430 AbstractCegarLoop]: === Iteration 155 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:37,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:37,489 INFO L82 PathProgramCache]: Analyzing trace with hash -644955254, now seen corresponding path program 74 times [2021-06-05 05:14:37,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:37,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487787999] [2021-06-05 05:14:37,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:37,659 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 05:14:37,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:37,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487787999] [2021-06-05 05:14:37,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487787999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:37,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287021661] [2021-06-05 05:14:37,659 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 05:14:37,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:37,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:37,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:37,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:37,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:37,985 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:14:37,986 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 33 treesize of output 61 [2021-06-05 05:14:37,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:14:38,010 INFO L628 ElimStorePlain]: treesize reduction 52, result has 29.7 percent of original size [2021-06-05 05:14:38,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:38,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-06-05 05:14:38,105 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 05:14:38,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287021661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:38,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:38,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:14:38,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359368852] [2021-06-05 05:14:38,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:14:38,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:38,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:14:38,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:14:38,105 INFO L87 Difference]: Start difference. First operand 6772 states and 29440 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:39,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:39,624 INFO L93 Difference]: Finished difference Result 7379 states and 31545 transitions. [2021-06-05 05:14:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:14:39,625 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:39,641 INFO L225 Difference]: With dead ends: 7379 [2021-06-05 05:14:39,641 INFO L226 Difference]: Without dead ends: 7314 [2021-06-05 05:14:39,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1185.1ms TimeCoverageRelationStatistics Valid=168, Invalid=1902, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:14:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7314 states. [2021-06-05 05:14:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7314 to 6745. [2021-06-05 05:14:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6745 states, 6744 states have (on average 4.347419928825623) internal successors, (29319), 6744 states have internal predecessors, (29319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6745 states to 6745 states and 29319 transitions. [2021-06-05 05:14:39,747 INFO L78 Accepts]: Start accepts. Automaton has 6745 states and 29319 transitions. Word has length 33 [2021-06-05 05:14:39,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:39,747 INFO L482 AbstractCegarLoop]: Abstraction has 6745 states and 29319 transitions. [2021-06-05 05:14:39,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 6745 states and 29319 transitions. [2021-06-05 05:14:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:39,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:39,758 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, 1, 1, 1] [2021-06-05 05:14:39,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:39,958 INFO L430 AbstractCegarLoop]: === Iteration 156 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:39,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1096875184, now seen corresponding path program 75 times [2021-06-05 05:14:39,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:39,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895135724] [2021-06-05 05:14:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:40,124 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 05:14:40,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:40,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895135724] [2021-06-05 05:14:40,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895135724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:40,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583789394] [2021-06-05 05:14:40,125 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 05:14:40,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:14:40,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:40,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:40,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:40,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:40,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:14:40,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:40,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:40,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:40,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 05:14:40,533 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 05:14:40,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583789394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:40,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:40,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:14:40,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894165225] [2021-06-05 05:14:40,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:14:40,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:40,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:14:40,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:14:40,534 INFO L87 Difference]: Start difference. First operand 6745 states and 29319 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:41,346 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-06-05 05:14:42,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:42,757 INFO L93 Difference]: Finished difference Result 8079 states and 34659 transitions. [2021-06-05 05:14:42,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:14:42,758 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:42,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:42,776 INFO L225 Difference]: With dead ends: 8079 [2021-06-05 05:14:42,776 INFO L226 Difference]: Without dead ends: 8060 [2021-06-05 05:14:42,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1991.3ms TimeCoverageRelationStatistics Valid=357, Invalid=1995, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:14:42,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8060 states. [2021-06-05 05:14:42,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8060 to 6853. [2021-06-05 05:14:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 6852 states have (on average 4.350992410974897) internal successors, (29813), 6852 states have internal predecessors, (29813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 29813 transitions. [2021-06-05 05:14:42,930 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 29813 transitions. Word has length 33 [2021-06-05 05:14:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:42,930 INFO L482 AbstractCegarLoop]: Abstraction has 6853 states and 29813 transitions. [2021-06-05 05:14:42,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 29813 transitions. [2021-06-05 05:14:42,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:42,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:42,941 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, 1, 1, 1] [2021-06-05 05:14:43,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:43,141 INFO L430 AbstractCegarLoop]: === Iteration 157 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:43,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:43,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1894819506, now seen corresponding path program 76 times [2021-06-05 05:14:43,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:43,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529402752] [2021-06-05 05:14:43,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:43,289 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 05:14:43,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:43,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529402752] [2021-06-05 05:14:43,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529402752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:43,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3928642] [2021-06-05 05:14:43,289 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 05:14:43,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:43,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:43,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:43,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:43,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:43,471 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 28 treesize of output 12 [2021-06-05 05:14:43,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:43,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:43,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:43,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:14:43,551 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 05:14:43,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3928642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:43,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:43,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:14:43,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590954340] [2021-06-05 05:14:43,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:43,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:43,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:43,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:43,552 INFO L87 Difference]: Start difference. First operand 6853 states and 29813 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:44,687 INFO L93 Difference]: Finished difference Result 8584 states and 36474 transitions. [2021-06-05 05:14:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:14:44,688 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:44,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:44,706 INFO L225 Difference]: With dead ends: 8584 [2021-06-05 05:14:44,707 INFO L226 Difference]: Without dead ends: 8556 [2021-06-05 05:14:44,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 792.5ms TimeCoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:14:44,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2021-06-05 05:14:44,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 6958. [2021-06-05 05:14:44,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6958 states, 6957 states have (on average 4.358919074313641) internal successors, (30325), 6957 states have internal predecessors, (30325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:44,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 30325 transitions. [2021-06-05 05:14:44,833 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 30325 transitions. Word has length 33 [2021-06-05 05:14:44,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:44,833 INFO L482 AbstractCegarLoop]: Abstraction has 6958 states and 30325 transitions. [2021-06-05 05:14:44,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:44,833 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 30325 transitions. [2021-06-05 05:14:44,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:44,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:44,844 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, 1, 1, 1] [2021-06-05 05:14:45,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 05:14:45,044 INFO L430 AbstractCegarLoop]: === Iteration 158 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:45,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1948206026, now seen corresponding path program 77 times [2021-06-05 05:14:45,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:45,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936046854] [2021-06-05 05:14:45,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:45,212 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 05:14:45,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:45,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936046854] [2021-06-05 05:14:45,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936046854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:45,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677188632] [2021-06-05 05:14:45,212 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 05:14:45,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:14:45,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:45,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:45,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:45,388 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 05:14:45,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:45,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:45,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:45,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:14:45,462 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 05:14:45,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677188632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:45,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:45,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:14:45,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657952389] [2021-06-05 05:14:45,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:14:45,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:45,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:14:45,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:14:45,463 INFO L87 Difference]: Start difference. First operand 6958 states and 30325 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:14:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:46,526 INFO L93 Difference]: Finished difference Result 8561 states and 36382 transitions. [2021-06-05 05:14:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:14:46,527 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 05:14:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:46,546 INFO L225 Difference]: With dead ends: 8561 [2021-06-05 05:14:46,546 INFO L226 Difference]: Without dead ends: 8528 [2021-06-05 05:14:46,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 760.8ms TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:14:46,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8528 states. [2021-06-05 05:14:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8528 to 6933. [2021-06-05 05:14:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6933 states, 6932 states have (on average 4.360357761107905) internal successors, (30226), 6932 states have internal predecessors, (30226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:46,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6933 states to 6933 states and 30226 transitions. [2021-06-05 05:14:46,674 INFO L78 Accepts]: Start accepts. Automaton has 6933 states and 30226 transitions. Word has length 33 [2021-06-05 05:14:46,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:46,675 INFO L482 AbstractCegarLoop]: Abstraction has 6933 states and 30226 transitions. [2021-06-05 05:14:46,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:14:46,675 INFO L276 IsEmpty]: Start isEmpty. Operand 6933 states and 30226 transitions. [2021-06-05 05:14:46,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:46,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:46,686 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, 1, 1, 1] [2021-06-05 05:14:46,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:46,886 INFO L430 AbstractCegarLoop]: === Iteration 159 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:46,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:46,886 INFO L82 PathProgramCache]: Analyzing trace with hash 114623070, now seen corresponding path program 78 times [2021-06-05 05:14:46,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:46,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180450808] [2021-06-05 05:14:46,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:47,124 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 05:14:47,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:47,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180450808] [2021-06-05 05:14:47,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180450808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:47,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607882775] [2021-06-05 05:14:47,124 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 05:14:47,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:14:47,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:47,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:14:47,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:47,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:47,326 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 05:14:47,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:47,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:47,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:47,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:14:47,474 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 05:14:47,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607882775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:47,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:47,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:14:47,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623462915] [2021-06-05 05:14:47,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:14:47,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:47,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:14:47,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:14:47,475 INFO L87 Difference]: Start difference. First operand 6933 states and 30226 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:49,117 INFO L93 Difference]: Finished difference Result 7914 states and 34231 transitions. [2021-06-05 05:14:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:14:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:49,135 INFO L225 Difference]: With dead ends: 7914 [2021-06-05 05:14:49,135 INFO L226 Difference]: Without dead ends: 7899 [2021-06-05 05:14:49,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1160.0ms TimeCoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:14:49,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7899 states. [2021-06-05 05:14:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7899 to 6921. [2021-06-05 05:14:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6921 states, 6920 states have (on average 4.361705202312138) internal successors, (30183), 6920 states have internal predecessors, (30183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6921 states to 6921 states and 30183 transitions. [2021-06-05 05:14:49,247 INFO L78 Accepts]: Start accepts. Automaton has 6921 states and 30183 transitions. Word has length 33 [2021-06-05 05:14:49,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:49,247 INFO L482 AbstractCegarLoop]: Abstraction has 6921 states and 30183 transitions. [2021-06-05 05:14:49,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:49,248 INFO L276 IsEmpty]: Start isEmpty. Operand 6921 states and 30183 transitions. [2021-06-05 05:14:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:49,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:49,258 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, 1, 1, 1] [2021-06-05 05:14:49,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:49,459 INFO L430 AbstractCegarLoop]: === Iteration 160 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:49,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:49,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2104888460, now seen corresponding path program 79 times [2021-06-05 05:14:49,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:49,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043506297] [2021-06-05 05:14:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:49,625 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 05:14:49,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:49,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043506297] [2021-06-05 05:14:49,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043506297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:49,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562570478] [2021-06-05 05:14:49,625 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 05:14:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:49,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:49,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:49,847 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 05:14:49,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:49,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:49,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:49,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:14:49,909 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 05:14:49,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562570478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:49,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:49,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:14:49,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614135475] [2021-06-05 05:14:49,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:49,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:49,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:49,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:49,910 INFO L87 Difference]: Start difference. First operand 6921 states and 30183 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:51,195 INFO L93 Difference]: Finished difference Result 7735 states and 33462 transitions. [2021-06-05 05:14:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:14:51,196 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:51,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:51,214 INFO L225 Difference]: With dead ends: 7735 [2021-06-05 05:14:51,214 INFO L226 Difference]: Without dead ends: 7720 [2021-06-05 05:14:51,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 831.2ms TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:14:51,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7720 states. [2021-06-05 05:14:51,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7720 to 6921. [2021-06-05 05:14:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6921 states, 6920 states have (on average 4.3621387283237) internal successors, (30186), 6920 states have internal predecessors, (30186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6921 states to 6921 states and 30186 transitions. [2021-06-05 05:14:51,375 INFO L78 Accepts]: Start accepts. Automaton has 6921 states and 30186 transitions. Word has length 33 [2021-06-05 05:14:51,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:51,375 INFO L482 AbstractCegarLoop]: Abstraction has 6921 states and 30186 transitions. [2021-06-05 05:14:51,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:51,375 INFO L276 IsEmpty]: Start isEmpty. Operand 6921 states and 30186 transitions. [2021-06-05 05:14:51,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:51,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:51,386 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, 1, 1, 1] [2021-06-05 05:14:51,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:51,586 INFO L430 AbstractCegarLoop]: === Iteration 161 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:51,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:51,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1248804492, now seen corresponding path program 80 times [2021-06-05 05:14:51,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:51,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348016868] [2021-06-05 05:14:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:51,770 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 05:14:51,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:51,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348016868] [2021-06-05 05:14:51,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348016868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:51,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69966175] [2021-06-05 05:14:51,771 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 05:14:51,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:51,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:51,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:51,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:51,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:51,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:51,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:51,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:51,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:51,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:14:52,171 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 05:14:52,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69966175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:52,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:52,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:14:52,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792729273] [2021-06-05 05:14:52,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:14:52,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:52,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:14:52,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:14:52,172 INFO L87 Difference]: Start difference. First operand 6921 states and 30186 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:53,069 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-06-05 05:14:54,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:54,651 INFO L93 Difference]: Finished difference Result 7947 states and 34282 transitions. [2021-06-05 05:14:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:14:54,651 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:54,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:54,669 INFO L225 Difference]: With dead ends: 7947 [2021-06-05 05:14:54,669 INFO L226 Difference]: Without dead ends: 7928 [2021-06-05 05:14:54,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 2232.2ms TimeCoverageRelationStatistics Valid=425, Invalid=2227, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:14:54,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7928 states. [2021-06-05 05:14:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7928 to 7007. [2021-06-05 05:14:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7007 states, 7006 states have (on average 4.363260062803311) internal successors, (30569), 7006 states have internal predecessors, (30569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 30569 transitions. [2021-06-05 05:14:54,790 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 30569 transitions. Word has length 33 [2021-06-05 05:14:54,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:54,790 INFO L482 AbstractCegarLoop]: Abstraction has 7007 states and 30569 transitions. [2021-06-05 05:14:54,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:54,790 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 30569 transitions. [2021-06-05 05:14:54,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:54,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:54,801 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, 1, 1, 1] [2021-06-05 05:14:55,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 05:14:55,002 INFO L430 AbstractCegarLoop]: === Iteration 162 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:55,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:55,002 INFO L82 PathProgramCache]: Analyzing trace with hash 54468114, now seen corresponding path program 81 times [2021-06-05 05:14:55,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:55,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493943947] [2021-06-05 05:14:55,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:55,168 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 05:14:55,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:55,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493943947] [2021-06-05 05:14:55,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493943947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:55,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715278633] [2021-06-05 05:14:55,168 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 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 05:14:55,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:14:55,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:55,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:55,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:55,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:55,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:14:55,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:55,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:55,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:55,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:14:55,543 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 05:14:55,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715278633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:55,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:55,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:14:55,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448346150] [2021-06-05 05:14:55,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:14:55,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:55,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:14:55,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:14:55,544 INFO L87 Difference]: Start difference. First operand 7007 states and 30569 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:57,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:57,473 INFO L93 Difference]: Finished difference Result 7712 states and 33332 transitions. [2021-06-05 05:14:57,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:14:57,473 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:57,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:57,490 INFO L225 Difference]: With dead ends: 7712 [2021-06-05 05:14:57,491 INFO L226 Difference]: Without dead ends: 7699 [2021-06-05 05:14:57,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1721.2ms TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:14:57,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7699 states. [2021-06-05 05:14:57,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7699 to 6991. [2021-06-05 05:14:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 6990 states have (on average 4.365951359084407) internal successors, (30518), 6990 states have internal predecessors, (30518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 30518 transitions. [2021-06-05 05:14:57,606 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 30518 transitions. Word has length 33 [2021-06-05 05:14:57,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:57,606 INFO L482 AbstractCegarLoop]: Abstraction has 6991 states and 30518 transitions. [2021-06-05 05:14:57,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:57,606 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 30518 transitions. [2021-06-05 05:14:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:57,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:57,617 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, 1, 1, 1] [2021-06-05 05:14:57,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 05:14:57,817 INFO L430 AbstractCegarLoop]: === Iteration 163 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:57,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:57,817 INFO L82 PathProgramCache]: Analyzing trace with hash -844893958, now seen corresponding path program 82 times [2021-06-05 05:14:57,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:57,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719826244] [2021-06-05 05:14:57,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:57,983 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 05:14:57,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:57,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719826244] [2021-06-05 05:14:57,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719826244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:57,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694419406] [2021-06-05 05:14:57,983 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 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 05:14:58,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:58,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:58,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:14:58,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:58,134 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 05:14:58,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:58,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:58,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:58,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 05:14:58,233 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 05:14:58,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694419406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:58,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:58,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:14:58,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582078989] [2021-06-05 05:14:58,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:58,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:58,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:58,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:58,234 INFO L87 Difference]: Start difference. First operand 6991 states and 30518 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:59,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:59,719 INFO L93 Difference]: Finished difference Result 8547 states and 36564 transitions. [2021-06-05 05:14:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:14:59,720 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:14:59,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:59,738 INFO L225 Difference]: With dead ends: 8547 [2021-06-05 05:14:59,738 INFO L226 Difference]: Without dead ends: 8517 [2021-06-05 05:14:59,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1173.3ms TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:14:59,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8517 states. [2021-06-05 05:14:59,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8517 to 7100. [2021-06-05 05:14:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7100 states, 7099 states have (on average 4.368643470911396) internal successors, (31013), 7099 states have internal predecessors, (31013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7100 states to 7100 states and 31013 transitions. [2021-06-05 05:14:59,926 INFO L78 Accepts]: Start accepts. Automaton has 7100 states and 31013 transitions. Word has length 33 [2021-06-05 05:14:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:59,926 INFO L482 AbstractCegarLoop]: Abstraction has 7100 states and 31013 transitions. [2021-06-05 05:14:59,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 7100 states and 31013 transitions. [2021-06-05 05:14:59,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:14:59,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:59,937 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, 1, 1, 1] [2021-06-05 05:15:00,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 05:15:00,138 INFO L430 AbstractCegarLoop]: === Iteration 164 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:00,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:00,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1081594, now seen corresponding path program 83 times [2021-06-05 05:15:00,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:00,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619423578] [2021-06-05 05:15:00,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:00,298 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 05:15:00,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:00,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619423578] [2021-06-05 05:15:00,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619423578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:00,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632859204] [2021-06-05 05:15:00,298 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 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 05:15:00,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:15:00,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:00,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:00,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:00,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:00,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 05:15:00,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:00,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:00,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:00,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:15:00,544 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 05:15:00,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632859204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:00,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:00,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:15:00,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766881782] [2021-06-05 05:15:00,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:00,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:00,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:00,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:00,545 INFO L87 Difference]: Start difference. First operand 7100 states and 31013 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:15:01,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:01,602 INFO L93 Difference]: Finished difference Result 8299 states and 35564 transitions. [2021-06-05 05:15:01,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:15:01,603 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 05:15:01,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:01,621 INFO L225 Difference]: With dead ends: 8299 [2021-06-05 05:15:01,621 INFO L226 Difference]: Without dead ends: 8262 [2021-06-05 05:15:01,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 848.5ms TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:15:01,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8262 states. [2021-06-05 05:15:01,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8262 to 7060. [2021-06-05 05:15:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7060 states, 7059 states have (on average 4.370307408981442) internal successors, (30850), 7059 states have internal predecessors, (30850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 30850 transitions. [2021-06-05 05:15:01,745 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 30850 transitions. Word has length 33 [2021-06-05 05:15:01,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:01,745 INFO L482 AbstractCegarLoop]: Abstraction has 7060 states and 30850 transitions. [2021-06-05 05:15:01,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:15:01,746 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 30850 transitions. [2021-06-05 05:15:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:01,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:01,756 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, 1, 1, 1] [2021-06-05 05:15:01,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:01,961 INFO L430 AbstractCegarLoop]: === Iteration 165 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:01,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:01,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2063910690, now seen corresponding path program 84 times [2021-06-05 05:15:01,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:01,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268404063] [2021-06-05 05:15:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:02,130 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 05:15:02,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:02,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268404063] [2021-06-05 05:15:02,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268404063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:02,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539252414] [2021-06-05 05:15:02,130 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 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 05:15:02,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:15:02,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:02,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:15:02,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:02,302 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 21 treesize of output 13 [2021-06-05 05:15:02,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:02,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:02,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:02,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-06-05 05:15:02,481 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 05:15:02,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539252414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:02,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:02,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:15:02,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823179255] [2021-06-05 05:15:02,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:15:02,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:02,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:15:02,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:15:02,482 INFO L87 Difference]: Start difference. First operand 7060 states and 30850 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:04,282 INFO L93 Difference]: Finished difference Result 8289 states and 35705 transitions. [2021-06-05 05:15:04,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:15:04,282 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:15:04,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:04,347 INFO L225 Difference]: With dead ends: 8289 [2021-06-05 05:15:04,347 INFO L226 Difference]: Without dead ends: 8245 [2021-06-05 05:15:04,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1273.5ms TimeCoverageRelationStatistics Valid=350, Invalid=2512, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:15:04,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8245 states. [2021-06-05 05:15:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8245 to 7090. [2021-06-05 05:15:04,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7090 states, 7089 states have (on average 4.370856256171534) internal successors, (30985), 7089 states have internal predecessors, (30985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:04,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7090 states to 7090 states and 30985 transitions. [2021-06-05 05:15:04,467 INFO L78 Accepts]: Start accepts. Automaton has 7090 states and 30985 transitions. Word has length 33 [2021-06-05 05:15:04,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:04,467 INFO L482 AbstractCegarLoop]: Abstraction has 7090 states and 30985 transitions. [2021-06-05 05:15:04,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:04,467 INFO L276 IsEmpty]: Start isEmpty. Operand 7090 states and 30985 transitions. [2021-06-05 05:15:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:04,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:04,478 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, 1, 1, 1] [2021-06-05 05:15:04,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 05:15:04,681 INFO L430 AbstractCegarLoop]: === Iteration 166 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:04,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:04,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1015138288, now seen corresponding path program 85 times [2021-06-05 05:15:04,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:04,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950581675] [2021-06-05 05:15:04,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:04,863 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 05:15:04,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:04,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950581675] [2021-06-05 05:15:04,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950581675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:04,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066509260] [2021-06-05 05:15:04,864 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 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 05:15:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:04,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:04,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:05,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:05,031 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 29 treesize of output 13 [2021-06-05 05:15:05,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:05,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:05,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:05,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:15:05,130 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 05:15:05,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066509260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:05,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:05,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:15:05,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797482824] [2021-06-05 05:15:05,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:05,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:05,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:05,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:05,131 INFO L87 Difference]: Start difference. First operand 7090 states and 30985 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:06,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:06,730 INFO L93 Difference]: Finished difference Result 8643 states and 37010 transitions. [2021-06-05 05:15:06,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:15:06,730 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:15:06,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:06,750 INFO L225 Difference]: With dead ends: 8643 [2021-06-05 05:15:06,750 INFO L226 Difference]: Without dead ends: 8605 [2021-06-05 05:15:06,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1369.5ms TimeCoverageRelationStatistics Valid=490, Invalid=2480, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:15:06,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8605 states. [2021-06-05 05:15:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8605 to 7267. [2021-06-05 05:15:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7267 states, 7266 states have (on average 4.376548307184145) internal successors, (31800), 7266 states have internal predecessors, (31800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7267 states to 7267 states and 31800 transitions. [2021-06-05 05:15:06,883 INFO L78 Accepts]: Start accepts. Automaton has 7267 states and 31800 transitions. Word has length 33 [2021-06-05 05:15:06,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:06,883 INFO L482 AbstractCegarLoop]: Abstraction has 7267 states and 31800 transitions. [2021-06-05 05:15:06,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 7267 states and 31800 transitions. [2021-06-05 05:15:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:06,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:06,896 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, 1, 1, 1] [2021-06-05 05:15:07,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 05:15:07,096 INFO L430 AbstractCegarLoop]: === Iteration 167 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:07,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:07,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1976556402, now seen corresponding path program 86 times [2021-06-05 05:15:07,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:07,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081956212] [2021-06-05 05:15:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:07,327 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 05:15:07,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:07,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081956212] [2021-06-05 05:15:07,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081956212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:07,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371173745] [2021-06-05 05:15:07,327 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 05:15:07,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:07,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:07,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:07,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:07,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:07,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:07,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:07,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:07,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:07,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:15:07,738 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 05:15:07,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371173745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:07,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:07,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:15:07,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406587630] [2021-06-05 05:15:07,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:15:07,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:07,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:15:07,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:15:07,739 INFO L87 Difference]: Start difference. First operand 7267 states and 31800 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:09,470 INFO L93 Difference]: Finished difference Result 8050 states and 34800 transitions. [2021-06-05 05:15:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:15:09,471 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:15:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:09,489 INFO L225 Difference]: With dead ends: 8050 [2021-06-05 05:15:09,489 INFO L226 Difference]: Without dead ends: 8037 [2021-06-05 05:15:09,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1651.5ms TimeCoverageRelationStatistics Valid=376, Invalid=1880, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:15:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8037 states. [2021-06-05 05:15:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8037 to 7267. [2021-06-05 05:15:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7267 states, 7266 states have (on average 4.376135425268373) internal successors, (31797), 7266 states have internal predecessors, (31797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7267 states to 7267 states and 31797 transitions. [2021-06-05 05:15:09,611 INFO L78 Accepts]: Start accepts. Automaton has 7267 states and 31797 transitions. Word has length 33 [2021-06-05 05:15:09,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:09,611 INFO L482 AbstractCegarLoop]: Abstraction has 7267 states and 31797 transitions. [2021-06-05 05:15:09,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:09,611 INFO L276 IsEmpty]: Start isEmpty. Operand 7267 states and 31797 transitions. [2021-06-05 05:15:09,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:09,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:09,623 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, 1, 1, 1] [2021-06-05 05:15:09,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:09,824 INFO L430 AbstractCegarLoop]: === Iteration 168 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:09,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1419048822, now seen corresponding path program 87 times [2021-06-05 05:15:09,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:09,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439819159] [2021-06-05 05:15:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:10,005 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 05:15:10,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:10,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439819159] [2021-06-05 05:15:10,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439819159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:10,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804676956] [2021-06-05 05:15:10,006 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 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 05:15:10,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:15:10,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:10,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:15:10,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:10,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:10,208 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:15:10,209 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 29 treesize of output 57 [2021-06-05 05:15:10,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:10,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:10,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:10,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 05:15:10,406 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 05:15:10,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804676956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:10,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:10,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:15:10,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687596710] [2021-06-05 05:15:10,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:15:10,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:10,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:15:10,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:15:10,407 INFO L87 Difference]: Start difference. First operand 7267 states and 31797 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:12,099 INFO L93 Difference]: Finished difference Result 8408 states and 36272 transitions. [2021-06-05 05:15:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:15:12,099 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:15:12,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:12,118 INFO L225 Difference]: With dead ends: 8408 [2021-06-05 05:15:12,118 INFO L226 Difference]: Without dead ends: 8372 [2021-06-05 05:15:12,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1319.5ms TimeCoverageRelationStatistics Valid=328, Invalid=2428, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:15:12,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8372 states. [2021-06-05 05:15:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8372 to 7412. [2021-06-05 05:15:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 4.383618944811766) internal successors, (32487), 7411 states have internal predecessors, (32487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 32487 transitions. [2021-06-05 05:15:12,242 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 32487 transitions. Word has length 33 [2021-06-05 05:15:12,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:12,242 INFO L482 AbstractCegarLoop]: Abstraction has 7412 states and 32487 transitions. [2021-06-05 05:15:12,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:12,242 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 32487 transitions. [2021-06-05 05:15:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:12,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:12,255 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, 1, 1, 1] [2021-06-05 05:15:12,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:12,455 INFO L430 AbstractCegarLoop]: === Iteration 169 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:12,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:12,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1534370608, now seen corresponding path program 88 times [2021-06-05 05:15:12,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:12,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130886944] [2021-06-05 05:15:12,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:12,643 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 05:15:12,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:12,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130886944] [2021-06-05 05:15:12,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130886944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:12,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404462845] [2021-06-05 05:15:12,643 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 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 05:15:12,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:12,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:12,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:12,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:12,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:12,835 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 29 treesize of output 13 [2021-06-05 05:15:12,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:12,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:12,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:12,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:15:12,931 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 05:15:12,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404462845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:12,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:12,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:15:12,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144110997] [2021-06-05 05:15:12,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:12,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:12,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:12,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:12,932 INFO L87 Difference]: Start difference. First operand 7412 states and 32487 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:14,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:14,607 INFO L93 Difference]: Finished difference Result 8537 states and 36866 transitions. [2021-06-05 05:15:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:15:14,608 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:15:14,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:14,627 INFO L225 Difference]: With dead ends: 8537 [2021-06-05 05:15:14,628 INFO L226 Difference]: Without dead ends: 8499 [2021-06-05 05:15:14,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1335.7ms TimeCoverageRelationStatistics Valid=305, Invalid=2047, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:15:14,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8499 states. [2021-06-05 05:15:14,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8499 to 7415. [2021-06-05 05:15:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7415 states, 7414 states have (on average 4.383193957377934) internal successors, (32497), 7414 states have internal predecessors, (32497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:14,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7415 states to 7415 states and 32497 transitions. [2021-06-05 05:15:14,763 INFO L78 Accepts]: Start accepts. Automaton has 7415 states and 32497 transitions. Word has length 33 [2021-06-05 05:15:14,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:14,763 INFO L482 AbstractCegarLoop]: Abstraction has 7415 states and 32497 transitions. [2021-06-05 05:15:14,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:14,763 INFO L276 IsEmpty]: Start isEmpty. Operand 7415 states and 32497 transitions. [2021-06-05 05:15:14,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:14,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:14,777 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, 1, 1, 1] [2021-06-05 05:15:14,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 05:15:14,978 INFO L430 AbstractCegarLoop]: === Iteration 170 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:14,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:14,978 INFO L82 PathProgramCache]: Analyzing trace with hash 599548178, now seen corresponding path program 89 times [2021-06-05 05:15:14,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:14,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474701749] [2021-06-05 05:15:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:15,139 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 05:15:15,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:15,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474701749] [2021-06-05 05:15:15,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474701749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:15,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369337858] [2021-06-05 05:15:15,139 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 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 05:15:15,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:15:15,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:15,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:15,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:15,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:15,299 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 29 treesize of output 13 [2021-06-05 05:15:15,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:15,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:15,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:15,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:15:15,407 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 05:15:15,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369337858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:15,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:15,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:15:15,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594345392] [2021-06-05 05:15:15,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:15,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:15,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:15,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:15,408 INFO L87 Difference]: Start difference. First operand 7415 states and 32497 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:16,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:16,531 INFO L93 Difference]: Finished difference Result 8337 states and 35978 transitions. [2021-06-05 05:15:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:15:16,532 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:15:16,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:16,551 INFO L225 Difference]: With dead ends: 8337 [2021-06-05 05:15:16,551 INFO L226 Difference]: Without dead ends: 8315 [2021-06-05 05:15:16,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 975.5ms TimeCoverageRelationStatistics Valid=296, Invalid=1684, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:15:16,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8315 states. [2021-06-05 05:15:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8315 to 7403. [2021-06-05 05:15:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7403 states, 7402 states have (on average 4.384085382329101) internal successors, (32451), 7402 states have internal predecessors, (32451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7403 states to 7403 states and 32451 transitions. [2021-06-05 05:15:16,687 INFO L78 Accepts]: Start accepts. Automaton has 7403 states and 32451 transitions. Word has length 33 [2021-06-05 05:15:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:16,687 INFO L482 AbstractCegarLoop]: Abstraction has 7403 states and 32451 transitions. [2021-06-05 05:15:16,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7403 states and 32451 transitions. [2021-06-05 05:15:16,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:16,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:16,699 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, 1, 1, 1] [2021-06-05 05:15:16,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:16,899 INFO L430 AbstractCegarLoop]: === Iteration 171 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:16,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:16,900 INFO L82 PathProgramCache]: Analyzing trace with hash 697235702, now seen corresponding path program 90 times [2021-06-05 05:15:16,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:16,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976809185] [2021-06-05 05:15:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:17,085 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 05:15:17,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:17,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976809185] [2021-06-05 05:15:17,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976809185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:17,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400685316] [2021-06-05 05:15:17,085 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 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 05:15:17,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:15:17,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:17,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:17,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:17,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:17,281 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:15:17,281 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 29 treesize of output 57 [2021-06-05 05:15:17,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:17,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:17,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:17,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 05:15:17,552 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 05:15:17,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400685316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:17,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:17,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:15:17,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141734461] [2021-06-05 05:15:17,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:15:17,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:17,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:15:17,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:15:17,553 INFO L87 Difference]: Start difference. First operand 7403 states and 32451 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:19,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:19,107 INFO L93 Difference]: Finished difference Result 8214 states and 35625 transitions. [2021-06-05 05:15:19,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:15:19,108 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:15:19,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:19,126 INFO L225 Difference]: With dead ends: 8214 [2021-06-05 05:15:19,127 INFO L226 Difference]: Without dead ends: 8196 [2021-06-05 05:15:19,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1278.7ms TimeCoverageRelationStatistics Valid=370, Invalid=2180, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:15:19,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8196 states. [2021-06-05 05:15:19,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8196 to 7433. [2021-06-05 05:15:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7432 states have (on average 4.3850914962325085) internal successors, (32590), 7432 states have internal predecessors, (32590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 32590 transitions. [2021-06-05 05:15:19,255 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 32590 transitions. Word has length 33 [2021-06-05 05:15:19,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:19,255 INFO L482 AbstractCegarLoop]: Abstraction has 7433 states and 32590 transitions. [2021-06-05 05:15:19,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:19,255 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 32590 transitions. [2021-06-05 05:15:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:19,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:19,267 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, 1, 1, 1] [2021-06-05 05:15:19,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 05:15:19,467 INFO L430 AbstractCegarLoop]: === Iteration 172 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:19,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:19,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1466267072, now seen corresponding path program 91 times [2021-06-05 05:15:19,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:19,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230361262] [2021-06-05 05:15:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:19,709 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 05:15:19,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:19,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230361262] [2021-06-05 05:15:19,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230361262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:19,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111899274] [2021-06-05 05:15:19,709 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 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 05:15:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:19,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:19,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:19,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:19,866 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 29 treesize of output 13 [2021-06-05 05:15:19,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:19,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:19,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:19,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:15:19,967 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 05:15:19,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111899274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:19,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:19,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:15:19,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127670041] [2021-06-05 05:15:19,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:19,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:19,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:19,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:19,967 INFO L87 Difference]: Start difference. First operand 7433 states and 32590 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:21,853 INFO L93 Difference]: Finished difference Result 9052 states and 38657 transitions. [2021-06-05 05:15:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:15:21,854 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:15:21,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:21,874 INFO L225 Difference]: With dead ends: 9052 [2021-06-05 05:15:21,874 INFO L226 Difference]: Without dead ends: 9006 [2021-06-05 05:15:21,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1710.6ms TimeCoverageRelationStatistics Valid=426, Invalid=2024, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:15:21,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9006 states. [2021-06-05 05:15:21,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9006 to 7635. [2021-06-05 05:15:21,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7635 states, 7634 states have (on average 4.387346083311501) internal successors, (33493), 7634 states have internal predecessors, (33493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:22,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7635 states to 7635 states and 33493 transitions. [2021-06-05 05:15:22,008 INFO L78 Accepts]: Start accepts. Automaton has 7635 states and 33493 transitions. Word has length 33 [2021-06-05 05:15:22,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:22,008 INFO L482 AbstractCegarLoop]: Abstraction has 7635 states and 33493 transitions. [2021-06-05 05:15:22,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 7635 states and 33493 transitions. [2021-06-05 05:15:22,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:22,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:22,021 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, 1, 1, 1] [2021-06-05 05:15:22,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:22,222 INFO L430 AbstractCegarLoop]: === Iteration 173 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:22,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:22,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1982724672, now seen corresponding path program 92 times [2021-06-05 05:15:22,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:22,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400288075] [2021-06-05 05:15:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:22,484 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 05:15:22,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:22,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400288075] [2021-06-05 05:15:22,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400288075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:22,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098152695] [2021-06-05 05:15:22,484 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 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 05:15:22,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:22,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:22,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:22,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:22,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:22,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 05:15:22,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:22,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:22,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:22,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 05:15:22,869 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 05:15:22,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098152695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:22,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:22,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:15:22,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624069450] [2021-06-05 05:15:22,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:15:22,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:22,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:15:22,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:15:22,870 INFO L87 Difference]: Start difference. First operand 7635 states and 33493 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 05:15:23,040 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-05 05:15:23,188 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-06-05 05:15:26,560 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-06-05 05:15:26,704 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-05 05:15:26,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:26,891 INFO L93 Difference]: Finished difference Result 9884 states and 40976 transitions. [2021-06-05 05:15:26,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 05:15:26,891 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 05:15:26,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:26,912 INFO L225 Difference]: With dead ends: 9884 [2021-06-05 05:15:26,912 INFO L226 Difference]: Without dead ends: 9823 [2021-06-05 05:15:26,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 3612.3ms TimeCoverageRelationStatistics Valid=766, Invalid=4490, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:15:26,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9823 states. [2021-06-05 05:15:27,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9823 to 7619. [2021-06-05 05:15:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7619 states, 7618 states have (on average 4.385271724862169) internal successors, (33407), 7618 states have internal predecessors, (33407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:27,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7619 states to 7619 states and 33407 transitions. [2021-06-05 05:15:27,041 INFO L78 Accepts]: Start accepts. Automaton has 7619 states and 33407 transitions. Word has length 33 [2021-06-05 05:15:27,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:27,041 INFO L482 AbstractCegarLoop]: Abstraction has 7619 states and 33407 transitions. [2021-06-05 05:15:27,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 05:15:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 7619 states and 33407 transitions. [2021-06-05 05:15:27,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:27,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:27,053 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, 1, 1, 1] [2021-06-05 05:15:27,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 05:15:27,254 INFO L430 AbstractCegarLoop]: === Iteration 174 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:27,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:27,254 INFO L82 PathProgramCache]: Analyzing trace with hash 80104424, now seen corresponding path program 93 times [2021-06-05 05:15:27,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:27,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466003563] [2021-06-05 05:15:27,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:27,472 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 05:15:27,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:27,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466003563] [2021-06-05 05:15:27,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466003563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:27,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808422863] [2021-06-05 05:15:27,472 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 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 05:15:27,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:15:27,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:27,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:27,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:27,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:27,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:27,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:27,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:27,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:27,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:15:27,879 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 05:15:27,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808422863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:27,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:27,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:15:27,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676678616] [2021-06-05 05:15:27,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:15:27,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:27,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:15:27,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:15:27,880 INFO L87 Difference]: Start difference. First operand 7619 states and 33407 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:28,202 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 05:15:29,315 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-06-05 05:15:30,912 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 05:15:31,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:31,315 INFO L93 Difference]: Finished difference Result 9547 states and 39936 transitions. [2021-06-05 05:15:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:15:31,316 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:15:31,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:31,335 INFO L225 Difference]: With dead ends: 9547 [2021-06-05 05:15:31,335 INFO L226 Difference]: Without dead ends: 9489 [2021-06-05 05:15:31,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 2779.9ms TimeCoverageRelationStatistics Valid=466, Invalid=3566, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:15:31,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9489 states. [2021-06-05 05:15:31,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9489 to 7622. [2021-06-05 05:15:31,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7622 states, 7621 states have (on average 4.383939115601627) internal successors, (33410), 7621 states have internal predecessors, (33410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7622 states to 7622 states and 33410 transitions. [2021-06-05 05:15:31,464 INFO L78 Accepts]: Start accepts. Automaton has 7622 states and 33410 transitions. Word has length 33 [2021-06-05 05:15:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:31,464 INFO L482 AbstractCegarLoop]: Abstraction has 7622 states and 33410 transitions. [2021-06-05 05:15:31,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 7622 states and 33410 transitions. [2021-06-05 05:15:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:31,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:31,477 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, 1, 1, 1] [2021-06-05 05:15:31,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:31,678 INFO L430 AbstractCegarLoop]: === Iteration 175 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:31,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:31,678 INFO L82 PathProgramCache]: Analyzing trace with hash -2130270074, now seen corresponding path program 94 times [2021-06-05 05:15:31,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:31,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059515209] [2021-06-05 05:15:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:31,894 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 05:15:31,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:31,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059515209] [2021-06-05 05:15:31,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059515209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:31,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647244887] [2021-06-05 05:15:31,894 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 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 05:15:31,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:31,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:31,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:31,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:32,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:32,053 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 29 treesize of output 13 [2021-06-05 05:15:32,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:32,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:32,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:32,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:15:32,152 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 05:15:32,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647244887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:32,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:32,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:15:32,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565555549] [2021-06-05 05:15:32,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:32,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:32,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:32,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:32,153 INFO L87 Difference]: Start difference. First operand 7622 states and 33410 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:15:33,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:33,862 INFO L93 Difference]: Finished difference Result 9325 states and 39002 transitions. [2021-06-05 05:15:33,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:15:33,862 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:15:33,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:33,883 INFO L225 Difference]: With dead ends: 9325 [2021-06-05 05:15:33,883 INFO L226 Difference]: Without dead ends: 9285 [2021-06-05 05:15:33,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1483.8ms TimeCoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:15:33,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9285 states. [2021-06-05 05:15:33,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9285 to 7617. [2021-06-05 05:15:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7617 states, 7616 states have (on average 4.384322478991597) internal successors, (33391), 7616 states have internal predecessors, (33391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:34,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7617 states to 7617 states and 33391 transitions. [2021-06-05 05:15:34,018 INFO L78 Accepts]: Start accepts. Automaton has 7617 states and 33391 transitions. Word has length 33 [2021-06-05 05:15:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:34,018 INFO L482 AbstractCegarLoop]: Abstraction has 7617 states and 33391 transitions. [2021-06-05 05:15:34,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:15:34,018 INFO L276 IsEmpty]: Start isEmpty. Operand 7617 states and 33391 transitions. [2021-06-05 05:15:34,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:34,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:34,030 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, 1, 1, 1] [2021-06-05 05:15:34,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 05:15:34,231 INFO L430 AbstractCegarLoop]: === Iteration 176 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:34,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:34,231 INFO L82 PathProgramCache]: Analyzing trace with hash -564757444, now seen corresponding path program 95 times [2021-06-05 05:15:34,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:34,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236647814] [2021-06-05 05:15:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:34,478 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 05:15:34,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:34,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236647814] [2021-06-05 05:15:34,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236647814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:34,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891271924] [2021-06-05 05:15:34,478 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 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 05:15:34,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:15:34,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:34,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:34,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:34,652 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 05:15:34,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:34,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:34,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:34,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 05:15:34,764 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 05:15:34,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891271924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:34,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:34,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:15:34,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138445233] [2021-06-05 05:15:34,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:34,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:34,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:34,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:34,765 INFO L87 Difference]: Start difference. First operand 7617 states and 33391 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:35,386 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-05 05:15:37,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:37,010 INFO L93 Difference]: Finished difference Result 9249 states and 39615 transitions. [2021-06-05 05:15:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:15:37,010 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:15:37,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:37,031 INFO L225 Difference]: With dead ends: 9249 [2021-06-05 05:15:37,031 INFO L226 Difference]: Without dead ends: 9194 [2021-06-05 05:15:37,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1935.2ms TimeCoverageRelationStatistics Valid=499, Invalid=2581, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:15:37,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9194 states. [2021-06-05 05:15:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9194 to 7786. [2021-06-05 05:15:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7786 states, 7785 states have (on average 4.383815028901734) internal successors, (34128), 7785 states have internal predecessors, (34128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:37,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7786 states to 7786 states and 34128 transitions. [2021-06-05 05:15:37,165 INFO L78 Accepts]: Start accepts. Automaton has 7786 states and 34128 transitions. Word has length 33 [2021-06-05 05:15:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:37,165 INFO L482 AbstractCegarLoop]: Abstraction has 7786 states and 34128 transitions. [2021-06-05 05:15:37,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 7786 states and 34128 transitions. [2021-06-05 05:15:37,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:37,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:37,178 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, 1, 1, 1] [2021-06-05 05:15:37,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:37,378 INFO L430 AbstractCegarLoop]: === Iteration 177 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:37,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:37,378 INFO L82 PathProgramCache]: Analyzing trace with hash 281218108, now seen corresponding path program 96 times [2021-06-05 05:15:37,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:37,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050652116] [2021-06-05 05:15:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:37,604 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 05:15:37,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:37,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050652116] [2021-06-05 05:15:37,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050652116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:37,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176926834] [2021-06-05 05:15:37,604 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 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 05:15:37,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:15:37,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:37,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:15:37,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:37,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:37,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:37,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:37,785 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 23 treesize of output 31 [2021-06-05 05:15:37,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:37,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:37,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:37,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:15:37,965 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 05:15:37,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176926834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:37,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:37,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:15:37,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88081585] [2021-06-05 05:15:37,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:15:37,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:37,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:15:37,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:15:37,965 INFO L87 Difference]: Start difference. First operand 7786 states and 34128 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 05:15:40,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:40,434 INFO L93 Difference]: Finished difference Result 9842 states and 40877 transitions. [2021-06-05 05:15:40,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:15:40,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 05:15:40,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:40,455 INFO L225 Difference]: With dead ends: 9842 [2021-06-05 05:15:40,455 INFO L226 Difference]: Without dead ends: 9781 [2021-06-05 05:15:40,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 2094.0ms TimeCoverageRelationStatistics Valid=580, Invalid=3202, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:15:40,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9781 states. [2021-06-05 05:15:40,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9781 to 7727. [2021-06-05 05:15:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7727 states, 7726 states have (on average 4.382863059798084) internal successors, (33862), 7726 states have internal predecessors, (33862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7727 states to 7727 states and 33862 transitions. [2021-06-05 05:15:40,592 INFO L78 Accepts]: Start accepts. Automaton has 7727 states and 33862 transitions. Word has length 33 [2021-06-05 05:15:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:40,592 INFO L482 AbstractCegarLoop]: Abstraction has 7727 states and 33862 transitions. [2021-06-05 05:15:40,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 05:15:40,592 INFO L276 IsEmpty]: Start isEmpty. Operand 7727 states and 33862 transitions. [2021-06-05 05:15:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:40,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:40,604 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, 1, 1, 1] [2021-06-05 05:15:40,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-05 05:15:40,805 INFO L430 AbstractCegarLoop]: === Iteration 178 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:40,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:40,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1013033082, now seen corresponding path program 97 times [2021-06-05 05:15:40,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:40,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923139154] [2021-06-05 05:15:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:40,975 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 05:15:40,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:40,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923139154] [2021-06-05 05:15:40,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923139154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:40,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815220105] [2021-06-05 05:15:40,976 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 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 05:15:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:41,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:41,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:41,131 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 05:15:41,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:41,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:41,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:41,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 05:15:41,245 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 05:15:41,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815220105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:41,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:41,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:15:41,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577422604] [2021-06-05 05:15:41,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:41,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:41,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:41,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:41,246 INFO L87 Difference]: Start difference. First operand 7727 states and 33862 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:42,523 INFO L93 Difference]: Finished difference Result 8661 states and 37445 transitions. [2021-06-05 05:15:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:15:42,523 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:15:42,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:42,545 INFO L225 Difference]: With dead ends: 8661 [2021-06-05 05:15:42,545 INFO L226 Difference]: Without dead ends: 8579 [2021-06-05 05:15:42,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1097.8ms TimeCoverageRelationStatistics Valid=326, Invalid=1744, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:15:42,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8579 states. [2021-06-05 05:15:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8579 to 7712. [2021-06-05 05:15:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7712 states, 7711 states have (on average 4.384515627026326) internal successors, (33809), 7711 states have internal predecessors, (33809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:42,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7712 states to 7712 states and 33809 transitions. [2021-06-05 05:15:42,675 INFO L78 Accepts]: Start accepts. Automaton has 7712 states and 33809 transitions. Word has length 33 [2021-06-05 05:15:42,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:42,675 INFO L482 AbstractCegarLoop]: Abstraction has 7712 states and 33809 transitions. [2021-06-05 05:15:42,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:42,676 INFO L276 IsEmpty]: Start isEmpty. Operand 7712 states and 33809 transitions. [2021-06-05 05:15:42,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:42,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:42,693 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, 1, 1, 1] [2021-06-05 05:15:42,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 05:15:42,897 INFO L430 AbstractCegarLoop]: === Iteration 179 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:42,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:42,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1100992010, now seen corresponding path program 98 times [2021-06-05 05:15:42,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:42,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188845390] [2021-06-05 05:15:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:43,051 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 05:15:43,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:43,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188845390] [2021-06-05 05:15:43,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188845390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:43,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002872175] [2021-06-05 05:15:43,052 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 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 05:15:43,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:43,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:43,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:43,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:43,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:43,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:15:43,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:43,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:43,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:43,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 05:15:43,408 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 05:15:43,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002872175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:43,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:43,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 05:15:43,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103420905] [2021-06-05 05:15:43,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:43,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:43,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:43,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:43,409 INFO L87 Difference]: Start difference. First operand 7712 states and 33809 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) 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 05:15:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:45,170 INFO L93 Difference]: Finished difference Result 8666 states and 37399 transitions. [2021-06-05 05:15:45,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:15:45,170 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 33 [2021-06-05 05:15:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:45,190 INFO L225 Difference]: With dead ends: 8666 [2021-06-05 05:15:45,190 INFO L226 Difference]: Without dead ends: 8648 [2021-06-05 05:15:45,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1336.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:15:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8648 states. [2021-06-05 05:15:45,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8648 to 7712. [2021-06-05 05:15:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7712 states, 7711 states have (on average 4.383607832965893) internal successors, (33802), 7711 states have internal predecessors, (33802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7712 states to 7712 states and 33802 transitions. [2021-06-05 05:15:45,317 INFO L78 Accepts]: Start accepts. Automaton has 7712 states and 33802 transitions. Word has length 33 [2021-06-05 05:15:45,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:45,317 INFO L482 AbstractCegarLoop]: Abstraction has 7712 states and 33802 transitions. [2021-06-05 05:15:45,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 05:15:45,317 INFO L276 IsEmpty]: Start isEmpty. Operand 7712 states and 33802 transitions. [2021-06-05 05:15:45,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:45,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:45,329 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, 1, 1, 1] [2021-06-05 05:15:45,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 05:15:45,531 INFO L430 AbstractCegarLoop]: === Iteration 180 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:45,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:45,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1870023380, now seen corresponding path program 99 times [2021-06-05 05:15:45,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:45,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237685283] [2021-06-05 05:15:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:45,782 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 05:15:45,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:45,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237685283] [2021-06-05 05:15:45,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237685283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:45,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523901022] [2021-06-05 05:15:45,782 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 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 05:15:45,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:15:45,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:45,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:45,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:45,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:45,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:15:45,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:45,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:45,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:45,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 05:15:46,177 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 05:15:46,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523901022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:46,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:46,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:15:46,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314823712] [2021-06-05 05:15:46,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:15:46,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:46,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:15:46,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:15:46,178 INFO L87 Difference]: Start difference. First operand 7712 states and 33802 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:46,308 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-05 05:15:46,477 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-05 05:15:49,219 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-05 05:15:49,464 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 05:15:49,738 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-05 05:15:49,894 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-06-05 05:15:50,064 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-06-05 05:15:50,219 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 05:15:50,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:50,687 INFO L93 Difference]: Finished difference Result 9381 states and 39903 transitions. [2021-06-05 05:15:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:15:50,687 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:15:50,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:50,707 INFO L225 Difference]: With dead ends: 9381 [2021-06-05 05:15:50,707 INFO L226 Difference]: Without dead ends: 9335 [2021-06-05 05:15:50,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 3772.8ms TimeCoverageRelationStatistics Valid=711, Invalid=4545, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:15:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9335 states. [2021-06-05 05:15:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9335 to 7775. [2021-06-05 05:15:50,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7775 states, 7774 states have (on average 4.39104708001029) internal successors, (34136), 7774 states have internal predecessors, (34136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:50,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7775 states to 7775 states and 34136 transitions. [2021-06-05 05:15:50,840 INFO L78 Accepts]: Start accepts. Automaton has 7775 states and 34136 transitions. Word has length 33 [2021-06-05 05:15:50,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:50,840 INFO L482 AbstractCegarLoop]: Abstraction has 7775 states and 34136 transitions. [2021-06-05 05:15:50,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:50,840 INFO L276 IsEmpty]: Start isEmpty. Operand 7775 states and 34136 transitions. [2021-06-05 05:15:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:50,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:50,852 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, 1, 1, 1] [2021-06-05 05:15:51,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:51,053 INFO L430 AbstractCegarLoop]: === Iteration 181 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:51,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:51,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1578968364, now seen corresponding path program 100 times [2021-06-05 05:15:51,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:51,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835064159] [2021-06-05 05:15:51,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:51,275 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 05:15:51,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:51,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835064159] [2021-06-05 05:15:51,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835064159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:51,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901209056] [2021-06-05 05:15:51,275 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 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 05:15:51,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:51,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:51,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:51,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:51,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:51,450 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 28 treesize of output 12 [2021-06-05 05:15:51,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:51,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:51,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:51,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:15:51,530 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 05:15:51,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901209056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:51,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:51,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:15:51,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220028830] [2021-06-05 05:15:51,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:51,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:51,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:51,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:51,531 INFO L87 Difference]: Start difference. First operand 7775 states and 34136 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:15:52,098 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 05:15:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:54,890 INFO L93 Difference]: Finished difference Result 10709 states and 44029 transitions. [2021-06-05 05:15:54,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:15:54,890 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:15:54,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:54,912 INFO L225 Difference]: With dead ends: 10709 [2021-06-05 05:15:54,912 INFO L226 Difference]: Without dead ends: 10589 [2021-06-05 05:15:54,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 2960.7ms TimeCoverageRelationStatistics Valid=795, Invalid=4461, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:15:54,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10589 states. [2021-06-05 05:15:55,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10589 to 7771. [2021-06-05 05:15:55,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7771 states, 7770 states have (on average 4.385585585585585) internal successors, (34076), 7770 states have internal predecessors, (34076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:55,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7771 states to 7771 states and 34076 transitions. [2021-06-05 05:15:55,061 INFO L78 Accepts]: Start accepts. Automaton has 7771 states and 34076 transitions. Word has length 33 [2021-06-05 05:15:55,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:55,061 INFO L482 AbstractCegarLoop]: Abstraction has 7771 states and 34076 transitions. [2021-06-05 05:15:55,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:15:55,061 INFO L276 IsEmpty]: Start isEmpty. Operand 7771 states and 34076 transitions. [2021-06-05 05:15:55,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:55,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:55,074 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, 1, 1, 1] [2021-06-05 05:15:55,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 05:15:55,274 INFO L430 AbstractCegarLoop]: === Iteration 182 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:55,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:55,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1050522736, now seen corresponding path program 101 times [2021-06-05 05:15:55,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:55,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59617893] [2021-06-05 05:15:55,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:55,425 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 05:15:55,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:55,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59617893] [2021-06-05 05:15:55,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59617893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:55,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966106112] [2021-06-05 05:15:55,425 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 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 05:15:55,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:15:55,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:55,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:55,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:55,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:55,628 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 28 treesize of output 12 [2021-06-05 05:15:55,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:55,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:55,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:55,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:15:55,707 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 05:15:55,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966106112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:55,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:55,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:15:55,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098699585] [2021-06-05 05:15:55,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:55,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:55,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:55,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:55,708 INFO L87 Difference]: Start difference. First operand 7771 states and 34076 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:56,771 INFO L93 Difference]: Finished difference Result 8812 states and 38001 transitions. [2021-06-05 05:15:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:15:56,772 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:15:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:56,797 INFO L225 Difference]: With dead ends: 8812 [2021-06-05 05:15:56,797 INFO L226 Difference]: Without dead ends: 8774 [2021-06-05 05:15:56,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 834.0ms TimeCoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:15:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2021-06-05 05:15:56,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 7763. [2021-06-05 05:15:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7763 states, 7762 states have (on average 4.3852099974233445) internal successors, (34038), 7762 states have internal predecessors, (34038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7763 states to 7763 states and 34038 transitions. [2021-06-05 05:15:56,925 INFO L78 Accepts]: Start accepts. Automaton has 7763 states and 34038 transitions. Word has length 33 [2021-06-05 05:15:56,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:56,925 INFO L482 AbstractCegarLoop]: Abstraction has 7763 states and 34038 transitions. [2021-06-05 05:15:56,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:56,925 INFO L276 IsEmpty]: Start isEmpty. Operand 7763 states and 34038 transitions. [2021-06-05 05:15:56,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:56,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:56,937 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, 1, 1, 1] [2021-06-05 05:15:57,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 05:15:57,138 INFO L430 AbstractCegarLoop]: === Iteration 183 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:57,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:57,138 INFO L82 PathProgramCache]: Analyzing trace with hash 158384902, now seen corresponding path program 102 times [2021-06-05 05:15:57,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:57,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308682488] [2021-06-05 05:15:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:57,302 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 05:15:57,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:57,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308682488] [2021-06-05 05:15:57,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308682488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:57,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85107346] [2021-06-05 05:15:57,303 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 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 05:15:57,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:15:57,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:57,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:57,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:57,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:57,567 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:15:57,567 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 27 treesize of output 55 [2021-06-05 05:15:57,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:15:57,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:57,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:57,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 05:15:57,694 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 05:15:57,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85107346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:57,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:57,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:15:57,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972894926] [2021-06-05 05:15:57,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:15:57,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:57,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:15:57,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:15:57,695 INFO L87 Difference]: Start difference. First operand 7763 states and 34038 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:59,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:59,244 INFO L93 Difference]: Finished difference Result 8447 states and 36700 transitions. [2021-06-05 05:15:59,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:15:59,245 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:15:59,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:59,264 INFO L225 Difference]: With dead ends: 8447 [2021-06-05 05:15:59,264 INFO L226 Difference]: Without dead ends: 8396 [2021-06-05 05:15:59,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1203.4ms TimeCoverageRelationStatistics Valid=216, Invalid=1946, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:15:59,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8396 states. [2021-06-05 05:15:59,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8396 to 7750. [2021-06-05 05:15:59,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7750 states, 7749 states have (on average 4.387017679700606) internal successors, (33995), 7749 states have internal predecessors, (33995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:59,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7750 states to 7750 states and 33995 transitions. [2021-06-05 05:15:59,387 INFO L78 Accepts]: Start accepts. Automaton has 7750 states and 33995 transitions. Word has length 33 [2021-06-05 05:15:59,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:59,387 INFO L482 AbstractCegarLoop]: Abstraction has 7750 states and 33995 transitions. [2021-06-05 05:15:59,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 7750 states and 33995 transitions. [2021-06-05 05:15:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:15:59,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:59,399 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, 1, 1, 1] [2021-06-05 05:15:59,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 05:15:59,600 INFO L430 AbstractCegarLoop]: === Iteration 184 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:59,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:59,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1106864046, now seen corresponding path program 103 times [2021-06-05 05:15:59,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:59,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339851529] [2021-06-05 05:15:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:59,778 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 05:15:59,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:59,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339851529] [2021-06-05 05:15:59,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339851529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:59,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109101515] [2021-06-05 05:15:59,779 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 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 05:15:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:59,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:15:59,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:59,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:59,938 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 29 treesize of output 13 [2021-06-05 05:15:59,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:59,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:59,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:59,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:16:00,030 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 05:16:00,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109101515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:00,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:00,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:16:00,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425194961] [2021-06-05 05:16:00,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:00,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:00,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:00,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:00,031 INFO L87 Difference]: Start difference. First operand 7750 states and 33995 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:16:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:01,195 INFO L93 Difference]: Finished difference Result 8748 states and 37700 transitions. [2021-06-05 05:16:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:16:01,195 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:16:01,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:01,214 INFO L225 Difference]: With dead ends: 8748 [2021-06-05 05:16:01,214 INFO L226 Difference]: Without dead ends: 8720 [2021-06-05 05:16:01,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 893.8ms TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:16:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8720 states. [2021-06-05 05:16:01,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8720 to 7890. [2021-06-05 05:16:01,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7890 states, 7889 states have (on average 4.385853720370136) internal successors, (34600), 7889 states have internal predecessors, (34600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7890 states to 7890 states and 34600 transitions. [2021-06-05 05:16:01,347 INFO L78 Accepts]: Start accepts. Automaton has 7890 states and 34600 transitions. Word has length 33 [2021-06-05 05:16:01,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:01,347 INFO L482 AbstractCegarLoop]: Abstraction has 7890 states and 34600 transitions. [2021-06-05 05:16:01,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:16:01,348 INFO L276 IsEmpty]: Start isEmpty. Operand 7890 states and 34600 transitions. [2021-06-05 05:16:01,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:01,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:01,360 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, 1, 1, 1] [2021-06-05 05:16:01,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:01,561 INFO L430 AbstractCegarLoop]: === Iteration 185 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:01,561 INFO L82 PathProgramCache]: Analyzing trace with hash -337832676, now seen corresponding path program 104 times [2021-06-05 05:16:01,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:01,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877943228] [2021-06-05 05:16:01,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:01,795 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 05:16:01,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:01,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877943228] [2021-06-05 05:16:01,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877943228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:01,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201398863] [2021-06-05 05:16:01,796 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 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 05:16:01,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:01,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:01,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:16:01,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:01,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:01,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:01,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:01,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:01,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:01,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:16:02,268 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 05:16:02,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201398863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:02,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:02,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:16:02,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185645208] [2021-06-05 05:16:02,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:16:02,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:02,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:16:02,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:16:02,269 INFO L87 Difference]: Start difference. First operand 7890 states and 34600 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:02,418 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 05:16:02,616 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-06-05 05:16:04,221 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-05 05:16:05,871 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 05:16:06,284 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 05:16:06,418 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-05 05:16:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:06,671 INFO L93 Difference]: Finished difference Result 9661 states and 41118 transitions. [2021-06-05 05:16:06,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:16:06,672 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:16:06,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:06,693 INFO L225 Difference]: With dead ends: 9661 [2021-06-05 05:16:06,694 INFO L226 Difference]: Without dead ends: 9615 [2021-06-05 05:16:06,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 3786.3ms TimeCoverageRelationStatistics Valid=613, Invalid=4217, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:16:06,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9615 states. [2021-06-05 05:16:06,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 7890. [2021-06-05 05:16:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7890 states, 7889 states have (on average 4.385853720370136) internal successors, (34600), 7889 states have internal predecessors, (34600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:06,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7890 states to 7890 states and 34600 transitions. [2021-06-05 05:16:06,839 INFO L78 Accepts]: Start accepts. Automaton has 7890 states and 34600 transitions. Word has length 33 [2021-06-05 05:16:06,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:06,839 INFO L482 AbstractCegarLoop]: Abstraction has 7890 states and 34600 transitions. [2021-06-05 05:16:06,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:06,840 INFO L276 IsEmpty]: Start isEmpty. Operand 7890 states and 34600 transitions. [2021-06-05 05:16:06,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:06,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:06,852 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, 1, 1, 1] [2021-06-05 05:16:07,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 05:16:07,053 INFO L430 AbstractCegarLoop]: === Iteration 186 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:07,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:07,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2118430978, now seen corresponding path program 105 times [2021-06-05 05:16:07,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:07,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180759315] [2021-06-05 05:16:07,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:07,342 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 05:16:07,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:07,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180759315] [2021-06-05 05:16:07,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180759315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:07,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164103106] [2021-06-05 05:16:07,342 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 05:16:07,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:16:07,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:07,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:16:07,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:07,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:07,545 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:16:07,545 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 29 treesize of output 57 [2021-06-05 05:16:07,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:07,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:07,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:07,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 05:16:07,766 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 05:16:07,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164103106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:07,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:07,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:16:07,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801622036] [2021-06-05 05:16:07,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:16:07,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:07,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:16:07,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:16:07,767 INFO L87 Difference]: Start difference. First operand 7890 states and 34600 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:09,892 INFO L93 Difference]: Finished difference Result 8926 states and 38371 transitions. [2021-06-05 05:16:09,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:16:09,892 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:16:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:09,912 INFO L225 Difference]: With dead ends: 8926 [2021-06-05 05:16:09,912 INFO L226 Difference]: Without dead ends: 8867 [2021-06-05 05:16:09,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1811.9ms TimeCoverageRelationStatistics Valid=417, Invalid=2663, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:16:09,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8867 states. [2021-06-05 05:16:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8867 to 7954. [2021-06-05 05:16:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7954 states, 7953 states have (on average 4.3871495033320755) internal successors, (34891), 7953 states have internal predecessors, (34891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:10,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 34891 transitions. [2021-06-05 05:16:10,053 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 34891 transitions. Word has length 33 [2021-06-05 05:16:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:10,053 INFO L482 AbstractCegarLoop]: Abstraction has 7954 states and 34891 transitions. [2021-06-05 05:16:10,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:10,053 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 34891 transitions. [2021-06-05 05:16:10,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:10,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:10,065 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, 1, 1, 1] [2021-06-05 05:16:10,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:10,266 INFO L430 AbstractCegarLoop]: === Iteration 187 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:10,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1723995324, now seen corresponding path program 106 times [2021-06-05 05:16:10,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:10,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403692329] [2021-06-05 05:16:10,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:10,502 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 05:16:10,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:10,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403692329] [2021-06-05 05:16:10,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403692329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:10,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056343758] [2021-06-05 05:16:10,503 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 05:16:10,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:10,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:10,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:16:10,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:10,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:10,671 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 29 treesize of output 13 [2021-06-05 05:16:10,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:10,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:10,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:10,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:16:10,777 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 05:16:10,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056343758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:10,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:10,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:16:10,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146371047] [2021-06-05 05:16:10,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:10,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:10,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:10,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:10,778 INFO L87 Difference]: Start difference. First operand 7954 states and 34891 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:12,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:12,699 INFO L93 Difference]: Finished difference Result 9528 states and 40289 transitions. [2021-06-05 05:16:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:16:12,699 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:16:12,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:12,720 INFO L225 Difference]: With dead ends: 9528 [2021-06-05 05:16:12,720 INFO L226 Difference]: Without dead ends: 9499 [2021-06-05 05:16:12,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1655.2ms TimeCoverageRelationStatistics Valid=284, Invalid=2266, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:16:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9499 states. [2021-06-05 05:16:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9499 to 7954. [2021-06-05 05:16:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7954 states, 7953 states have (on average 4.3871495033320755) internal successors, (34891), 7953 states have internal predecessors, (34891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 34891 transitions. [2021-06-05 05:16:12,860 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 34891 transitions. Word has length 33 [2021-06-05 05:16:12,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:12,860 INFO L482 AbstractCegarLoop]: Abstraction has 7954 states and 34891 transitions. [2021-06-05 05:16:12,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:12,861 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 34891 transitions. [2021-06-05 05:16:12,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:12,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:12,873 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, 1, 1, 1] [2021-06-05 05:16:13,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 05:16:13,074 INFO L430 AbstractCegarLoop]: === Iteration 188 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:13,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:13,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2077134814, now seen corresponding path program 107 times [2021-06-05 05:16:13,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:13,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977557378] [2021-06-05 05:16:13,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:13,289 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 05:16:13,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:13,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977557378] [2021-06-05 05:16:13,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977557378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:13,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035996829] [2021-06-05 05:16:13,289 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 05:16:13,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:16:13,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:13,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:16:13,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:13,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:13,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:13,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:13,457 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 27 treesize of output 13 [2021-06-05 05:16:13,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:13,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:13,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:13,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:18 [2021-06-05 05:16:13,586 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 05:16:13,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035996829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:13,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:13,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:16:13,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762576045] [2021-06-05 05:16:13,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:16:13,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:13,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:16:13,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:16:13,587 INFO L87 Difference]: Start difference. First operand 7954 states and 34891 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:15,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:15,686 INFO L93 Difference]: Finished difference Result 8904 states and 38573 transitions. [2021-06-05 05:16:15,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:16:15,686 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:16:15,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:15,707 INFO L225 Difference]: With dead ends: 8904 [2021-06-05 05:16:15,707 INFO L226 Difference]: Without dead ends: 8838 [2021-06-05 05:16:15,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 1795.3ms TimeCoverageRelationStatistics Valid=372, Invalid=2708, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:16:15,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8838 states. [2021-06-05 05:16:15,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8838 to 7945. [2021-06-05 05:16:15,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7945 states, 7944 states have (on average 4.387839879154079) internal successors, (34857), 7944 states have internal predecessors, (34857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7945 states to 7945 states and 34857 transitions. [2021-06-05 05:16:15,907 INFO L78 Accepts]: Start accepts. Automaton has 7945 states and 34857 transitions. Word has length 33 [2021-06-05 05:16:15,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:15,907 INFO L482 AbstractCegarLoop]: Abstraction has 7945 states and 34857 transitions. [2021-06-05 05:16:15,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand 7945 states and 34857 transitions. [2021-06-05 05:16:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:15,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:15,920 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, 1, 1, 1] [2021-06-05 05:16:16,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 05:16:16,120 INFO L430 AbstractCegarLoop]: === Iteration 189 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:16,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:16,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1926110104, now seen corresponding path program 108 times [2021-06-05 05:16:16,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:16,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197072134] [2021-06-05 05:16:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:16,348 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 05:16:16,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:16,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197072134] [2021-06-05 05:16:16,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197072134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:16,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107374134] [2021-06-05 05:16:16,348 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 05:16:16,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:16:16,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:16,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:16:16,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:16,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:16,555 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:16:16,555 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 29 treesize of output 57 [2021-06-05 05:16:16,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:16,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:16,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:16,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 05:16:16,780 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 05:16:16,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107374134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:16,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:16,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:16:16,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410889447] [2021-06-05 05:16:16,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:16:16,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:16,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:16:16,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:16:16,781 INFO L87 Difference]: Start difference. First operand 7945 states and 34857 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:19,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:19,199 INFO L93 Difference]: Finished difference Result 8820 states and 38107 transitions. [2021-06-05 05:16:19,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:16:19,199 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:16:19,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:19,222 INFO L225 Difference]: With dead ends: 8820 [2021-06-05 05:16:19,222 INFO L226 Difference]: Without dead ends: 8774 [2021-06-05 05:16:19,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1963.5ms TimeCoverageRelationStatistics Valid=401, Invalid=2791, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:16:19,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2021-06-05 05:16:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 8003. [2021-06-05 05:16:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8003 states, 8002 states have (on average 4.392026993251687) internal successors, (35145), 8002 states have internal predecessors, (35145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8003 states to 8003 states and 35145 transitions. [2021-06-05 05:16:19,360 INFO L78 Accepts]: Start accepts. Automaton has 8003 states and 35145 transitions. Word has length 33 [2021-06-05 05:16:19,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:19,360 INFO L482 AbstractCegarLoop]: Abstraction has 8003 states and 35145 transitions. [2021-06-05 05:16:19,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:19,360 INFO L276 IsEmpty]: Start isEmpty. Operand 8003 states and 35145 transitions. [2021-06-05 05:16:19,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:19,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:19,373 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, 1, 1, 1] [2021-06-05 05:16:19,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:19,574 INFO L430 AbstractCegarLoop]: === Iteration 190 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:19,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:19,574 INFO L82 PathProgramCache]: Analyzing trace with hash 145511802, now seen corresponding path program 109 times [2021-06-05 05:16:19,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:19,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699299418] [2021-06-05 05:16:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:19,799 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 05:16:19,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:19,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699299418] [2021-06-05 05:16:19,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699299418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:19,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847689297] [2021-06-05 05:16:19,799 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 05:16:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:19,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:16:19,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:19,952 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 05:16:19,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:19,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:19,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:19,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 05:16:20,051 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 05:16:20,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847689297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:20,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:20,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:16:20,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913269834] [2021-06-05 05:16:20,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:20,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:20,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:20,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:20,051 INFO L87 Difference]: Start difference. First operand 8003 states and 35145 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:22,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:22,108 INFO L93 Difference]: Finished difference Result 9112 states and 39289 transitions. [2021-06-05 05:16:22,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:16:22,108 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:16:22,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:22,128 INFO L225 Difference]: With dead ends: 9112 [2021-06-05 05:16:22,128 INFO L226 Difference]: Without dead ends: 9085 [2021-06-05 05:16:22,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1691.5ms TimeCoverageRelationStatistics Valid=512, Invalid=3028, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:16:22,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9085 states. [2021-06-05 05:16:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9085 to 7994. [2021-06-05 05:16:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7994 states, 7993 states have (on average 4.392593519329413) internal successors, (35110), 7993 states have internal predecessors, (35110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 35110 transitions. [2021-06-05 05:16:22,265 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 35110 transitions. Word has length 33 [2021-06-05 05:16:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:22,265 INFO L482 AbstractCegarLoop]: Abstraction has 7994 states and 35110 transitions. [2021-06-05 05:16:22,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 35110 transitions. [2021-06-05 05:16:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:22,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:22,278 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, 1, 1, 1] [2021-06-05 05:16:22,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:22,479 INFO L430 AbstractCegarLoop]: === Iteration 191 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:22,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1522881640, now seen corresponding path program 110 times [2021-06-05 05:16:22,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:22,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956681267] [2021-06-05 05:16:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:22,710 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 05:16:22,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:22,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956681267] [2021-06-05 05:16:22,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956681267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:22,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652667736] [2021-06-05 05:16:22,710 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 05:16:22,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:22,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:22,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:16:22,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:22,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:22,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:22,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:22,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:22,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:22,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:16:23,128 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 05:16:23,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652667736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:23,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:23,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:16:23,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511440410] [2021-06-05 05:16:23,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:16:23,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:23,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:16:23,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:16:23,129 INFO L87 Difference]: Start difference. First operand 7994 states and 35110 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 05:16:23,260 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-06-05 05:16:23,476 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-06-05 05:16:24,279 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-06-05 05:16:24,769 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 05:16:27,419 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 05:16:27,571 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 05:16:27,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:27,760 INFO L93 Difference]: Finished difference Result 10579 states and 43957 transitions. [2021-06-05 05:16:27,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 05:16:27,761 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 05:16:27,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:27,784 INFO L225 Difference]: With dead ends: 10579 [2021-06-05 05:16:27,784 INFO L226 Difference]: Without dead ends: 10510 [2021-06-05 05:16:27,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 3758.3ms TimeCoverageRelationStatistics Valid=777, Invalid=5385, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:16:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10510 states. [2021-06-05 05:16:27,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10510 to 7987. [2021-06-05 05:16:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7987 states, 7986 states have (on average 4.390057600801402) internal successors, (35059), 7986 states have internal predecessors, (35059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7987 states to 7987 states and 35059 transitions. [2021-06-05 05:16:27,932 INFO L78 Accepts]: Start accepts. Automaton has 7987 states and 35059 transitions. Word has length 33 [2021-06-05 05:16:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:27,932 INFO L482 AbstractCegarLoop]: Abstraction has 7987 states and 35059 transitions. [2021-06-05 05:16:27,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 05:16:27,932 INFO L276 IsEmpty]: Start isEmpty. Operand 7987 states and 35059 transitions. [2021-06-05 05:16:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:27,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:27,945 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, 1, 1, 1] [2021-06-05 05:16:28,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:28,149 INFO L430 AbstractCegarLoop]: === Iteration 192 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:28,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1477834466, now seen corresponding path program 111 times [2021-06-05 05:16:28,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:28,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680422237] [2021-06-05 05:16:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:28,372 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 05:16:28,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:28,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680422237] [2021-06-05 05:16:28,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680422237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:28,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919902783] [2021-06-05 05:16:28,372 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 05:16:28,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:16:28,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:28,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:16:28,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:28,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:28,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:16:28,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:28,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:28,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:28,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:16:28,781 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 05:16:28,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919902783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:28,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:28,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:16:28,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963743903] [2021-06-05 05:16:28,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:16:28,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:28,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:16:28,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:16:28,782 INFO L87 Difference]: Start difference. First operand 7987 states and 35059 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:28,957 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-05 05:16:29,620 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-06-05 05:16:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:30,982 INFO L93 Difference]: Finished difference Result 8667 states and 37720 transitions. [2021-06-05 05:16:30,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:16:30,982 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:16:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:31,002 INFO L225 Difference]: With dead ends: 8667 [2021-06-05 05:16:31,002 INFO L226 Difference]: Without dead ends: 8636 [2021-06-05 05:16:31,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1812.1ms TimeCoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:16:31,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8636 states. [2021-06-05 05:16:31,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8636 to 7987. [2021-06-05 05:16:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7987 states, 7986 states have (on average 4.390057600801402) internal successors, (35059), 7986 states have internal predecessors, (35059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7987 states to 7987 states and 35059 transitions. [2021-06-05 05:16:31,137 INFO L78 Accepts]: Start accepts. Automaton has 7987 states and 35059 transitions. Word has length 33 [2021-06-05 05:16:31,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:31,137 INFO L482 AbstractCegarLoop]: Abstraction has 7987 states and 35059 transitions. [2021-06-05 05:16:31,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:31,138 INFO L276 IsEmpty]: Start isEmpty. Operand 7987 states and 35059 transitions. [2021-06-05 05:16:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:31,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:31,151 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, 1, 1, 1] [2021-06-05 05:16:31,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 05:16:31,353 INFO L430 AbstractCegarLoop]: === Iteration 193 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:31,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:31,353 INFO L82 PathProgramCache]: Analyzing trace with hash -561783982, now seen corresponding path program 112 times [2021-06-05 05:16:31,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:31,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614351306] [2021-06-05 05:16:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:31,521 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 05:16:31,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:31,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614351306] [2021-06-05 05:16:31,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614351306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:31,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373387707] [2021-06-05 05:16:31,522 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 05:16:31,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:31,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:31,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:16:31,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:31,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:31,680 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 29 treesize of output 13 [2021-06-05 05:16:31,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:31,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:31,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:31,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:16:31,771 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 05:16:31,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373387707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:31,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:31,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:16:31,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881995834] [2021-06-05 05:16:31,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:31,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:31,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:31,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:31,772 INFO L87 Difference]: Start difference. First operand 7987 states and 35059 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:16:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:32,808 INFO L93 Difference]: Finished difference Result 8641 states and 37516 transitions. [2021-06-05 05:16:32,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:16:32,809 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:16:32,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:32,828 INFO L225 Difference]: With dead ends: 8641 [2021-06-05 05:16:32,828 INFO L226 Difference]: Without dead ends: 8601 [2021-06-05 05:16:32,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 958.7ms TimeCoverageRelationStatistics Valid=322, Invalid=1748, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:16:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8601 states. [2021-06-05 05:16:32,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8601 to 7975. [2021-06-05 05:16:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7975 states, 7974 states have (on average 4.391647855530474) internal successors, (35019), 7974 states have internal predecessors, (35019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7975 states to 7975 states and 35019 transitions. [2021-06-05 05:16:32,955 INFO L78 Accepts]: Start accepts. Automaton has 7975 states and 35019 transitions. Word has length 33 [2021-06-05 05:16:32,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:32,955 INFO L482 AbstractCegarLoop]: Abstraction has 7975 states and 35019 transitions. [2021-06-05 05:16:32,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:16:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7975 states and 35019 transitions. [2021-06-05 05:16:32,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:32,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:32,968 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, 1, 1, 1] [2021-06-05 05:16:33,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 05:16:33,169 INFO L430 AbstractCegarLoop]: === Iteration 194 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:33,169 INFO L82 PathProgramCache]: Analyzing trace with hash -703107738, now seen corresponding path program 113 times [2021-06-05 05:16:33,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:33,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718985209] [2021-06-05 05:16:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:33,330 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 05:16:33,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:33,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718985209] [2021-06-05 05:16:33,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718985209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:33,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590940143] [2021-06-05 05:16:33,331 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 05:16:33,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:16:33,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:33,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:16:33,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:33,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:33,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-05 05:16:33,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:33,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:33,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:33,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:16:33,588 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 05:16:33,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590940143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:33,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:33,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:16:33,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057665740] [2021-06-05 05:16:33,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:33,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:33,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:33,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:33,589 INFO L87 Difference]: Start difference. First operand 7975 states and 35019 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:16:34,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:34,735 INFO L93 Difference]: Finished difference Result 9412 states and 40317 transitions. [2021-06-05 05:16:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:16:34,735 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:16:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:34,756 INFO L225 Difference]: With dead ends: 9412 [2021-06-05 05:16:34,756 INFO L226 Difference]: Without dead ends: 9363 [2021-06-05 05:16:34,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 872.0ms TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:16:34,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9363 states. [2021-06-05 05:16:34,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9363 to 8172. [2021-06-05 05:16:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8172 states, 8171 states have (on average 4.393097540080774) internal successors, (35896), 8171 states have internal predecessors, (35896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8172 states to 8172 states and 35896 transitions. [2021-06-05 05:16:34,917 INFO L78 Accepts]: Start accepts. Automaton has 8172 states and 35896 transitions. Word has length 33 [2021-06-05 05:16:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:34,917 INFO L482 AbstractCegarLoop]: Abstraction has 8172 states and 35896 transitions. [2021-06-05 05:16:34,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:16:34,917 INFO L276 IsEmpty]: Start isEmpty. Operand 8172 states and 35896 transitions. [2021-06-05 05:16:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:34,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:34,930 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, 1, 1, 1] [2021-06-05 05:16:35,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 05:16:35,130 INFO L430 AbstractCegarLoop]: === Iteration 195 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:35,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:35,131 INFO L82 PathProgramCache]: Analyzing trace with hash 65923632, now seen corresponding path program 114 times [2021-06-05 05:16:35,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:35,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945517629] [2021-06-05 05:16:35,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:35,356 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 05:16:35,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:35,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945517629] [2021-06-05 05:16:35,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945517629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:35,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162518658] [2021-06-05 05:16:35,356 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 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 05:16:35,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:16:35,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:35,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:16:35,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:35,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:35,599 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:16:35,599 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 27 treesize of output 55 [2021-06-05 05:16:35,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:16:35,623 INFO L628 ElimStorePlain]: treesize reduction 43, result has 33.8 percent of original size [2021-06-05 05:16:35,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:35,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 05:16:35,760 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 05:16:35,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162518658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:35,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:35,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:16:35,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685656713] [2021-06-05 05:16:35,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:16:35,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:35,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:16:35,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:16:35,761 INFO L87 Difference]: Start difference. First operand 8172 states and 35896 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:38,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:38,489 INFO L93 Difference]: Finished difference Result 9205 states and 39642 transitions. [2021-06-05 05:16:38,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:16:38,489 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:16:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:38,563 INFO L225 Difference]: With dead ends: 9205 [2021-06-05 05:16:38,563 INFO L226 Difference]: Without dead ends: 9159 [2021-06-05 05:16:38,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 2280.0ms TimeCoverageRelationStatistics Valid=468, Invalid=3438, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:16:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9159 states. [2021-06-05 05:16:38,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9159 to 8172. [2021-06-05 05:16:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8172 states, 8171 states have (on average 4.393097540080774) internal successors, (35896), 8171 states have internal predecessors, (35896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8172 states to 8172 states and 35896 transitions. [2021-06-05 05:16:38,704 INFO L78 Accepts]: Start accepts. Automaton has 8172 states and 35896 transitions. Word has length 33 [2021-06-05 05:16:38,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:38,704 INFO L482 AbstractCegarLoop]: Abstraction has 8172 states and 35896 transitions. [2021-06-05 05:16:38,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:38,704 INFO L276 IsEmpty]: Start isEmpty. Operand 8172 states and 35896 transitions. [2021-06-05 05:16:38,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:38,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:38,718 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, 1, 1, 1] [2021-06-05 05:16:38,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 05:16:38,918 INFO L430 AbstractCegarLoop]: === Iteration 196 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:38,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:38,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1714674670, now seen corresponding path program 115 times [2021-06-05 05:16:38,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:38,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410757626] [2021-06-05 05:16:38,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:39,142 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 05:16:39,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:39,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410757626] [2021-06-05 05:16:39,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410757626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:39,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535631580] [2021-06-05 05:16:39,143 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 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 05:16:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:39,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:16:39,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:39,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:39,325 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 28 treesize of output 12 [2021-06-05 05:16:39,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:39,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:39,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:39,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:16:39,409 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 05:16:39,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535631580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:39,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:39,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:16:39,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411949145] [2021-06-05 05:16:39,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:39,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:39,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:39,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:39,410 INFO L87 Difference]: Start difference. First operand 8172 states and 35896 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:40,014 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 05:16:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:41,844 INFO L93 Difference]: Finished difference Result 9840 states and 42118 transitions. [2021-06-05 05:16:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:16:41,845 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:16:41,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:41,866 INFO L225 Difference]: With dead ends: 9840 [2021-06-05 05:16:41,866 INFO L226 Difference]: Without dead ends: 9745 [2021-06-05 05:16:41,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 1969.9ms TimeCoverageRelationStatistics Valid=570, Invalid=3590, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:16:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9745 states. [2021-06-05 05:16:41,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9745 to 8071. [2021-06-05 05:16:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8071 states, 8070 states have (on average 4.395786864931846) internal successors, (35474), 8070 states have internal predecessors, (35474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:42,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8071 states to 8071 states and 35474 transitions. [2021-06-05 05:16:42,004 INFO L78 Accepts]: Start accepts. Automaton has 8071 states and 35474 transitions. Word has length 33 [2021-06-05 05:16:42,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:42,004 INFO L482 AbstractCegarLoop]: Abstraction has 8071 states and 35474 transitions. [2021-06-05 05:16:42,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:42,004 INFO L276 IsEmpty]: Start isEmpty. Operand 8071 states and 35474 transitions. [2021-06-05 05:16:42,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:42,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:42,017 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, 1, 1, 1] [2021-06-05 05:16:42,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:42,217 INFO L430 AbstractCegarLoop]: === Iteration 197 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:42,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:42,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1645714846, now seen corresponding path program 116 times [2021-06-05 05:16:42,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:42,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084749311] [2021-06-05 05:16:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:42,380 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 05:16:42,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:42,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084749311] [2021-06-05 05:16:42,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084749311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:42,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038439243] [2021-06-05 05:16:42,381 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 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 05:16:42,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:42,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:42,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:16:42,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:42,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:42,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-06-05 05:16:42,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:42,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:42,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:42,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-05 05:16:42,935 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 05:16:42,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038439243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:42,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:42,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:16:42,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578053007] [2021-06-05 05:16:42,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:16:42,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:42,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:16:42,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:16:42,936 INFO L87 Difference]: Start difference. First operand 8071 states and 35474 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:44,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:44,660 INFO L93 Difference]: Finished difference Result 9017 states and 39364 transitions. [2021-06-05 05:16:44,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:16:44,660 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:16:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:44,680 INFO L225 Difference]: With dead ends: 9017 [2021-06-05 05:16:44,680 INFO L226 Difference]: Without dead ends: 8966 [2021-06-05 05:16:44,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1430.5ms TimeCoverageRelationStatistics Valid=262, Invalid=1900, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:16:44,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8966 states. [2021-06-05 05:16:44,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8966 to 8053. [2021-06-05 05:16:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8053 states, 8052 states have (on average 4.3977893691008445) internal successors, (35411), 8052 states have internal predecessors, (35411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8053 states to 8053 states and 35411 transitions. [2021-06-05 05:16:44,807 INFO L78 Accepts]: Start accepts. Automaton has 8053 states and 35411 transitions. Word has length 33 [2021-06-05 05:16:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:44,807 INFO L482 AbstractCegarLoop]: Abstraction has 8053 states and 35411 transitions. [2021-06-05 05:16:44,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 8053 states and 35411 transitions. [2021-06-05 05:16:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:44,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:44,820 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, 1, 1, 1] [2021-06-05 05:16:45,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:45,021 INFO L430 AbstractCegarLoop]: === Iteration 198 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:45,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:45,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1608053292, now seen corresponding path program 117 times [2021-06-05 05:16:45,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:45,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814323129] [2021-06-05 05:16:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:45,193 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 05:16:45,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:45,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814323129] [2021-06-05 05:16:45,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814323129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:45,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144577712] [2021-06-05 05:16:45,193 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 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 05:16:45,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:16:45,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:45,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:16:45,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:45,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:45,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:16:45,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:45,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:45,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:45,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 05:16:45,562 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 05:16:45,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144577712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:45,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:45,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:16:45,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175946349] [2021-06-05 05:16:45,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:16:45,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:45,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:16:45,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:16:45,563 INFO L87 Difference]: Start difference. First operand 8053 states and 35411 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 05:16:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:47,081 INFO L93 Difference]: Finished difference Result 8755 states and 37999 transitions. [2021-06-05 05:16:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:16:47,081 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 05:16:47,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:47,101 INFO L225 Difference]: With dead ends: 8755 [2021-06-05 05:16:47,101 INFO L226 Difference]: Without dead ends: 8737 [2021-06-05 05:16:47,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1214.0ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:16:47,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8737 states. [2021-06-05 05:16:47,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8737 to 8046. [2021-06-05 05:16:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8046 states, 8045 states have (on average 4.399254195152269) internal successors, (35392), 8045 states have internal predecessors, (35392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:47,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8046 states to 8046 states and 35392 transitions. [2021-06-05 05:16:47,278 INFO L78 Accepts]: Start accepts. Automaton has 8046 states and 35392 transitions. Word has length 33 [2021-06-05 05:16:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:47,278 INFO L482 AbstractCegarLoop]: Abstraction has 8046 states and 35392 transitions. [2021-06-05 05:16:47,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 05:16:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 8046 states and 35392 transitions. [2021-06-05 05:16:47,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:47,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:47,291 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, 1, 1, 1] [2021-06-05 05:16:47,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 05:16:47,491 INFO L430 AbstractCegarLoop]: === Iteration 199 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:47,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:47,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1917882634, now seen corresponding path program 118 times [2021-06-05 05:16:47,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:47,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878789763] [2021-06-05 05:16:47,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:47,710 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 05:16:47,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:47,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878789763] [2021-06-05 05:16:47,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878789763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:47,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170113570] [2021-06-05 05:16:47,710 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 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 05:16:47,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:47,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:47,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:16:47,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:47,891 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 05:16:47,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:47,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:47,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:47,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:16:47,974 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 05:16:47,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170113570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:47,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:47,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:16:47,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425679526] [2021-06-05 05:16:47,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:47,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:47,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:47,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:47,975 INFO L87 Difference]: Start difference. First operand 8046 states and 35392 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:48,506 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 05:16:48,805 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 05:16:51,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:51,282 INFO L93 Difference]: Finished difference Result 9591 states and 41459 transitions. [2021-06-05 05:16:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:16:51,282 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:16:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:51,303 INFO L225 Difference]: With dead ends: 9591 [2021-06-05 05:16:51,304 INFO L226 Difference]: Without dead ends: 9559 [2021-06-05 05:16:51,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2786.8ms TimeCoverageRelationStatistics Valid=658, Invalid=4312, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:16:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9559 states. [2021-06-05 05:16:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9559 to 8046. [2021-06-05 05:16:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8046 states, 8045 states have (on average 4.399254195152269) internal successors, (35392), 8045 states have internal predecessors, (35392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:51,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8046 states to 8046 states and 35392 transitions. [2021-06-05 05:16:51,515 INFO L78 Accepts]: Start accepts. Automaton has 8046 states and 35392 transitions. Word has length 33 [2021-06-05 05:16:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:51,515 INFO L482 AbstractCegarLoop]: Abstraction has 8046 states and 35392 transitions. [2021-06-05 05:16:51,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 8046 states and 35392 transitions. [2021-06-05 05:16:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:51,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:51,527 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, 1, 1, 1] [2021-06-05 05:16:51,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 05:16:51,727 INFO L430 AbstractCegarLoop]: === Iteration 200 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:51,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:51,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1071907082, now seen corresponding path program 119 times [2021-06-05 05:16:51,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:51,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95646915] [2021-06-05 05:16:51,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:51,932 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 05:16:51,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:51,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95646915] [2021-06-05 05:16:51,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95646915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:51,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681707189] [2021-06-05 05:16:51,932 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 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 05:16:51,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:16:51,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:51,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:16:51,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:52,114 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 05:16:52,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:52,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:52,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:52,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:16:52,189 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 05:16:52,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681707189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:52,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:52,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:16:52,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654725504] [2021-06-05 05:16:52,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:52,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:52,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:52,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:52,190 INFO L87 Difference]: Start difference. First operand 8046 states and 35392 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:16:52,780 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-05 05:16:55,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:55,588 INFO L93 Difference]: Finished difference Result 10365 states and 43303 transitions. [2021-06-05 05:16:55,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:16:55,589 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:16:55,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:55,611 INFO L225 Difference]: With dead ends: 10365 [2021-06-05 05:16:55,611 INFO L226 Difference]: Without dead ends: 10235 [2021-06-05 05:16:55,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 2952.4ms TimeCoverageRelationStatistics Valid=666, Invalid=4164, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:16:55,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10235 states. [2021-06-05 05:16:55,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 7976. [2021-06-05 05:16:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7976 states, 7975 states have (on average 4.3993730407523515) internal successors, (35085), 7975 states have internal predecessors, (35085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7976 states to 7976 states and 35085 transitions. [2021-06-05 05:16:55,755 INFO L78 Accepts]: Start accepts. Automaton has 7976 states and 35085 transitions. Word has length 33 [2021-06-05 05:16:55,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:55,755 INFO L482 AbstractCegarLoop]: Abstraction has 7976 states and 35085 transitions. [2021-06-05 05:16:55,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:16:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 7976 states and 35085 transitions. [2021-06-05 05:16:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:55,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:55,768 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, 1, 1, 1] [2021-06-05 05:16:55,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 05:16:55,968 INFO L430 AbstractCegarLoop]: === Iteration 201 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:55,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:55,969 INFO L82 PathProgramCache]: Analyzing trace with hash 665446184, now seen corresponding path program 120 times [2021-06-05 05:16:55,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:55,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20007456] [2021-06-05 05:16:55,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:56,208 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 05:16:56,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:56,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20007456] [2021-06-05 05:16:56,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20007456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:56,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108749568] [2021-06-05 05:16:56,209 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 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 05:16:56,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:16:56,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:56,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:16:56,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:56,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:56,480 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:16:56,480 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 05:16:56,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:16:56,511 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-06-05 05:16:56,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:56,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 05:16:56,625 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 05:16:56,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108749568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:56,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:56,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:16:56,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162529532] [2021-06-05 05:16:56,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:16:56,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:56,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:16:56,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:16:56,626 INFO L87 Difference]: Start difference. First operand 7976 states and 35085 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:58,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:58,193 INFO L93 Difference]: Finished difference Result 8468 states and 36902 transitions. [2021-06-05 05:16:58,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:16:58,193 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:16:58,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:58,212 INFO L225 Difference]: With dead ends: 8468 [2021-06-05 05:16:58,212 INFO L226 Difference]: Without dead ends: 8417 [2021-06-05 05:16:58,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1342.2ms TimeCoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:16:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8417 states. [2021-06-05 05:16:58,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8417 to 7958. [2021-06-05 05:16:58,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7958 states, 7957 states have (on average 4.399019731054418) internal successors, (35003), 7957 states have internal predecessors, (35003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:58,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7958 states to 7958 states and 35003 transitions. [2021-06-05 05:16:58,340 INFO L78 Accepts]: Start accepts. Automaton has 7958 states and 35003 transitions. Word has length 33 [2021-06-05 05:16:58,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:58,340 INFO L482 AbstractCegarLoop]: Abstraction has 7958 states and 35003 transitions. [2021-06-05 05:16:58,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:58,341 INFO L276 IsEmpty]: Start isEmpty. Operand 7958 states and 35003 transitions. [2021-06-05 05:16:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:16:58,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:58,353 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, 1, 1, 1] [2021-06-05 05:16:58,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:58,554 INFO L430 AbstractCegarLoop]: === Iteration 202 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:58,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:58,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1926090286, now seen corresponding path program 121 times [2021-06-05 05:16:58,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:58,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839648949] [2021-06-05 05:16:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:58,725 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 05:16:58,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:58,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839648949] [2021-06-05 05:16:58,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839648949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:58,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834771619] [2021-06-05 05:16:58,726 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 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 05:16:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:58,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:16:58,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:58,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:58,931 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 28 treesize of output 12 [2021-06-05 05:16:58,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:58,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:58,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:58,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:16:59,012 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 05:16:59,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834771619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:59,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:59,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:16:59,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60827711] [2021-06-05 05:16:59,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:59,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:59,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:59,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:59,013 INFO L87 Difference]: Start difference. First operand 7958 states and 35003 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:00,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:00,464 INFO L93 Difference]: Finished difference Result 8499 states and 37144 transitions. [2021-06-05 05:17:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:17:00,464 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:00,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:00,550 INFO L225 Difference]: With dead ends: 8499 [2021-06-05 05:17:00,550 INFO L226 Difference]: Without dead ends: 8446 [2021-06-05 05:17:00,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1233.0ms TimeCoverageRelationStatistics Valid=236, Invalid=1744, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:17:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2021-06-05 05:17:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 7944. [2021-06-05 05:17:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7944 states, 7943 states have (on average 4.401107893742918) internal successors, (34958), 7943 states have internal predecessors, (34958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7944 states to 7944 states and 34958 transitions. [2021-06-05 05:17:00,666 INFO L78 Accepts]: Start accepts. Automaton has 7944 states and 34958 transitions. Word has length 33 [2021-06-05 05:17:00,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:00,667 INFO L482 AbstractCegarLoop]: Abstraction has 7944 states and 34958 transitions. [2021-06-05 05:17:00,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:00,667 INFO L276 IsEmpty]: Start isEmpty. Operand 7944 states and 34958 transitions. [2021-06-05 05:17:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:00,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:00,679 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, 1, 1, 1] [2021-06-05 05:17:00,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:00,879 INFO L430 AbstractCegarLoop]: === Iteration 203 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:00,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:00,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1157717600, now seen corresponding path program 122 times [2021-06-05 05:17:00,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:00,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321165502] [2021-06-05 05:17:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:01,059 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 05:17:01,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:01,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321165502] [2021-06-05 05:17:01,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321165502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:01,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516259301] [2021-06-05 05:17:01,059 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 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 05:17:01,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:01,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:01,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:17:01,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:01,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:01,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:01,256 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 24 treesize of output 30 [2021-06-05 05:17:01,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:01,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:01,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:01,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 05:17:01,416 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 05:17:01,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516259301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:01,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:01,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:17:01,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432600431] [2021-06-05 05:17:01,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:17:01,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:01,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:17:01,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:17:01,417 INFO L87 Difference]: Start difference. First operand 7944 states and 34958 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:02,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:02,739 INFO L93 Difference]: Finished difference Result 8675 states and 37858 transitions. [2021-06-05 05:17:02,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:17:02,739 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:02,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:02,758 INFO L225 Difference]: With dead ends: 8675 [2021-06-05 05:17:02,758 INFO L226 Difference]: Without dead ends: 8656 [2021-06-05 05:17:02,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1008.5ms TimeCoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:17:02,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8656 states. [2021-06-05 05:17:02,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8656 to 8069. [2021-06-05 05:17:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8069 states, 8068 states have (on average 4.405428854734755) internal successors, (35543), 8068 states have internal predecessors, (35543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:02,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8069 states to 8069 states and 35543 transitions. [2021-06-05 05:17:02,888 INFO L78 Accepts]: Start accepts. Automaton has 8069 states and 35543 transitions. Word has length 33 [2021-06-05 05:17:02,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:02,888 INFO L482 AbstractCegarLoop]: Abstraction has 8069 states and 35543 transitions. [2021-06-05 05:17:02,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 8069 states and 35543 transitions. [2021-06-05 05:17:02,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:02,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:02,901 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, 1, 1, 1] [2021-06-05 05:17:03,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:03,101 INFO L430 AbstractCegarLoop]: === Iteration 204 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:03,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:03,101 INFO L82 PathProgramCache]: Analyzing trace with hash 145555006, now seen corresponding path program 123 times [2021-06-05 05:17:03,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:03,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345483012] [2021-06-05 05:17:03,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:03,276 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 05:17:03,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:03,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345483012] [2021-06-05 05:17:03,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345483012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:03,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054956606] [2021-06-05 05:17:03,276 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 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 05:17:03,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:17:03,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:03,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:03,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:03,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:03,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:03,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:03,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:03,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:03,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 05:17:03,659 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 05:17:03,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054956606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:03,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:03,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:17:03,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639782858] [2021-06-05 05:17:03,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:17:03,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:03,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:17:03,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:17:03,660 INFO L87 Difference]: Start difference. First operand 8069 states and 35543 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:05,035 INFO L93 Difference]: Finished difference Result 8675 states and 37818 transitions. [2021-06-05 05:17:05,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:17:05,036 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:05,055 INFO L225 Difference]: With dead ends: 8675 [2021-06-05 05:17:05,056 INFO L226 Difference]: Without dead ends: 8666 [2021-06-05 05:17:05,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1201.1ms TimeCoverageRelationStatistics Valid=297, Invalid=1425, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:17:05,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8666 states. [2021-06-05 05:17:05,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8666 to 8072. [2021-06-05 05:17:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 4.404410853673647) internal successors, (35548), 8071 states have internal predecessors, (35548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 35548 transitions. [2021-06-05 05:17:05,210 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 35548 transitions. Word has length 33 [2021-06-05 05:17:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:05,210 INFO L482 AbstractCegarLoop]: Abstraction has 8072 states and 35548 transitions. [2021-06-05 05:17:05,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 35548 transitions. [2021-06-05 05:17:05,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:05,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:05,223 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, 1, 1, 1] [2021-06-05 05:17:05,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:05,424 INFO L430 AbstractCegarLoop]: === Iteration 205 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:05,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:05,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1522838436, now seen corresponding path program 124 times [2021-06-05 05:17:05,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:05,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997303311] [2021-06-05 05:17:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:05,610 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 05:17:05,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:05,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997303311] [2021-06-05 05:17:05,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997303311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:05,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396391907] [2021-06-05 05:17:05,611 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 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 05:17:05,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:05,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:05,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:05,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:05,800 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 05:17:05,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:05,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:05,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:05,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:17:05,878 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 05:17:05,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396391907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:05,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:05,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:17:05,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684009704] [2021-06-05 05:17:05,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:05,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:05,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:05,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:05,878 INFO L87 Difference]: Start difference. First operand 8072 states and 35548 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:17:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:06,926 INFO L93 Difference]: Finished difference Result 8952 states and 38982 transitions. [2021-06-05 05:17:06,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:17:06,927 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:17:06,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:06,947 INFO L225 Difference]: With dead ends: 8952 [2021-06-05 05:17:06,947 INFO L226 Difference]: Without dead ends: 8938 [2021-06-05 05:17:06,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 811.0ms TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:17:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8938 states. [2021-06-05 05:17:07,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8938 to 8071. [2021-06-05 05:17:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8071 states, 8070 states have (on average 4.40458488228005) internal successors, (35545), 8070 states have internal predecessors, (35545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8071 states to 8071 states and 35545 transitions. [2021-06-05 05:17:07,088 INFO L78 Accepts]: Start accepts. Automaton has 8071 states and 35545 transitions. Word has length 33 [2021-06-05 05:17:07,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:07,088 INFO L482 AbstractCegarLoop]: Abstraction has 8071 states and 35545 transitions. [2021-06-05 05:17:07,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:17:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 8071 states and 35545 transitions. [2021-06-05 05:17:07,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:07,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:07,101 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, 1, 1, 1] [2021-06-05 05:17:07,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 05:17:07,302 INFO L430 AbstractCegarLoop]: === Iteration 206 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:07,302 INFO L82 PathProgramCache]: Analyzing trace with hash -753807066, now seen corresponding path program 125 times [2021-06-05 05:17:07,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:07,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316913963] [2021-06-05 05:17:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:07,479 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 05:17:07,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:07,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316913963] [2021-06-05 05:17:07,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316913963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:07,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659505591] [2021-06-05 05:17:07,479 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 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 05:17:07,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:17:07,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:07,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:07,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:07,667 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 05:17:07,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:07,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:07,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:07,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:17:07,752 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 05:17:07,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659505591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:07,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:07,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:17:07,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605893721] [2021-06-05 05:17:07,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:07,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:07,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:07,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:07,753 INFO L87 Difference]: Start difference. First operand 8071 states and 35545 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:09,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:09,526 INFO L93 Difference]: Finished difference Result 9264 states and 40322 transitions. [2021-06-05 05:17:09,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:17:09,527 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:09,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:09,546 INFO L225 Difference]: With dead ends: 9264 [2021-06-05 05:17:09,547 INFO L226 Difference]: Without dead ends: 9236 [2021-06-05 05:17:09,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1458.1ms TimeCoverageRelationStatistics Valid=343, Invalid=2309, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:17:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9236 states. [2021-06-05 05:17:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9236 to 8034. [2021-06-05 05:17:09,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8034 states, 8033 states have (on average 4.406199427362131) internal successors, (35395), 8033 states have internal predecessors, (35395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:09,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8034 states to 8034 states and 35395 transitions. [2021-06-05 05:17:09,696 INFO L78 Accepts]: Start accepts. Automaton has 8034 states and 35395 transitions. Word has length 33 [2021-06-05 05:17:09,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:09,697 INFO L482 AbstractCegarLoop]: Abstraction has 8034 states and 35395 transitions. [2021-06-05 05:17:09,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:09,697 INFO L276 IsEmpty]: Start isEmpty. Operand 8034 states and 35395 transitions. [2021-06-05 05:17:09,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:09,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:09,711 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, 1, 1, 1] [2021-06-05 05:17:09,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 05:17:09,912 INFO L430 AbstractCegarLoop]: === Iteration 207 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:09,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:09,912 INFO L82 PathProgramCache]: Analyzing trace with hash -2139969714, now seen corresponding path program 126 times [2021-06-05 05:17:09,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:09,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232958339] [2021-06-05 05:17:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:10,085 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 05:17:10,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:10,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232958339] [2021-06-05 05:17:10,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232958339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:10,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215242106] [2021-06-05 05:17:10,086 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 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 05:17:10,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:17:10,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:10,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:10,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:10,346 INFO L354 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2021-06-05 05:17:10,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 65 [2021-06-05 05:17:10,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:10,426 INFO L628 ElimStorePlain]: treesize reduction 38, result has 63.5 percent of original size [2021-06-05 05:17:10,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:10,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:66 [2021-06-05 05:17:10,652 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 05:17:10,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215242106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:10,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:10,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:17:10,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418801853] [2021-06-05 05:17:10,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:17:10,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:10,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:17:10,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:17:10,653 INFO L87 Difference]: Start difference. First operand 8034 states and 35395 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:12,496 INFO L93 Difference]: Finished difference Result 8486 states and 37152 transitions. [2021-06-05 05:17:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:17:12,496 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:12,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:12,515 INFO L225 Difference]: With dead ends: 8486 [2021-06-05 05:17:12,515 INFO L226 Difference]: Without dead ends: 8471 [2021-06-05 05:17:12,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1535.2ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:17:12,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8471 states. [2021-06-05 05:17:12,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8471 to 8022. [2021-06-05 05:17:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8021 states have (on average 4.407056476748535) internal successors, (35349), 8021 states have internal predecessors, (35349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 35349 transitions. [2021-06-05 05:17:12,741 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 35349 transitions. Word has length 33 [2021-06-05 05:17:12,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:12,741 INFO L482 AbstractCegarLoop]: Abstraction has 8022 states and 35349 transitions. [2021-06-05 05:17:12,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:12,742 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 35349 transitions. [2021-06-05 05:17:12,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:12,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:12,756 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, 1, 1, 1] [2021-06-05 05:17:12,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:12,956 INFO L430 AbstractCegarLoop]: === Iteration 208 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:12,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:12,956 INFO L82 PathProgramCache]: Analyzing trace with hash -64513948, now seen corresponding path program 127 times [2021-06-05 05:17:12,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:12,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217044412] [2021-06-05 05:17:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:13,133 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 05:17:13,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:13,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217044412] [2021-06-05 05:17:13,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217044412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:13,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753829342] [2021-06-05 05:17:13,133 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 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 05:17:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:13,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:13,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:13,364 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 05:17:13,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:13,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:13,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:13,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:17:13,436 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 05:17:13,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753829342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:13,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:13,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:17:13,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397181998] [2021-06-05 05:17:13,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:13,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:13,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:13,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:13,437 INFO L87 Difference]: Start difference. First operand 8022 states and 35349 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:14,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:14,851 INFO L93 Difference]: Finished difference Result 8656 states and 37855 transitions. [2021-06-05 05:17:14,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:17:14,852 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:14,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:14,871 INFO L225 Difference]: With dead ends: 8656 [2021-06-05 05:17:14,871 INFO L226 Difference]: Without dead ends: 8641 [2021-06-05 05:17:14,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1023.9ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:17:14,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8641 states. [2021-06-05 05:17:14,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8641 to 8022. [2021-06-05 05:17:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8021 states have (on average 4.407056476748535) internal successors, (35349), 8021 states have internal predecessors, (35349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 35349 transitions. [2021-06-05 05:17:15,001 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 35349 transitions. Word has length 33 [2021-06-05 05:17:15,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:15,002 INFO L482 AbstractCegarLoop]: Abstraction has 8022 states and 35349 transitions. [2021-06-05 05:17:15,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:15,002 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 35349 transitions. [2021-06-05 05:17:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:15,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:15,017 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, 1, 1, 1] [2021-06-05 05:17:15,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:15,222 INFO L430 AbstractCegarLoop]: === Iteration 209 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:15,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:15,222 INFO L82 PathProgramCache]: Analyzing trace with hash 369515398, now seen corresponding path program 128 times [2021-06-05 05:17:15,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:15,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476314467] [2021-06-05 05:17:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:15,424 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 05:17:15,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:15,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476314467] [2021-06-05 05:17:15,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476314467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:15,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175968709] [2021-06-05 05:17:15,424 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 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 05:17:15,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:15,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:15,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:17:15,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:15,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:15,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:15,690 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 24 treesize of output 30 [2021-06-05 05:17:15,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:15,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:15,707 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 05:17:15,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:54 [2021-06-05 05:17:15,941 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 05:17:15,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175968709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:15,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:15,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:17:15,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810470274] [2021-06-05 05:17:15,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:17:15,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:15,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:17:15,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:17:15,942 INFO L87 Difference]: Start difference. First operand 8022 states and 35349 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:16,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:16,871 INFO L93 Difference]: Finished difference Result 8467 states and 37017 transitions. [2021-06-05 05:17:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:17:16,872 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:16,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:16,897 INFO L225 Difference]: With dead ends: 8467 [2021-06-05 05:17:16,897 INFO L226 Difference]: Without dead ends: 8452 [2021-06-05 05:17:16,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 916.9ms TimeCoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:17:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2021-06-05 05:17:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8010. [2021-06-05 05:17:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8010 states, 8009 states have (on average 4.40704207766263) internal successors, (35296), 8009 states have internal predecessors, (35296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8010 states to 8010 states and 35296 transitions. [2021-06-05 05:17:17,144 INFO L78 Accepts]: Start accepts. Automaton has 8010 states and 35296 transitions. Word has length 33 [2021-06-05 05:17:17,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:17,144 INFO L482 AbstractCegarLoop]: Abstraction has 8010 states and 35296 transitions. [2021-06-05 05:17:17,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:17,144 INFO L276 IsEmpty]: Start isEmpty. Operand 8010 states and 35296 transitions. [2021-06-05 05:17:17,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:17,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:17,157 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, 1, 1, 1] [2021-06-05 05:17:17,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:17,358 INFO L430 AbstractCegarLoop]: === Iteration 210 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:17,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1374121620, now seen corresponding path program 129 times [2021-06-05 05:17:17,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:17,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437618546] [2021-06-05 05:17:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:17,581 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 05:17:17,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:17,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437618546] [2021-06-05 05:17:17,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437618546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:17,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401264035] [2021-06-05 05:17:17,582 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 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 05:17:17,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:17:17,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:17,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:17:17,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:17,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:17,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:17,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:17,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:17,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:17,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:17:17,972 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 05:17:17,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401264035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:17,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:17,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:17:17,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475260504] [2021-06-05 05:17:17,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:17:17,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:17,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:17:17,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:17:17,973 INFO L87 Difference]: Start difference. First operand 8010 states and 35296 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:18,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:18,788 INFO L93 Difference]: Finished difference Result 8275 states and 36314 transitions. [2021-06-05 05:17:18,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:17:18,789 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:18,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:18,807 INFO L225 Difference]: With dead ends: 8275 [2021-06-05 05:17:18,807 INFO L226 Difference]: Without dead ends: 8260 [2021-06-05 05:17:18,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 644.1ms TimeCoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:17:18,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2021-06-05 05:17:18,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 8012. [2021-06-05 05:17:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8012 states, 8011 states have (on average 4.406815628510798) internal successors, (35303), 8011 states have internal predecessors, (35303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8012 states to 8012 states and 35303 transitions. [2021-06-05 05:17:18,931 INFO L78 Accepts]: Start accepts. Automaton has 8012 states and 35303 transitions. Word has length 33 [2021-06-05 05:17:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:18,931 INFO L482 AbstractCegarLoop]: Abstraction has 8012 states and 35303 transitions. [2021-06-05 05:17:18,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 8012 states and 35303 transitions. [2021-06-05 05:17:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:18,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:18,944 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, 1, 1, 1] [2021-06-05 05:17:19,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 05:17:19,144 INFO L430 AbstractCegarLoop]: === Iteration 211 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:19,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:19,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1004725780, now seen corresponding path program 130 times [2021-06-05 05:17:19,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:19,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546012749] [2021-06-05 05:17:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:19,336 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 05:17:19,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:19,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546012749] [2021-06-05 05:17:19,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546012749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:19,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400424591] [2021-06-05 05:17:19,336 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 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 05:17:19,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:19,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:19,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:19,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:19,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:19,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-05 05:17:19,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:19,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:19,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:19,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:17:19,643 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 05:17:19,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400424591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:19,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:19,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:17:19,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346907192] [2021-06-05 05:17:19,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:19,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:19,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:19,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:19,643 INFO L87 Difference]: Start difference. First operand 8012 states and 35303 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:21,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:21,096 INFO L93 Difference]: Finished difference Result 8665 states and 37936 transitions. [2021-06-05 05:17:21,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:17:21,096 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:21,115 INFO L225 Difference]: With dead ends: 8665 [2021-06-05 05:17:21,116 INFO L226 Difference]: Without dead ends: 8650 [2021-06-05 05:17:21,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1124.6ms TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:17:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8650 states. [2021-06-05 05:17:21,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8650 to 8004. [2021-06-05 05:17:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8004 states, 8003 states have (on average 4.407847057353492) internal successors, (35276), 8003 states have internal predecessors, (35276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8004 states to 8004 states and 35276 transitions. [2021-06-05 05:17:21,315 INFO L78 Accepts]: Start accepts. Automaton has 8004 states and 35276 transitions. Word has length 33 [2021-06-05 05:17:21,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:21,315 INFO L482 AbstractCegarLoop]: Abstraction has 8004 states and 35276 transitions. [2021-06-05 05:17:21,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:21,316 INFO L276 IsEmpty]: Start isEmpty. Operand 8004 states and 35276 transitions. [2021-06-05 05:17:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:21,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:21,328 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, 1, 1, 1] [2021-06-05 05:17:21,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 05:17:21,528 INFO L430 AbstractCegarLoop]: === Iteration 212 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:21,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1237842204, now seen corresponding path program 131 times [2021-06-05 05:17:21,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:21,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719431766] [2021-06-05 05:17:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:21,710 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 05:17:21,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:21,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719431766] [2021-06-05 05:17:21,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719431766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:21,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534440534] [2021-06-05 05:17:21,710 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 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 05:17:21,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:17:21,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:21,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:21,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:21,902 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 05:17:21,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:21,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:21,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:21,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:17:21,980 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 05:17:21,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534440534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:21,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:21,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:17:21,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236829510] [2021-06-05 05:17:21,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:21,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:21,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:21,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:21,980 INFO L87 Difference]: Start difference. First operand 8004 states and 35276 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:23,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:23,693 INFO L93 Difference]: Finished difference Result 9983 states and 43185 transitions. [2021-06-05 05:17:23,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:17:23,693 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:23,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:23,715 INFO L225 Difference]: With dead ends: 9983 [2021-06-05 05:17:23,715 INFO L226 Difference]: Without dead ends: 9945 [2021-06-05 05:17:23,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1261.0ms TimeCoverageRelationStatistics Valid=405, Invalid=2351, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:17:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9945 states. [2021-06-05 05:17:23,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9945 to 8232. [2021-06-05 05:17:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8232 states, 8231 states have (on average 4.419147126716074) internal successors, (36374), 8231 states have internal predecessors, (36374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8232 states to 8232 states and 36374 transitions. [2021-06-05 05:17:23,887 INFO L78 Accepts]: Start accepts. Automaton has 8232 states and 36374 transitions. Word has length 33 [2021-06-05 05:17:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:23,887 INFO L482 AbstractCegarLoop]: Abstraction has 8232 states and 36374 transitions. [2021-06-05 05:17:23,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 8232 states and 36374 transitions. [2021-06-05 05:17:23,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:23,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:23,900 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, 1, 1, 1] [2021-06-05 05:17:24,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:24,101 INFO L430 AbstractCegarLoop]: === Iteration 213 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:24,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:24,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1753852486, now seen corresponding path program 132 times [2021-06-05 05:17:24,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:24,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508829146] [2021-06-05 05:17:24,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:24,275 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 05:17:24,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:24,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508829146] [2021-06-05 05:17:24,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508829146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:24,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162182492] [2021-06-05 05:17:24,276 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 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 05:17:24,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:17:24,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:24,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:24,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:24,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:24,511 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:17:24,511 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 27 treesize of output 55 [2021-06-05 05:17:24,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:17:24,534 INFO L628 ElimStorePlain]: treesize reduction 43, result has 33.8 percent of original size [2021-06-05 05:17:24,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:24,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 05:17:24,671 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 05:17:24,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162182492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:24,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:24,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:17:24,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203902426] [2021-06-05 05:17:24,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:17:24,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:24,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:17:24,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:17:24,672 INFO L87 Difference]: Start difference. First operand 8232 states and 36374 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:26,503 INFO L93 Difference]: Finished difference Result 9607 states and 41637 transitions. [2021-06-05 05:17:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:17:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:26,524 INFO L225 Difference]: With dead ends: 9607 [2021-06-05 05:17:26,524 INFO L226 Difference]: Without dead ends: 9585 [2021-06-05 05:17:26,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1301.5ms TimeCoverageRelationStatistics Valid=396, Invalid=2910, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:17:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9585 states. [2021-06-05 05:17:26,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9585 to 8427. [2021-06-05 05:17:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8427 states, 8426 states have (on average 4.421552338001424) internal successors, (37256), 8426 states have internal predecessors, (37256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:26,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8427 states to 8427 states and 37256 transitions. [2021-06-05 05:17:26,673 INFO L78 Accepts]: Start accepts. Automaton has 8427 states and 37256 transitions. Word has length 33 [2021-06-05 05:17:26,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:26,673 INFO L482 AbstractCegarLoop]: Abstraction has 8427 states and 37256 transitions. [2021-06-05 05:17:26,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:26,673 INFO L276 IsEmpty]: Start isEmpty. Operand 8427 states and 37256 transitions. [2021-06-05 05:17:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:26,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:26,686 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, 1, 1, 1] [2021-06-05 05:17:26,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:26,887 INFO L430 AbstractCegarLoop]: === Iteration 214 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:26,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:26,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1641752738, now seen corresponding path program 133 times [2021-06-05 05:17:26,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:26,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716407206] [2021-06-05 05:17:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:27,064 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 05:17:27,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:27,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716407206] [2021-06-05 05:17:27,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716407206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:27,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730680302] [2021-06-05 05:17:27,064 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 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 05:17:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:27,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:27,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:27,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:27,258 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 28 treesize of output 12 [2021-06-05 05:17:27,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:27,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:27,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:27,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:17:27,340 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 05:17:27,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730680302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:27,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:27,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:17:27,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066591777] [2021-06-05 05:17:27,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:27,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:27,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:27,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:27,341 INFO L87 Difference]: Start difference. First operand 8427 states and 37256 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:29,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:29,218 INFO L93 Difference]: Finished difference Result 10263 states and 44331 transitions. [2021-06-05 05:17:29,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:17:29,218 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:29,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:29,241 INFO L225 Difference]: With dead ends: 10263 [2021-06-05 05:17:29,241 INFO L226 Difference]: Without dead ends: 10220 [2021-06-05 05:17:29,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1538.9ms TimeCoverageRelationStatistics Valid=479, Invalid=3181, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:17:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10220 states. [2021-06-05 05:17:29,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10220 to 8360. [2021-06-05 05:17:29,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8360 states, 8359 states have (on average 4.426606053355664) internal successors, (37002), 8359 states have internal predecessors, (37002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8360 states to 8360 states and 37002 transitions. [2021-06-05 05:17:29,399 INFO L78 Accepts]: Start accepts. Automaton has 8360 states and 37002 transitions. Word has length 33 [2021-06-05 05:17:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:29,399 INFO L482 AbstractCegarLoop]: Abstraction has 8360 states and 37002 transitions. [2021-06-05 05:17:29,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 8360 states and 37002 transitions. [2021-06-05 05:17:29,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:29,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:29,413 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, 1, 1, 1] [2021-06-05 05:17:29,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:29,613 INFO L430 AbstractCegarLoop]: === Iteration 215 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:29,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:29,613 INFO L82 PathProgramCache]: Analyzing trace with hash 255590090, now seen corresponding path program 134 times [2021-06-05 05:17:29,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:29,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577707500] [2021-06-05 05:17:29,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:29,872 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 05:17:29,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:29,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577707500] [2021-06-05 05:17:29,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577707500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:29,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096959144] [2021-06-05 05:17:29,872 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 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 05:17:29,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:29,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:29,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:17:29,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:30,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:30,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:30,081 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 26 treesize of output 32 [2021-06-05 05:17:30,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:30,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:30,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:30,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:39 [2021-06-05 05:17:30,271 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 05:17:30,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096959144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:30,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:30,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:17:30,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433831819] [2021-06-05 05:17:30,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:17:30,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:30,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:17:30,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:17:30,271 INFO L87 Difference]: Start difference. First operand 8360 states and 37002 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:32,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:32,472 INFO L93 Difference]: Finished difference Result 9468 states and 41516 transitions. [2021-06-05 05:17:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:17:32,472 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:32,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:32,494 INFO L225 Difference]: With dead ends: 9468 [2021-06-05 05:17:32,494 INFO L226 Difference]: Without dead ends: 9438 [2021-06-05 05:17:32,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1871.2ms TimeCoverageRelationStatistics Valid=467, Invalid=3315, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:17:32,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9438 states. [2021-06-05 05:17:32,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9438 to 8345. [2021-06-05 05:17:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8345 states, 8344 states have (on average 4.427852348993288) internal successors, (36946), 8344 states have internal predecessors, (36946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8345 states to 8345 states and 36946 transitions. [2021-06-05 05:17:32,635 INFO L78 Accepts]: Start accepts. Automaton has 8345 states and 36946 transitions. Word has length 33 [2021-06-05 05:17:32,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:32,635 INFO L482 AbstractCegarLoop]: Abstraction has 8345 states and 36946 transitions. [2021-06-05 05:17:32,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:32,635 INFO L276 IsEmpty]: Start isEmpty. Operand 8345 states and 36946 transitions. [2021-06-05 05:17:32,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:32,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:32,648 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, 1, 1, 1] [2021-06-05 05:17:32,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:32,849 INFO L430 AbstractCegarLoop]: === Iteration 216 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:32,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1963921440, now seen corresponding path program 135 times [2021-06-05 05:17:32,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:32,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093858006] [2021-06-05 05:17:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:33,045 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 05:17:33,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:33,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093858006] [2021-06-05 05:17:33,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093858006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:33,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329500787] [2021-06-05 05:17:33,045 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 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 05:17:33,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:17:33,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:33,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:33,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:33,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:33,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:17:33,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:33,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:33,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:33,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:17:33,427 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 05:17:33,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329500787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:33,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:33,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:17:33,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279010754] [2021-06-05 05:17:33,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:17:33,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:33,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:17:33,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:17:33,428 INFO L87 Difference]: Start difference. First operand 8345 states and 36946 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:34,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:34,349 INFO L93 Difference]: Finished difference Result 8869 states and 39026 transitions. [2021-06-05 05:17:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:17:34,349 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:34,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:34,369 INFO L225 Difference]: With dead ends: 8869 [2021-06-05 05:17:34,369 INFO L226 Difference]: Without dead ends: 8854 [2021-06-05 05:17:34,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 710.1ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:17:34,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8854 states. [2021-06-05 05:17:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8854 to 8333. [2021-06-05 05:17:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8333 states, 8332 states have (on average 4.427868458953433) internal successors, (36893), 8332 states have internal predecessors, (36893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8333 states to 8333 states and 36893 transitions. [2021-06-05 05:17:34,505 INFO L78 Accepts]: Start accepts. Automaton has 8333 states and 36893 transitions. Word has length 33 [2021-06-05 05:17:34,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:34,505 INFO L482 AbstractCegarLoop]: Abstraction has 8333 states and 36893 transitions. [2021-06-05 05:17:34,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:34,505 INFO L276 IsEmpty]: Start isEmpty. Operand 8333 states and 36893 transitions. [2021-06-05 05:17:34,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:34,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:34,521 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, 1, 1, 1] [2021-06-05 05:17:34,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 05:17:34,721 INFO L430 AbstractCegarLoop]: === Iteration 217 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:34,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1107837472, now seen corresponding path program 136 times [2021-06-05 05:17:34,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:34,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249818983] [2021-06-05 05:17:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:34,912 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 05:17:34,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:34,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249818983] [2021-06-05 05:17:34,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249818983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:34,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960480068] [2021-06-05 05:17:34,912 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 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 05:17:34,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:34,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:34,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:34,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:35,073 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 05:17:35,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:35,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:35,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:35,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 05:17:35,167 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 05:17:35,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960480068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:35,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:35,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:17:35,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038790843] [2021-06-05 05:17:35,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:35,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:35,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:35,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:35,168 INFO L87 Difference]: Start difference. First operand 8333 states and 36893 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:36,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:36,799 INFO L93 Difference]: Finished difference Result 9800 states and 42777 transitions. [2021-06-05 05:17:36,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:17:36,800 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:36,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:36,822 INFO L225 Difference]: With dead ends: 9800 [2021-06-05 05:17:36,822 INFO L226 Difference]: Without dead ends: 9762 [2021-06-05 05:17:36,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1330.7ms TimeCoverageRelationStatistics Valid=457, Invalid=2405, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:17:36,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9762 states. [2021-06-05 05:17:36,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9762 to 8549. [2021-06-05 05:17:36,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8549 states, 8548 states have (on average 4.43238184370613) internal successors, (37888), 8548 states have internal predecessors, (37888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8549 states to 8549 states and 37888 transitions. [2021-06-05 05:17:36,975 INFO L78 Accepts]: Start accepts. Automaton has 8549 states and 37888 transitions. Word has length 33 [2021-06-05 05:17:36,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:36,975 INFO L482 AbstractCegarLoop]: Abstraction has 8549 states and 37888 transitions. [2021-06-05 05:17:36,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:36,976 INFO L276 IsEmpty]: Start isEmpty. Operand 8549 states and 37888 transitions. [2021-06-05 05:17:36,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:36,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:36,989 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, 1, 1, 1] [2021-06-05 05:17:37,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 05:17:37,190 INFO L430 AbstractCegarLoop]: === Iteration 218 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:37,190 INFO L82 PathProgramCache]: Analyzing trace with hash 195435134, now seen corresponding path program 137 times [2021-06-05 05:17:37,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:37,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427217309] [2021-06-05 05:17:37,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:37,422 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 05:17:37,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:37,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427217309] [2021-06-05 05:17:37,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427217309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:37,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148048901] [2021-06-05 05:17:37,422 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 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 05:17:37,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:17:37,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:37,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:37,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:37,612 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 05:17:37,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:37,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:37,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:37,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 05:17:37,711 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 05:17:37,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148048901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:37,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:37,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:17:37,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453752847] [2021-06-05 05:17:37,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:37,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:37,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:37,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:37,712 INFO L87 Difference]: Start difference. First operand 8549 states and 37888 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:39,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:39,022 INFO L93 Difference]: Finished difference Result 9578 states and 41726 transitions. [2021-06-05 05:17:39,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:17:39,022 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:39,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:39,043 INFO L225 Difference]: With dead ends: 9578 [2021-06-05 05:17:39,044 INFO L226 Difference]: Without dead ends: 9538 [2021-06-05 05:17:39,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1043.1ms TimeCoverageRelationStatistics Valid=371, Invalid=1791, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:17:39,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9538 states. [2021-06-05 05:17:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9538 to 8512. [2021-06-05 05:17:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8512 states, 8511 states have (on average 4.433674068852074) internal successors, (37735), 8511 states have internal predecessors, (37735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8512 states to 8512 states and 37735 transitions. [2021-06-05 05:17:39,192 INFO L78 Accepts]: Start accepts. Automaton has 8512 states and 37735 transitions. Word has length 33 [2021-06-05 05:17:39,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:39,192 INFO L482 AbstractCegarLoop]: Abstraction has 8512 states and 37735 transitions. [2021-06-05 05:17:39,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 8512 states and 37735 transitions. [2021-06-05 05:17:39,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:39,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:39,206 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, 1, 1, 1] [2021-06-05 05:17:39,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 05:17:39,407 INFO L430 AbstractCegarLoop]: === Iteration 219 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:39,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:39,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2090089586, now seen corresponding path program 138 times [2021-06-05 05:17:39,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:39,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143298892] [2021-06-05 05:17:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:39,584 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 05:17:39,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:39,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143298892] [2021-06-05 05:17:39,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143298892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:39,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117067495] [2021-06-05 05:17:39,584 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 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 05:17:39,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:17:39,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:39,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:39,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:39,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:39,800 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:17:39,801 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 29 treesize of output 57 [2021-06-05 05:17:39,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:39,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:39,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:39,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 05:17:40,014 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 05:17:40,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117067495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:40,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:40,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:17:40,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147614448] [2021-06-05 05:17:40,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:17:40,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:40,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:17:40,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:17:40,015 INFO L87 Difference]: Start difference. First operand 8512 states and 37735 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:41,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:41,846 INFO L93 Difference]: Finished difference Result 9072 states and 39928 transitions. [2021-06-05 05:17:41,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:17:41,847 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:41,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:41,867 INFO L225 Difference]: With dead ends: 9072 [2021-06-05 05:17:41,867 INFO L226 Difference]: Without dead ends: 9028 [2021-06-05 05:17:41,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1393.5ms TimeCoverageRelationStatistics Valid=272, Invalid=2484, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:17:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9028 states. [2021-06-05 05:17:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9028 to 8530. [2021-06-05 05:17:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8530 states, 8529 states have (on average 4.434752022511431) internal successors, (37824), 8529 states have internal predecessors, (37824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8530 states to 8530 states and 37824 transitions. [2021-06-05 05:17:42,001 INFO L78 Accepts]: Start accepts. Automaton has 8530 states and 37824 transitions. Word has length 33 [2021-06-05 05:17:42,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:42,001 INFO L482 AbstractCegarLoop]: Abstraction has 8530 states and 37824 transitions. [2021-06-05 05:17:42,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 8530 states and 37824 transitions. [2021-06-05 05:17:42,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:42,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:42,015 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, 1, 1, 1] [2021-06-05 05:17:42,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 05:17:42,215 INFO L430 AbstractCegarLoop]: === Iteration 220 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:42,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:42,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1156105308, now seen corresponding path program 139 times [2021-06-05 05:17:42,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:42,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789702999] [2021-06-05 05:17:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:42,469 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 05:17:42,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:42,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789702999] [2021-06-05 05:17:42,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789702999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:42,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454514453] [2021-06-05 05:17:42,469 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 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 05:17:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:42,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:42,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:42,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:42,637 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 29 treesize of output 13 [2021-06-05 05:17:42,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:42,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:42,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:42,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:17:42,732 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 05:17:42,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454514453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:42,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:42,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:17:42,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184125081] [2021-06-05 05:17:42,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:42,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:42,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:42,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:42,733 INFO L87 Difference]: Start difference. First operand 8530 states and 37824 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:44,691 INFO L93 Difference]: Finished difference Result 10264 states and 44523 transitions. [2021-06-05 05:17:44,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:17:44,692 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:44,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:44,715 INFO L225 Difference]: With dead ends: 10264 [2021-06-05 05:17:44,715 INFO L226 Difference]: Without dead ends: 10226 [2021-06-05 05:17:44,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1602.5ms TimeCoverageRelationStatistics Valid=482, Invalid=2824, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:17:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10226 states. [2021-06-05 05:17:44,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10226 to 8691. [2021-06-05 05:17:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8691 states, 8690 states have (on average 4.438780207134638) internal successors, (38573), 8690 states have internal predecessors, (38573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8691 states to 8691 states and 38573 transitions. [2021-06-05 05:17:44,865 INFO L78 Accepts]: Start accepts. Automaton has 8691 states and 38573 transitions. Word has length 33 [2021-06-05 05:17:44,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:44,865 INFO L482 AbstractCegarLoop]: Abstraction has 8691 states and 38573 transitions. [2021-06-05 05:17:44,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:44,865 INFO L276 IsEmpty]: Start isEmpty. Operand 8691 states and 38573 transitions. [2021-06-05 05:17:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:44,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:44,879 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, 1, 1, 1] [2021-06-05 05:17:45,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:45,080 INFO L430 AbstractCegarLoop]: === Iteration 221 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:45,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:45,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1835589382, now seen corresponding path program 140 times [2021-06-05 05:17:45,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:45,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260698643] [2021-06-05 05:17:45,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:45,264 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 05:17:45,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:45,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260698643] [2021-06-05 05:17:45,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260698643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:45,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263316908] [2021-06-05 05:17:45,265 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 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 05:17:45,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:45,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:45,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:45,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:45,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:45,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:17:45,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:45,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:45,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:45,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:17:45,641 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 05:17:45,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263316908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:45,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:45,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:17:45,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437171335] [2021-06-05 05:17:45,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:17:45,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:45,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:17:45,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:17:45,642 INFO L87 Difference]: Start difference. First operand 8691 states and 38573 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:47,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:47,449 INFO L93 Difference]: Finished difference Result 9622 states and 42115 transitions. [2021-06-05 05:17:47,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:17:47,449 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:47,471 INFO L225 Difference]: With dead ends: 9622 [2021-06-05 05:17:47,471 INFO L226 Difference]: Without dead ends: 9609 [2021-06-05 05:17:47,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1514.3ms TimeCoverageRelationStatistics Valid=433, Invalid=1823, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:17:47,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9609 states. [2021-06-05 05:17:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9609 to 8712. [2021-06-05 05:17:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8712 states, 8711 states have (on average 4.439214785902881) internal successors, (38670), 8711 states have internal predecessors, (38670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8712 states to 8712 states and 38670 transitions. [2021-06-05 05:17:47,623 INFO L78 Accepts]: Start accepts. Automaton has 8712 states and 38670 transitions. Word has length 33 [2021-06-05 05:17:47,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:47,623 INFO L482 AbstractCegarLoop]: Abstraction has 8712 states and 38670 transitions. [2021-06-05 05:17:47,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 8712 states and 38670 transitions. [2021-06-05 05:17:47,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:47,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:47,637 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, 1, 1, 1] [2021-06-05 05:17:47,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-06-05 05:17:47,837 INFO L430 AbstractCegarLoop]: === Iteration 222 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:47,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:47,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1560015842, now seen corresponding path program 141 times [2021-06-05 05:17:47,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:47,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869621344] [2021-06-05 05:17:47,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:48,036 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 05:17:48,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:48,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869621344] [2021-06-05 05:17:48,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869621344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:48,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185843569] [2021-06-05 05:17:48,036 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 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 05:17:48,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:17:48,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:48,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:17:48,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:48,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:48,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:48,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:48,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:48,209 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 05:17:48,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:48,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:48,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:48,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-05 05:17:48,407 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 05:17:48,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185843569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:48,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:48,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:17:48,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190497567] [2021-06-05 05:17:48,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:17:48,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:48,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:17:48,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:17:48,408 INFO L87 Difference]: Start difference. First operand 8712 states and 38670 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:49,694 INFO L93 Difference]: Finished difference Result 9650 states and 42263 transitions. [2021-06-05 05:17:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:17:49,694 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:49,716 INFO L225 Difference]: With dead ends: 9650 [2021-06-05 05:17:49,716 INFO L226 Difference]: Without dead ends: 9620 [2021-06-05 05:17:49,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1129.1ms TimeCoverageRelationStatistics Valid=284, Invalid=1786, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:17:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9620 states. [2021-06-05 05:17:49,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9620 to 8716. [2021-06-05 05:17:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8716 states, 8715 states have (on average 4.439013195639702) internal successors, (38686), 8715 states have internal predecessors, (38686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8716 states to 8716 states and 38686 transitions. [2021-06-05 05:17:49,856 INFO L78 Accepts]: Start accepts. Automaton has 8716 states and 38686 transitions. Word has length 33 [2021-06-05 05:17:49,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:49,856 INFO L482 AbstractCegarLoop]: Abstraction has 8716 states and 38686 transitions. [2021-06-05 05:17:49,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 8716 states and 38686 transitions. [2021-06-05 05:17:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:49,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:49,870 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, 1, 1, 1] [2021-06-05 05:17:50,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:50,070 INFO L430 AbstractCegarLoop]: === Iteration 223 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:50,071 INFO L82 PathProgramCache]: Analyzing trace with hash -220582460, now seen corresponding path program 142 times [2021-06-05 05:17:50,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:50,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812725718] [2021-06-05 05:17:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:50,264 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 05:17:50,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:50,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812725718] [2021-06-05 05:17:50,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812725718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:50,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507357580] [2021-06-05 05:17:50,265 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 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 05:17:50,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:50,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:50,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:50,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:50,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:50,430 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 29 treesize of output 13 [2021-06-05 05:17:50,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:50,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:50,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:50,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:17:50,529 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 05:17:50,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507357580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:50,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:50,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:17:50,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724350306] [2021-06-05 05:17:50,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:50,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:50,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:50,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:50,530 INFO L87 Difference]: Start difference. First operand 8716 states and 38686 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:52,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:52,168 INFO L93 Difference]: Finished difference Result 10020 states and 43550 transitions. [2021-06-05 05:17:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:17:52,168 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:52,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:52,190 INFO L225 Difference]: With dead ends: 10020 [2021-06-05 05:17:52,190 INFO L226 Difference]: Without dead ends: 9986 [2021-06-05 05:17:52,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1234.5ms TimeCoverageRelationStatistics Valid=404, Invalid=2146, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:17:52,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9986 states. [2021-06-05 05:17:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9986 to 8725. [2021-06-05 05:17:52,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8725 states, 8724 states have (on average 4.441655204034847) internal successors, (38749), 8724 states have internal predecessors, (38749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:52,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8725 states to 8725 states and 38749 transitions. [2021-06-05 05:17:52,338 INFO L78 Accepts]: Start accepts. Automaton has 8725 states and 38749 transitions. Word has length 33 [2021-06-05 05:17:52,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:52,338 INFO L482 AbstractCegarLoop]: Abstraction has 8725 states and 38749 transitions. [2021-06-05 05:17:52,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:52,338 INFO L276 IsEmpty]: Start isEmpty. Operand 8725 states and 38749 transitions. [2021-06-05 05:17:52,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:52,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:52,352 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, 1, 1, 1] [2021-06-05 05:17:52,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:52,552 INFO L430 AbstractCegarLoop]: === Iteration 224 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:52,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:52,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1675337628, now seen corresponding path program 143 times [2021-06-05 05:17:52,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:52,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383937339] [2021-06-05 05:17:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:52,736 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 05:17:52,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:52,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383937339] [2021-06-05 05:17:52,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383937339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:52,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645567261] [2021-06-05 05:17:52,737 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 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 05:17:52,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:17:52,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:52,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:52,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:52,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:52,910 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 29 treesize of output 13 [2021-06-05 05:17:52,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:52,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:52,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:52,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:17:53,010 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 05:17:53,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645567261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:53,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:53,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:17:53,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349802145] [2021-06-05 05:17:53,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:53,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:53,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:53,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:53,011 INFO L87 Difference]: Start difference. First operand 8725 states and 38749 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:54,616 INFO L93 Difference]: Finished difference Result 9519 states and 41919 transitions. [2021-06-05 05:17:54,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:17:54,616 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:54,637 INFO L225 Difference]: With dead ends: 9519 [2021-06-05 05:17:54,637 INFO L226 Difference]: Without dead ends: 9491 [2021-06-05 05:17:54,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1270.3ms TimeCoverageRelationStatistics Valid=257, Invalid=1813, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:17:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2021-06-05 05:17:54,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 8713. [2021-06-05 05:17:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8713 states, 8712 states have (on average 4.4421487603305785) internal successors, (38700), 8712 states have internal predecessors, (38700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8713 states to 8713 states and 38700 transitions. [2021-06-05 05:17:54,845 INFO L78 Accepts]: Start accepts. Automaton has 8713 states and 38700 transitions. Word has length 33 [2021-06-05 05:17:54,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:54,845 INFO L482 AbstractCegarLoop]: Abstraction has 8713 states and 38700 transitions. [2021-06-05 05:17:54,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:54,845 INFO L276 IsEmpty]: Start isEmpty. Operand 8713 states and 38700 transitions. [2021-06-05 05:17:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:54,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:54,859 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, 1, 1, 1] [2021-06-05 05:17:55,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-05 05:17:55,060 INFO L430 AbstractCegarLoop]: === Iteration 225 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:55,060 INFO L82 PathProgramCache]: Analyzing trace with hash -60083088, now seen corresponding path program 144 times [2021-06-05 05:17:55,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:55,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237347120] [2021-06-05 05:17:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:55,223 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 05:17:55,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:55,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237347120] [2021-06-05 05:17:55,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237347120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:55,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069100164] [2021-06-05 05:17:55,223 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 05:17:55,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:17:55,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:55,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:55,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:55,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:55,448 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:17:55,448 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 27 treesize of output 55 [2021-06-05 05:17:55,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:17:55,476 INFO L628 ElimStorePlain]: treesize reduction 82, result has 22.6 percent of original size [2021-06-05 05:17:55,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:55,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:24 [2021-06-05 05:17:55,601 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 05:17:55,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069100164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:55,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:55,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:17:55,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674440384] [2021-06-05 05:17:55,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:17:55,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:55,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:17:55,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:17:55,602 INFO L87 Difference]: Start difference. First operand 8713 states and 38700 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:57,198 INFO L93 Difference]: Finished difference Result 9896 states and 43239 transitions. [2021-06-05 05:17:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:17:57,198 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:57,221 INFO L225 Difference]: With dead ends: 9896 [2021-06-05 05:17:57,221 INFO L226 Difference]: Without dead ends: 9882 [2021-06-05 05:17:57,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1143.2ms TimeCoverageRelationStatistics Valid=361, Invalid=2395, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:17:57,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9882 states. [2021-06-05 05:17:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9882 to 8822. [2021-06-05 05:17:57,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8822 states, 8821 states have (on average 4.44416732796735) internal successors, (39202), 8821 states have internal predecessors, (39202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8822 states to 8822 states and 39202 transitions. [2021-06-05 05:17:57,371 INFO L78 Accepts]: Start accepts. Automaton has 8822 states and 39202 transitions. Word has length 33 [2021-06-05 05:17:57,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:57,372 INFO L482 AbstractCegarLoop]: Abstraction has 8822 states and 39202 transitions. [2021-06-05 05:17:57,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:57,372 INFO L276 IsEmpty]: Start isEmpty. Operand 8822 states and 39202 transitions. [2021-06-05 05:17:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:57,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:57,386 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, 1, 1, 1] [2021-06-05 05:17:57,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 05:17:57,586 INFO L430 AbstractCegarLoop]: === Iteration 226 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:57,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:57,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1071650020, now seen corresponding path program 145 times [2021-06-05 05:17:57,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:57,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212352144] [2021-06-05 05:17:57,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:57,759 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 05:17:57,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:57,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212352144] [2021-06-05 05:17:57,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212352144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:57,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917085359] [2021-06-05 05:17:57,759 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 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 05:17:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:57,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:17:57,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:57,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:57,945 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 28 treesize of output 12 [2021-06-05 05:17:57,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:57,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:57,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:57,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:17:58,025 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 05:17:58,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917085359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:58,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:58,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:17:58,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206067295] [2021-06-05 05:17:58,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:58,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:58,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:58,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:58,026 INFO L87 Difference]: Start difference. First operand 8822 states and 39202 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:59,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:59,405 INFO L93 Difference]: Finished difference Result 10528 states and 45626 transitions. [2021-06-05 05:17:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:17:59,405 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:17:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:59,428 INFO L225 Difference]: With dead ends: 10528 [2021-06-05 05:17:59,428 INFO L226 Difference]: Without dead ends: 10504 [2021-06-05 05:17:59,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 850.2ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:17:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10504 states. [2021-06-05 05:17:59,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10504 to 8919. [2021-06-05 05:17:59,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8919 states, 8918 states have (on average 4.449876653958286) internal successors, (39684), 8918 states have internal predecessors, (39684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:59,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8919 states to 8919 states and 39684 transitions. [2021-06-05 05:17:59,602 INFO L78 Accepts]: Start accepts. Automaton has 8919 states and 39684 transitions. Word has length 33 [2021-06-05 05:17:59,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:59,602 INFO L482 AbstractCegarLoop]: Abstraction has 8919 states and 39684 transitions. [2021-06-05 05:17:59,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:59,603 INFO L276 IsEmpty]: Start isEmpty. Operand 8919 states and 39684 transitions. [2021-06-05 05:17:59,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:17:59,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:59,616 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, 1, 1, 1] [2021-06-05 05:17:59,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-05 05:17:59,817 INFO L430 AbstractCegarLoop]: === Iteration 227 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:59,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1554923834, now seen corresponding path program 146 times [2021-06-05 05:17:59,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:59,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582901141] [2021-06-05 05:17:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:59,986 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 05:17:59,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:59,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582901141] [2021-06-05 05:17:59,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582901141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:59,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393923447] [2021-06-05 05:17:59,987 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 05:18:00,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:00,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:00,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:18:00,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:00,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:00,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:18:00,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:00,167 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 22 treesize of output 30 [2021-06-05 05:18:00,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:00,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:00,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:00,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:32 [2021-06-05 05:18:00,308 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 05:18:00,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393923447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:00,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:00,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 05:18:00,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412735377] [2021-06-05 05:18:00,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:18:00,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:00,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:18:00,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:00,309 INFO L87 Difference]: Start difference. First operand 8919 states and 39684 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) 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 05:18:01,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:01,493 INFO L93 Difference]: Finished difference Result 9755 states and 42896 transitions. [2021-06-05 05:18:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:18:01,494 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 33 [2021-06-05 05:18:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:01,516 INFO L225 Difference]: With dead ends: 9755 [2021-06-05 05:18:01,516 INFO L226 Difference]: Without dead ends: 9732 [2021-06-05 05:18:01,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 931.0ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:18:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9732 states. [2021-06-05 05:18:01,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9732 to 8879. [2021-06-05 05:18:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8879 states, 8878 states have (on average 4.451903581887812) internal successors, (39524), 8878 states have internal predecessors, (39524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:01,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8879 states to 8879 states and 39524 transitions. [2021-06-05 05:18:01,665 INFO L78 Accepts]: Start accepts. Automaton has 8879 states and 39524 transitions. Word has length 33 [2021-06-05 05:18:01,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:01,665 INFO L482 AbstractCegarLoop]: Abstraction has 8879 states and 39524 transitions. [2021-06-05 05:18:01,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 05:18:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 8879 states and 39524 transitions. [2021-06-05 05:18:01,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:01,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:01,679 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, 1, 1, 1] [2021-06-05 05:18:01,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:01,880 INFO L430 AbstractCegarLoop]: === Iteration 228 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:01,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:01,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1407378432, now seen corresponding path program 147 times [2021-06-05 05:18:01,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:01,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794961459] [2021-06-05 05:18:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:02,089 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 05:18:02,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:02,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794961459] [2021-06-05 05:18:02,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794961459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:02,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336265873] [2021-06-05 05:18:02,089 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 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 05:18:02,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:18:02,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:02,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:18:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:02,287 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 05:18:02,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:02,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:02,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:02,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:18 [2021-06-05 05:18:02,405 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 05:18:02,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336265873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:02,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:02,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 05:18:02,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752899350] [2021-06-05 05:18:02,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:18:02,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:02,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:18:02,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:02,406 INFO L87 Difference]: Start difference. First operand 8879 states and 39524 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) 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 05:18:04,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:04,000 INFO L93 Difference]: Finished difference Result 10245 states and 44612 transitions. [2021-06-05 05:18:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:18:04,001 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 33 [2021-06-05 05:18:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:04,025 INFO L225 Difference]: With dead ends: 10245 [2021-06-05 05:18:04,025 INFO L226 Difference]: Without dead ends: 10186 [2021-06-05 05:18:04,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1179.9ms TimeCoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:18:04,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-06-05 05:18:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 8876. [2021-06-05 05:18:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8876 states, 8875 states have (on average 4.451943661971831) internal successors, (39511), 8875 states have internal predecessors, (39511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8876 states to 8876 states and 39511 transitions. [2021-06-05 05:18:04,192 INFO L78 Accepts]: Start accepts. Automaton has 8876 states and 39511 transitions. Word has length 33 [2021-06-05 05:18:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:04,192 INFO L482 AbstractCegarLoop]: Abstraction has 8876 states and 39511 transitions. [2021-06-05 05:18:04,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 05:18:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 8876 states and 39511 transitions. [2021-06-05 05:18:04,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:04,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:04,207 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, 1, 1, 1] [2021-06-05 05:18:04,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2021-06-05 05:18:04,407 INFO L430 AbstractCegarLoop]: === Iteration 229 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:04,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:04,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1832270746, now seen corresponding path program 148 times [2021-06-05 05:18:04,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:04,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822265924] [2021-06-05 05:18:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:04,585 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 05:18:04,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:04,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822265924] [2021-06-05 05:18:04,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822265924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:04,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807088798] [2021-06-05 05:18:04,586 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 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 05:18:04,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:04,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:04,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:04,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:04,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:04,802 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 28 treesize of output 12 [2021-06-05 05:18:04,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:04,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:04,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:04,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:18:04,883 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 05:18:04,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807088798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:04,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:04,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:18:04,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213082688] [2021-06-05 05:18:04,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:18:04,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:04,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:18:04,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:04,884 INFO L87 Difference]: Start difference. First operand 8876 states and 39511 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:06,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:06,389 INFO L93 Difference]: Finished difference Result 10460 states and 45732 transitions. [2021-06-05 05:18:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:18:06,389 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:18:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:06,412 INFO L225 Difference]: With dead ends: 10460 [2021-06-05 05:18:06,413 INFO L226 Difference]: Without dead ends: 10430 [2021-06-05 05:18:06,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1110.5ms TimeCoverageRelationStatistics Valid=271, Invalid=2179, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:18:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10430 states. [2021-06-05 05:18:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10430 to 8873. [2021-06-05 05:18:06,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8873 states, 8872 states have (on average 4.452547339945897) internal successors, (39503), 8872 states have internal predecessors, (39503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8873 states to 8873 states and 39503 transitions. [2021-06-05 05:18:06,575 INFO L78 Accepts]: Start accepts. Automaton has 8873 states and 39503 transitions. Word has length 33 [2021-06-05 05:18:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:06,575 INFO L482 AbstractCegarLoop]: Abstraction has 8873 states and 39503 transitions. [2021-06-05 05:18:06,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:06,575 INFO L276 IsEmpty]: Start isEmpty. Operand 8873 states and 39503 transitions. [2021-06-05 05:18:06,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:06,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:06,589 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, 1, 1, 1] [2021-06-05 05:18:06,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:06,789 INFO L430 AbstractCegarLoop]: === Iteration 230 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:06,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1889204532, now seen corresponding path program 149 times [2021-06-05 05:18:06,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:06,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209755831] [2021-06-05 05:18:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:06,971 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 05:18:06,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:06,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209755831] [2021-06-05 05:18:06,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209755831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:06,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372094718] [2021-06-05 05:18:06,971 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 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 05:18:07,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:18:07,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:07,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:07,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:07,203 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 05:18:07,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:07,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:07,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:07,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 05:18:07,293 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 05:18:07,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372094718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:07,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:07,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:18:07,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55914998] [2021-06-05 05:18:07,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:18:07,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:07,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:18:07,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:18:07,294 INFO L87 Difference]: Start difference. First operand 8873 states and 39503 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:18:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:08,246 INFO L93 Difference]: Finished difference Result 9991 states and 43743 transitions. [2021-06-05 05:18:08,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:18:08,247 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 05:18:08,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:08,269 INFO L225 Difference]: With dead ends: 9991 [2021-06-05 05:18:08,269 INFO L226 Difference]: Without dead ends: 9958 [2021-06-05 05:18:08,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 947.4ms TimeCoverageRelationStatistics Valid=333, Invalid=1389, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:18:08,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9958 states. [2021-06-05 05:18:08,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9958 to 8919. [2021-06-05 05:18:08,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8919 states, 8918 states have (on average 4.457501681991478) internal successors, (39752), 8918 states have internal predecessors, (39752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:08,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8919 states to 8919 states and 39752 transitions. [2021-06-05 05:18:08,423 INFO L78 Accepts]: Start accepts. Automaton has 8919 states and 39752 transitions. Word has length 33 [2021-06-05 05:18:08,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:08,423 INFO L482 AbstractCegarLoop]: Abstraction has 8919 states and 39752 transitions. [2021-06-05 05:18:08,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:18:08,423 INFO L276 IsEmpty]: Start isEmpty. Operand 8919 states and 39752 transitions. [2021-06-05 05:18:08,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:08,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:08,438 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, 1, 1, 1] [2021-06-05 05:18:08,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:08,638 INFO L430 AbstractCegarLoop]: === Iteration 231 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:08,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:08,638 INFO L82 PathProgramCache]: Analyzing trace with hash 918933764, now seen corresponding path program 150 times [2021-06-05 05:18:08,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:08,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932244247] [2021-06-05 05:18:08,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:08,817 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 05:18:08,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:08,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932244247] [2021-06-05 05:18:08,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932244247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:08,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703134622] [2021-06-05 05:18:08,817 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 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 05:18:08,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:18:08,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:08,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:18:08,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:08,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:09,021 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:18:09,021 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 29 treesize of output 57 [2021-06-05 05:18:09,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:09,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:09,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:09,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:59 [2021-06-05 05:18:09,263 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 05:18:09,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703134622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:09,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:09,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:18:09,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647115289] [2021-06-05 05:18:09,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:18:09,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:09,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:18:09,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:18:09,264 INFO L87 Difference]: Start difference. First operand 8919 states and 39752 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:10,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:10,977 INFO L93 Difference]: Finished difference Result 9626 states and 42490 transitions. [2021-06-05 05:18:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:18:10,977 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:18:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:10,999 INFO L225 Difference]: With dead ends: 9626 [2021-06-05 05:18:10,999 INFO L226 Difference]: Without dead ends: 9599 [2021-06-05 05:18:10,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1368.5ms TimeCoverageRelationStatistics Valid=287, Invalid=2263, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:18:11,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9599 states. [2021-06-05 05:18:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9599 to 8937. [2021-06-05 05:18:11,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8937 states, 8936 states have (on average 4.458818263205013) internal successors, (39844), 8936 states have internal predecessors, (39844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8937 states to 8937 states and 39844 transitions. [2021-06-05 05:18:11,204 INFO L78 Accepts]: Start accepts. Automaton has 8937 states and 39844 transitions. Word has length 33 [2021-06-05 05:18:11,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:11,204 INFO L482 AbstractCegarLoop]: Abstraction has 8937 states and 39844 transitions. [2021-06-05 05:18:11,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:11,205 INFO L276 IsEmpty]: Start isEmpty. Operand 8937 states and 39844 transitions. [2021-06-05 05:18:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:11,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:11,219 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, 1, 1, 1] [2021-06-05 05:18:11,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 05:18:11,419 INFO L430 AbstractCegarLoop]: === Iteration 232 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:11,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:11,420 INFO L82 PathProgramCache]: Analyzing trace with hash -141819984, now seen corresponding path program 151 times [2021-06-05 05:18:11,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:11,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5639267] [2021-06-05 05:18:11,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:11,588 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 05:18:11,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:11,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5639267] [2021-06-05 05:18:11,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5639267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:11,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696665263] [2021-06-05 05:18:11,588 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 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 05:18:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:11,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:11,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:11,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:11,745 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 29 treesize of output 13 [2021-06-05 05:18:11,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:11,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:11,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:11,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:18:11,836 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 05:18:11,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696665263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:11,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:11,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:18:11,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760843449] [2021-06-05 05:18:11,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:18:11,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:11,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:18:11,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:18:11,836 INFO L87 Difference]: Start difference. First operand 8937 states and 39844 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:18:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:13,024 INFO L93 Difference]: Finished difference Result 10354 states and 45076 transitions. [2021-06-05 05:18:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:18:13,025 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 05:18:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:13,047 INFO L225 Difference]: With dead ends: 10354 [2021-06-05 05:18:13,047 INFO L226 Difference]: Without dead ends: 10309 [2021-06-05 05:18:13,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 955.5ms TimeCoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:18:13,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10309 states. [2021-06-05 05:18:13,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10309 to 8936. [2021-06-05 05:18:13,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8936 states, 8935 states have (on average 4.462674874090655) internal successors, (39874), 8935 states have internal predecessors, (39874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8936 states to 8936 states and 39874 transitions. [2021-06-05 05:18:13,206 INFO L78 Accepts]: Start accepts. Automaton has 8936 states and 39874 transitions. Word has length 33 [2021-06-05 05:18:13,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:13,206 INFO L482 AbstractCegarLoop]: Abstraction has 8936 states and 39874 transitions. [2021-06-05 05:18:13,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:18:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand 8936 states and 39874 transitions. [2021-06-05 05:18:13,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:13,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:13,221 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, 1, 1, 1] [2021-06-05 05:18:13,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 05:18:13,430 INFO L430 AbstractCegarLoop]: === Iteration 233 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:13,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:13,430 INFO L82 PathProgramCache]: Analyzing trace with hash -192289258, now seen corresponding path program 152 times [2021-06-05 05:18:13,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:13,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134359685] [2021-06-05 05:18:13,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:13,599 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 05:18:13,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:13,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134359685] [2021-06-05 05:18:13,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134359685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:13,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316878949] [2021-06-05 05:18:13,600 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 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 05:18:13,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:13,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:13,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:13,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:13,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:13,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:13,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:13,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:13,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:18:13,958 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 05:18:13,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316878949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:13,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:13,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:18:13,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748884756] [2021-06-05 05:18:13,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:18:13,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:13,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:18:13,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:18:13,958 INFO L87 Difference]: Start difference. First operand 8936 states and 39874 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:15,370 INFO L93 Difference]: Finished difference Result 9546 states and 42305 transitions. [2021-06-05 05:18:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:18:15,371 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:18:15,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:15,392 INFO L225 Difference]: With dead ends: 9546 [2021-06-05 05:18:15,392 INFO L226 Difference]: Without dead ends: 9533 [2021-06-05 05:18:15,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1179.6ms TimeCoverageRelationStatistics Valid=311, Invalid=1581, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:18:15,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9533 states. [2021-06-05 05:18:15,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 8921. [2021-06-05 05:18:15,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8921 states, 8920 states have (on average 4.463565022421525) internal successors, (39815), 8920 states have internal predecessors, (39815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8921 states to 8921 states and 39815 transitions. [2021-06-05 05:18:15,534 INFO L78 Accepts]: Start accepts. Automaton has 8921 states and 39815 transitions. Word has length 33 [2021-06-05 05:18:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:15,535 INFO L482 AbstractCegarLoop]: Abstraction has 8921 states and 39815 transitions. [2021-06-05 05:18:15,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call 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 L276 IsEmpty]: Start isEmpty. Operand 8921 states and 39815 transitions. [2021-06-05 05:18:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:15,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:15,549 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, 1, 1, 1] [2021-06-05 05:18:15,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 05:18:15,750 INFO L430 AbstractCegarLoop]: === Iteration 234 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:15,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1573791708, now seen corresponding path program 153 times [2021-06-05 05:18:15,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:15,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448411122] [2021-06-05 05:18:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:15,912 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 05:18:15,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:15,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448411122] [2021-06-05 05:18:15,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448411122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:15,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747021935] [2021-06-05 05:18:15,912 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 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 05:18:15,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:18:15,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:15,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:15,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:16,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:16,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 05:18:16,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:16,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:16,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:16,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 05:18:16,291 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 05:18:16,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747021935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:16,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:16,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:18:16,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351831902] [2021-06-05 05:18:16,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:18:16,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:16,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:18:16,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:18:16,292 INFO L87 Difference]: Start difference. First operand 8921 states and 39815 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:17,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:17,958 INFO L93 Difference]: Finished difference Result 9494 states and 41998 transitions. [2021-06-05 05:18:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:18:17,959 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:18:17,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:17,980 INFO L225 Difference]: With dead ends: 9494 [2021-06-05 05:18:17,980 INFO L226 Difference]: Without dead ends: 9477 [2021-06-05 05:18:17,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1538.9ms TimeCoverageRelationStatistics Valid=422, Invalid=1834, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:18:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-06-05 05:18:18,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 8930. [2021-06-05 05:18:18,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8930 states, 8929 states have (on average 4.461641841191623) internal successors, (39838), 8929 states have internal predecessors, (39838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:18,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8930 states to 8930 states and 39838 transitions. [2021-06-05 05:18:18,126 INFO L78 Accepts]: Start accepts. Automaton has 8930 states and 39838 transitions. Word has length 33 [2021-06-05 05:18:18,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:18,126 INFO L482 AbstractCegarLoop]: Abstraction has 8930 states and 39838 transitions. [2021-06-05 05:18:18,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:18,126 INFO L276 IsEmpty]: Start isEmpty. Operand 8930 states and 39838 transitions. [2021-06-05 05:18:18,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:18,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:18,141 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, 1, 1, 1] [2021-06-05 05:18:18,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:18,345 INFO L430 AbstractCegarLoop]: === Iteration 235 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:18,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:18,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1520405188, now seen corresponding path program 154 times [2021-06-05 05:18:18,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:18,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553302511] [2021-06-05 05:18:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:18,608 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 05:18:18,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:18,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553302511] [2021-06-05 05:18:18,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553302511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:18,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810266948] [2021-06-05 05:18:18,608 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 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 05:18:18,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:18,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:18,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:18,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:18,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:18:18,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:18,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:18,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:18,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 05:18:18,871 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 05:18:18,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810266948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:18,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:18,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:18:18,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368822094] [2021-06-05 05:18:18,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:18,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:18,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:18,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:18,872 INFO L87 Difference]: Start difference. First operand 8930 states and 39838 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:18:21,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:21,221 INFO L93 Difference]: Finished difference Result 10827 states and 46571 transitions. [2021-06-05 05:18:21,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:18:21,221 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:18:21,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:21,246 INFO L225 Difference]: With dead ends: 10827 [2021-06-05 05:18:21,246 INFO L226 Difference]: Without dead ends: 10766 [2021-06-05 05:18:21,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 2106.3ms TimeCoverageRelationStatistics Valid=583, Invalid=2497, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:18:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10766 states. [2021-06-05 05:18:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10766 to 9008. [2021-06-05 05:18:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9008 states, 9007 states have (on average 4.469856778061508) internal successors, (40260), 9007 states have internal predecessors, (40260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:21,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9008 states to 9008 states and 40260 transitions. [2021-06-05 05:18:21,411 INFO L78 Accepts]: Start accepts. Automaton has 9008 states and 40260 transitions. Word has length 33 [2021-06-05 05:18:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:21,411 INFO L482 AbstractCegarLoop]: Abstraction has 9008 states and 40260 transitions. [2021-06-05 05:18:21,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:18:21,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9008 states and 40260 transitions. [2021-06-05 05:18:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:21,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:21,426 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, 1, 1, 1] [2021-06-05 05:18:21,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:21,626 INFO L430 AbstractCegarLoop]: === Iteration 236 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:21,627 INFO L82 PathProgramCache]: Analyzing trace with hash -711733012, now seen corresponding path program 155 times [2021-06-05 05:18:21,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:21,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717948171] [2021-06-05 05:18:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:21,868 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 05:18:21,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:21,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717948171] [2021-06-05 05:18:21,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717948171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:21,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123036691] [2021-06-05 05:18:21,869 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 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 05:18:21,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:18:21,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:21,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:21,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:22,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:22,031 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 29 treesize of output 13 [2021-06-05 05:18:22,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:22,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:22,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:22,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:18:22,127 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 05:18:22,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123036691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:22,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:22,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:18:22,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201433568] [2021-06-05 05:18:22,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:18:22,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:22,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:18:22,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:22,128 INFO L87 Difference]: Start difference. First operand 9008 states and 40260 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:23,134 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 05:18:25,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:25,283 INFO L93 Difference]: Finished difference Result 10559 states and 45889 transitions. [2021-06-05 05:18:25,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:18:25,284 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:18:25,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:25,307 INFO L225 Difference]: With dead ends: 10559 [2021-06-05 05:18:25,308 INFO L226 Difference]: Without dead ends: 10501 [2021-06-05 05:18:25,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 2782.4ms TimeCoverageRelationStatistics Valid=528, Invalid=3132, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:18:25,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-06-05 05:18:25,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 9005. [2021-06-05 05:18:25,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9005 states, 9004 states have (on average 4.470346512661039) internal successors, (40251), 9004 states have internal predecessors, (40251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:25,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9005 states to 9005 states and 40251 transitions. [2021-06-05 05:18:25,462 INFO L78 Accepts]: Start accepts. Automaton has 9005 states and 40251 transitions. Word has length 33 [2021-06-05 05:18:25,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:25,462 INFO L482 AbstractCegarLoop]: Abstraction has 9005 states and 40251 transitions. [2021-06-05 05:18:25,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 9005 states and 40251 transitions. [2021-06-05 05:18:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:25,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:25,477 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, 1, 1, 1] [2021-06-05 05:18:25,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 05:18:25,677 INFO L430 AbstractCegarLoop]: === Iteration 237 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:25,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1064872502, now seen corresponding path program 156 times [2021-06-05 05:18:25,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:25,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385210485] [2021-06-05 05:18:25,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:25,921 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 05:18:25,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:25,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385210485] [2021-06-05 05:18:25,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385210485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:25,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130663671] [2021-06-05 05:18:25,921 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 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 05:18:25,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:18:25,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:25,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:25,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:26,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:26,125 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:18:26,125 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 29 treesize of output 57 [2021-06-05 05:18:26,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:26,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:26,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:26,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 05:18:26,316 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 05:18:26,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130663671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:26,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:26,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:18:26,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686430650] [2021-06-05 05:18:26,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:18:26,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:26,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:18:26,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:18:26,317 INFO L87 Difference]: Start difference. First operand 9005 states and 40251 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:28,207 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-05 05:18:28,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:28,468 INFO L93 Difference]: Finished difference Result 9567 states and 42334 transitions. [2021-06-05 05:18:28,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:18:28,468 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:18:28,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:28,490 INFO L225 Difference]: With dead ends: 9567 [2021-06-05 05:18:28,490 INFO L226 Difference]: Without dead ends: 9521 [2021-06-05 05:18:28,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 2002.2ms TimeCoverageRelationStatistics Valid=342, Invalid=2010, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:18:28,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9521 states. [2021-06-05 05:18:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9521 to 9011. [2021-06-05 05:18:28,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9011 states, 9010 states have (on average 4.4687014428412875) internal successors, (40263), 9010 states have internal predecessors, (40263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:28,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9011 states to 9011 states and 40263 transitions. [2021-06-05 05:18:28,633 INFO L78 Accepts]: Start accepts. Automaton has 9011 states and 40263 transitions. Word has length 33 [2021-06-05 05:18:28,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:28,633 INFO L482 AbstractCegarLoop]: Abstraction has 9011 states and 40263 transitions. [2021-06-05 05:18:28,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:28,634 INFO L276 IsEmpty]: Start isEmpty. Operand 9011 states and 40263 transitions. [2021-06-05 05:18:28,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:28,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:28,648 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, 1, 1, 1] [2021-06-05 05:18:28,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 05:18:28,853 INFO L430 AbstractCegarLoop]: === Iteration 238 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:28,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1253714068, now seen corresponding path program 157 times [2021-06-05 05:18:28,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:28,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693639441] [2021-06-05 05:18:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:29,112 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 05:18:29,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:29,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693639441] [2021-06-05 05:18:29,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693639441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:29,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026459203] [2021-06-05 05:18:29,112 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 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 05:18:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:29,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:29,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:29,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:29,269 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 29 treesize of output 13 [2021-06-05 05:18:29,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:29,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:29,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:29,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:18:29,366 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 05:18:29,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026459203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:29,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:29,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:18:29,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703797355] [2021-06-05 05:18:29,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:18:29,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:29,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:18:29,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:29,367 INFO L87 Difference]: Start difference. First operand 9011 states and 40263 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:31,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:31,628 INFO L93 Difference]: Finished difference Result 9853 states and 43487 transitions. [2021-06-05 05:18:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:18:31,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:18:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:31,651 INFO L225 Difference]: With dead ends: 9853 [2021-06-05 05:18:31,651 INFO L226 Difference]: Without dead ends: 9815 [2021-06-05 05:18:31,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 2010.7ms TimeCoverageRelationStatistics Valid=552, Invalid=2754, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:18:31,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9815 states. [2021-06-05 05:18:31,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9815 to 8999. [2021-06-05 05:18:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8999 states, 8998 states have (on average 4.470326739275395) internal successors, (40224), 8998 states have internal predecessors, (40224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8999 states to 8999 states and 40224 transitions. [2021-06-05 05:18:31,800 INFO L78 Accepts]: Start accepts. Automaton has 8999 states and 40224 transitions. Word has length 33 [2021-06-05 05:18:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:31,800 INFO L482 AbstractCegarLoop]: Abstraction has 8999 states and 40224 transitions. [2021-06-05 05:18:31,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 8999 states and 40224 transitions. [2021-06-05 05:18:31,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:31,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:31,814 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, 1, 1, 1] [2021-06-05 05:18:32,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:32,015 INFO L430 AbstractCegarLoop]: === Iteration 239 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:32,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:32,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1760505414, now seen corresponding path program 158 times [2021-06-05 05:18:32,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:32,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041440404] [2021-06-05 05:18:32,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:32,195 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 05:18:32,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:32,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041440404] [2021-06-05 05:18:32,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041440404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:32,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249084699] [2021-06-05 05:18:32,195 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 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 05:18:32,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:32,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:32,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:32,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:32,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:32,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 05:18:32,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:32,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:32,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:32,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 05:18:32,658 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 05:18:32,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249084699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:32,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:32,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:18:32,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381524320] [2021-06-05 05:18:32,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:18:32,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:32,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:18:32,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:18:32,659 INFO L87 Difference]: Start difference. First operand 8999 states and 40224 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:34,420 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-05 05:18:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:34,639 INFO L93 Difference]: Finished difference Result 9972 states and 43938 transitions. [2021-06-05 05:18:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:18:34,639 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:18:34,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:34,662 INFO L225 Difference]: With dead ends: 9972 [2021-06-05 05:18:34,662 INFO L226 Difference]: Without dead ends: 9941 [2021-06-05 05:18:34,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1796.4ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:18:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9941 states. [2021-06-05 05:18:34,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9941 to 9060. [2021-06-05 05:18:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9060 states, 9059 states have (on average 4.470581741914119) internal successors, (40499), 9059 states have internal predecessors, (40499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:34,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9060 states to 9060 states and 40499 transitions. [2021-06-05 05:18:34,826 INFO L78 Accepts]: Start accepts. Automaton has 9060 states and 40499 transitions. Word has length 33 [2021-06-05 05:18:34,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:34,826 INFO L482 AbstractCegarLoop]: Abstraction has 9060 states and 40499 transitions. [2021-06-05 05:18:34,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 9060 states and 40499 transitions. [2021-06-05 05:18:34,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:34,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:34,841 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, 1, 1, 1] [2021-06-05 05:18:35,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 05:18:35,042 INFO L430 AbstractCegarLoop]: === Iteration 240 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:35,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:35,042 INFO L82 PathProgramCache]: Analyzing trace with hash -457232808, now seen corresponding path program 159 times [2021-06-05 05:18:35,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:35,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608974673] [2021-06-05 05:18:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:35,208 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 05:18:35,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:35,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608974673] [2021-06-05 05:18:35,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608974673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:35,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233963923] [2021-06-05 05:18:35,208 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 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 05:18:35,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:18:35,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:35,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:35,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:35,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:35,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:35,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:35,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:35,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:35,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:18:35,574 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 05:18:35,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233963923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:35,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:35,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:18:35,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639484169] [2021-06-05 05:18:35,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:18:35,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:35,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:18:35,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:18:35,575 INFO L87 Difference]: Start difference. First operand 9060 states and 40499 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:37,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:37,095 INFO L93 Difference]: Finished difference Result 9717 states and 42930 transitions. [2021-06-05 05:18:37,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:18:37,096 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:18:37,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:37,126 INFO L225 Difference]: With dead ends: 9717 [2021-06-05 05:18:37,126 INFO L226 Difference]: Without dead ends: 9700 [2021-06-05 05:18:37,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1318.3ms TimeCoverageRelationStatistics Valid=378, Invalid=1602, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:18:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9700 states. [2021-06-05 05:18:37,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9700 to 9069. [2021-06-05 05:18:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9069 states, 9068 states have (on average 4.468681076312307) internal successors, (40522), 9068 states have internal predecessors, (40522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9069 states to 9069 states and 40522 transitions. [2021-06-05 05:18:37,292 INFO L78 Accepts]: Start accepts. Automaton has 9069 states and 40522 transitions. Word has length 33 [2021-06-05 05:18:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:37,292 INFO L482 AbstractCegarLoop]: Abstraction has 9069 states and 40522 transitions. [2021-06-05 05:18:37,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 9069 states and 40522 transitions. [2021-06-05 05:18:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:37,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:37,307 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, 1, 1, 1] [2021-06-05 05:18:37,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:37,508 INFO L430 AbstractCegarLoop]: === Iteration 241 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:37,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:37,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1356594880, now seen corresponding path program 160 times [2021-06-05 05:18:37,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:37,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732821743] [2021-06-05 05:18:37,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:37,765 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 05:18:37,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:37,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732821743] [2021-06-05 05:18:37,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732821743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:37,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233143302] [2021-06-05 05:18:37,766 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 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 05:18:37,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:37,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:37,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:37,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:37,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:37,931 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 29 treesize of output 13 [2021-06-05 05:18:37,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:37,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:37,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:37,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:18:38,039 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 05:18:38,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233143302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:38,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:38,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:18:38,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690776359] [2021-06-05 05:18:38,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:18:38,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:38,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:18:38,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:38,040 INFO L87 Difference]: Start difference. First operand 9069 states and 40522 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:39,180 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-06-05 05:18:40,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:40,996 INFO L93 Difference]: Finished difference Result 10775 states and 47257 transitions. [2021-06-05 05:18:40,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:18:40,996 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:18:40,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:41,081 INFO L225 Difference]: With dead ends: 10775 [2021-06-05 05:18:41,081 INFO L226 Difference]: Without dead ends: 10729 [2021-06-05 05:18:41,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 2493.1ms TimeCoverageRelationStatistics Valid=637, Invalid=3145, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:18:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10729 states. [2021-06-05 05:18:41,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10729 to 9127. [2021-06-05 05:18:41,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9127 states, 9126 states have (on average 4.471838702607934) internal successors, (40810), 9126 states have internal predecessors, (40810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:41,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9127 states to 9127 states and 40810 transitions. [2021-06-05 05:18:41,227 INFO L78 Accepts]: Start accepts. Automaton has 9127 states and 40810 transitions. Word has length 33 [2021-06-05 05:18:41,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:41,227 INFO L482 AbstractCegarLoop]: Abstraction has 9127 states and 40810 transitions. [2021-06-05 05:18:41,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:41,227 INFO L276 IsEmpty]: Start isEmpty. Operand 9127 states and 40810 transitions. [2021-06-05 05:18:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:41,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:41,242 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, 1, 1, 1] [2021-06-05 05:18:41,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:41,442 INFO L430 AbstractCegarLoop]: === Iteration 242 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:41,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:41,443 INFO L82 PathProgramCache]: Analyzing trace with hash -510619328, now seen corresponding path program 161 times [2021-06-05 05:18:41,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:41,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562712274] [2021-06-05 05:18:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:41,688 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 05:18:41,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:41,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562712274] [2021-06-05 05:18:41,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562712274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:41,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549742894] [2021-06-05 05:18:41,689 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 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 05:18:41,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:18:41,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:41,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:41,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:41,841 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 05:18:41,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:41,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:41,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:41,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 05:18:41,931 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 05:18:41,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549742894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:41,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:41,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:18:41,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642813270] [2021-06-05 05:18:41,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:41,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:41,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:41,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:41,932 INFO L87 Difference]: Start difference. First operand 9127 states and 40810 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:18:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:44,196 INFO L93 Difference]: Finished difference Result 11103 states and 47759 transitions. [2021-06-05 05:18:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:18:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:18:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:44,223 INFO L225 Difference]: With dead ends: 11103 [2021-06-05 05:18:44,223 INFO L226 Difference]: Without dead ends: 11006 [2021-06-05 05:18:44,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 2001.2ms TimeCoverageRelationStatistics Valid=563, Invalid=2407, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:18:44,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11006 states. [2021-06-05 05:18:44,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11006 to 9115. [2021-06-05 05:18:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9115 states, 9114 states have (on average 4.4738863287250386) internal successors, (40775), 9114 states have internal predecessors, (40775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9115 states to 9115 states and 40775 transitions. [2021-06-05 05:18:44,391 INFO L78 Accepts]: Start accepts. Automaton has 9115 states and 40775 transitions. Word has length 33 [2021-06-05 05:18:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:44,391 INFO L482 AbstractCegarLoop]: Abstraction has 9115 states and 40775 transitions. [2021-06-05 05:18:44,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:18:44,392 INFO L276 IsEmpty]: Start isEmpty. Operand 9115 states and 40775 transitions. [2021-06-05 05:18:44,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:44,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:44,406 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, 1, 1, 1] [2021-06-05 05:18:44,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 05:18:44,607 INFO L430 AbstractCegarLoop]: === Iteration 243 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:44,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:44,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1241273094, now seen corresponding path program 162 times [2021-06-05 05:18:44,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:44,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934793916] [2021-06-05 05:18:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:44,799 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 05:18:44,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:44,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934793916] [2021-06-05 05:18:44,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934793916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:44,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25552934] [2021-06-05 05:18:44,799 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 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 05:18:44,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:18:44,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:44,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:44,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:44,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:44,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:18:44,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:44,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:44,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:44,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:18:45,280 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 05:18:45,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25552934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:45,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:45,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:18:45,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118438884] [2021-06-05 05:18:45,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:18:45,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:45,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:18:45,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:18:45,281 INFO L87 Difference]: Start difference. First operand 9115 states and 40775 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:46,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:46,962 INFO L93 Difference]: Finished difference Result 9986 states and 44329 transitions. [2021-06-05 05:18:46,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:18:46,962 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:18:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:46,985 INFO L225 Difference]: With dead ends: 9986 [2021-06-05 05:18:46,985 INFO L226 Difference]: Without dead ends: 9934 [2021-06-05 05:18:46,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1544.8ms TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:18:46,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9934 states. [2021-06-05 05:18:47,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9934 to 9100. [2021-06-05 05:18:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9100 states, 9099 states have (on average 4.475876469941752) internal successors, (40726), 9099 states have internal predecessors, (40726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:47,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9100 states to 9100 states and 40726 transitions. [2021-06-05 05:18:47,133 INFO L78 Accepts]: Start accepts. Automaton has 9100 states and 40726 transitions. Word has length 33 [2021-06-05 05:18:47,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:47,133 INFO L482 AbstractCegarLoop]: Abstraction has 9100 states and 40726 transitions. [2021-06-05 05:18:47,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 9100 states and 40726 transitions. [2021-06-05 05:18:47,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:47,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:47,147 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, 1, 1, 1] [2021-06-05 05:18:47,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 05:18:47,348 INFO L430 AbstractCegarLoop]: === Iteration 244 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:47,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:47,348 INFO L82 PathProgramCache]: Analyzing trace with hash 674275410, now seen corresponding path program 163 times [2021-06-05 05:18:47,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:47,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441115599] [2021-06-05 05:18:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:47,525 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 05:18:47,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:47,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441115599] [2021-06-05 05:18:47,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441115599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:47,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163458476] [2021-06-05 05:18:47,525 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 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 05:18:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:47,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:47,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:47,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:47,709 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 28 treesize of output 12 [2021-06-05 05:18:47,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:47,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:47,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:47,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:18:47,786 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 05:18:47,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163458476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:47,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:47,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:18:47,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766624030] [2021-06-05 05:18:47,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:47,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:47,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:47,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:47,787 INFO L87 Difference]: Start difference. First operand 9100 states and 40726 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:49,613 INFO L93 Difference]: Finished difference Result 10911 states and 47722 transitions. [2021-06-05 05:18:49,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:18:49,613 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:18:49,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:49,637 INFO L225 Difference]: With dead ends: 10911 [2021-06-05 05:18:49,637 INFO L226 Difference]: Without dead ends: 10849 [2021-06-05 05:18:49,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1354.2ms TimeCoverageRelationStatistics Valid=427, Invalid=2653, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:18:49,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10849 states. [2021-06-05 05:18:49,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10849 to 9285. [2021-06-05 05:18:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9285 states, 9284 states have (on average 4.47824213700991) internal successors, (41576), 9284 states have internal predecessors, (41576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:49,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9285 states to 9285 states and 41576 transitions. [2021-06-05 05:18:49,795 INFO L78 Accepts]: Start accepts. Automaton has 9285 states and 41576 transitions. Word has length 33 [2021-06-05 05:18:49,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:49,795 INFO L482 AbstractCegarLoop]: Abstraction has 9285 states and 41576 transitions. [2021-06-05 05:18:49,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:49,796 INFO L276 IsEmpty]: Start isEmpty. Operand 9285 states and 41576 transitions. [2021-06-05 05:18:49,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:49,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:49,811 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, 1, 1, 1] [2021-06-05 05:18:50,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 05:18:50,011 INFO L430 AbstractCegarLoop]: === Iteration 245 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:50,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1977548016, now seen corresponding path program 164 times [2021-06-05 05:18:50,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:50,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520958529] [2021-06-05 05:18:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:50,188 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 05:18:50,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:50,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520958529] [2021-06-05 05:18:50,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520958529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:50,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502734364] [2021-06-05 05:18:50,189 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 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 05:18:50,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:50,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:50,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:50,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:50,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:50,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:18:50,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:50,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:50,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:50,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 05:18:50,557 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 05:18:50,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502734364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:50,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:50,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:18:50,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201162878] [2021-06-05 05:18:50,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:18:50,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:50,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:18:50,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:18:50,558 INFO L87 Difference]: Start difference. First operand 9285 states and 41576 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:51,849 INFO L93 Difference]: Finished difference Result 10160 states and 44849 transitions. [2021-06-05 05:18:51,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:18:51,849 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:18:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:51,873 INFO L225 Difference]: With dead ends: 10160 [2021-06-05 05:18:51,873 INFO L226 Difference]: Without dead ends: 10143 [2021-06-05 05:18:51,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1144.4ms TimeCoverageRelationStatistics Valid=314, Invalid=1408, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:18:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10143 states. [2021-06-05 05:18:51,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10143 to 9285. [2021-06-05 05:18:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9285 states, 9284 states have (on average 4.4774881516587675) internal successors, (41569), 9284 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 05:18:52,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9285 states to 9285 states and 41569 transitions. [2021-06-05 05:18:52,030 INFO L78 Accepts]: Start accepts. Automaton has 9285 states and 41569 transitions. Word has length 33 [2021-06-05 05:18:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:52,031 INFO L482 AbstractCegarLoop]: Abstraction has 9285 states and 41569 transitions. [2021-06-05 05:18:52,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 9285 states and 41569 transitions. [2021-06-05 05:18:52,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:52,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:52,045 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, 1, 1, 1] [2021-06-05 05:18:52,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-06-05 05:18:52,246 INFO L430 AbstractCegarLoop]: === Iteration 246 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:52,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:52,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1078185944, now seen corresponding path program 165 times [2021-06-05 05:18:52,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:52,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759210363] [2021-06-05 05:18:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:52,521 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 05:18:52,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:52,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759210363] [2021-06-05 05:18:52,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759210363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:52,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434391168] [2021-06-05 05:18:52,522 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 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 05:18:52,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:18:52,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:52,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:18:52,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:52,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:52,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:52,711 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 24 treesize of output 30 [2021-06-05 05:18:52,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:52,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:52,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:52,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 05:18:52,878 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 05:18:52,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434391168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:52,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:52,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:18:52,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306911587] [2021-06-05 05:18:52,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:18:52,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:52,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:18:52,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:18:52,878 INFO L87 Difference]: Start difference. First operand 9285 states and 41569 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:53,140 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-06-05 05:18:53,352 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-05 05:18:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:56,341 INFO L93 Difference]: Finished difference Result 10613 states and 46491 transitions. [2021-06-05 05:18:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:18:56,341 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:18:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:56,366 INFO L225 Difference]: With dead ends: 10613 [2021-06-05 05:18:56,366 INFO L226 Difference]: Without dead ends: 10567 [2021-06-05 05:18:56,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 3014.3ms TimeCoverageRelationStatistics Valid=599, Invalid=4093, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:18:56,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10567 states. [2021-06-05 05:18:56,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10567 to 9376. [2021-06-05 05:18:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9376 states, 9375 states have (on average 4.477973333333333) internal successors, (41981), 9375 states have internal predecessors, (41981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9376 states to 9376 states and 41981 transitions. [2021-06-05 05:18:56,536 INFO L78 Accepts]: Start accepts. Automaton has 9376 states and 41981 transitions. Word has length 33 [2021-06-05 05:18:56,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:56,536 INFO L482 AbstractCegarLoop]: Abstraction has 9376 states and 41981 transitions. [2021-06-05 05:18:56,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:56,536 INFO L276 IsEmpty]: Start isEmpty. Operand 9376 states and 41981 transitions. [2021-06-05 05:18:56,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:56,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:56,551 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, 1, 1, 1] [2021-06-05 05:18:56,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 05:18:56,752 INFO L430 AbstractCegarLoop]: === Iteration 247 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:56,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:56,752 INFO L82 PathProgramCache]: Analyzing trace with hash -702412358, now seen corresponding path program 166 times [2021-06-05 05:18:56,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:56,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249852837] [2021-06-05 05:18:56,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:57,018 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 05:18:57,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:57,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249852837] [2021-06-05 05:18:57,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249852837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:57,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590450249] [2021-06-05 05:18:57,019 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 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 05:18:57,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:57,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:57,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:18:57,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:57,205 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 05:18:57,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:57,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:57,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:57,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:18:57,287 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 05:18:57,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590450249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:57,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:57,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:18:57,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938555081] [2021-06-05 05:18:57,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:18:57,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:57,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:18:57,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:57,288 INFO L87 Difference]: Start difference. First operand 9376 states and 41981 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:59,765 INFO L93 Difference]: Finished difference Result 11136 states and 48659 transitions. [2021-06-05 05:18:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:18:59,766 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:18:59,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:59,791 INFO L225 Difference]: With dead ends: 11136 [2021-06-05 05:18:59,791 INFO L226 Difference]: Without dead ends: 11063 [2021-06-05 05:18:59,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 2067.9ms TimeCoverageRelationStatistics Valid=591, Invalid=2949, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:18:59,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11063 states. [2021-06-05 05:18:59,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11063 to 9339. [2021-06-05 05:18:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9339 states, 9338 states have (on average 4.4790104947526235) internal successors, (41825), 9338 states have internal predecessors, (41825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9339 states to 9339 states and 41825 transitions. [2021-06-05 05:18:59,956 INFO L78 Accepts]: Start accepts. Automaton has 9339 states and 41825 transitions. Word has length 33 [2021-06-05 05:18:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:59,957 INFO L482 AbstractCegarLoop]: Abstraction has 9339 states and 41825 transitions. [2021-06-05 05:18:59,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 9339 states and 41825 transitions. [2021-06-05 05:18:59,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:18:59,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:59,971 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, 1, 1, 1] [2021-06-05 05:19:00,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 05:19:00,172 INFO L430 AbstractCegarLoop]: === Iteration 248 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:00,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:00,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1193507730, now seen corresponding path program 167 times [2021-06-05 05:19:00,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:00,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239668953] [2021-06-05 05:19:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:00,362 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 05:19:00,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:00,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239668953] [2021-06-05 05:19:00,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239668953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:00,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465144078] [2021-06-05 05:19:00,362 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 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 05:19:00,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:19:00,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:00,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:00,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:00,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:00,566 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 28 treesize of output 12 [2021-06-05 05:19:00,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:00,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:00,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:00,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:19:00,644 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 05:19:00,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465144078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:00,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:00,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:19:00,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654983186] [2021-06-05 05:19:00,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:00,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:00,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:00,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:00,645 INFO L87 Difference]: Start difference. First operand 9339 states and 41825 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:02,577 INFO L93 Difference]: Finished difference Result 10634 states and 46892 transitions. [2021-06-05 05:19:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:19:02,577 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:02,601 INFO L225 Difference]: With dead ends: 10634 [2021-06-05 05:19:02,602 INFO L226 Difference]: Without dead ends: 10542 [2021-06-05 05:19:02,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1388.8ms TimeCoverageRelationStatistics Valid=285, Invalid=2265, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:19:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10542 states. [2021-06-05 05:19:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10542 to 9327. [2021-06-05 05:19:02,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9327 states, 9326 states have (on average 4.478876259918508) internal successors, (41770), 9326 states have internal predecessors, (41770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9327 states to 9327 states and 41770 transitions. [2021-06-05 05:19:02,755 INFO L78 Accepts]: Start accepts. Automaton has 9327 states and 41770 transitions. Word has length 33 [2021-06-05 05:19:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:02,755 INFO L482 AbstractCegarLoop]: Abstraction has 9327 states and 41770 transitions. [2021-06-05 05:19:02,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 9327 states and 41770 transitions. [2021-06-05 05:19:02,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:02,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:02,770 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, 1, 1, 1] [2021-06-05 05:19:02,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:02,971 INFO L430 AbstractCegarLoop]: === Iteration 249 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:02,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash 949591160, now seen corresponding path program 168 times [2021-06-05 05:19:02,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:02,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810259052] [2021-06-05 05:19:02,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:03,169 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 05:19:03,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:03,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810259052] [2021-06-05 05:19:03,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810259052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:03,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548370315] [2021-06-05 05:19:03,169 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 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 05:19:03,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:19:03,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:03,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:03,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:03,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:03,479 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:19:03,479 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 33 treesize of output 61 [2021-06-05 05:19:03,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:19:03,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:03,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:03,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-06-05 05:19:03,576 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 05:19:03,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548370315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:03,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:03,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:19:03,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542738686] [2021-06-05 05:19:03,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:19:03,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:03,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:19:03,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:19:03,577 INFO L87 Difference]: Start difference. First operand 9327 states and 41770 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:05,084 INFO L93 Difference]: Finished difference Result 10072 states and 44663 transitions. [2021-06-05 05:19:05,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:19:05,084 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:05,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:05,107 INFO L225 Difference]: With dead ends: 10072 [2021-06-05 05:19:05,107 INFO L226 Difference]: Without dead ends: 10018 [2021-06-05 05:19:05,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1191.7ms TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:19:05,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10018 states. [2021-06-05 05:19:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10018 to 9312. [2021-06-05 05:19:05,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9312 states, 9311 states have (on average 4.480077327891741) internal successors, (41714), 9311 states have internal predecessors, (41714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9312 states to 9312 states and 41714 transitions. [2021-06-05 05:19:05,262 INFO L78 Accepts]: Start accepts. Automaton has 9312 states and 41714 transitions. Word has length 33 [2021-06-05 05:19:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:05,262 INFO L482 AbstractCegarLoop]: Abstraction has 9312 states and 41714 transitions. [2021-06-05 05:19:05,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 9312 states and 41714 transitions. [2021-06-05 05:19:05,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:05,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:05,277 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, 1, 1, 1] [2021-06-05 05:19:05,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:05,478 INFO L430 AbstractCegarLoop]: === Iteration 250 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:05,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:05,478 INFO L82 PathProgramCache]: Analyzing trace with hash 832695546, now seen corresponding path program 169 times [2021-06-05 05:19:05,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:05,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939194348] [2021-06-05 05:19:05,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:05,656 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 05:19:05,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:05,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939194348] [2021-06-05 05:19:05,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939194348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:05,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272119660] [2021-06-05 05:19:05,657 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 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 05:19:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:05,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:05,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:05,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:05,845 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 28 treesize of output 12 [2021-06-05 05:19:05,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:05,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:05,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:05,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:19:05,922 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 05:19:05,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272119660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:05,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:05,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:19:05,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984353679] [2021-06-05 05:19:05,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:05,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:05,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:05,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:05,923 INFO L87 Difference]: Start difference. First operand 9312 states and 41714 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:07,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:07,831 INFO L93 Difference]: Finished difference Result 11553 states and 50585 transitions. [2021-06-05 05:19:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:19:07,832 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:07,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:07,858 INFO L225 Difference]: With dead ends: 11553 [2021-06-05 05:19:07,858 INFO L226 Difference]: Without dead ends: 11515 [2021-06-05 05:19:07,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1459.2ms TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:19:07,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11515 states. [2021-06-05 05:19:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11515 to 9457. [2021-06-05 05:19:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9457 states, 9456 states have (on average 4.486146362098139) internal successors, (42421), 9456 states have internal predecessors, (42421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9457 states to 9457 states and 42421 transitions. [2021-06-05 05:19:08,057 INFO L78 Accepts]: Start accepts. Automaton has 9457 states and 42421 transitions. Word has length 33 [2021-06-05 05:19:08,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:08,057 INFO L482 AbstractCegarLoop]: Abstraction has 9457 states and 42421 transitions. [2021-06-05 05:19:08,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 9457 states and 42421 transitions. [2021-06-05 05:19:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:08,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:08,073 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, 1, 1, 1] [2021-06-05 05:19:08,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 05:19:08,277 INFO L430 AbstractCegarLoop]: === Iteration 251 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2135968152, now seen corresponding path program 170 times [2021-06-05 05:19:08,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:08,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158032948] [2021-06-05 05:19:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:08,439 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 05:19:08,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:08,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158032948] [2021-06-05 05:19:08,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158032948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:08,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440124836] [2021-06-05 05:19:08,439 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 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 05:19:08,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:08,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:08,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:19:08,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:08,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:08,622 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 05:19:08,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:08,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:08,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:08,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-05 05:19:08,767 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 05:19:08,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440124836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:08,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:08,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:19:08,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673870321] [2021-06-05 05:19:08,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:19:08,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:08,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:19:08,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:19:08,768 INFO L87 Difference]: Start difference. First operand 9457 states and 42421 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:09,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:09,712 INFO L93 Difference]: Finished difference Result 10316 states and 45782 transitions. [2021-06-05 05:19:09,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:19:09,712 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:09,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:09,742 INFO L225 Difference]: With dead ends: 10316 [2021-06-05 05:19:09,742 INFO L226 Difference]: Without dead ends: 10303 [2021-06-05 05:19:09,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 800.5ms TimeCoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:19:09,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10303 states. [2021-06-05 05:19:09,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10303 to 9457. [2021-06-05 05:19:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9457 states, 9456 states have (on average 4.48582910321489) internal successors, (42418), 9456 states have internal predecessors, (42418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:09,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9457 states to 9457 states and 42418 transitions. [2021-06-05 05:19:09,909 INFO L78 Accepts]: Start accepts. Automaton has 9457 states and 42418 transitions. Word has length 33 [2021-06-05 05:19:09,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:09,910 INFO L482 AbstractCegarLoop]: Abstraction has 9457 states and 42418 transitions. [2021-06-05 05:19:09,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:09,910 INFO L276 IsEmpty]: Start isEmpty. Operand 9457 states and 42418 transitions. [2021-06-05 05:19:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:09,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:09,925 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, 1, 1, 1] [2021-06-05 05:19:10,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-05 05:19:10,125 INFO L430 AbstractCegarLoop]: === Iteration 252 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:10,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:10,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1236606080, now seen corresponding path program 171 times [2021-06-05 05:19:10,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:10,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983703664] [2021-06-05 05:19:10,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:10,303 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 05:19:10,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:10,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983703664] [2021-06-05 05:19:10,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983703664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:10,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443190131] [2021-06-05 05:19:10,303 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 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 05:19:10,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:19:10,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:10,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:19:10,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:10,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:10,611 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:19:10,611 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 27 treesize of output 55 [2021-06-05 05:19:10,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:19:10,655 INFO L628 ElimStorePlain]: treesize reduction 74, result has 22.9 percent of original size [2021-06-05 05:19:10,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:10,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 05:19:10,796 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 05:19:10,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443190131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:10,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:10,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:19:10,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666517858] [2021-06-05 05:19:10,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:19:10,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:10,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:19:10,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:19:10,796 INFO L87 Difference]: Start difference. First operand 9457 states and 42418 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:12,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:12,425 INFO L93 Difference]: Finished difference Result 10791 states and 47563 transitions. [2021-06-05 05:19:12,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:19:12,426 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:12,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:12,450 INFO L225 Difference]: With dead ends: 10791 [2021-06-05 05:19:12,450 INFO L226 Difference]: Without dead ends: 10755 [2021-06-05 05:19:12,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1269.1ms TimeCoverageRelationStatistics Valid=310, Invalid=2446, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:19:12,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10755 states. [2021-06-05 05:19:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10755 to 9459. [2021-06-05 05:19:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9459 states, 9458 states have (on average 4.489532670754916) internal successors, (42462), 9458 states have internal predecessors, (42462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 42462 transitions. [2021-06-05 05:19:12,624 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 42462 transitions. Word has length 33 [2021-06-05 05:19:12,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:12,624 INFO L482 AbstractCegarLoop]: Abstraction has 9459 states and 42462 transitions. [2021-06-05 05:19:12,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:12,624 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 42462 transitions. [2021-06-05 05:19:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:12,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:12,641 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, 1, 1, 1] [2021-06-05 05:19:12,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 05:19:12,842 INFO L430 AbstractCegarLoop]: === Iteration 253 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:12,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:12,842 INFO L82 PathProgramCache]: Analyzing trace with hash -149556568, now seen corresponding path program 172 times [2021-06-05 05:19:12,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:12,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564542338] [2021-06-05 05:19:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:13,020 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 05:19:13,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:13,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564542338] [2021-06-05 05:19:13,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564542338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:13,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445543978] [2021-06-05 05:19:13,020 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 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 05:19:13,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:13,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:13,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:13,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:13,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:13,217 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 28 treesize of output 12 [2021-06-05 05:19:13,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:13,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:13,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:13,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:19:13,304 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 05:19:13,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445543978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:13,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:13,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:19:13,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130371542] [2021-06-05 05:19:13,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:19:13,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:13,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:19:13,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:19:13,304 INFO L87 Difference]: Start difference. First operand 9459 states and 42462 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:15,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:15,077 INFO L93 Difference]: Finished difference Result 11292 states and 49552 transitions. [2021-06-05 05:19:15,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:19:15,077 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:15,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:15,102 INFO L225 Difference]: With dead ends: 11292 [2021-06-05 05:19:15,102 INFO L226 Difference]: Without dead ends: 11243 [2021-06-05 05:19:15,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1250.5ms TimeCoverageRelationStatistics Valid=293, Invalid=2463, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:19:15,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11243 states. [2021-06-05 05:19:15,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11243 to 9447. [2021-06-05 05:19:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9447 states, 9446 states have (on average 4.490366292610629) internal successors, (42416), 9446 states have internal predecessors, (42416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9447 states to 9447 states and 42416 transitions. [2021-06-05 05:19:15,276 INFO L78 Accepts]: Start accepts. Automaton has 9447 states and 42416 transitions. Word has length 33 [2021-06-05 05:19:15,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:15,276 INFO L482 AbstractCegarLoop]: Abstraction has 9447 states and 42416 transitions. [2021-06-05 05:19:15,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:15,277 INFO L276 IsEmpty]: Start isEmpty. Operand 9447 states and 42416 transitions. [2021-06-05 05:19:15,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:15,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:15,292 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, 1, 1, 1] [2021-06-05 05:19:15,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:15,492 INFO L430 AbstractCegarLoop]: === Iteration 254 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:15,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1925899198, now seen corresponding path program 173 times [2021-06-05 05:19:15,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:15,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657138737] [2021-06-05 05:19:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:15,668 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 05:19:15,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:15,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657138737] [2021-06-05 05:19:15,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657138737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:15,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534454487] [2021-06-05 05:19:15,668 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 05:19:15,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:19:15,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:15,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:15,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:15,918 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 05:19:15,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:15,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:15,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:15,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:19:15,980 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 05:19:15,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534454487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:15,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:15,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:19:15,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931132495] [2021-06-05 05:19:15,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:19:15,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:15,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:19:15,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:19:15,981 INFO L87 Difference]: Start difference. First operand 9447 states and 42416 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:17,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:17,163 INFO L93 Difference]: Finished difference Result 10359 states and 46156 transitions. [2021-06-05 05:19:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:19:17,163 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:17,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:17,187 INFO L225 Difference]: With dead ends: 10359 [2021-06-05 05:19:17,188 INFO L226 Difference]: Without dead ends: 10344 [2021-06-05 05:19:17,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 896.3ms TimeCoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:19:17,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10344 states. [2021-06-05 05:19:17,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10344 to 9432. [2021-06-05 05:19:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9432 states, 9431 states have (on average 4.490722086735235) internal successors, (42352), 9431 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9432 states to 9432 states and 42352 transitions. [2021-06-05 05:19:17,345 INFO L78 Accepts]: Start accepts. Automaton has 9432 states and 42352 transitions. Word has length 33 [2021-06-05 05:19:17,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:17,345 INFO L482 AbstractCegarLoop]: Abstraction has 9432 states and 42352 transitions. [2021-06-05 05:19:17,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand 9432 states and 42352 transitions. [2021-06-05 05:19:17,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:17,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:17,360 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, 1, 1, 1] [2021-06-05 05:19:17,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2021-06-05 05:19:17,560 INFO L430 AbstractCegarLoop]: === Iteration 255 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:17,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:17,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1512984130, now seen corresponding path program 174 times [2021-06-05 05:19:17,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:17,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831266631] [2021-06-05 05:19:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:17,782 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 05:19:17,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:17,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831266631] [2021-06-05 05:19:17,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831266631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:17,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796578807] [2021-06-05 05:19:17,783 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 05:19:17,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:19:17,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:17,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:17,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:17,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:17,982 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:19:17,982 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 29 treesize of output 57 [2021-06-05 05:19:17,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:18,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:18,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:18,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 05:19:18,196 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 05:19:18,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796578807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:18,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:18,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:19:18,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043657626] [2021-06-05 05:19:18,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:19:18,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:18,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:19:18,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:19:18,197 INFO L87 Difference]: Start difference. First operand 9432 states and 42352 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:18,612 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-06-05 05:19:20,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:20,225 INFO L93 Difference]: Finished difference Result 10465 states and 46438 transitions. [2021-06-05 05:19:20,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:19:20,226 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:20,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:20,250 INFO L225 Difference]: With dead ends: 10465 [2021-06-05 05:19:20,250 INFO L226 Difference]: Without dead ends: 10434 [2021-06-05 05:19:20,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1584.7ms TimeCoverageRelationStatistics Valid=396, Invalid=2574, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:19:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10434 states. [2021-06-05 05:19:20,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10434 to 9514. [2021-06-05 05:19:20,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9514 states, 9513 states have (on average 4.491117418269736) internal successors, (42724), 9513 states have internal predecessors, (42724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9514 states to 9514 states and 42724 transitions. [2021-06-05 05:19:20,419 INFO L78 Accepts]: Start accepts. Automaton has 9514 states and 42724 transitions. Word has length 33 [2021-06-05 05:19:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:20,419 INFO L482 AbstractCegarLoop]: Abstraction has 9514 states and 42724 transitions. [2021-06-05 05:19:20,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 9514 states and 42724 transitions. [2021-06-05 05:19:20,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:20,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:20,436 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, 1, 1, 1] [2021-06-05 05:19:20,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:20,637 INFO L430 AbstractCegarLoop]: === Iteration 256 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:20,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:20,638 INFO L82 PathProgramCache]: Analyzing trace with hash -209711524, now seen corresponding path program 175 times [2021-06-05 05:19:20,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:20,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624529609] [2021-06-05 05:19:20,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:20,824 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 05:19:20,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:20,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624529609] [2021-06-05 05:19:20,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624529609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:20,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501136585] [2021-06-05 05:19:20,825 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 05:19:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:20,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:20,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:20,978 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 05:19:20,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:20,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:20,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:20,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 05:19:21,073 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 05:19:21,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501136585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:21,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:21,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:19:21,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616611740] [2021-06-05 05:19:21,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:21,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:21,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:21,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:21,074 INFO L87 Difference]: Start difference. First operand 9514 states and 42724 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:22,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:22,340 INFO L93 Difference]: Finished difference Result 10978 states and 48339 transitions. [2021-06-05 05:19:22,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:19:22,341 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:22,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:22,367 INFO L225 Difference]: With dead ends: 10978 [2021-06-05 05:19:22,367 INFO L226 Difference]: Without dead ends: 10950 [2021-06-05 05:19:22,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1002.6ms TimeCoverageRelationStatistics Valid=365, Invalid=1705, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:19:22,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-06-05 05:19:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 9645. [2021-06-05 05:19:22,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9645 states, 9644 states have (on average 4.493674823724596) internal successors, (43337), 9644 states have internal predecessors, (43337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9645 states to 9645 states and 43337 transitions. [2021-06-05 05:19:22,627 INFO L78 Accepts]: Start accepts. Automaton has 9645 states and 43337 transitions. Word has length 33 [2021-06-05 05:19:22,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:22,627 INFO L482 AbstractCegarLoop]: Abstraction has 9645 states and 43337 transitions. [2021-06-05 05:19:22,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 9645 states and 43337 transitions. [2021-06-05 05:19:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:22,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:22,644 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, 1, 1, 1] [2021-06-05 05:19:22,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:22,847 INFO L430 AbstractCegarLoop]: === Iteration 257 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:22,847 INFO L82 PathProgramCache]: Analyzing trace with hash -263098044, now seen corresponding path program 176 times [2021-06-05 05:19:22,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:22,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37660848] [2021-06-05 05:19:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:23,016 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 05:19:23,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:23,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37660848] [2021-06-05 05:19:23,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37660848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:23,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825800262] [2021-06-05 05:19:23,016 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 05:19:23,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:23,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:23,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:23,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:23,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:23,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:19:23,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:23,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:23,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:23,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:19:23,371 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 05:19:23,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825800262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:23,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:23,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 05:19:23,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372524584] [2021-06-05 05:19:23,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:19:23,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:23,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:19:23,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:19:23,372 INFO L87 Difference]: Start difference. First operand 9645 states and 43337 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) 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 05:19:23,760 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-06-05 05:19:25,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:25,273 INFO L93 Difference]: Finished difference Result 10301 states and 45864 transitions. [2021-06-05 05:19:25,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:19:25,273 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 33 [2021-06-05 05:19:25,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:25,297 INFO L225 Difference]: With dead ends: 10301 [2021-06-05 05:19:25,297 INFO L226 Difference]: Without dead ends: 10278 [2021-06-05 05:19:25,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1689.2ms TimeCoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:19:25,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10278 states. [2021-06-05 05:19:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10278 to 9605. [2021-06-05 05:19:25,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9605 states, 9604 states have (on average 4.4957309454394005) internal successors, (43177), 9604 states have internal predecessors, (43177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9605 states to 9605 states and 43177 transitions. [2021-06-05 05:19:25,457 INFO L78 Accepts]: Start accepts. Automaton has 9605 states and 43177 transitions. Word has length 33 [2021-06-05 05:19:25,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:25,457 INFO L482 AbstractCegarLoop]: Abstraction has 9605 states and 43177 transitions. [2021-06-05 05:19:25,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 05:19:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 9605 states and 43177 transitions. [2021-06-05 05:19:25,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:25,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:25,473 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, 1, 1, 1] [2021-06-05 05:19:25,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-05 05:19:25,674 INFO L430 AbstractCegarLoop]: === Iteration 258 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:25,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:25,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1799731052, now seen corresponding path program 177 times [2021-06-05 05:19:25,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:25,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88962601] [2021-06-05 05:19:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:25,857 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 05:19:25,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:25,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88962601] [2021-06-05 05:19:25,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88962601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:25,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765369543] [2021-06-05 05:19:25,857 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 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 05:19:25,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:19:25,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:25,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:25,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:26,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:26,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 05:19:26,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:26,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:26,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:26,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 05:19:26,261 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 05:19:26,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765369543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:26,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:26,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:19:26,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981171007] [2021-06-05 05:19:26,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:19:26,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:26,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:19:26,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:19:26,262 INFO L87 Difference]: Start difference. First operand 9605 states and 43177 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:27,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:27,886 INFO L93 Difference]: Finished difference Result 10199 states and 45589 transitions. [2021-06-05 05:19:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:19:27,886 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:27,910 INFO L225 Difference]: With dead ends: 10199 [2021-06-05 05:19:27,910 INFO L226 Difference]: Without dead ends: 10184 [2021-06-05 05:19:27,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1259.8ms TimeCoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:19:27,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10184 states. [2021-06-05 05:19:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10184 to 9605. [2021-06-05 05:19:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9605 states, 9604 states have (on average 4.4957309454394005) internal successors, (43177), 9604 states have internal predecessors, (43177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9605 states to 9605 states and 43177 transitions. [2021-06-05 05:19:28,067 INFO L78 Accepts]: Start accepts. Automaton has 9605 states and 43177 transitions. Word has length 33 [2021-06-05 05:19:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:28,067 INFO L482 AbstractCegarLoop]: Abstraction has 9605 states and 43177 transitions. [2021-06-05 05:19:28,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 9605 states and 43177 transitions. [2021-06-05 05:19:28,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:28,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:28,083 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, 1, 1, 1] [2021-06-05 05:19:28,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:28,283 INFO L430 AbstractCegarLoop]: === Iteration 259 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:28,284 INFO L82 PathProgramCache]: Analyzing trace with hash -410643446, now seen corresponding path program 178 times [2021-06-05 05:19:28,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:28,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777752573] [2021-06-05 05:19:28,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:28,457 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 05:19:28,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:28,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777752573] [2021-06-05 05:19:28,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777752573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:28,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436561076] [2021-06-05 05:19:28,457 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 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 05:19:28,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:28,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:28,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:28,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:28,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:28,625 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 29 treesize of output 13 [2021-06-05 05:19:28,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:28,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:28,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:28,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:19:28,719 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 05:19:28,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436561076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:28,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:28,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:19:28,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384354219] [2021-06-05 05:19:28,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:19:28,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:28,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:19:28,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:19:28,720 INFO L87 Difference]: Start difference. First operand 9605 states and 43177 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:19:30,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:30,110 INFO L93 Difference]: Finished difference Result 10671 states and 47260 transitions. [2021-06-05 05:19:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:19:30,110 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 05:19:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:30,134 INFO L225 Difference]: With dead ends: 10671 [2021-06-05 05:19:30,134 INFO L226 Difference]: Without dead ends: 10647 [2021-06-05 05:19:30,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1112.7ms TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:19:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10647 states. [2021-06-05 05:19:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10647 to 9590. [2021-06-05 05:19:30,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9590 states, 9589 states have (on average 4.496923558243821) internal successors, (43121), 9589 states have internal predecessors, (43121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9590 states to 9590 states and 43121 transitions. [2021-06-05 05:19:30,302 INFO L78 Accepts]: Start accepts. Automaton has 9590 states and 43121 transitions. Word has length 33 [2021-06-05 05:19:30,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:30,302 INFO L482 AbstractCegarLoop]: Abstraction has 9590 states and 43121 transitions. [2021-06-05 05:19:30,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:19:30,302 INFO L276 IsEmpty]: Start isEmpty. Operand 9590 states and 43121 transitions. [2021-06-05 05:19:30,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:30,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:30,318 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, 1, 1, 1] [2021-06-05 05:19:30,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:30,520 INFO L430 AbstractCegarLoop]: === Iteration 260 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:30,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:30,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2054231256, now seen corresponding path program 179 times [2021-06-05 05:19:30,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:30,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068124119] [2021-06-05 05:19:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:30,763 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 05:19:30,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:30,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068124119] [2021-06-05 05:19:30,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068124119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:30,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244707424] [2021-06-05 05:19:30,763 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 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 05:19:30,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:19:30,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:30,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:30,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:30,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:30,916 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 29 treesize of output 13 [2021-06-05 05:19:30,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:30,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:30,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:30,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:19:31,009 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 05:19:31,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244707424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:31,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:31,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:19:31,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902229813] [2021-06-05 05:19:31,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:31,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:31,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:31,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:31,010 INFO L87 Difference]: Start difference. First operand 9590 states and 43121 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:32,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:32,230 INFO L93 Difference]: Finished difference Result 10722 states and 47334 transitions. [2021-06-05 05:19:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:19:32,230 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:32,254 INFO L225 Difference]: With dead ends: 10722 [2021-06-05 05:19:32,254 INFO L226 Difference]: Without dead ends: 10700 [2021-06-05 05:19:32,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 961.7ms TimeCoverageRelationStatistics Valid=344, Invalid=1548, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:19:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10700 states. [2021-06-05 05:19:32,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10700 to 9638. [2021-06-05 05:19:32,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9638 states, 9637 states have (on average 4.497353948324167) internal successors, (43341), 9637 states have internal predecessors, (43341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9638 states to 9638 states and 43341 transitions. [2021-06-05 05:19:32,429 INFO L78 Accepts]: Start accepts. Automaton has 9638 states and 43341 transitions. Word has length 33 [2021-06-05 05:19:32,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:32,429 INFO L482 AbstractCegarLoop]: Abstraction has 9638 states and 43341 transitions. [2021-06-05 05:19:32,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:32,430 INFO L276 IsEmpty]: Start isEmpty. Operand 9638 states and 43341 transitions. [2021-06-05 05:19:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:32,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:32,445 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, 1, 1, 1] [2021-06-05 05:19:32,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:32,649 INFO L430 AbstractCegarLoop]: === Iteration 261 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:32,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2000844736, now seen corresponding path program 180 times [2021-06-05 05:19:32,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:32,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563625985] [2021-06-05 05:19:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:32,815 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 05:19:32,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:32,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563625985] [2021-06-05 05:19:32,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563625985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:32,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203542327] [2021-06-05 05:19:32,816 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 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 05:19:32,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:19:32,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:32,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:32,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:32,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:33,014 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:19:33,015 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 29 treesize of output 57 [2021-06-05 05:19:33,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:33,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:33,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:33,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 05:19:33,244 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 05:19:33,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203542327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:33,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:33,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:19:33,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893794187] [2021-06-05 05:19:33,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:19:33,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:33,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:19:33,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:19:33,245 INFO L87 Difference]: Start difference. First operand 9638 states and 43341 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:34,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:34,835 INFO L93 Difference]: Finished difference Result 10474 states and 46532 transitions. [2021-06-05 05:19:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:19:34,836 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:34,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:34,859 INFO L225 Difference]: With dead ends: 10474 [2021-06-05 05:19:34,859 INFO L226 Difference]: Without dead ends: 10447 [2021-06-05 05:19:34,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1309.6ms TimeCoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:19:34,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10447 states. [2021-06-05 05:19:34,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10447 to 9614. [2021-06-05 05:19:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9614 states, 9613 states have (on average 4.5019244772703635) internal successors, (43277), 9613 states have internal predecessors, (43277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:35,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9614 states to 9614 states and 43277 transitions. [2021-06-05 05:19:35,013 INFO L78 Accepts]: Start accepts. Automaton has 9614 states and 43277 transitions. Word has length 33 [2021-06-05 05:19:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:35,013 INFO L482 AbstractCegarLoop]: Abstraction has 9614 states and 43277 transitions. [2021-06-05 05:19:35,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 9614 states and 43277 transitions. [2021-06-05 05:19:35,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:35,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:35,029 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, 1, 1, 1] [2021-06-05 05:19:35,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:35,229 INFO L430 AbstractCegarLoop]: === Iteration 262 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:35,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:35,229 INFO L82 PathProgramCache]: Analyzing trace with hash 706593546, now seen corresponding path program 181 times [2021-06-05 05:19:35,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:35,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304175612] [2021-06-05 05:19:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:35,410 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 05:19:35,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:35,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304175612] [2021-06-05 05:19:35,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304175612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:35,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71199523] [2021-06-05 05:19:35,410 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 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 05:19:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:35,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:35,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:35,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:35,584 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 29 treesize of output 13 [2021-06-05 05:19:35,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:35,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:35,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:35,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:19:35,678 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 05:19:35,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71199523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:35,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:35,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:19:35,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127036154] [2021-06-05 05:19:35,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:35,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:35,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:35,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:35,679 INFO L87 Difference]: Start difference. First operand 9614 states and 43277 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:37,306 INFO L93 Difference]: Finished difference Result 10797 states and 47783 transitions. [2021-06-05 05:19:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:19:37,306 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:37,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:37,331 INFO L225 Difference]: With dead ends: 10797 [2021-06-05 05:19:37,331 INFO L226 Difference]: Without dead ends: 10755 [2021-06-05 05:19:37,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1297.6ms TimeCoverageRelationStatistics Valid=393, Invalid=2057, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:19:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10755 states. [2021-06-05 05:19:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10755 to 9605. [2021-06-05 05:19:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9605 states, 9604 states have (on average 4.502082465639317) internal successors, (43238), 9604 states have internal predecessors, (43238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9605 states to 9605 states and 43238 transitions. [2021-06-05 05:19:37,502 INFO L78 Accepts]: Start accepts. Automaton has 9605 states and 43238 transitions. Word has length 33 [2021-06-05 05:19:37,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:37,502 INFO L482 AbstractCegarLoop]: Abstraction has 9605 states and 43238 transitions. [2021-06-05 05:19:37,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:37,502 INFO L276 IsEmpty]: Start isEmpty. Operand 9605 states and 43238 transitions. [2021-06-05 05:19:37,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:37,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:37,518 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, 1, 1, 1] [2021-06-05 05:19:37,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 05:19:37,719 INFO L430 AbstractCegarLoop]: === Iteration 263 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:37,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:37,719 INFO L82 PathProgramCache]: Analyzing trace with hash 798176900, now seen corresponding path program 182 times [2021-06-05 05:19:37,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:37,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710817397] [2021-06-05 05:19:37,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:37,899 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 05:19:37,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:37,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710817397] [2021-06-05 05:19:37,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710817397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:37,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394557782] [2021-06-05 05:19:37,900 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 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 05:19:37,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:37,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:37,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:37,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:38,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:38,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:19:38,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:38,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:38,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:38,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:19:38,288 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 05:19:38,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394557782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:38,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:38,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:19:38,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256120204] [2021-06-05 05:19:38,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:19:38,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:38,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:19:38,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:19:38,289 INFO L87 Difference]: Start difference. First operand 9605 states and 43238 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:40,319 INFO L93 Difference]: Finished difference Result 10542 states and 46915 transitions. [2021-06-05 05:19:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:19:40,319 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:40,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:40,343 INFO L225 Difference]: With dead ends: 10542 [2021-06-05 05:19:40,343 INFO L226 Difference]: Without dead ends: 10511 [2021-06-05 05:19:40,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1860.5ms TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:19:40,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10511 states. [2021-06-05 05:19:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10511 to 9633. [2021-06-05 05:19:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9633 states, 9632 states have (on average 4.505606312292358) internal successors, (43398), 9632 states have internal predecessors, (43398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9633 states to 9633 states and 43398 transitions. [2021-06-05 05:19:40,510 INFO L78 Accepts]: Start accepts. Automaton has 9633 states and 43398 transitions. Word has length 33 [2021-06-05 05:19:40,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:40,510 INFO L482 AbstractCegarLoop]: Abstraction has 9633 states and 43398 transitions. [2021-06-05 05:19:40,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:40,510 INFO L276 IsEmpty]: Start isEmpty. Operand 9633 states and 43398 transitions. [2021-06-05 05:19:40,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:40,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:40,526 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, 1, 1, 1] [2021-06-05 05:19:40,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 05:19:40,726 INFO L430 AbstractCegarLoop]: === Iteration 264 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:40,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:40,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2101449506, now seen corresponding path program 183 times [2021-06-05 05:19:40,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:40,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642883533] [2021-06-05 05:19:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:40,889 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 05:19:40,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:40,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642883533] [2021-06-05 05:19:40,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642883533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:40,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018956578] [2021-06-05 05:19:40,889 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 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 05:19:40,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:19:40,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:40,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:40,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:41,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:41,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 05:19:41,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:41,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:41,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:41,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 05:19:41,260 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 05:19:41,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018956578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:41,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:41,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:19:41,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119198280] [2021-06-05 05:19:41,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:19:41,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:41,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:19:41,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:19:41,261 INFO L87 Difference]: Start difference. First operand 9633 states and 43398 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:42,981 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 05:19:43,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:43,219 INFO L93 Difference]: Finished difference Result 10287 states and 45907 transitions. [2021-06-05 05:19:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:19:43,220 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:43,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:43,243 INFO L225 Difference]: With dead ends: 10287 [2021-06-05 05:19:43,243 INFO L226 Difference]: Without dead ends: 10270 [2021-06-05 05:19:43,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1646.7ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:19:43,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10270 states. [2021-06-05 05:19:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10270 to 9675. [2021-06-05 05:19:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9675 states, 9674 states have (on average 4.500310109572049) internal successors, (43536), 9674 states have internal predecessors, (43536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:43,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9675 states to 9675 states and 43536 transitions. [2021-06-05 05:19:43,400 INFO L78 Accepts]: Start accepts. Automaton has 9675 states and 43536 transitions. Word has length 33 [2021-06-05 05:19:43,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:43,400 INFO L482 AbstractCegarLoop]: Abstraction has 9675 states and 43536 transitions. [2021-06-05 05:19:43,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:43,400 INFO L276 IsEmpty]: Start isEmpty. Operand 9675 states and 43536 transitions. [2021-06-05 05:19:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:43,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:43,416 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, 1, 1, 1] [2021-06-05 05:19:43,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:43,617 INFO L430 AbstractCegarLoop]: === Iteration 265 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1202087434, now seen corresponding path program 184 times [2021-06-05 05:19:43,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:43,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254290057] [2021-06-05 05:19:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:43,876 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 05:19:43,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:43,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254290057] [2021-06-05 05:19:43,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254290057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:43,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652435929] [2021-06-05 05:19:43,876 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 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 05:19:43,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:43,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:43,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:43,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:44,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:44,030 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 29 treesize of output 13 [2021-06-05 05:19:44,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:44,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:44,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:44,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:19:44,128 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 05:19:44,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652435929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:44,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:44,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:19:44,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178257172] [2021-06-05 05:19:44,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:19:44,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:44,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:19:44,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:19:44,129 INFO L87 Difference]: Start difference. First operand 9675 states and 43536 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:45,376 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-05 05:19:47,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:47,221 INFO L93 Difference]: Finished difference Result 11460 states and 50511 transitions. [2021-06-05 05:19:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:19:47,222 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:47,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:47,248 INFO L225 Difference]: With dead ends: 11460 [2021-06-05 05:19:47,248 INFO L226 Difference]: Without dead ends: 11414 [2021-06-05 05:19:47,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 2780.7ms TimeCoverageRelationStatistics Valid=746, Invalid=3946, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:19:47,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11414 states. [2021-06-05 05:19:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11414 to 9772. [2021-06-05 05:19:47,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9772 states, 9771 states have (on average 4.503019138266298) internal successors, (43999), 9771 states have internal predecessors, (43999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 43999 transitions. [2021-06-05 05:19:47,476 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 43999 transitions. Word has length 33 [2021-06-05 05:19:47,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:47,476 INFO L482 AbstractCegarLoop]: Abstraction has 9772 states and 43999 transitions. [2021-06-05 05:19:47,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 43999 transitions. [2021-06-05 05:19:47,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:47,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:47,492 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, 1, 1, 1] [2021-06-05 05:19:47,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:47,692 INFO L430 AbstractCegarLoop]: === Iteration 266 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:47,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:47,693 INFO L82 PathProgramCache]: Analyzing trace with hash 2048062986, now seen corresponding path program 185 times [2021-06-05 05:19:47,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:47,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855502616] [2021-06-05 05:19:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:47,943 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 05:19:47,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:47,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855502616] [2021-06-05 05:19:47,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855502616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:47,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280918051] [2021-06-05 05:19:47,944 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 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 05:19:47,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:19:47,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:47,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:47,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:48,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:48,098 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 29 treesize of output 13 [2021-06-05 05:19:48,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:48,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:48,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:48,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:19:48,188 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 05:19:48,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280918051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:48,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:48,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:19:48,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905101641] [2021-06-05 05:19:48,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:48,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:48,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:48,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:48,189 INFO L87 Difference]: Start difference. First operand 9772 states and 43999 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:19:50,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:50,705 INFO L93 Difference]: Finished difference Result 11677 states and 50688 transitions. [2021-06-05 05:19:50,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:19:50,705 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:19:50,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:50,731 INFO L225 Difference]: With dead ends: 11677 [2021-06-05 05:19:50,731 INFO L226 Difference]: Without dead ends: 11616 [2021-06-05 05:19:50,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 2236.2ms TimeCoverageRelationStatistics Valid=641, Invalid=2781, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:19:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11616 states. [2021-06-05 05:19:50,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11616 to 9707. [2021-06-05 05:19:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9707 states, 9706 states have (on average 4.5029878425716054) internal successors, (43706), 9706 states have internal predecessors, (43706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9707 states to 9707 states and 43706 transitions. [2021-06-05 05:19:50,912 INFO L78 Accepts]: Start accepts. Automaton has 9707 states and 43706 transitions. Word has length 33 [2021-06-05 05:19:50,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:50,912 INFO L482 AbstractCegarLoop]: Abstraction has 9707 states and 43706 transitions. [2021-06-05 05:19:50,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:19:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 9707 states and 43706 transitions. [2021-06-05 05:19:50,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:50,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:50,928 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, 1, 1, 1] [2021-06-05 05:19:51,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-06-05 05:19:51,128 INFO L430 AbstractCegarLoop]: === Iteration 267 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:51,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:51,128 INFO L82 PathProgramCache]: Analyzing trace with hash -184075214, now seen corresponding path program 186 times [2021-06-05 05:19:51,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:51,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786595465] [2021-06-05 05:19:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:51,455 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 05:19:51,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:51,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786595465] [2021-06-05 05:19:51,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786595465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:51,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809523106] [2021-06-05 05:19:51,455 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 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 05:19:51,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:19:51,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:51,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:51,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:51,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:51,658 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:19:51,658 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 29 treesize of output 57 [2021-06-05 05:19:51,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:51,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:51,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:51,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 05:19:51,889 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 05:19:51,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809523106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:51,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:51,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:19:51,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572150713] [2021-06-05 05:19:51,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:19:51,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:51,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:19:51,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:19:51,890 INFO L87 Difference]: Start difference. First operand 9707 states and 43706 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:53,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:53,931 INFO L93 Difference]: Finished difference Result 10786 states and 47327 transitions. [2021-06-05 05:19:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:19:53,931 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:53,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:53,955 INFO L225 Difference]: With dead ends: 10786 [2021-06-05 05:19:53,956 INFO L226 Difference]: Without dead ends: 10716 [2021-06-05 05:19:53,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1973.7ms TimeCoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:19:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10716 states. [2021-06-05 05:19:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10716 to 9692. [2021-06-05 05:19:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9692 states, 9691 states have (on average 4.504901454958208) internal successors, (43657), 9691 states have internal predecessors, (43657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:54,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9692 states to 9692 states and 43657 transitions. [2021-06-05 05:19:54,130 INFO L78 Accepts]: Start accepts. Automaton has 9692 states and 43657 transitions. Word has length 33 [2021-06-05 05:19:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:54,130 INFO L482 AbstractCegarLoop]: Abstraction has 9692 states and 43657 transitions. [2021-06-05 05:19:54,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:54,130 INFO L276 IsEmpty]: Start isEmpty. Operand 9692 states and 43657 transitions. [2021-06-05 05:19:54,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:54,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:54,146 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, 1, 1, 1] [2021-06-05 05:19:54,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:54,346 INFO L430 AbstractCegarLoop]: === Iteration 268 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:54,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:54,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1232847616, now seen corresponding path program 187 times [2021-06-05 05:19:54,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:54,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296527888] [2021-06-05 05:19:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:54,523 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 05:19:54,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:54,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296527888] [2021-06-05 05:19:54,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296527888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:54,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206467761] [2021-06-05 05:19:54,524 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 05:19:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:54,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:54,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:54,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:54,687 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 29 treesize of output 13 [2021-06-05 05:19:54,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:54,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:54,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:54,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:19:54,778 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 05:19:54,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206467761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:54,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:54,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:19:54,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113442748] [2021-06-05 05:19:54,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:54,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:54,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:54,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:54,779 INFO L87 Difference]: Start difference. First operand 9692 states and 43657 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:56,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:56,218 INFO L93 Difference]: Finished difference Result 10895 states and 48173 transitions. [2021-06-05 05:19:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:19:56,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:56,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:56,242 INFO L225 Difference]: With dead ends: 10895 [2021-06-05 05:19:56,243 INFO L226 Difference]: Without dead ends: 10793 [2021-06-05 05:19:56,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1257.9ms TimeCoverageRelationStatistics Valid=469, Invalid=2183, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:19:56,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10793 states. [2021-06-05 05:19:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10793 to 9703. [2021-06-05 05:19:56,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9703 states, 9702 states have (on average 4.510822510822511) internal successors, (43764), 9702 states have internal predecessors, (43764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:56,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9703 states to 9703 states and 43764 transitions. [2021-06-05 05:19:56,421 INFO L78 Accepts]: Start accepts. Automaton has 9703 states and 43764 transitions. Word has length 33 [2021-06-05 05:19:56,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:56,421 INFO L482 AbstractCegarLoop]: Abstraction has 9703 states and 43764 transitions. [2021-06-05 05:19:56,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 9703 states and 43764 transitions. [2021-06-05 05:19:56,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:56,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:56,437 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, 1, 1, 1] [2021-06-05 05:19:56,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 05:19:56,638 INFO L430 AbstractCegarLoop]: === Iteration 269 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:56,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:56,638 INFO L82 PathProgramCache]: Analyzing trace with hash -713615296, now seen corresponding path program 188 times [2021-06-05 05:19:56,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:56,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739154801] [2021-06-05 05:19:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:56,822 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 05:19:56,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:56,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739154801] [2021-06-05 05:19:56,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739154801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:56,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105553147] [2021-06-05 05:19:56,823 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 05:19:56,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:56,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:56,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:56,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:56,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:56,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:19:56,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:56,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:56,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:56,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:19:57,216 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 05:19:57,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105553147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:57,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:57,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:19:57,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294632021] [2021-06-05 05:19:57,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:19:57,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:57,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:19:57,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:19:57,217 INFO L87 Difference]: Start difference. First operand 9703 states and 43764 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:58,781 INFO L93 Difference]: Finished difference Result 10558 states and 47249 transitions. [2021-06-05 05:19:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:19:58,782 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:19:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:58,806 INFO L225 Difference]: With dead ends: 10558 [2021-06-05 05:19:58,806 INFO L226 Difference]: Without dead ends: 10518 [2021-06-05 05:19:58,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1351.1ms TimeCoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:19:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10518 states. [2021-06-05 05:19:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10518 to 9706. [2021-06-05 05:19:58,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9706 states, 9705 states have (on average 4.510046367851623) internal successors, (43770), 9705 states have internal predecessors, (43770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 43770 transitions. [2021-06-05 05:19:58,971 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 43770 transitions. Word has length 33 [2021-06-05 05:19:58,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:58,971 INFO L482 AbstractCegarLoop]: Abstraction has 9706 states and 43770 transitions. [2021-06-05 05:19:58,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:58,972 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 43770 transitions. [2021-06-05 05:19:58,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:19:58,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:58,987 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, 1, 1, 1] [2021-06-05 05:19:59,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:59,187 INFO L430 AbstractCegarLoop]: === Iteration 270 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:59,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:59,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1648437726, now seen corresponding path program 189 times [2021-06-05 05:19:59,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:59,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010770013] [2021-06-05 05:19:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:59,351 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 05:19:59,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:59,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010770013] [2021-06-05 05:19:59,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010770013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:59,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622690628] [2021-06-05 05:19:59,351 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 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 05:19:59,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:19:59,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:59,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:19:59,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:59,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:59,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 05:19:59,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:59,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:59,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:59,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 05:19:59,827 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 05:19:59,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622690628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:59,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:59,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:19:59,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179091529] [2021-06-05 05:19:59,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:19:59,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:59,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:19:59,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:19:59,828 INFO L87 Difference]: Start difference. First operand 9706 states and 43770 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:00,857 INFO L93 Difference]: Finished difference Result 10156 states and 45555 transitions. [2021-06-05 05:20:00,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:20:00,857 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:00,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:00,880 INFO L225 Difference]: With dead ends: 10156 [2021-06-05 05:20:00,880 INFO L226 Difference]: Without dead ends: 10127 [2021-06-05 05:20:00,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1014.1ms TimeCoverageRelationStatistics Valid=276, Invalid=1284, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:20:00,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10127 states. [2021-06-05 05:20:01,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10127 to 9691. [2021-06-05 05:20:01,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9691 states, 9690 states have (on average 4.511971104231166) internal successors, (43721), 9690 states have internal predecessors, (43721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9691 states to 9691 states and 43721 transitions. [2021-06-05 05:20:01,040 INFO L78 Accepts]: Start accepts. Automaton has 9691 states and 43721 transitions. Word has length 33 [2021-06-05 05:20:01,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:01,040 INFO L482 AbstractCegarLoop]: Abstraction has 9691 states and 43721 transitions. [2021-06-05 05:20:01,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 9691 states and 43721 transitions. [2021-06-05 05:20:01,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:01,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:01,056 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, 1, 1, 1] [2021-06-05 05:20:01,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 05:20:01,257 INFO L430 AbstractCegarLoop]: === Iteration 271 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:01,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1789761482, now seen corresponding path program 190 times [2021-06-05 05:20:01,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:01,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734623903] [2021-06-05 05:20:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:01,485 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 05:20:01,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:01,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734623903] [2021-06-05 05:20:01,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734623903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:01,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884915818] [2021-06-05 05:20:01,485 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 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 05:20:01,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:01,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:01,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:01,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:01,721 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 20 treesize of output 12 [2021-06-05 05:20:01,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:01,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:01,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:01,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:20:01,823 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 05:20:01,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884915818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:01,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:01,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:01,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371792821] [2021-06-05 05:20:01,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:01,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:01,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:01,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:01,824 INFO L87 Difference]: Start difference. First operand 9691 states and 43721 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:03,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:03,045 INFO L93 Difference]: Finished difference Result 11007 states and 48616 transitions. [2021-06-05 05:20:03,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:20:03,045 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:03,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:03,070 INFO L225 Difference]: With dead ends: 11007 [2021-06-05 05:20:03,070 INFO L226 Difference]: Without dead ends: 10967 [2021-06-05 05:20:03,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 895.5ms TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:20:03,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10967 states. [2021-06-05 05:20:03,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10967 to 9764. [2021-06-05 05:20:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9764 states, 9763 states have (on average 4.5145959233842055) internal successors, (44076), 9763 states have internal predecessors, (44076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9764 states to 9764 states and 44076 transitions. [2021-06-05 05:20:03,355 INFO L78 Accepts]: Start accepts. Automaton has 9764 states and 44076 transitions. Word has length 33 [2021-06-05 05:20:03,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:03,355 INFO L482 AbstractCegarLoop]: Abstraction has 9764 states and 44076 transitions. [2021-06-05 05:20:03,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:03,355 INFO L276 IsEmpty]: Start isEmpty. Operand 9764 states and 44076 transitions. [2021-06-05 05:20:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:03,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:03,371 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, 1, 1, 1] [2021-06-05 05:20:03,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:03,572 INFO L430 AbstractCegarLoop]: === Iteration 272 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:03,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:03,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1843148002, now seen corresponding path program 191 times [2021-06-05 05:20:03,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:03,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790334880] [2021-06-05 05:20:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:03,833 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 05:20:03,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:03,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790334880] [2021-06-05 05:20:03,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790334880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:03,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804638937] [2021-06-05 05:20:03,833 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 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 05:20:03,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:20:03,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:03,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:03,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:04,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:04,006 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 28 treesize of output 12 [2021-06-05 05:20:04,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:04,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:04,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:04,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:20:04,079 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 05:20:04,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804638937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:04,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:04,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:20:04,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423703053] [2021-06-05 05:20:04,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:04,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:04,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:04,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:04,080 INFO L87 Difference]: Start difference. First operand 9764 states and 44076 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:20:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:07,258 INFO L93 Difference]: Finished difference Result 12376 states and 53228 transitions. [2021-06-05 05:20:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:20:07,258 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:20:07,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:07,288 INFO L225 Difference]: With dead ends: 12376 [2021-06-05 05:20:07,288 INFO L226 Difference]: Without dead ends: 12247 [2021-06-05 05:20:07,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 2725.7ms TimeCoverageRelationStatistics Valid=635, Invalid=3271, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:20:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12247 states. [2021-06-05 05:20:07,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12247 to 9736. [2021-06-05 05:20:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9736 states, 9735 states have (on average 4.514021571648691) internal successors, (43944), 9735 states have internal predecessors, (43944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9736 states to 9736 states and 43944 transitions. [2021-06-05 05:20:07,506 INFO L78 Accepts]: Start accepts. Automaton has 9736 states and 43944 transitions. Word has length 33 [2021-06-05 05:20:07,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:07,506 INFO L482 AbstractCegarLoop]: Abstraction has 9736 states and 43944 transitions. [2021-06-05 05:20:07,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:20:07,506 INFO L276 IsEmpty]: Start isEmpty. Operand 9736 states and 43944 transitions. [2021-06-05 05:20:07,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:07,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:07,524 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, 1, 1, 1] [2021-06-05 05:20:07,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:07,724 INFO L430 AbstractCegarLoop]: === Iteration 273 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:07,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:07,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1477248958, now seen corresponding path program 192 times [2021-06-05 05:20:07,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:07,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906102943] [2021-06-05 05:20:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:08,008 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 05:20:08,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:08,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906102943] [2021-06-05 05:20:08,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906102943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:08,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961488148] [2021-06-05 05:20:08,008 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 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 05:20:08,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:20:08,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:08,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:08,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:08,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:08,342 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:20:08,342 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 33 treesize of output 61 [2021-06-05 05:20:08,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:20:08,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:08,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:08,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-06-05 05:20:08,448 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 05:20:08,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961488148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:08,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:08,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:20:08,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133370027] [2021-06-05 05:20:08,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:20:08,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:08,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:20:08,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:20:08,449 INFO L87 Difference]: Start difference. First operand 9736 states and 43944 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:10,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:10,062 INFO L93 Difference]: Finished difference Result 10492 states and 46870 transitions. [2021-06-05 05:20:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:20:10,063 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:10,087 INFO L225 Difference]: With dead ends: 10492 [2021-06-05 05:20:10,087 INFO L226 Difference]: Without dead ends: 10446 [2021-06-05 05:20:10,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1369.8ms TimeCoverageRelationStatistics Valid=210, Invalid=2046, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:20:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10446 states. [2021-06-05 05:20:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10446 to 9736. [2021-06-05 05:20:10,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9736 states, 9735 states have (on average 4.513816127375449) internal successors, (43942), 9735 states have internal predecessors, (43942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9736 states to 9736 states and 43942 transitions. [2021-06-05 05:20:10,257 INFO L78 Accepts]: Start accepts. Automaton has 9736 states and 43942 transitions. Word has length 33 [2021-06-05 05:20:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:10,257 INFO L482 AbstractCegarLoop]: Abstraction has 9736 states and 43942 transitions. [2021-06-05 05:20:10,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 9736 states and 43942 transitions. [2021-06-05 05:20:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:10,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:10,273 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, 1, 1, 1] [2021-06-05 05:20:10,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:10,474 INFO L430 AbstractCegarLoop]: === Iteration 274 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:10,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:10,474 INFO L82 PathProgramCache]: Analyzing trace with hash -105794736, now seen corresponding path program 193 times [2021-06-05 05:20:10,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:10,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712728182] [2021-06-05 05:20:10,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:10,714 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 05:20:10,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:10,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712728182] [2021-06-05 05:20:10,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712728182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:10,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249243664] [2021-06-05 05:20:10,715 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 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 05:20:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:10,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:10,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:10,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:10,913 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 28 treesize of output 12 [2021-06-05 05:20:10,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:10,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:10,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:10,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:20:10,988 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 05:20:10,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249243664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:10,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:10,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:20:10,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062263296] [2021-06-05 05:20:10,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:10,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:10,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:10,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:10,989 INFO L87 Difference]: Start difference. First operand 9736 states and 43942 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:12,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:12,693 INFO L93 Difference]: Finished difference Result 10873 states and 48466 transitions. [2021-06-05 05:20:12,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:20:12,693 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:12,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:12,718 INFO L225 Difference]: With dead ends: 10873 [2021-06-05 05:20:12,718 INFO L226 Difference]: Without dead ends: 10782 [2021-06-05 05:20:12,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1369.2ms TimeCoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:20:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10782 states. [2021-06-05 05:20:12,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10782 to 9721. [2021-06-05 05:20:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9721 states, 9720 states have (on average 4.515432098765432) internal successors, (43890), 9720 states have internal predecessors, (43890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9721 states to 9721 states and 43890 transitions. [2021-06-05 05:20:12,888 INFO L78 Accepts]: Start accepts. Automaton has 9721 states and 43890 transitions. Word has length 33 [2021-06-05 05:20:12,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:12,888 INFO L482 AbstractCegarLoop]: Abstraction has 9721 states and 43890 transitions. [2021-06-05 05:20:12,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 9721 states and 43890 transitions. [2021-06-05 05:20:12,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:12,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:12,904 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, 1, 1, 1] [2021-06-05 05:20:13,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 05:20:13,104 INFO L430 AbstractCegarLoop]: === Iteration 275 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:13,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:13,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1005922848, now seen corresponding path program 194 times [2021-06-05 05:20:13,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:13,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123875519] [2021-06-05 05:20:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:13,334 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 05:20:13,401 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 05:20:13,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:13,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123875519] [2021-06-05 05:20:13,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123875519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:13,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512225107] [2021-06-05 05:20:13,401 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 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 05:20:13,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:13,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:13,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:13,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:13,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:13,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:13,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:13,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:13,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:13,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:20:13,825 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 05:20:13,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512225107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:13,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:13,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:20:13,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391477896] [2021-06-05 05:20:13,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:20:13,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:13,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:20:13,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:20:13,826 INFO L87 Difference]: Start difference. First operand 9721 states and 43890 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:14,001 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-05 05:20:14,135 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-06-05 05:20:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:16,071 INFO L93 Difference]: Finished difference Result 10514 states and 46949 transitions. [2021-06-05 05:20:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:20:16,071 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:16,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:16,101 INFO L225 Difference]: With dead ends: 10514 [2021-06-05 05:20:16,102 INFO L226 Difference]: Without dead ends: 10483 [2021-06-05 05:20:16,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 2111.8ms TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:20:16,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10483 states. [2021-06-05 05:20:16,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10483 to 9725. [2021-06-05 05:20:16,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9725 states, 9724 states have (on average 4.514294529000411) internal successors, (43897), 9724 states have internal predecessors, (43897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9725 states to 9725 states and 43897 transitions. [2021-06-05 05:20:16,277 INFO L78 Accepts]: Start accepts. Automaton has 9725 states and 43897 transitions. Word has length 33 [2021-06-05 05:20:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:16,277 INFO L482 AbstractCegarLoop]: Abstraction has 9725 states and 43897 transitions. [2021-06-05 05:20:16,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 9725 states and 43897 transitions. [2021-06-05 05:20:16,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:16,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:16,293 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, 1, 1, 1] [2021-06-05 05:20:16,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 05:20:16,494 INFO L430 AbstractCegarLoop]: === Iteration 276 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:16,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:16,494 INFO L82 PathProgramCache]: Analyzing trace with hash 297349758, now seen corresponding path program 195 times [2021-06-05 05:20:16,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:16,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676465986] [2021-06-05 05:20:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:16,676 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 05:20:16,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:16,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676465986] [2021-06-05 05:20:16,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676465986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:16,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187835557] [2021-06-05 05:20:16,676 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 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 05:20:16,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:20:16,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:16,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:16,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:16,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:16,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 05:20:16,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:16,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:16,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:16,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 05:20:17,060 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 05:20:17,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187835557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:17,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:17,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:20:17,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571391743] [2021-06-05 05:20:17,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:20:17,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:17,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:20:17,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:20:17,060 INFO L87 Difference]: Start difference. First operand 9725 states and 43897 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:18,668 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 05:20:18,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:18,893 INFO L93 Difference]: Finished difference Result 10399 states and 46455 transitions. [2021-06-05 05:20:18,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:20:18,893 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:18,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:18,916 INFO L225 Difference]: With dead ends: 10399 [2021-06-05 05:20:18,916 INFO L226 Difference]: Without dead ends: 10390 [2021-06-05 05:20:18,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1721.7ms TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:20:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10390 states. [2021-06-05 05:20:19,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10390 to 9734. [2021-06-05 05:20:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9734 states, 9733 states have (on average 4.513202506935169) internal successors, (43927), 9733 states have internal predecessors, (43927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9734 states to 9734 states and 43927 transitions. [2021-06-05 05:20:19,083 INFO L78 Accepts]: Start accepts. Automaton has 9734 states and 43927 transitions. Word has length 33 [2021-06-05 05:20:19,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:19,083 INFO L482 AbstractCegarLoop]: Abstraction has 9734 states and 43927 transitions. [2021-06-05 05:20:19,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:19,083 INFO L276 IsEmpty]: Start isEmpty. Operand 9734 states and 43927 transitions. [2021-06-05 05:20:19,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:19,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:19,099 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, 1, 1, 1] [2021-06-05 05:20:19,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:19,299 INFO L430 AbstractCegarLoop]: === Iteration 277 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:19,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:19,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1371043684, now seen corresponding path program 196 times [2021-06-05 05:20:19,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:19,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50765565] [2021-06-05 05:20:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:19,493 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 05:20:19,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:19,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50765565] [2021-06-05 05:20:19,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50765565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:19,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140264426] [2021-06-05 05:20:19,493 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 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 05:20:19,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:19,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:19,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:19,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:19,653 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 05:20:19,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:19,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:19,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:19,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 05:20:19,742 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 05:20:19,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140264426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:19,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:19,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:20:19,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619985566] [2021-06-05 05:20:19,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:19,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:19,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:19,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:19,743 INFO L87 Difference]: Start difference. First operand 9734 states and 43927 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:20:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:21,136 INFO L93 Difference]: Finished difference Result 10779 states and 47882 transitions. [2021-06-05 05:20:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:20:21,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:20:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:21,161 INFO L225 Difference]: With dead ends: 10779 [2021-06-05 05:20:21,162 INFO L226 Difference]: Without dead ends: 10751 [2021-06-05 05:20:21,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1153.6ms TimeCoverageRelationStatistics Valid=388, Invalid=1964, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:20:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10751 states. [2021-06-05 05:20:21,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10751 to 9782. [2021-06-05 05:20:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9782 states, 9781 states have (on average 4.516511604130457) internal successors, (44176), 9781 states have internal predecessors, (44176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9782 states to 9782 states and 44176 transitions. [2021-06-05 05:20:21,336 INFO L78 Accepts]: Start accepts. Automaton has 9782 states and 44176 transitions. Word has length 33 [2021-06-05 05:20:21,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:21,336 INFO L482 AbstractCegarLoop]: Abstraction has 9782 states and 44176 transitions. [2021-06-05 05:20:21,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:20:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 9782 states and 44176 transitions. [2021-06-05 05:20:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:21,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:21,352 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, 1, 1, 1] [2021-06-05 05:20:21,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:21,552 INFO L430 AbstractCegarLoop]: === Iteration 278 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:21,553 INFO L82 PathProgramCache]: Analyzing trace with hash -602012314, now seen corresponding path program 197 times [2021-06-05 05:20:21,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:21,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935622756] [2021-06-05 05:20:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:21,809 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 05:20:21,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:21,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935622756] [2021-06-05 05:20:21,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935622756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:21,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415593859] [2021-06-05 05:20:21,809 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 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 05:20:21,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:20:21,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:21,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:21,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:21,973 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 29 treesize of output 13 [2021-06-05 05:20:21,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:21,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:21,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:21,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:20:22,101 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 05:20:22,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415593859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:22,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:22,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:20:22,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965105476] [2021-06-05 05:20:22,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:20:22,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:22,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:20:22,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:20:22,102 INFO L87 Difference]: Start difference. First operand 9782 states and 44176 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:23,713 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-05 05:20:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:25,821 INFO L93 Difference]: Finished difference Result 11274 states and 49885 transitions. [2021-06-05 05:20:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 05:20:25,821 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:25,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:25,846 INFO L225 Difference]: With dead ends: 11274 [2021-06-05 05:20:25,846 INFO L226 Difference]: Without dead ends: 11166 [2021-06-05 05:20:25,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 3213.5ms TimeCoverageRelationStatistics Valid=758, Invalid=4792, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:20:25,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11166 states. [2021-06-05 05:20:25,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11166 to 9777. [2021-06-05 05:20:25,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9777 states, 9776 states have (on average 4.514934533551555) internal successors, (44138), 9776 states have internal predecessors, (44138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9777 states to 9777 states and 44138 transitions. [2021-06-05 05:20:26,020 INFO L78 Accepts]: Start accepts. Automaton has 9777 states and 44138 transitions. Word has length 33 [2021-06-05 05:20:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:26,020 INFO L482 AbstractCegarLoop]: Abstraction has 9777 states and 44138 transitions. [2021-06-05 05:20:26,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:26,020 INFO L276 IsEmpty]: Start isEmpty. Operand 9777 states and 44138 transitions. [2021-06-05 05:20:26,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:26,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:26,039 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, 1, 1, 1] [2021-06-05 05:20:26,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-06-05 05:20:26,240 INFO L430 AbstractCegarLoop]: === Iteration 279 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:26,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1988174962, now seen corresponding path program 198 times [2021-06-05 05:20:26,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:26,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830330629] [2021-06-05 05:20:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:26,474 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 05:20:26,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:26,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830330629] [2021-06-05 05:20:26,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830330629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:26,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194871840] [2021-06-05 05:20:26,475 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 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 05:20:26,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:20:26,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:26,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:26,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:26,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:26,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:26,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:26,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:26,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:26,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:20:26,868 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 05:20:26,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194871840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:26,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:26,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:20:26,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839231709] [2021-06-05 05:20:26,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:20:26,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:26,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:20:26,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:20:26,869 INFO L87 Difference]: Start difference. First operand 9777 states and 44138 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:27,093 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-06-05 05:20:29,347 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-05 05:20:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:29,551 INFO L93 Difference]: Finished difference Result 11063 states and 48490 transitions. [2021-06-05 05:20:29,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:20:29,552 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:29,576 INFO L225 Difference]: With dead ends: 11063 [2021-06-05 05:20:29,577 INFO L226 Difference]: Without dead ends: 11022 [2021-06-05 05:20:29,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 2226.7ms TimeCoverageRelationStatistics Valid=333, Invalid=2859, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:20:29,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11022 states. [2021-06-05 05:20:29,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11022 to 9762. [2021-06-05 05:20:29,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9762 states, 9761 states have (on average 4.516852781477308) internal successors, (44089), 9761 states have internal predecessors, (44089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9762 states to 9762 states and 44089 transitions. [2021-06-05 05:20:29,742 INFO L78 Accepts]: Start accepts. Automaton has 9762 states and 44089 transitions. Word has length 33 [2021-06-05 05:20:29,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:29,742 INFO L482 AbstractCegarLoop]: Abstraction has 9762 states and 44089 transitions. [2021-06-05 05:20:29,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:29,743 INFO L276 IsEmpty]: Start isEmpty. Operand 9762 states and 44089 transitions. [2021-06-05 05:20:29,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:29,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:29,758 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, 1, 1, 1] [2021-06-05 05:20:29,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:29,959 INFO L430 AbstractCegarLoop]: === Iteration 280 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:29,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:29,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1258019932, now seen corresponding path program 199 times [2021-06-05 05:20:29,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:29,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109427038] [2021-06-05 05:20:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:30,140 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 05:20:30,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:30,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109427038] [2021-06-05 05:20:30,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109427038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:30,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421626916] [2021-06-05 05:20:30,140 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 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 05:20:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:30,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:30,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:30,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:30,302 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 29 treesize of output 13 [2021-06-05 05:20:30,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:30,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:30,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:30,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:20:30,394 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 05:20:30,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421626916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:30,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:30,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:20:30,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762397166] [2021-06-05 05:20:30,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:30,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:30,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:30,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:30,395 INFO L87 Difference]: Start difference. First operand 9762 states and 44089 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:32,166 INFO L93 Difference]: Finished difference Result 11137 states and 49368 transitions. [2021-06-05 05:20:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:20:32,166 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:32,191 INFO L225 Difference]: With dead ends: 11137 [2021-06-05 05:20:32,191 INFO L226 Difference]: Without dead ends: 11075 [2021-06-05 05:20:32,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1529.4ms TimeCoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:20:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11075 states. [2021-06-05 05:20:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11075 to 9924. [2021-06-05 05:20:32,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9924 states, 9923 states have (on average 4.514058248513554) internal successors, (44793), 9923 states have internal predecessors, (44793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9924 states to 9924 states and 44793 transitions. [2021-06-05 05:20:32,359 INFO L78 Accepts]: Start accepts. Automaton has 9924 states and 44793 transitions. Word has length 33 [2021-06-05 05:20:32,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:32,360 INFO L482 AbstractCegarLoop]: Abstraction has 9924 states and 44793 transitions. [2021-06-05 05:20:32,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:32,360 INFO L276 IsEmpty]: Start isEmpty. Operand 9924 states and 44793 transitions. [2021-06-05 05:20:32,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:32,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:32,375 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, 1, 1, 1] [2021-06-05 05:20:32,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:32,576 INFO L430 AbstractCegarLoop]: === Iteration 281 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:32,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:32,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1733674758, now seen corresponding path program 200 times [2021-06-05 05:20:32,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:32,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903395418] [2021-06-05 05:20:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:32,747 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 05:20:32,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:32,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903395418] [2021-06-05 05:20:32,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903395418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:32,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910918838] [2021-06-05 05:20:32,748 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 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 05:20:32,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:32,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:32,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:32,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:32,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:32,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:20:32,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:32,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:32,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:32,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:20:33,116 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 05:20:33,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910918838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:33,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:33,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:20:33,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769679574] [2021-06-05 05:20:33,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:20:33,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:33,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:20:33,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:20:33,117 INFO L87 Difference]: Start difference. First operand 9924 states and 44793 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:34,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:34,736 INFO L93 Difference]: Finished difference Result 10550 states and 47099 transitions. [2021-06-05 05:20:34,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:20:34,737 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:34,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:34,761 INFO L225 Difference]: With dead ends: 10550 [2021-06-05 05:20:34,761 INFO L226 Difference]: Without dead ends: 10533 [2021-06-05 05:20:34,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1320.8ms TimeCoverageRelationStatistics Valid=386, Invalid=1684, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:20:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10533 states. [2021-06-05 05:20:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10533 to 9924. [2021-06-05 05:20:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9924 states, 9923 states have (on average 4.513352816688501) internal successors, (44786), 9923 states have internal predecessors, (44786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:34,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9924 states to 9924 states and 44786 transitions. [2021-06-05 05:20:34,928 INFO L78 Accepts]: Start accepts. Automaton has 9924 states and 44786 transitions. Word has length 33 [2021-06-05 05:20:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:34,928 INFO L482 AbstractCegarLoop]: Abstraction has 9924 states and 44786 transitions. [2021-06-05 05:20:34,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 9924 states and 44786 transitions. [2021-06-05 05:20:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:34,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:34,944 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, 1, 1, 1] [2021-06-05 05:20:35,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable410,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:35,145 INFO L430 AbstractCegarLoop]: === Iteration 282 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:35,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1661930466, now seen corresponding path program 201 times [2021-06-05 05:20:35,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:35,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066605314] [2021-06-05 05:20:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:35,448 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 05:20:35,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:35,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066605314] [2021-06-05 05:20:35,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066605314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:35,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154283659] [2021-06-05 05:20:35,449 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 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 05:20:35,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:20:35,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:35,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:20:35,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:35,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:35,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:35,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:20:35,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:35,626 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 05:20:35,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:35,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:35,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:35,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:38 [2021-06-05 05:20:35,829 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 05:20:35,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154283659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:35,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:35,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:20:35,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932648191] [2021-06-05 05:20:35,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:20:35,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:35,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:20:35,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:20:35,830 INFO L87 Difference]: Start difference. First operand 9924 states and 44786 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:36,894 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-05 05:20:37,187 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 05:20:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:38,852 INFO L93 Difference]: Finished difference Result 10940 states and 48628 transitions. [2021-06-05 05:20:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:20:38,852 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:38,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:38,878 INFO L225 Difference]: With dead ends: 10940 [2021-06-05 05:20:38,878 INFO L226 Difference]: Without dead ends: 10894 [2021-06-05 05:20:38,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 2732.3ms TimeCoverageRelationStatistics Valid=541, Invalid=3119, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:20:38,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10894 states. [2021-06-05 05:20:39,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10894 to 9915. [2021-06-05 05:20:39,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9915 states, 9914 states have (on average 4.514424046802501) internal successors, (44756), 9914 states have internal predecessors, (44756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9915 states to 9915 states and 44756 transitions. [2021-06-05 05:20:39,051 INFO L78 Accepts]: Start accepts. Automaton has 9915 states and 44756 transitions. Word has length 33 [2021-06-05 05:20:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:39,051 INFO L482 AbstractCegarLoop]: Abstraction has 9915 states and 44756 transitions. [2021-06-05 05:20:39,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:39,051 INFO L276 IsEmpty]: Start isEmpty. Operand 9915 states and 44756 transitions. [2021-06-05 05:20:39,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:39,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:39,069 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, 1, 1, 1] [2021-06-05 05:20:39,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:39,269 INFO L430 AbstractCegarLoop]: === Iteration 283 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:39,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:39,269 INFO L82 PathProgramCache]: Analyzing trace with hash -118667836, now seen corresponding path program 202 times [2021-06-05 05:20:39,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:39,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261151193] [2021-06-05 05:20:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:39,621 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 05:20:39,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:39,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261151193] [2021-06-05 05:20:39,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261151193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:39,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971890839] [2021-06-05 05:20:39,621 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 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 05:20:39,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:39,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:39,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:39,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:39,804 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 05:20:39,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:39,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:39,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:39,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 05:20:39,902 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 05:20:39,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971890839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:39,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:39,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:20:39,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076954614] [2021-06-05 05:20:39,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:20:39,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:39,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:20:39,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:20:39,902 INFO L87 Difference]: Start difference. First operand 9915 states and 44756 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:42,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:42,189 INFO L93 Difference]: Finished difference Result 10942 states and 48596 transitions. [2021-06-05 05:20:42,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:20:42,190 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:42,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:42,214 INFO L225 Difference]: With dead ends: 10942 [2021-06-05 05:20:42,215 INFO L226 Difference]: Without dead ends: 10876 [2021-06-05 05:20:42,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 2133.4ms TimeCoverageRelationStatistics Valid=591, Invalid=2949, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:20:42,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10876 states. [2021-06-05 05:20:42,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10876 to 9878. [2021-06-05 05:20:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9878 states, 9877 states have (on average 4.515541156221524) internal successors, (44600), 9877 states have internal predecessors, (44600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:42,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9878 states to 9878 states and 44600 transitions. [2021-06-05 05:20:42,391 INFO L78 Accepts]: Start accepts. Automaton has 9878 states and 44600 transitions. Word has length 33 [2021-06-05 05:20:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:42,391 INFO L482 AbstractCegarLoop]: Abstraction has 9878 states and 44600 transitions. [2021-06-05 05:20:42,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 9878 states and 44600 transitions. [2021-06-05 05:20:42,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:42,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:42,407 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, 1, 1, 1] [2021-06-05 05:20:42,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 05:20:42,607 INFO L430 AbstractCegarLoop]: === Iteration 284 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:42,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1777252252, now seen corresponding path program 203 times [2021-06-05 05:20:42,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:42,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111904287] [2021-06-05 05:20:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:42,784 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 05:20:42,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:42,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111904287] [2021-06-05 05:20:42,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111904287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:42,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972335469] [2021-06-05 05:20:42,784 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 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 05:20:42,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:20:42,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:42,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:42,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:42,945 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 05:20:42,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:42,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:42,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:42,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 05:20:43,048 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 05:20:43,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972335469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:43,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:43,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:20:43,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238360358] [2021-06-05 05:20:43,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:43,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:43,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:43,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:43,049 INFO L87 Difference]: Start difference. First operand 9878 states and 44600 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:44,568 INFO L93 Difference]: Finished difference Result 10530 states and 47264 transitions. [2021-06-05 05:20:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:20:44,569 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:44,593 INFO L225 Difference]: With dead ends: 10530 [2021-06-05 05:20:44,593 INFO L226 Difference]: Without dead ends: 10478 [2021-06-05 05:20:44,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1403.5ms TimeCoverageRelationStatistics Valid=340, Invalid=1916, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:20:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10478 states. [2021-06-05 05:20:44,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10478 to 9863. [2021-06-05 05:20:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9863 states, 9862 states have (on average 4.517440681403366) internal successors, (44551), 9862 states have internal predecessors, (44551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9863 states to 9863 states and 44551 transitions. [2021-06-05 05:20:44,750 INFO L78 Accepts]: Start accepts. Automaton has 9863 states and 44551 transitions. Word has length 33 [2021-06-05 05:20:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:44,750 INFO L482 AbstractCegarLoop]: Abstraction has 9863 states and 44551 transitions. [2021-06-05 05:20:44,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 9863 states and 44551 transitions. [2021-06-05 05:20:44,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:44,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:44,766 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, 1, 1, 1] [2021-06-05 05:20:44,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:44,967 INFO L430 AbstractCegarLoop]: === Iteration 285 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:44,967 INFO L82 PathProgramCache]: Analyzing trace with hash -602166540, now seen corresponding path program 204 times [2021-06-05 05:20:44,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:44,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958516144] [2021-06-05 05:20:44,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:45,156 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 05:20:45,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:45,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958516144] [2021-06-05 05:20:45,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958516144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:45,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654031136] [2021-06-05 05:20:45,156 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 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 05:20:45,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:20:45,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:45,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:45,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:45,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:45,390 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:20:45,390 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 27 treesize of output 55 [2021-06-05 05:20:45,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:20:45,419 INFO L628 ElimStorePlain]: treesize reduction 67, result has 24.7 percent of original size [2021-06-05 05:20:45,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:45,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 05:20:45,553 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 05:20:45,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654031136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:45,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:45,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:20:45,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525593799] [2021-06-05 05:20:45,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:20:45,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:45,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:20:45,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:20:45,554 INFO L87 Difference]: Start difference. First operand 9863 states and 44551 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:47,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:47,261 INFO L93 Difference]: Finished difference Result 10918 states and 48527 transitions. [2021-06-05 05:20:47,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:20:47,262 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:47,287 INFO L225 Difference]: With dead ends: 10918 [2021-06-05 05:20:47,287 INFO L226 Difference]: Without dead ends: 10887 [2021-06-05 05:20:47,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1353.5ms TimeCoverageRelationStatistics Valid=315, Invalid=2441, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:20:47,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10887 states. [2021-06-05 05:20:47,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10887 to 9954. [2021-06-05 05:20:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9954 states, 9953 states have (on average 4.517532402290767) internal successors, (44963), 9953 states have internal predecessors, (44963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9954 states to 9954 states and 44963 transitions. [2021-06-05 05:20:47,459 INFO L78 Accepts]: Start accepts. Automaton has 9954 states and 44963 transitions. Word has length 33 [2021-06-05 05:20:47,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:47,459 INFO L482 AbstractCegarLoop]: Abstraction has 9954 states and 44963 transitions. [2021-06-05 05:20:47,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:47,459 INFO L276 IsEmpty]: Start isEmpty. Operand 9954 states and 44963 transitions. [2021-06-05 05:20:47,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:47,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:47,477 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, 1, 1, 1] [2021-06-05 05:20:47,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 05:20:47,677 INFO L430 AbstractCegarLoop]: === Iteration 286 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:47,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:47,677 INFO L82 PathProgramCache]: Analyzing trace with hash 701106066, now seen corresponding path program 205 times [2021-06-05 05:20:47,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:47,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137484920] [2021-06-05 05:20:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:47,863 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 05:20:47,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:47,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137484920] [2021-06-05 05:20:47,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137484920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:47,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861903311] [2021-06-05 05:20:47,863 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 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 05:20:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:47,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:47,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:48,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:48,049 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 28 treesize of output 12 [2021-06-05 05:20:48,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:48,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:48,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:48,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:20:48,130 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 05:20:48,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861903311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:48,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:48,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:20:48,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530662667] [2021-06-05 05:20:48,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:20:48,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:48,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:20:48,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:20:48,131 INFO L87 Difference]: Start difference. First operand 9954 states and 44963 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:49,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:49,522 INFO L93 Difference]: Finished difference Result 11352 states and 50202 transitions. [2021-06-05 05:20:49,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:20:49,522 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:49,548 INFO L225 Difference]: With dead ends: 11352 [2021-06-05 05:20:49,548 INFO L226 Difference]: Without dead ends: 11320 [2021-06-05 05:20:49,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1073.7ms TimeCoverageRelationStatistics Valid=363, Invalid=2087, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:20:49,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11320 states. [2021-06-05 05:20:49,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11320 to 10028. [2021-06-05 05:20:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10028 states, 10027 states have (on average 4.520394933679066) internal successors, (45326), 10027 states have internal predecessors, (45326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:49,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10028 states to 10028 states and 45326 transitions. [2021-06-05 05:20:49,717 INFO L78 Accepts]: Start accepts. Automaton has 10028 states and 45326 transitions. Word has length 33 [2021-06-05 05:20:49,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:49,717 INFO L482 AbstractCegarLoop]: Abstraction has 10028 states and 45326 transitions. [2021-06-05 05:20:49,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 10028 states and 45326 transitions. [2021-06-05 05:20:49,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:49,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:49,733 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, 1, 1, 1] [2021-06-05 05:20:49,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:49,933 INFO L430 AbstractCegarLoop]: === Iteration 287 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:49,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:49,934 INFO L82 PathProgramCache]: Analyzing trace with hash -967287376, now seen corresponding path program 206 times [2021-06-05 05:20:49,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:49,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702761116] [2021-06-05 05:20:49,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:50,102 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 05:20:50,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:50,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702761116] [2021-06-05 05:20:50,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702761116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:50,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085041480] [2021-06-05 05:20:50,103 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 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 05:20:50,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:50,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:50,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:50,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:50,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:50,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:20:50,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:50,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:50,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:50,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 05:20:50,484 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 05:20:50,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085041480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:50,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:50,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:20:50,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393264943] [2021-06-05 05:20:50,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:20:50,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:50,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:20:50,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:20:50,485 INFO L87 Difference]: Start difference. First operand 10028 states and 45326 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 05:20:51,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:51,821 INFO L93 Difference]: Finished difference Result 10881 states and 48527 transitions. [2021-06-05 05:20:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:20:51,822 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 05:20:51,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:51,846 INFO L225 Difference]: With dead ends: 10881 [2021-06-05 05:20:51,846 INFO L226 Difference]: Without dead ends: 10863 [2021-06-05 05:20:51,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1176.9ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:20:51,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10863 states. [2021-06-05 05:20:51,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10863 to 10024. [2021-06-05 05:20:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10024 states, 10023 states have (on average 4.5208021550434) internal successors, (45312), 10023 states have internal predecessors, (45312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 45312 transitions. [2021-06-05 05:20:52,010 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 45312 transitions. Word has length 33 [2021-06-05 05:20:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:52,010 INFO L482 AbstractCegarLoop]: Abstraction has 10024 states and 45312 transitions. [2021-06-05 05:20:52,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 05:20:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 45312 transitions. [2021-06-05 05:20:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:52,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:52,027 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, 1, 1, 1] [2021-06-05 05:20:52,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 05:20:52,227 INFO L430 AbstractCegarLoop]: === Iteration 288 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:52,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:52,227 INFO L82 PathProgramCache]: Analyzing trace with hash 647719546, now seen corresponding path program 207 times [2021-06-05 05:20:52,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:52,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721208671] [2021-06-05 05:20:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:52,460 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 05:20:52,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:52,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721208671] [2021-06-05 05:20:52,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721208671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:52,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163293864] [2021-06-05 05:20:52,460 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 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 05:20:52,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:20:52,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:52,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:52,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:52,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:52,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-06-05 05:20:52,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:52,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:52,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:52,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-05 05:20:52,833 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 05:20:52,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163293864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:52,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:52,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:20:52,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466619402] [2021-06-05 05:20:52,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:20:52,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:52,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:20:52,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:20:52,834 INFO L87 Difference]: Start difference. First operand 10024 states and 45312 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 05:20:52,968 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-06-05 05:20:53,188 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-06-05 05:20:53,900 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 05:20:55,769 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 05:20:56,107 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 05:20:56,282 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 05:20:56,466 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-05 05:20:56,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:56,686 INFO L93 Difference]: Finished difference Result 12059 states and 52103 transitions. [2021-06-05 05:20:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:20:56,686 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 05:20:56,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:56,713 INFO L225 Difference]: With dead ends: 12059 [2021-06-05 05:20:56,713 INFO L226 Difference]: Without dead ends: 11998 [2021-06-05 05:20:56,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 3298.5ms TimeCoverageRelationStatistics Valid=668, Invalid=3888, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:20:56,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11998 states. [2021-06-05 05:20:56,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11998 to 9947. [2021-06-05 05:20:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9947 states, 9946 states have (on average 4.520108586366378) internal successors, (44957), 9946 states have internal predecessors, (44957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9947 states to 9947 states and 44957 transitions. [2021-06-05 05:20:56,903 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 44957 transitions. Word has length 33 [2021-06-05 05:20:56,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:56,903 INFO L482 AbstractCegarLoop]: Abstraction has 9947 states and 44957 transitions. [2021-06-05 05:20:56,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 05:20:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 44957 transitions. [2021-06-05 05:20:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:56,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:56,919 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, 1, 1, 1] [2021-06-05 05:20:57,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 05:20:57,120 INFO L430 AbstractCegarLoop]: === Iteration 289 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:57,120 INFO L82 PathProgramCache]: Analyzing trace with hash -82934220, now seen corresponding path program 208 times [2021-06-05 05:20:57,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:57,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105021521] [2021-06-05 05:20:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:57,294 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 05:20:57,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:57,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105021521] [2021-06-05 05:20:57,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105021521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:57,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192950809] [2021-06-05 05:20:57,295 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 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 05:20:57,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:57,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:57,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:20:57,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:57,495 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 05:20:57,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:57,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:57,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:57,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:20:57,582 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 05:20:57,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192950809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:57,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:57,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:20:57,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581082587] [2021-06-05 05:20:57,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:57,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:57,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:57,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:57,583 INFO L87 Difference]: Start difference. First operand 9947 states and 44957 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:59,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:59,414 INFO L93 Difference]: Finished difference Result 10698 states and 47935 transitions. [2021-06-05 05:20:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:20:59,414 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:20:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:59,439 INFO L225 Difference]: With dead ends: 10698 [2021-06-05 05:20:59,439 INFO L226 Difference]: Without dead ends: 10658 [2021-06-05 05:20:59,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1433.0ms TimeCoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:20:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10658 states. [2021-06-05 05:20:59,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10658 to 9950. [2021-06-05 05:20:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9950 states, 9949 states have (on average 4.519348678259122) internal successors, (44963), 9949 states have internal predecessors, (44963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9950 states to 9950 states and 44963 transitions. [2021-06-05 05:20:59,668 INFO L78 Accepts]: Start accepts. Automaton has 9950 states and 44963 transitions. Word has length 33 [2021-06-05 05:20:59,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:59,668 INFO L482 AbstractCegarLoop]: Abstraction has 9950 states and 44963 transitions. [2021-06-05 05:20:59,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:59,668 INFO L276 IsEmpty]: Start isEmpty. Operand 9950 states and 44963 transitions. [2021-06-05 05:20:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:20:59,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:59,685 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, 1, 1, 1] [2021-06-05 05:20:59,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:59,886 INFO L430 AbstractCegarLoop]: === Iteration 290 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:59,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:59,886 INFO L82 PathProgramCache]: Analyzing trace with hash -646531644, now seen corresponding path program 209 times [2021-06-05 05:20:59,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:59,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088548959] [2021-06-05 05:20:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:00,060 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 05:21:00,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:00,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088548959] [2021-06-05 05:21:00,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088548959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:00,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788704586] [2021-06-05 05:21:00,061 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 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 05:21:00,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:21:00,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:00,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:00,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:00,249 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 28 treesize of output 12 [2021-06-05 05:21:00,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:00,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:00,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:00,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:21:00,327 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 05:21:00,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788704586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:00,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:00,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:21:00,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041630344] [2021-06-05 05:21:00,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:00,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:00,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:00,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:00,329 INFO L87 Difference]: Start difference. First operand 9950 states and 44963 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:02,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:02,127 INFO L93 Difference]: Finished difference Result 11313 states and 50203 transitions. [2021-06-05 05:21:02,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:21:02,127 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:02,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:02,152 INFO L225 Difference]: With dead ends: 11313 [2021-06-05 05:21:02,153 INFO L226 Difference]: Without dead ends: 11231 [2021-06-05 05:21:02,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1446.8ms TimeCoverageRelationStatistics Valid=376, Invalid=2594, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:21:02,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11231 states. [2021-06-05 05:21:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11231 to 9959. [2021-06-05 05:21:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9959 states, 9958 states have (on average 4.519783088973689) internal successors, (45008), 9958 states have internal predecessors, (45008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9959 states to 9959 states and 45008 transitions. [2021-06-05 05:21:02,337 INFO L78 Accepts]: Start accepts. Automaton has 9959 states and 45008 transitions. Word has length 33 [2021-06-05 05:21:02,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:02,337 INFO L482 AbstractCegarLoop]: Abstraction has 9959 states and 45008 transitions. [2021-06-05 05:21:02,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 9959 states and 45008 transitions. [2021-06-05 05:21:02,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:02,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:02,353 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, 1, 1, 1] [2021-06-05 05:21:02,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-05 05:21:02,554 INFO L430 AbstractCegarLoop]: === Iteration 291 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:02,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:02,554 INFO L82 PathProgramCache]: Analyzing trace with hash -326850790, now seen corresponding path program 210 times [2021-06-05 05:21:02,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:02,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064225539] [2021-06-05 05:21:02,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:02,731 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 05:21:02,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:02,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064225539] [2021-06-05 05:21:02,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064225539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:02,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638351958] [2021-06-05 05:21:02,732 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 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 05:21:02,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:21:02,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:02,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:02,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:03,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:03,041 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:21:03,042 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 33 treesize of output 61 [2021-06-05 05:21:03,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:21:03,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:03,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:03,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-06-05 05:21:03,140 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 05:21:03,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638351958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:03,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:03,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:21:03,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049396221] [2021-06-05 05:21:03,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:21:03,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:03,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:21:03,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:21:03,141 INFO L87 Difference]: Start difference. First operand 9959 states and 45008 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:04,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:04,504 INFO L93 Difference]: Finished difference Result 10540 states and 47204 transitions. [2021-06-05 05:21:04,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:21:04,504 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:04,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:04,529 INFO L225 Difference]: With dead ends: 10540 [2021-06-05 05:21:04,530 INFO L226 Difference]: Without dead ends: 10486 [2021-06-05 05:21:04,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1125.3ms TimeCoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:21:04,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10486 states. [2021-06-05 05:21:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10486 to 9944. [2021-06-05 05:21:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9944 states, 9943 states have (on average 4.5209695262999094) internal successors, (44952), 9943 states have internal predecessors, (44952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:04,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9944 states to 9944 states and 44952 transitions. [2021-06-05 05:21:04,753 INFO L78 Accepts]: Start accepts. Automaton has 9944 states and 44952 transitions. Word has length 33 [2021-06-05 05:21:04,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:04,753 INFO L482 AbstractCegarLoop]: Abstraction has 9944 states and 44952 transitions. [2021-06-05 05:21:04,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:04,754 INFO L276 IsEmpty]: Start isEmpty. Operand 9944 states and 44952 transitions. [2021-06-05 05:21:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:04,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:04,770 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, 1, 1, 1] [2021-06-05 05:21:04,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:04,970 INFO L430 AbstractCegarLoop]: === Iteration 292 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:04,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:04,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1708994490, now seen corresponding path program 211 times [2021-06-05 05:21:04,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:04,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611800784] [2021-06-05 05:21:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:05,155 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 05:21:05,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:05,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611800784] [2021-06-05 05:21:05,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611800784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:05,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537936002] [2021-06-05 05:21:05,156 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 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 05:21:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:05,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:05,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:05,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:05,347 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 28 treesize of output 12 [2021-06-05 05:21:05,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:05,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:05,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:05,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:21:05,428 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 05:21:05,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537936002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:05,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:05,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:21:05,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145655423] [2021-06-05 05:21:05,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:05,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:05,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:05,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:05,429 INFO L87 Difference]: Start difference. First operand 9944 states and 44952 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:07,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:07,400 INFO L93 Difference]: Finished difference Result 11135 states and 49694 transitions. [2021-06-05 05:21:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:21:07,400 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:07,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:07,426 INFO L225 Difference]: With dead ends: 11135 [2021-06-05 05:21:07,426 INFO L226 Difference]: Without dead ends: 11104 [2021-06-05 05:21:07,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1586.5ms TimeCoverageRelationStatistics Valid=398, Invalid=2572, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:21:07,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11104 states. [2021-06-05 05:21:07,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11104 to 10062. [2021-06-05 05:21:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10062 states, 10061 states have (on average 4.520922373521519) internal successors, (45485), 10061 states have internal predecessors, (45485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10062 states to 10062 states and 45485 transitions. [2021-06-05 05:21:07,602 INFO L78 Accepts]: Start accepts. Automaton has 10062 states and 45485 transitions. Word has length 33 [2021-06-05 05:21:07,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:07,602 INFO L482 AbstractCegarLoop]: Abstraction has 10062 states and 45485 transitions. [2021-06-05 05:21:07,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:07,602 INFO L276 IsEmpty]: Start isEmpty. Operand 10062 states and 45485 transitions. [2021-06-05 05:21:07,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:07,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:07,619 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, 1, 1, 1] [2021-06-05 05:21:07,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 05:21:07,819 INFO L430 AbstractCegarLoop]: === Iteration 293 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:07,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:07,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1282700200, now seen corresponding path program 212 times [2021-06-05 05:21:07,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:07,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876960522] [2021-06-05 05:21:07,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:07,994 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 05:21:07,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:07,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876960522] [2021-06-05 05:21:07,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876960522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:07,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142311311] [2021-06-05 05:21:07,995 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 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 05:21:08,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:08,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:08,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:08,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:08,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:08,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-06-05 05:21:08,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:08,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:08,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:08,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-05 05:21:08,379 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 05:21:08,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142311311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:08,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:08,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:21:08,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609782336] [2021-06-05 05:21:08,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:21:08,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:08,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:21:08,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:21:08,380 INFO L87 Difference]: Start difference. First operand 10062 states and 45485 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:09,691 INFO L93 Difference]: Finished difference Result 10694 states and 47758 transitions. [2021-06-05 05:21:09,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:21:09,692 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:09,716 INFO L225 Difference]: With dead ends: 10694 [2021-06-05 05:21:09,716 INFO L226 Difference]: Without dead ends: 10677 [2021-06-05 05:21:09,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1061.3ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:21:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2021-06-05 05:21:09,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 10062. [2021-06-05 05:21:09,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10062 states, 10061 states have (on average 4.520226617632442) internal successors, (45478), 10061 states have internal predecessors, (45478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10062 states to 10062 states and 45478 transitions. [2021-06-05 05:21:09,879 INFO L78 Accepts]: Start accepts. Automaton has 10062 states and 45478 transitions. Word has length 33 [2021-06-05 05:21:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:09,879 INFO L482 AbstractCegarLoop]: Abstraction has 10062 states and 45478 transitions. [2021-06-05 05:21:09,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 10062 states and 45478 transitions. [2021-06-05 05:21:09,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:09,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:09,896 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, 1, 1, 1] [2021-06-05 05:21:10,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 05:21:10,096 INFO L430 AbstractCegarLoop]: === Iteration 294 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:10,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:10,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2112905024, now seen corresponding path program 213 times [2021-06-05 05:21:10,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:10,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566855074] [2021-06-05 05:21:10,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:10,339 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 05:21:10,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:10,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566855074] [2021-06-05 05:21:10,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566855074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:10,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142806245] [2021-06-05 05:21:10,339 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 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 05:21:10,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:21:10,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:10,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:10,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:10,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:10,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:21:10,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:10,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:10,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:10,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 05:21:10,735 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 05:21:10,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142806245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:10,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:10,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:21:10,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145220575] [2021-06-05 05:21:10,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:21:10,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:10,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:21:10,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:21:10,736 INFO L87 Difference]: Start difference. First operand 10062 states and 45478 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:10,879 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-06-05 05:21:11,109 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2021-06-05 05:21:11,644 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 05:21:11,875 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-06-05 05:21:13,794 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-06-05 05:21:14,068 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-05 05:21:14,266 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-05 05:21:14,457 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-06-05 05:21:14,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:14,471 INFO L93 Difference]: Finished difference Result 11129 states and 49470 transitions. [2021-06-05 05:21:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:21:14,471 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:14,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:14,496 INFO L225 Difference]: With dead ends: 11129 [2021-06-05 05:21:14,496 INFO L226 Difference]: Without dead ends: 11106 [2021-06-05 05:21:14,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 3171.7ms TimeCoverageRelationStatistics Valid=494, Invalid=3288, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:21:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11106 states. [2021-06-05 05:21:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11106 to 10062. [2021-06-05 05:21:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10062 states, 10061 states have (on average 4.520226617632442) internal successors, (45478), 10061 states have internal predecessors, (45478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10062 states to 10062 states and 45478 transitions. [2021-06-05 05:21:14,773 INFO L78 Accepts]: Start accepts. Automaton has 10062 states and 45478 transitions. Word has length 33 [2021-06-05 05:21:14,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:14,773 INFO L482 AbstractCegarLoop]: Abstraction has 10062 states and 45478 transitions. [2021-06-05 05:21:14,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:14,773 INFO L276 IsEmpty]: Start isEmpty. Operand 10062 states and 45478 transitions. [2021-06-05 05:21:14,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:14,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:14,791 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, 1, 1, 1] [2021-06-05 05:21:14,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 05:21:14,991 INFO L430 AbstractCegarLoop]: === Iteration 295 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:14,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:14,992 INFO L82 PathProgramCache]: Analyzing trace with hash 332306722, now seen corresponding path program 214 times [2021-06-05 05:21:14,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:14,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890269210] [2021-06-05 05:21:14,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:15,230 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 05:21:15,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:15,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890269210] [2021-06-05 05:21:15,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890269210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:15,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175857412] [2021-06-05 05:21:15,230 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 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 05:21:15,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:15,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:15,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:15,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:15,404 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 05:21:15,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:15,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:15,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:15,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:21:15,495 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 05:21:15,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175857412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:15,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:15,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:21:15,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161227862] [2021-06-05 05:21:15,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:21:15,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:15,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:21:15,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:15,496 INFO L87 Difference]: Start difference. First operand 10062 states and 45478 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:15,702 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 05:21:16,519 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 05:21:16,716 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 05:21:17,003 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-05 05:21:18,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:18,234 INFO L93 Difference]: Finished difference Result 11241 states and 50036 transitions. [2021-06-05 05:21:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:21:18,234 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:18,260 INFO L225 Difference]: With dead ends: 11241 [2021-06-05 05:21:18,260 INFO L226 Difference]: Without dead ends: 11184 [2021-06-05 05:21:18,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 2436.8ms TimeCoverageRelationStatistics Valid=499, Invalid=2807, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:21:18,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11184 states. [2021-06-05 05:21:18,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11184 to 10016. [2021-06-05 05:21:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10016 states, 10015 states have (on average 4.52061907139291) internal successors, (45274), 10015 states have internal predecessors, (45274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:18,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10016 states to 10016 states and 45274 transitions. [2021-06-05 05:21:18,438 INFO L78 Accepts]: Start accepts. Automaton has 10016 states and 45274 transitions. Word has length 33 [2021-06-05 05:21:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:18,438 INFO L482 AbstractCegarLoop]: Abstraction has 10016 states and 45274 transitions. [2021-06-05 05:21:18,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:18,438 INFO L276 IsEmpty]: Start isEmpty. Operand 10016 states and 45274 transitions. [2021-06-05 05:21:18,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:18,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:18,455 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, 1, 1, 1] [2021-06-05 05:21:18,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:18,655 INFO L430 AbstractCegarLoop]: === Iteration 296 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:18,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:18,655 INFO L82 PathProgramCache]: Analyzing trace with hash -2066740486, now seen corresponding path program 215 times [2021-06-05 05:21:18,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:18,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912417458] [2021-06-05 05:21:18,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:18,840 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 05:21:18,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:18,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912417458] [2021-06-05 05:21:18,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912417458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:18,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845231613] [2021-06-05 05:21:18,840 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 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 05:21:18,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:21:18,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:18,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:18,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:19,035 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 05:21:19,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:19,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:19,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:19,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:21:19,117 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 05:21:19,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845231613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:19,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:19,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:21:19,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728776494] [2021-06-05 05:21:19,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:19,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:19,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:19,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:19,118 INFO L87 Difference]: Start difference. First operand 10016 states and 45274 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:21,064 INFO L93 Difference]: Finished difference Result 10688 states and 47966 transitions. [2021-06-05 05:21:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:21:21,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:21,089 INFO L225 Difference]: With dead ends: 10688 [2021-06-05 05:21:21,089 INFO L226 Difference]: Without dead ends: 10636 [2021-06-05 05:21:21,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1624.1ms TimeCoverageRelationStatistics Valid=344, Invalid=2308, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:21:21,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10636 states. [2021-06-05 05:21:21,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10636 to 9992. [2021-06-05 05:21:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9992 states, 9991 states have (on average 4.520868781903713) internal successors, (45168), 9991 states have internal predecessors, (45168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:21,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9992 states to 9992 states and 45168 transitions. [2021-06-05 05:21:21,257 INFO L78 Accepts]: Start accepts. Automaton has 9992 states and 45168 transitions. Word has length 33 [2021-06-05 05:21:21,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:21,257 INFO L482 AbstractCegarLoop]: Abstraction has 9992 states and 45168 transitions. [2021-06-05 05:21:21,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:21,257 INFO L276 IsEmpty]: Start isEmpty. Operand 9992 states and 45168 transitions. [2021-06-05 05:21:21,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:21,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:21,273 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, 1, 1, 1] [2021-06-05 05:21:21,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 05:21:21,474 INFO L430 AbstractCegarLoop]: === Iteration 297 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:21,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:21,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1984310240, now seen corresponding path program 216 times [2021-06-05 05:21:21,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:21,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79805545] [2021-06-05 05:21:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:21,655 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 05:21:21,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:21,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79805545] [2021-06-05 05:21:21,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79805545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:21,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139198856] [2021-06-05 05:21:21,656 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 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 05:21:21,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:21:21,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:21,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:21,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:21,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:21,976 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:21:21,976 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 33 treesize of output 61 [2021-06-05 05:21:21,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:21:22,000 INFO L628 ElimStorePlain]: treesize reduction 52, result has 29.7 percent of original size [2021-06-05 05:21:22,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:22,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-06-05 05:21:22,092 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 05:21:22,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139198856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:22,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:22,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:21:22,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501236815] [2021-06-05 05:21:22,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:21:22,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:22,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:21:22,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:21:22,093 INFO L87 Difference]: Start difference. First operand 9992 states and 45168 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:23,617 INFO L93 Difference]: Finished difference Result 10575 states and 47307 transitions. [2021-06-05 05:21:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:21:23,617 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:23,642 INFO L225 Difference]: With dead ends: 10575 [2021-06-05 05:21:23,642 INFO L226 Difference]: Without dead ends: 10521 [2021-06-05 05:21:23,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1159.2ms TimeCoverageRelationStatistics Valid=181, Invalid=1889, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:21:23,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10521 states. [2021-06-05 05:21:23,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10521 to 9971. [2021-06-05 05:21:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9971 states, 9970 states have (on average 4.519959879638916) internal successors, (45064), 9970 states have internal predecessors, (45064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:23,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9971 states to 9971 states and 45064 transitions. [2021-06-05 05:21:23,809 INFO L78 Accepts]: Start accepts. Automaton has 9971 states and 45064 transitions. Word has length 33 [2021-06-05 05:21:23,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:23,809 INFO L482 AbstractCegarLoop]: Abstraction has 9971 states and 45064 transitions. [2021-06-05 05:21:23,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:23,809 INFO L276 IsEmpty]: Start isEmpty. Operand 9971 states and 45064 transitions. [2021-06-05 05:21:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:23,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:23,826 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, 1, 1, 1] [2021-06-05 05:21:24,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:24,027 INFO L430 AbstractCegarLoop]: === Iteration 298 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:24,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:24,027 INFO L82 PathProgramCache]: Analyzing trace with hash -155981062, now seen corresponding path program 217 times [2021-06-05 05:21:24,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:24,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807006435] [2021-06-05 05:21:24,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:24,210 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 05:21:24,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:24,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807006435] [2021-06-05 05:21:24,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807006435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:24,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725836717] [2021-06-05 05:21:24,210 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 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 05:21:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:24,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:24,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:24,442 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 05:21:24,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:24,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:24,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:24,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:21:24,501 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 05:21:24,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725836717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:24,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:24,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:21:24,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392869264] [2021-06-05 05:21:24,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:24,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:24,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:24,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:24,501 INFO L87 Difference]: Start difference. First operand 9971 states and 45064 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:26,008 INFO L93 Difference]: Finished difference Result 10401 states and 46786 transitions. [2021-06-05 05:21:26,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:21:26,008 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:26,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:26,032 INFO L225 Difference]: With dead ends: 10401 [2021-06-05 05:21:26,032 INFO L226 Difference]: Without dead ends: 10349 [2021-06-05 05:21:26,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1156.0ms TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:21:26,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10349 states. [2021-06-05 05:21:26,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10349 to 9971. [2021-06-05 05:21:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9971 states, 9970 states have (on average 4.519759277833501) internal successors, (45062), 9970 states have internal predecessors, (45062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9971 states to 9971 states and 45062 transitions. [2021-06-05 05:21:26,200 INFO L78 Accepts]: Start accepts. Automaton has 9971 states and 45062 transitions. Word has length 33 [2021-06-05 05:21:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:26,200 INFO L482 AbstractCegarLoop]: Abstraction has 9971 states and 45062 transitions. [2021-06-05 05:21:26,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 9971 states and 45062 transitions. [2021-06-05 05:21:26,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:26,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:26,217 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, 1, 1, 1] [2021-06-05 05:21:26,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 05:21:26,417 INFO L430 AbstractCegarLoop]: === Iteration 299 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:26,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:26,417 INFO L82 PathProgramCache]: Analyzing trace with hash -607226230, now seen corresponding path program 218 times [2021-06-05 05:21:26,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:26,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528322881] [2021-06-05 05:21:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:26,598 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 05:21:26,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:26,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528322881] [2021-06-05 05:21:26,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528322881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:26,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706960786] [2021-06-05 05:21:26,598 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 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 05:21:26,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:26,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:26,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:26,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:26,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:26,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:21:26,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:26,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:26,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:26,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 05:21:26,973 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 05:21:26,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706960786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:26,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:26,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:21:26,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573254952] [2021-06-05 05:21:26,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:21:26,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:26,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:21:26,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:21:26,974 INFO L87 Difference]: Start difference. First operand 9971 states and 45062 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:28,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:28,128 INFO L93 Difference]: Finished difference Result 10564 states and 47382 transitions. [2021-06-05 05:21:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:21:28,128 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:28,152 INFO L225 Difference]: With dead ends: 10564 [2021-06-05 05:21:28,153 INFO L226 Difference]: Without dead ends: 10508 [2021-06-05 05:21:28,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 928.4ms TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:21:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10508 states. [2021-06-05 05:21:28,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10508 to 9944. [2021-06-05 05:21:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9944 states, 9943 states have (on average 4.5209695262999094) internal successors, (44952), 9943 states have internal predecessors, (44952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9944 states to 9944 states and 44952 transitions. [2021-06-05 05:21:28,315 INFO L78 Accepts]: Start accepts. Automaton has 9944 states and 44952 transitions. Word has length 33 [2021-06-05 05:21:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:28,315 INFO L482 AbstractCegarLoop]: Abstraction has 9944 states and 44952 transitions. [2021-06-05 05:21:28,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 9944 states and 44952 transitions. [2021-06-05 05:21:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:28,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:28,331 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, 1, 1, 1] [2021-06-05 05:21:28,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 05:21:28,531 INFO L430 AbstractCegarLoop]: === Iteration 300 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:28,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1400551568, now seen corresponding path program 219 times [2021-06-05 05:21:28,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:28,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182290603] [2021-06-05 05:21:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:28,763 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 05:21:28,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:28,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182290603] [2021-06-05 05:21:28,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182290603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:28,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002525566] [2021-06-05 05:21:28,763 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 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 05:21:28,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:21:28,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:28,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:21:28,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:28,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:28,953 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 05:21:28,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:28,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:28,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:28,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-05 05:21:29,107 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 05:21:29,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002525566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:29,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:29,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:21:29,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835493451] [2021-06-05 05:21:29,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:21:29,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:29,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:21:29,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:21:29,108 INFO L87 Difference]: Start difference. First operand 9944 states and 44952 transitions. Second operand has 25 states, 25 states have (on average 2.04) 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 05:21:30,077 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-06-05 05:21:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:31,137 INFO L93 Difference]: Finished difference Result 10784 states and 48281 transitions. [2021-06-05 05:21:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:21:31,137 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) 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 33 [2021-06-05 05:21:31,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:31,162 INFO L225 Difference]: With dead ends: 10784 [2021-06-05 05:21:31,162 INFO L226 Difference]: Without dead ends: 10765 [2021-06-05 05:21:31,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1683.7ms TimeCoverageRelationStatistics Valid=281, Invalid=2071, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:21:31,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10765 states. [2021-06-05 05:21:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10765 to 10134. [2021-06-05 05:21:31,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10134 states, 10133 states have (on average 4.524129083193526) internal successors, (45843), 10133 states have internal predecessors, (45843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10134 states to 10134 states and 45843 transitions. [2021-06-05 05:21:31,348 INFO L78 Accepts]: Start accepts. Automaton has 10134 states and 45843 transitions. Word has length 33 [2021-06-05 05:21:31,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:31,348 INFO L482 AbstractCegarLoop]: Abstraction has 10134 states and 45843 transitions. [2021-06-05 05:21:31,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) 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 05:21:31,348 INFO L276 IsEmpty]: Start isEmpty. Operand 10134 states and 45843 transitions. [2021-06-05 05:21:31,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:31,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:31,365 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, 1, 1, 1] [2021-06-05 05:21:31,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 05:21:31,565 INFO L430 AbstractCegarLoop]: === Iteration 301 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:31,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:31,566 INFO L82 PathProgramCache]: Analyzing trace with hash -97278962, now seen corresponding path program 220 times [2021-06-05 05:21:31,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:31,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18195727] [2021-06-05 05:21:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:31,779 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 05:21:31,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:31,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18195727] [2021-06-05 05:21:31,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18195727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:31,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507521991] [2021-06-05 05:21:31,779 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 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 05:21:31,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:31,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:31,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:31,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:31,942 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 05:21:31,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:31,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:31,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:31,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:21:32,026 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 05:21:32,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507521991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:32,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:32,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:21:32,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205071565] [2021-06-05 05:21:32,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:32,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:32,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:32,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:32,027 INFO L87 Difference]: Start difference. First operand 10134 states and 45843 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:21:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:33,503 INFO L93 Difference]: Finished difference Result 11552 states and 50988 transitions. [2021-06-05 05:21:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:21:33,504 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:21:33,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:33,531 INFO L225 Difference]: With dead ends: 11552 [2021-06-05 05:21:33,531 INFO L226 Difference]: Without dead ends: 11537 [2021-06-05 05:21:33,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1156.6ms TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:21:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11537 states. [2021-06-05 05:21:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11537 to 10153. [2021-06-05 05:21:33,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10153 states, 10152 states have (on average 4.522163120567376) internal successors, (45909), 10152 states have internal predecessors, (45909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10153 states to 10153 states and 45909 transitions. [2021-06-05 05:21:33,726 INFO L78 Accepts]: Start accepts. Automaton has 10153 states and 45909 transitions. Word has length 33 [2021-06-05 05:21:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:33,726 INFO L482 AbstractCegarLoop]: Abstraction has 10153 states and 45909 transitions. [2021-06-05 05:21:33,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:21:33,726 INFO L276 IsEmpty]: Start isEmpty. Operand 10153 states and 45909 transitions. [2021-06-05 05:21:33,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:33,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:33,743 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, 1, 1, 1] [2021-06-05 05:21:33,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:33,943 INFO L430 AbstractCegarLoop]: === Iteration 302 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:33,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:33,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1765672404, now seen corresponding path program 221 times [2021-06-05 05:21:33,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:33,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360050608] [2021-06-05 05:21:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:34,165 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 05:21:34,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:34,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360050608] [2021-06-05 05:21:34,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360050608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:34,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132643546] [2021-06-05 05:21:34,165 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 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 05:21:34,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:21:34,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:34,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:34,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:34,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:34,332 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 28 treesize of output 12 [2021-06-05 05:21:34,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:34,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:34,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:34,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:21:34,412 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 05:21:34,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132643546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:34,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:34,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:21:34,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15869173] [2021-06-05 05:21:34,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:34,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:34,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:34,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:34,413 INFO L87 Difference]: Start difference. First operand 10153 states and 45909 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 05:21:34,926 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 05:21:35,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:35,858 INFO L93 Difference]: Finished difference Result 11155 states and 49880 transitions. [2021-06-05 05:21:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:21:35,858 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 33 [2021-06-05 05:21:35,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:35,883 INFO L225 Difference]: With dead ends: 11155 [2021-06-05 05:21:35,883 INFO L226 Difference]: Without dead ends: 11129 [2021-06-05 05:21:35,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1132.7ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:21:35,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11129 states. [2021-06-05 05:21:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11129 to 10128. [2021-06-05 05:21:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10128 states, 10127 states have (on average 4.5223659524044635) internal successors, (45798), 10127 states have internal predecessors, (45798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:36,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10128 states to 10128 states and 45798 transitions. [2021-06-05 05:21:36,072 INFO L78 Accepts]: Start accepts. Automaton has 10128 states and 45798 transitions. Word has length 33 [2021-06-05 05:21:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:36,072 INFO L482 AbstractCegarLoop]: Abstraction has 10128 states and 45798 transitions. [2021-06-05 05:21:36,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 05:21:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 10128 states and 45798 transitions. [2021-06-05 05:21:36,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:36,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:36,090 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, 1, 1, 1] [2021-06-05 05:21:36,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 05:21:36,291 INFO L430 AbstractCegarLoop]: === Iteration 303 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:36,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:36,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1912163614, now seen corresponding path program 222 times [2021-06-05 05:21:36,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:36,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549089637] [2021-06-05 05:21:36,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:36,501 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 05:21:36,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:36,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549089637] [2021-06-05 05:21:36,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549089637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:36,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577124647] [2021-06-05 05:21:36,501 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 05:21:36,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:21:36,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:36,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:21:36,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:36,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:36,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:36,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:36,734 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 27 treesize of output 55 [2021-06-05 05:21:36,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:21:36,764 INFO L628 ElimStorePlain]: treesize reduction 65, result has 30.9 percent of original size [2021-06-05 05:21:36,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:36,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:29 [2021-06-05 05:21:36,938 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 05:21:36,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577124647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:36,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:36,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:21:36,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752580244] [2021-06-05 05:21:36,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:21:36,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:36,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:21:36,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:21:36,939 INFO L87 Difference]: Start difference. First operand 10128 states and 45798 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:39,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:39,498 INFO L93 Difference]: Finished difference Result 10963 states and 49059 transitions. [2021-06-05 05:21:39,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:21:39,499 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:39,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:39,524 INFO L225 Difference]: With dead ends: 10963 [2021-06-05 05:21:39,524 INFO L226 Difference]: Without dead ends: 10948 [2021-06-05 05:21:39,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 2003.6ms TimeCoverageRelationStatistics Valid=453, Invalid=3579, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:21:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10948 states. [2021-06-05 05:21:39,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10948 to 10116. [2021-06-05 05:21:39,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10116 states, 10115 states have (on average 4.52318339100346) internal successors, (45752), 10115 states have internal predecessors, (45752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10116 states to 10116 states and 45752 transitions. [2021-06-05 05:21:39,697 INFO L78 Accepts]: Start accepts. Automaton has 10116 states and 45752 transitions. Word has length 33 [2021-06-05 05:21:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:39,697 INFO L482 AbstractCegarLoop]: Abstraction has 10116 states and 45752 transitions. [2021-06-05 05:21:39,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:39,697 INFO L276 IsEmpty]: Start isEmpty. Operand 10116 states and 45752 transitions. [2021-06-05 05:21:39,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:39,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:39,714 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, 1, 1, 1] [2021-06-05 05:21:39,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:39,914 INFO L430 AbstractCegarLoop]: === Iteration 304 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:39,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:39,914 INFO L82 PathProgramCache]: Analyzing trace with hash -307347916, now seen corresponding path program 223 times [2021-06-05 05:21:39,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:39,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925212140] [2021-06-05 05:21:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:40,199 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 05:21:40,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:40,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925212140] [2021-06-05 05:21:40,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925212140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:40,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742055375] [2021-06-05 05:21:40,200 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 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 05:21:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:40,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:40,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:40,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:21:40,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:40,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:40,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:21:40,481 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 37 treesize of output 17 [2021-06-05 05:21:40,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:40,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:40,489 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 05:21:40,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:14 [2021-06-05 05:21:40,559 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 05:21:40,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742055375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:40,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:40,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:21:40,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840655179] [2021-06-05 05:21:40,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:40,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:40,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:40,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:40,560 INFO L87 Difference]: Start difference. First operand 10116 states and 45752 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:41,964 INFO L93 Difference]: Finished difference Result 10595 states and 47550 transitions. [2021-06-05 05:21:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:21:41,964 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:41,988 INFO L225 Difference]: With dead ends: 10595 [2021-06-05 05:21:41,988 INFO L226 Difference]: Without dead ends: 10580 [2021-06-05 05:21:41,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1009.1ms TimeCoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:21:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10580 states. [2021-06-05 05:21:42,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10580 to 10107. [2021-06-05 05:21:42,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10107 states, 10106 states have (on average 4.523946170591728) internal successors, (45719), 10106 states have internal predecessors, (45719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10107 states to 10107 states and 45719 transitions. [2021-06-05 05:21:42,160 INFO L78 Accepts]: Start accepts. Automaton has 10107 states and 45719 transitions. Word has length 33 [2021-06-05 05:21:42,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:42,160 INFO L482 AbstractCegarLoop]: Abstraction has 10107 states and 45719 transitions. [2021-06-05 05:21:42,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:42,160 INFO L276 IsEmpty]: Start isEmpty. Operand 10107 states and 45719 transitions. [2021-06-05 05:21:42,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:42,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:42,177 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, 1, 1, 1] [2021-06-05 05:21:42,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:42,378 INFO L430 AbstractCegarLoop]: === Iteration 305 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:42,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:42,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1616955588, now seen corresponding path program 224 times [2021-06-05 05:21:42,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:42,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934290485] [2021-06-05 05:21:42,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:42,582 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 05:21:42,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:42,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934290485] [2021-06-05 05:21:42,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934290485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:42,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536591964] [2021-06-05 05:21:42,583 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 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 05:21:42,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:42,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:42,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:21:42,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:42,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:42,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:42,806 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 35 treesize of output 35 [2021-06-05 05:21:42,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:21:42,841 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.6 percent of original size [2021-06-05 05:21:42,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:42,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:50 [2021-06-05 05:21:43,021 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 05:21:43,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536591964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:43,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:43,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:21:43,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028811338] [2021-06-05 05:21:43,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:21:43,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:43,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:21:43,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:43,022 INFO L87 Difference]: Start difference. First operand 10107 states and 45719 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:44,084 INFO L93 Difference]: Finished difference Result 10378 states and 46707 transitions. [2021-06-05 05:21:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:21:44,085 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:44,109 INFO L225 Difference]: With dead ends: 10378 [2021-06-05 05:21:44,109 INFO L226 Difference]: Without dead ends: 10363 [2021-06-05 05:21:44,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 938.1ms TimeCoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:21:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10363 states. [2021-06-05 05:21:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10363 to 10101. [2021-06-05 05:21:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10101 states, 10100 states have (on average 4.524455445544555) internal successors, (45697), 10100 states have internal predecessors, (45697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:44,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10101 states to 10101 states and 45697 transitions. [2021-06-05 05:21:44,272 INFO L78 Accepts]: Start accepts. Automaton has 10101 states and 45697 transitions. Word has length 33 [2021-06-05 05:21:44,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:44,272 INFO L482 AbstractCegarLoop]: Abstraction has 10101 states and 45697 transitions. [2021-06-05 05:21:44,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:44,272 INFO L276 IsEmpty]: Start isEmpty. Operand 10101 states and 45697 transitions. [2021-06-05 05:21:44,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:44,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:44,288 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, 1, 1, 1] [2021-06-05 05:21:44,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:44,489 INFO L430 AbstractCegarLoop]: === Iteration 306 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:44,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:44,489 INFO L82 PathProgramCache]: Analyzing trace with hash 31210194, now seen corresponding path program 225 times [2021-06-05 05:21:44,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:44,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846911113] [2021-06-05 05:21:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:44,703 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 05:21:44,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:44,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846911113] [2021-06-05 05:21:44,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846911113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:44,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570269304] [2021-06-05 05:21:44,704 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 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 05:21:44,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:21:44,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:44,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:44,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:44,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:44,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2021-06-05 05:21:44,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:45,004 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-06-05 05:21:45,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:45,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:45,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:53 [2021-06-05 05:21:45,234 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 05:21:45,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570269304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:45,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:45,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 05:21:45,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112624315] [2021-06-05 05:21:45,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:45,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:45,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:45,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:45,235 INFO L87 Difference]: Start difference. First operand 10101 states and 45697 transitions. Second operand has 22 states, 22 states have (on average 2.0) 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 05:21:46,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:46,564 INFO L93 Difference]: Finished difference Result 10611 states and 47735 transitions. [2021-06-05 05:21:46,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:21:46,564 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) 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 33 [2021-06-05 05:21:46,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:46,589 INFO L225 Difference]: With dead ends: 10611 [2021-06-05 05:21:46,589 INFO L226 Difference]: Without dead ends: 10596 [2021-06-05 05:21:46,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1313.8ms TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:21:46,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10596 states. [2021-06-05 05:21:46,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10596 to 10113. [2021-06-05 05:21:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10113 states, 10112 states have (on average 4.522250791139241) internal successors, (45729), 10112 states have internal predecessors, (45729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10113 states to 10113 states and 45729 transitions. [2021-06-05 05:21:46,755 INFO L78 Accepts]: Start accepts. Automaton has 10113 states and 45729 transitions. Word has length 33 [2021-06-05 05:21:46,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:46,755 INFO L482 AbstractCegarLoop]: Abstraction has 10113 states and 45729 transitions. [2021-06-05 05:21:46,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) 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 05:21:46,755 INFO L276 IsEmpty]: Start isEmpty. Operand 10113 states and 45729 transitions. [2021-06-05 05:21:46,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:46,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:46,772 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, 1, 1, 1] [2021-06-05 05:21:46,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 05:21:46,972 INFO L430 AbstractCegarLoop]: === Iteration 307 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash 521583988, now seen corresponding path program 226 times [2021-06-05 05:21:46,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:46,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533761328] [2021-06-05 05:21:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:47,222 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 05:21:47,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:47,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533761328] [2021-06-05 05:21:47,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533761328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:47,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940182575] [2021-06-05 05:21:47,223 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 05:21:47,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:47,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:47,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:47,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:47,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:21:47,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:47,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:47,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:21:47,542 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 37 treesize of output 17 [2021-06-05 05:21:47,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:47,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:47,550 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 05:21:47,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:14 [2021-06-05 05:21:47,622 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 05:21:47,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940182575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:47,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:47,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:21:47,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594843122] [2021-06-05 05:21:47,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:47,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:47,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:47,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:47,623 INFO L87 Difference]: Start difference. First operand 10113 states and 45729 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:48,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:48,916 INFO L93 Difference]: Finished difference Result 10440 states and 46923 transitions. [2021-06-05 05:21:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:21:48,917 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:48,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:48,940 INFO L225 Difference]: With dead ends: 10440 [2021-06-05 05:21:48,940 INFO L226 Difference]: Without dead ends: 10425 [2021-06-05 05:21:48,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1025.9ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:21:48,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10425 states. [2021-06-05 05:21:49,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10425 to 10110. [2021-06-05 05:21:49,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10110 states, 10109 states have (on average 4.522603620536156) internal successors, (45719), 10109 states have internal predecessors, (45719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:49,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10110 states to 10110 states and 45719 transitions. [2021-06-05 05:21:49,110 INFO L78 Accepts]: Start accepts. Automaton has 10110 states and 45719 transitions. Word has length 33 [2021-06-05 05:21:49,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:49,110 INFO L482 AbstractCegarLoop]: Abstraction has 10110 states and 45719 transitions. [2021-06-05 05:21:49,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:49,111 INFO L276 IsEmpty]: Start isEmpty. Operand 10110 states and 45719 transitions. [2021-06-05 05:21:49,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:49,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:49,127 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, 1, 1, 1] [2021-06-05 05:21:49,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 05:21:49,327 INFO L430 AbstractCegarLoop]: === Iteration 308 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:49,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:49,327 INFO L82 PathProgramCache]: Analyzing trace with hash -740889804, now seen corresponding path program 227 times [2021-06-05 05:21:49,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:49,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705003477] [2021-06-05 05:21:49,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:49,542 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 05:21:49,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:49,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705003477] [2021-06-05 05:21:49,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705003477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:49,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116187603] [2021-06-05 05:21:49,542 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 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 05:21:49,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:21:49,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:49,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:49,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:49,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:49,708 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 28 treesize of output 12 [2021-06-05 05:21:49,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:49,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:49,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:49,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 05:21:49,785 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 05:21:49,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116187603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:49,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:49,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:21:49,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227823717] [2021-06-05 05:21:49,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:49,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:49,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:49,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:49,786 INFO L87 Difference]: Start difference. First operand 10110 states and 45719 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:21:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:52,167 INFO L93 Difference]: Finished difference Result 12090 states and 53145 transitions. [2021-06-05 05:21:52,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:21:52,167 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 05:21:52,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:52,194 INFO L225 Difference]: With dead ends: 12090 [2021-06-05 05:21:52,194 INFO L226 Difference]: Without dead ends: 12040 [2021-06-05 05:21:52,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1899.7ms TimeCoverageRelationStatistics Valid=365, Invalid=2497, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:21:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12040 states. [2021-06-05 05:21:52,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12040 to 10371. [2021-06-05 05:21:52,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10371 states, 10370 states have (on average 4.52526518804243) internal successors, (46927), 10370 states have internal predecessors, (46927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10371 states to 10371 states and 46927 transitions. [2021-06-05 05:21:52,388 INFO L78 Accepts]: Start accepts. Automaton has 10371 states and 46927 transitions. Word has length 33 [2021-06-05 05:21:52,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:52,388 INFO L482 AbstractCegarLoop]: Abstraction has 10371 states and 46927 transitions. [2021-06-05 05:21:52,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:21:52,388 INFO L276 IsEmpty]: Start isEmpty. Operand 10371 states and 46927 transitions. [2021-06-05 05:21:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:52,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:52,406 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, 1, 1, 1] [2021-06-05 05:21:52,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:52,607 INFO L430 AbstractCegarLoop]: === Iteration 309 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash 562382802, now seen corresponding path program 228 times [2021-06-05 05:21:52,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:52,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388358386] [2021-06-05 05:21:52,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:52,820 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 05:21:52,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:52,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388358386] [2021-06-05 05:21:52,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388358386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:52,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122941364] [2021-06-05 05:21:52,821 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 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 05:21:52,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:21:52,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:52,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:21:52,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:53,037 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 05:21:53,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 05:21:53,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:21:53,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:53,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:53,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:14 [2021-06-05 05:21:53,173 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 05:21:53,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122941364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:53,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:53,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:21:53,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148262963] [2021-06-05 05:21:53,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:21:53,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:53,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:21:53,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:21:53,174 INFO L87 Difference]: Start difference. First operand 10371 states and 46927 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:54,053 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 05:21:56,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:56,274 INFO L93 Difference]: Finished difference Result 11669 states and 51773 transitions. [2021-06-05 05:21:56,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:21:56,274 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:56,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:56,301 INFO L225 Difference]: With dead ends: 11669 [2021-06-05 05:21:56,302 INFO L226 Difference]: Without dead ends: 11647 [2021-06-05 05:21:56,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2308.7ms TimeCoverageRelationStatistics Valid=538, Invalid=3884, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:21:56,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11647 states. [2021-06-05 05:21:56,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11647 to 10362. [2021-06-05 05:21:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10362 states, 10361 states have (on average 4.525142360775987) internal successors, (46885), 10361 states have internal predecessors, (46885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10362 states to 10362 states and 46885 transitions. [2021-06-05 05:21:56,484 INFO L78 Accepts]: Start accepts. Automaton has 10362 states and 46885 transitions. Word has length 33 [2021-06-05 05:21:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:56,484 INFO L482 AbstractCegarLoop]: Abstraction has 10362 states and 46885 transitions. [2021-06-05 05:21:56,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10362 states and 46885 transitions. [2021-06-05 05:21:56,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:56,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:56,501 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, 1, 1, 1] [2021-06-05 05:21:56,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:56,702 INFO L430 AbstractCegarLoop]: === Iteration 310 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:56,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:56,702 INFO L82 PathProgramCache]: Analyzing trace with hash -336979270, now seen corresponding path program 229 times [2021-06-05 05:21:56,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:56,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107769446] [2021-06-05 05:21:56,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:56,897 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 05:21:56,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:56,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107769446] [2021-06-05 05:21:56,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107769446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:56,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10056053] [2021-06-05 05:21:56,898 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 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 05:21:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:56,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:21:56,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:57,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:57,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:57,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:21:57,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:21:57,092 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 05:21:57,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:57,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:57,101 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 05:21:57,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:17 [2021-06-05 05:21:57,192 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 05:21:57,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10056053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:57,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:57,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:21:57,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881220151] [2021-06-05 05:21:57,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:57,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:57,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:57,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:57,193 INFO L87 Difference]: Start difference. First operand 10362 states and 46885 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:58,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:58,627 INFO L93 Difference]: Finished difference Result 11443 states and 50914 transitions. [2021-06-05 05:21:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:21:58,627 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:21:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:58,653 INFO L225 Difference]: With dead ends: 11443 [2021-06-05 05:21:58,654 INFO L226 Difference]: Without dead ends: 11392 [2021-06-05 05:21:58,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1104.1ms TimeCoverageRelationStatistics Valid=263, Invalid=1717, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:21:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11392 states. [2021-06-05 05:21:58,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11392 to 10325. [2021-06-05 05:21:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10325 states, 10324 states have (on average 4.523924835335142) internal successors, (46705), 10324 states have internal predecessors, (46705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10325 states to 10325 states and 46705 transitions. [2021-06-05 05:21:58,845 INFO L78 Accepts]: Start accepts. Automaton has 10325 states and 46705 transitions. Word has length 33 [2021-06-05 05:21:58,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:58,845 INFO L482 AbstractCegarLoop]: Abstraction has 10325 states and 46705 transitions. [2021-06-05 05:21:58,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 10325 states and 46705 transitions. [2021-06-05 05:21:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:21:58,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:58,862 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, 1, 1, 1] [2021-06-05 05:21:59,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-06-05 05:21:59,062 INFO L430 AbstractCegarLoop]: === Iteration 311 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:59,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:59,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1723141918, now seen corresponding path program 230 times [2021-06-05 05:21:59,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:59,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749736842] [2021-06-05 05:21:59,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:59,259 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 05:21:59,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:59,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749736842] [2021-06-05 05:21:59,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749736842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:59,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723078630] [2021-06-05 05:21:59,260 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 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 05:21:59,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:59,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:59,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:21:59,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:59,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:59,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:59,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:21:59,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:59,445 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 05:21:59,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:59,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:59,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:59,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:43 [2021-06-05 05:21:59,643 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 05:21:59,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723078630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:59,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:59,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:21:59,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239746872] [2021-06-05 05:21:59,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:21:59,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:59,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:21:59,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:59,644 INFO L87 Difference]: Start difference. First operand 10325 states and 46705 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:01,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:01,104 INFO L93 Difference]: Finished difference Result 10797 states and 48408 transitions. [2021-06-05 05:22:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:22:01,104 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:22:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:01,128 INFO L225 Difference]: With dead ends: 10797 [2021-06-05 05:22:01,128 INFO L226 Difference]: Without dead ends: 10753 [2021-06-05 05:22:01,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1241.7ms TimeCoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:22:01,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10753 states. [2021-06-05 05:22:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10753 to 10304. [2021-06-05 05:22:01,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10304 states, 10303 states have (on average 4.523439774822867) internal successors, (46605), 10303 states have internal predecessors, (46605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:01,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10304 states to 10304 states and 46605 transitions. [2021-06-05 05:22:01,299 INFO L78 Accepts]: Start accepts. Automaton has 10304 states and 46605 transitions. Word has length 33 [2021-06-05 05:22:01,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:01,299 INFO L482 AbstractCegarLoop]: Abstraction has 10304 states and 46605 transitions. [2021-06-05 05:22:01,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:01,299 INFO L276 IsEmpty]: Start isEmpty. Operand 10304 states and 46605 transitions. [2021-06-05 05:22:01,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:01,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:01,316 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, 1, 1, 1] [2021-06-05 05:22:01,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 05:22:01,516 INFO L430 AbstractCegarLoop]: === Iteration 312 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:01,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:01,517 INFO L82 PathProgramCache]: Analyzing trace with hash 352313848, now seen corresponding path program 231 times [2021-06-05 05:22:01,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:01,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533566940] [2021-06-05 05:22:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:01,712 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 05:22:01,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:01,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533566940] [2021-06-05 05:22:01,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533566940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:01,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920533687] [2021-06-05 05:22:01,712 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 05:22:01,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:22:01,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:01,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:01,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:01,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:02,024 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:22:02,024 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 29 treesize of output 57 [2021-06-05 05:22:02,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:22:02,051 INFO L628 ElimStorePlain]: treesize reduction 66, result has 25.0 percent of original size [2021-06-05 05:22:02,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:02,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:22 [2021-06-05 05:22:02,153 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 05:22:02,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920533687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:02,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:02,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:22:02,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473380549] [2021-06-05 05:22:02,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:22:02,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:02,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:22:02,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:22:02,154 INFO L87 Difference]: Start difference. First operand 10304 states and 46605 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:03,776 INFO L93 Difference]: Finished difference Result 10985 states and 49049 transitions. [2021-06-05 05:22:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:22:03,776 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:22:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:03,801 INFO L225 Difference]: With dead ends: 10985 [2021-06-05 05:22:03,801 INFO L226 Difference]: Without dead ends: 10937 [2021-06-05 05:22:03,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1149.1ms TimeCoverageRelationStatistics Valid=193, Invalid=1969, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:22:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10937 states. [2021-06-05 05:22:03,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10937 to 10312. [2021-06-05 05:22:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10312 states, 10311 states have (on average 4.522354766753952) internal successors, (46630), 10311 states have internal predecessors, (46630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10312 states to 10312 states and 46630 transitions. [2021-06-05 05:22:03,981 INFO L78 Accepts]: Start accepts. Automaton has 10312 states and 46630 transitions. Word has length 33 [2021-06-05 05:22:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:03,981 INFO L482 AbstractCegarLoop]: Abstraction has 10312 states and 46630 transitions. [2021-06-05 05:22:03,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 10312 states and 46630 transitions. [2021-06-05 05:22:03,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:03,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:03,998 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, 1, 1, 1] [2021-06-05 05:22:04,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 05:22:04,198 INFO L430 AbstractCegarLoop]: === Iteration 313 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:04,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:04,199 INFO L82 PathProgramCache]: Analyzing trace with hash 786343194, now seen corresponding path program 232 times [2021-06-05 05:22:04,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:04,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451356139] [2021-06-05 05:22:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:04,396 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 05:22:04,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:04,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451356139] [2021-06-05 05:22:04,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451356139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:04,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651039030] [2021-06-05 05:22:04,397 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 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 05:22:04,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:04,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:04,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:04,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:04,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:04,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:04,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:04,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:04,611 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 37 treesize of output 17 [2021-06-05 05:22:04,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:04,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:04,621 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 05:22:04,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:17 [2021-06-05 05:22:04,712 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 05:22:04,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651039030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:04,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:04,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:22:04,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165995842] [2021-06-05 05:22:04,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:04,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:04,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:04,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:04,713 INFO L87 Difference]: Start difference. First operand 10312 states and 46630 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:06,239 INFO L93 Difference]: Finished difference Result 10966 states and 48988 transitions. [2021-06-05 05:22:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:22:06,240 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:22:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:06,264 INFO L225 Difference]: With dead ends: 10966 [2021-06-05 05:22:06,264 INFO L226 Difference]: Without dead ends: 10922 [2021-06-05 05:22:06,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1043.6ms TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:22:06,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10922 states. [2021-06-05 05:22:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10922 to 10285. [2021-06-05 05:22:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10285 states, 10284 states have (on average 4.521781408012447) internal successors, (46502), 10284 states have internal predecessors, (46502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10285 states to 10285 states and 46502 transitions. [2021-06-05 05:22:06,441 INFO L78 Accepts]: Start accepts. Automaton has 10285 states and 46502 transitions. Word has length 33 [2021-06-05 05:22:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:06,441 INFO L482 AbstractCegarLoop]: Abstraction has 10285 states and 46502 transitions. [2021-06-05 05:22:06,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 10285 states and 46502 transitions. [2021-06-05 05:22:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:06,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:06,458 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, 1, 1, 1] [2021-06-05 05:22:06,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:06,659 INFO L430 AbstractCegarLoop]: === Iteration 314 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:06,659 INFO L82 PathProgramCache]: Analyzing trace with hash -957293824, now seen corresponding path program 233 times [2021-06-05 05:22:06,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:06,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565938258] [2021-06-05 05:22:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:06,864 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 05:22:06,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:06,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565938258] [2021-06-05 05:22:06,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565938258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:06,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357108696] [2021-06-05 05:22:06,865 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 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 05:22:06,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:22:06,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:06,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:06,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:07,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:07,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:07,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:07,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:07,132 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 05:22:07,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:07,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:07,139 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 05:22:07,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 05:22:07,211 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 05:22:07,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357108696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:07,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:07,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:22:07,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589606976] [2021-06-05 05:22:07,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:07,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:07,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:07,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:07,212 INFO L87 Difference]: Start difference. First operand 10285 states and 46502 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:08,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:08,388 INFO L93 Difference]: Finished difference Result 10610 states and 47638 transitions. [2021-06-05 05:22:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:22:08,388 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:22:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:08,413 INFO L225 Difference]: With dead ends: 10610 [2021-06-05 05:22:08,413 INFO L226 Difference]: Without dead ends: 10558 [2021-06-05 05:22:08,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 880.6ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:22:08,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10558 states. [2021-06-05 05:22:08,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10558 to 10290. [2021-06-05 05:22:08,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10290 states, 10289 states have (on average 4.52084750704636) internal successors, (46515), 10289 states have internal predecessors, (46515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10290 states to 10290 states and 46515 transitions. [2021-06-05 05:22:08,586 INFO L78 Accepts]: Start accepts. Automaton has 10290 states and 46515 transitions. Word has length 33 [2021-06-05 05:22:08,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:08,586 INFO L482 AbstractCegarLoop]: Abstraction has 10290 states and 46515 transitions. [2021-06-05 05:22:08,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:08,586 INFO L276 IsEmpty]: Start isEmpty. Operand 10290 states and 46515 transitions. [2021-06-05 05:22:08,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:08,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:08,603 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, 1, 1, 1] [2021-06-05 05:22:08,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable473 [2021-06-05 05:22:08,803 INFO L430 AbstractCegarLoop]: === Iteration 315 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:08,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1021927330, now seen corresponding path program 234 times [2021-06-05 05:22:08,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:08,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405339954] [2021-06-05 05:22:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:09,009 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 05:22:09,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:09,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405339954] [2021-06-05 05:22:09,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405339954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:09,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143346309] [2021-06-05 05:22:09,009 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 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 05:22:09,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:22:09,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:09,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:09,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:09,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:09,326 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:22:09,326 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 29 treesize of output 57 [2021-06-05 05:22:09,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:22:09,351 INFO L628 ElimStorePlain]: treesize reduction 62, result has 26.2 percent of original size [2021-06-05 05:22:09,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:09,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:22 [2021-06-05 05:22:09,456 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 05:22:09,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143346309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:09,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:09,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:22:09,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937203469] [2021-06-05 05:22:09,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:22:09,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:09,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:22:09,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:22:09,457 INFO L87 Difference]: Start difference. First operand 10290 states and 46515 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:10,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:10,895 INFO L93 Difference]: Finished difference Result 10668 states and 47789 transitions. [2021-06-05 05:22:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:22:10,896 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:22:10,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:10,919 INFO L225 Difference]: With dead ends: 10668 [2021-06-05 05:22:10,920 INFO L226 Difference]: Without dead ends: 10620 [2021-06-05 05:22:10,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1156.9ms TimeCoverageRelationStatistics Valid=188, Invalid=1974, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:22:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10620 states. [2021-06-05 05:22:11,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10620 to 10266. [2021-06-05 05:22:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10266 states, 10265 states have (on average 4.520506575742815) internal successors, (46403), 10265 states have internal predecessors, (46403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10266 states to 10266 states and 46403 transitions. [2021-06-05 05:22:11,091 INFO L78 Accepts]: Start accepts. Automaton has 10266 states and 46403 transitions. Word has length 33 [2021-06-05 05:22:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:11,091 INFO L482 AbstractCegarLoop]: Abstraction has 10266 states and 46403 transitions. [2021-06-05 05:22:11,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 10266 states and 46403 transitions. [2021-06-05 05:22:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:11,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:11,108 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, 1, 1, 1] [2021-06-05 05:22:11,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-05 05:22:11,308 INFO L430 AbstractCegarLoop]: === Iteration 316 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:11,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:11,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1654670000, now seen corresponding path program 235 times [2021-06-05 05:22:11,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:11,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386090793] [2021-06-05 05:22:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:11,522 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 05:22:11,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:11,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386090793] [2021-06-05 05:22:11,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386090793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:11,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130117247] [2021-06-05 05:22:11,522 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 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 05:22:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:11,689 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 05:22:11,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:11,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:11,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:11,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:22:11,766 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 05:22:11,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130117247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:11,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:11,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:22:11,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291426879] [2021-06-05 05:22:11,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:11,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:11,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:11,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:11,767 INFO L87 Difference]: Start difference. First operand 10266 states and 46403 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:22:13,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:13,764 INFO L93 Difference]: Finished difference Result 12688 states and 55671 transitions. [2021-06-05 05:22:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:22:13,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 05:22:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:13,795 INFO L225 Difference]: With dead ends: 12688 [2021-06-05 05:22:13,795 INFO L226 Difference]: Without dead ends: 12638 [2021-06-05 05:22:13,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1622.6ms TimeCoverageRelationStatistics Valid=352, Invalid=2300, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:22:13,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12638 states. [2021-06-05 05:22:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12638 to 10573. [2021-06-05 05:22:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10573 states, 10572 states have (on average 4.526579644343549) internal successors, (47855), 10572 states have internal predecessors, (47855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 47855 transitions. [2021-06-05 05:22:13,997 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 47855 transitions. Word has length 33 [2021-06-05 05:22:13,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:13,997 INFO L482 AbstractCegarLoop]: Abstraction has 10573 states and 47855 transitions. [2021-06-05 05:22:13,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:22:13,997 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 47855 transitions. [2021-06-05 05:22:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:14,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:14,015 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, 1, 1, 1] [2021-06-05 05:22:14,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 05:22:14,215 INFO L430 AbstractCegarLoop]: === Iteration 317 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:14,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1337024690, now seen corresponding path program 236 times [2021-06-05 05:22:14,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:14,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917015566] [2021-06-05 05:22:14,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:14,442 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 05:22:14,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:14,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917015566] [2021-06-05 05:22:14,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917015566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:14,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858410461] [2021-06-05 05:22:14,442 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 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 05:22:14,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:14,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:14,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:22:14,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:14,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:14,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:14,617 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 24 treesize of output 30 [2021-06-05 05:22:14,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:14,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:14,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:14,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:32 [2021-06-05 05:22:14,770 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 05:22:14,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858410461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:14,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:14,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:22:14,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333261881] [2021-06-05 05:22:14,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:22:14,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:14,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:22:14,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:22:14,771 INFO L87 Difference]: Start difference. First operand 10573 states and 47855 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 05:22:16,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:16,595 INFO L93 Difference]: Finished difference Result 11822 states and 52548 transitions. [2021-06-05 05:22:16,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:22:16,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 05:22:16,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:16,622 INFO L225 Difference]: With dead ends: 11822 [2021-06-05 05:22:16,622 INFO L226 Difference]: Without dead ends: 11800 [2021-06-05 05:22:16,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1528.5ms TimeCoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:22:16,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11800 states. [2021-06-05 05:22:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11800 to 10573. [2021-06-05 05:22:16,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10573 states, 10572 states have (on average 4.5262958758986) internal successors, (47852), 10572 states have internal predecessors, (47852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 47852 transitions. [2021-06-05 05:22:16,808 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 47852 transitions. Word has length 33 [2021-06-05 05:22:16,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:16,808 INFO L482 AbstractCegarLoop]: Abstraction has 10573 states and 47852 transitions. [2021-06-05 05:22:16,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 05:22:16,808 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 47852 transitions. [2021-06-05 05:22:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:16,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:16,825 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, 1, 1, 1] [2021-06-05 05:22:17,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:17,026 INFO L430 AbstractCegarLoop]: === Iteration 318 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:17,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:17,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2058580534, now seen corresponding path program 237 times [2021-06-05 05:22:17,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:17,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083323139] [2021-06-05 05:22:17,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:17,217 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 05:22:17,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:17,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083323139] [2021-06-05 05:22:17,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083323139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:17,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445474516] [2021-06-05 05:22:17,218 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 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 05:22:17,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:22:17,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:17,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:17,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:17,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:17,444 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:22:17,444 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 27 treesize of output 55 [2021-06-05 05:22:17,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:22:17,489 INFO L628 ElimStorePlain]: treesize reduction 74, result has 22.9 percent of original size [2021-06-05 05:22:17,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:17,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 05:22:17,627 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 05:22:17,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445474516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:17,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:17,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:22:17,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125431794] [2021-06-05 05:22:17,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:22:17,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:17,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:22:17,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:22:17,628 INFO L87 Difference]: Start difference. First operand 10573 states and 47852 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:19,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:19,483 INFO L93 Difference]: Finished difference Result 11922 states and 52942 transitions. [2021-06-05 05:22:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:22:19,483 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:22:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:19,511 INFO L225 Difference]: With dead ends: 11922 [2021-06-05 05:22:19,512 INFO L226 Difference]: Without dead ends: 11884 [2021-06-05 05:22:19,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1487.5ms TimeCoverageRelationStatistics Valid=401, Invalid=2905, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:22:19,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11884 states. [2021-06-05 05:22:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11884 to 10643. [2021-06-05 05:22:19,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10643 states, 10642 states have (on average 4.529975568502161) internal successors, (48208), 10642 states have internal predecessors, (48208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10643 states to 10643 states and 48208 transitions. [2021-06-05 05:22:19,715 INFO L78 Accepts]: Start accepts. Automaton has 10643 states and 48208 transitions. Word has length 33 [2021-06-05 05:22:19,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:19,715 INFO L482 AbstractCegarLoop]: Abstraction has 10643 states and 48208 transitions. [2021-06-05 05:22:19,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:19,715 INFO L276 IsEmpty]: Start isEmpty. Operand 10643 states and 48208 transitions. [2021-06-05 05:22:19,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:19,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:19,733 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, 1, 1, 1] [2021-06-05 05:22:19,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:19,933 INFO L430 AbstractCegarLoop]: === Iteration 319 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:19,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:19,934 INFO L82 PathProgramCache]: Analyzing trace with hash 277982232, now seen corresponding path program 238 times [2021-06-05 05:22:19,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:19,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490349934] [2021-06-05 05:22:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:20,218 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 05:22:20,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:20,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490349934] [2021-06-05 05:22:20,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490349934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:20,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286730107] [2021-06-05 05:22:20,219 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 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 05:22:20,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:20,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:20,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:20,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:20,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:20,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:20,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:20,402 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 33 treesize of output 17 [2021-06-05 05:22:20,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:20,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:20,411 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 05:22:20,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:17 [2021-06-05 05:22:20,499 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 05:22:20,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286730107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:20,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:20,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:22:20,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765498010] [2021-06-05 05:22:20,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:20,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:20,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:20,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:20,500 INFO L87 Difference]: Start difference. First operand 10643 states and 48208 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:21,779 INFO L93 Difference]: Finished difference Result 12186 states and 53817 transitions. [2021-06-05 05:22:21,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:22:21,780 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:22:21,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:21,808 INFO L225 Difference]: With dead ends: 12186 [2021-06-05 05:22:21,808 INFO L226 Difference]: Without dead ends: 12146 [2021-06-05 05:22:21,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 969.2ms TimeCoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:22:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12146 states. [2021-06-05 05:22:22,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12146 to 10521. [2021-06-05 05:22:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10521 states, 10520 states have (on average 4.530893536121673) internal successors, (47665), 10520 states have internal predecessors, (47665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10521 states to 10521 states and 47665 transitions. [2021-06-05 05:22:22,053 INFO L78 Accepts]: Start accepts. Automaton has 10521 states and 47665 transitions. Word has length 33 [2021-06-05 05:22:22,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:22,053 INFO L482 AbstractCegarLoop]: Abstraction has 10521 states and 47665 transitions. [2021-06-05 05:22:22,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand 10521 states and 47665 transitions. [2021-06-05 05:22:22,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:22,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:22,071 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, 1, 1, 1] [2021-06-05 05:22:22,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:22,271 INFO L430 AbstractCegarLoop]: === Iteration 320 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:22,272 INFO L82 PathProgramCache]: Analyzing trace with hash 672417886, now seen corresponding path program 239 times [2021-06-05 05:22:22,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:22,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137408543] [2021-06-05 05:22:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:22,466 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 05:22:22,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:22,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137408543] [2021-06-05 05:22:22,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137408543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:22,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227912739] [2021-06-05 05:22:22,466 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 05:22:22,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:22:22,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:22,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:22,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:22,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:22,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:22,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:22,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:22,706 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 27 treesize of output 45 [2021-06-05 05:22:22,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:22:22,737 INFO L628 ElimStorePlain]: treesize reduction 39, result has 45.1 percent of original size [2021-06-05 05:22:22,738 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 05:22:22,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:44 [2021-06-05 05:22:22,863 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 05:22:22,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227912739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:22,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:22,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 05:22:22,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29891220] [2021-06-05 05:22:22,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:22:22,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:22,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:22:22,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:22:22,864 INFO L87 Difference]: Start difference. First operand 10521 states and 47665 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:24,270 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-06-05 05:22:24,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:24,876 INFO L93 Difference]: Finished difference Result 11417 states and 51137 transitions. [2021-06-05 05:22:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:22:24,876 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:22:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:24,903 INFO L225 Difference]: With dead ends: 11417 [2021-06-05 05:22:24,903 INFO L226 Difference]: Without dead ends: 11373 [2021-06-05 05:22:24,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1534.9ms TimeCoverageRelationStatistics Valid=280, Invalid=2476, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:22:24,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2021-06-05 05:22:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 10551. [2021-06-05 05:22:25,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10551 states, 10550 states have (on average 4.532701421800948) internal successors, (47820), 10550 states have internal predecessors, (47820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10551 states to 10551 states and 47820 transitions. [2021-06-05 05:22:25,158 INFO L78 Accepts]: Start accepts. Automaton has 10551 states and 47820 transitions. Word has length 33 [2021-06-05 05:22:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:25,158 INFO L482 AbstractCegarLoop]: Abstraction has 10551 states and 47820 transitions. [2021-06-05 05:22:25,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 10551 states and 47820 transitions. [2021-06-05 05:22:25,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:25,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:25,176 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, 1, 1, 1] [2021-06-05 05:22:25,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 05:22:25,377 INFO L430 AbstractCegarLoop]: === Iteration 321 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:25,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:25,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1547093644, now seen corresponding path program 240 times [2021-06-05 05:22:25,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:25,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680204746] [2021-06-05 05:22:25,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:25,567 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 05:22:25,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:25,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680204746] [2021-06-05 05:22:25,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680204746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:25,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449153418] [2021-06-05 05:22:25,568 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 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 05:22:25,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:22:25,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:25,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:22:25,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:25,846 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 05:22:25,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 57 [2021-06-05 05:22:25,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:22:25,864 INFO L628 ElimStorePlain]: treesize reduction 42, result has 20.8 percent of original size [2021-06-05 05:22:25,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:22:25,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 05:22:25,898 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 05:22:25,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449153418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:25,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:25,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:22:25,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519640246] [2021-06-05 05:22:25,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:22:25,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:25,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:22:25,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:22:25,899 INFO L87 Difference]: Start difference. First operand 10551 states and 47820 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:27,446 INFO L93 Difference]: Finished difference Result 11447 states and 51353 transitions. [2021-06-05 05:22:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:22:27,446 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:22:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:27,473 INFO L225 Difference]: With dead ends: 11447 [2021-06-05 05:22:27,473 INFO L226 Difference]: Without dead ends: 11414 [2021-06-05 05:22:27,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1056.8ms TimeCoverageRelationStatistics Valid=206, Invalid=1956, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:22:27,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11414 states. [2021-06-05 05:22:27,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11414 to 10551. [2021-06-05 05:22:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10551 states, 10550 states have (on average 4.532701421800948) internal successors, (47820), 10550 states have internal predecessors, (47820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:27,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10551 states to 10551 states and 47820 transitions. [2021-06-05 05:22:27,670 INFO L78 Accepts]: Start accepts. Automaton has 10551 states and 47820 transitions. Word has length 33 [2021-06-05 05:22:27,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:27,670 INFO L482 AbstractCegarLoop]: Abstraction has 10551 states and 47820 transitions. [2021-06-05 05:22:27,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:27,670 INFO L276 IsEmpty]: Start isEmpty. Operand 10551 states and 47820 transitions. [2021-06-05 05:22:27,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:27,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:27,688 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, 1, 1, 1] [2021-06-05 05:22:27,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 05:22:27,889 INFO L430 AbstractCegarLoop]: === Iteration 322 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:27,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1113064298, now seen corresponding path program 241 times [2021-06-05 05:22:27,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:27,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110866683] [2021-06-05 05:22:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:28,128 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 05:22:28,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:28,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110866683] [2021-06-05 05:22:28,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110866683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:28,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671934953] [2021-06-05 05:22:28,129 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 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 05:22:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:28,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:28,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:28,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:28,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:28,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:28,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:28,395 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 37 treesize of output 17 [2021-06-05 05:22:28,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:28,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:28,405 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 05:22:28,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:17 [2021-06-05 05:22:28,494 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 05:22:28,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671934953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:28,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:28,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:22:28,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414103530] [2021-06-05 05:22:28,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:28,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:28,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:28,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:28,495 INFO L87 Difference]: Start difference. First operand 10551 states and 47820 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:29,874 INFO L93 Difference]: Finished difference Result 11263 states and 50528 transitions. [2021-06-05 05:22:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:22:29,875 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:22:29,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:29,900 INFO L225 Difference]: With dead ends: 11263 [2021-06-05 05:22:29,901 INFO L226 Difference]: Without dead ends: 11219 [2021-06-05 05:22:29,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1101.5ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:22:29,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11219 states. [2021-06-05 05:22:30,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11219 to 10533. [2021-06-05 05:22:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10533 states, 10532 states have (on average 4.533421952145841) internal successors, (47746), 10532 states have internal predecessors, (47746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:30,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10533 states to 10533 states and 47746 transitions. [2021-06-05 05:22:30,153 INFO L78 Accepts]: Start accepts. Automaton has 10533 states and 47746 transitions. Word has length 33 [2021-06-05 05:22:30,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:30,153 INFO L482 AbstractCegarLoop]: Abstraction has 10533 states and 47746 transitions. [2021-06-05 05:22:30,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:30,153 INFO L276 IsEmpty]: Start isEmpty. Operand 10533 states and 47746 transitions. [2021-06-05 05:22:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:30,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:30,170 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, 1, 1, 1] [2021-06-05 05:22:30,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:30,371 INFO L430 AbstractCegarLoop]: === Iteration 323 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:30,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:30,371 INFO L82 PathProgramCache]: Analyzing trace with hash -691009676, now seen corresponding path program 242 times [2021-06-05 05:22:30,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:30,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134327438] [2021-06-05 05:22:30,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:30,593 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 05:22:30,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:30,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134327438] [2021-06-05 05:22:30,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134327438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:30,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530156094] [2021-06-05 05:22:30,594 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 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 05:22:30,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:30,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:30,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:30,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:30,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:30,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:30,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:30,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:30,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:30,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:22:31,053 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 05:22:31,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530156094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:31,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:31,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:22:31,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929766903] [2021-06-05 05:22:31,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:22:31,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:31,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:22:31,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:22:31,054 INFO L87 Difference]: Start difference. First operand 10533 states and 47746 transitions. Second operand has 25 states, 25 states have (on average 2.04) 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 05:22:31,188 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 05:22:32,191 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 05:22:34,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:34,171 INFO L93 Difference]: Finished difference Result 12121 states and 54001 transitions. [2021-06-05 05:22:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:22:34,172 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) 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 33 [2021-06-05 05:22:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:34,199 INFO L225 Difference]: With dead ends: 12121 [2021-06-05 05:22:34,199 INFO L226 Difference]: Without dead ends: 12059 [2021-06-05 05:22:34,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 2545.4ms TimeCoverageRelationStatistics Valid=383, Invalid=2587, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:22:34,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12059 states. [2021-06-05 05:22:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12059 to 10754. [2021-06-05 05:22:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10754 states, 10753 states have (on average 4.5405003254905605) internal successors, (48824), 10753 states have internal predecessors, (48824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:34,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10754 states to 10754 states and 48824 transitions. [2021-06-05 05:22:34,396 INFO L78 Accepts]: Start accepts. Automaton has 10754 states and 48824 transitions. Word has length 33 [2021-06-05 05:22:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:34,397 INFO L482 AbstractCegarLoop]: Abstraction has 10754 states and 48824 transitions. [2021-06-05 05:22:34,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) 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 05:22:34,397 INFO L276 IsEmpty]: Start isEmpty. Operand 10754 states and 48824 transitions. [2021-06-05 05:22:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:34,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:34,414 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, 1, 1, 1] [2021-06-05 05:22:34,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:34,615 INFO L430 AbstractCegarLoop]: === Iteration 324 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:34,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:34,615 INFO L82 PathProgramCache]: Analyzing trace with hash 612262930, now seen corresponding path program 243 times [2021-06-05 05:22:34,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:34,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910798634] [2021-06-05 05:22:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:34,836 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 05:22:34,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:34,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910798634] [2021-06-05 05:22:34,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910798634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:34,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393904638] [2021-06-05 05:22:34,837 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 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 05:22:34,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:22:34,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:34,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:34,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:35,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:35,042 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:22:35,042 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 29 treesize of output 57 [2021-06-05 05:22:35,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:35,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:35,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:35,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 05:22:35,327 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 05:22:35,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393904638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:35,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:35,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:22:35,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141658943] [2021-06-05 05:22:35,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:22:35,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:35,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:22:35,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:22:35,328 INFO L87 Difference]: Start difference. First operand 10754 states and 48824 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:37,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:37,191 INFO L93 Difference]: Finished difference Result 11893 states and 53164 transitions. [2021-06-05 05:22:37,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:22:37,192 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:22:37,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:37,219 INFO L225 Difference]: With dead ends: 11893 [2021-06-05 05:22:37,219 INFO L226 Difference]: Without dead ends: 11875 [2021-06-05 05:22:37,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1566.8ms TimeCoverageRelationStatistics Valid=416, Invalid=2664, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:22:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11875 states. [2021-06-05 05:22:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11875 to 10754. [2021-06-05 05:22:37,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10754 states, 10753 states have (on average 4.5405003254905605) internal successors, (48824), 10753 states have internal predecessors, (48824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:37,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10754 states to 10754 states and 48824 transitions. [2021-06-05 05:22:37,427 INFO L78 Accepts]: Start accepts. Automaton has 10754 states and 48824 transitions. Word has length 33 [2021-06-05 05:22:37,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:37,427 INFO L482 AbstractCegarLoop]: Abstraction has 10754 states and 48824 transitions. [2021-06-05 05:22:37,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:37,427 INFO L276 IsEmpty]: Start isEmpty. Operand 10754 states and 48824 transitions. [2021-06-05 05:22:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:37,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:37,446 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, 1, 1, 1] [2021-06-05 05:22:37,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 05:22:37,646 INFO L430 AbstractCegarLoop]: === Iteration 325 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:37,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:37,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1056130512, now seen corresponding path program 244 times [2021-06-05 05:22:37,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:37,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032827181] [2021-06-05 05:22:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:37,866 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 05:22:37,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:37,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032827181] [2021-06-05 05:22:37,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032827181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:37,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067128341] [2021-06-05 05:22:37,867 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 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 05:22:37,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:37,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:37,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:37,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:38,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:38,008 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 29 treesize of output 13 [2021-06-05 05:22:38,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:38,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:38,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:38,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:22:38,105 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 05:22:38,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067128341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:38,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:38,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:22:38,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612560858] [2021-06-05 05:22:38,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:38,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:38,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:38,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:38,106 INFO L87 Difference]: Start difference. First operand 10754 states and 48824 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 05:22:38,501 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 05:22:39,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:39,824 INFO L93 Difference]: Finished difference Result 12189 states and 54296 transitions. [2021-06-05 05:22:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:22:39,824 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 33 [2021-06-05 05:22:39,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:39,852 INFO L225 Difference]: With dead ends: 12189 [2021-06-05 05:22:39,852 INFO L226 Difference]: Without dead ends: 12161 [2021-06-05 05:22:39,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1275.2ms TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:22:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12161 states. [2021-06-05 05:22:40,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12161 to 10842. [2021-06-05 05:22:40,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10842 states, 10841 states have (on average 4.539525873996864) internal successors, (49213), 10841 states have internal predecessors, (49213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10842 states to 10842 states and 49213 transitions. [2021-06-05 05:22:40,118 INFO L78 Accepts]: Start accepts. Automaton has 10842 states and 49213 transitions. Word has length 33 [2021-06-05 05:22:40,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:40,118 INFO L482 AbstractCegarLoop]: Abstraction has 10842 states and 49213 transitions. [2021-06-05 05:22:40,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 05:22:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 10842 states and 49213 transitions. [2021-06-05 05:22:40,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:40,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:40,135 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, 1, 1, 1] [2021-06-05 05:22:40,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:40,336 INFO L430 AbstractCegarLoop]: === Iteration 326 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:40,336 INFO L82 PathProgramCache]: Analyzing trace with hash -287099142, now seen corresponding path program 245 times [2021-06-05 05:22:40,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:40,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794786914] [2021-06-05 05:22:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:40,536 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 05:22:40,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:40,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794786914] [2021-06-05 05:22:40,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794786914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:40,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10492138] [2021-06-05 05:22:40,537 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 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 05:22:40,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:22:40,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:40,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:40,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:40,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:40,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:40,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:40,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:40,689 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 34 treesize of output 16 [2021-06-05 05:22:40,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:40,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:40,699 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 05:22:40,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:16 [2021-06-05 05:22:40,803 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 05:22:40,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10492138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:40,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:40,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:22:40,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273062554] [2021-06-05 05:22:40,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:40,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:40,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:40,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:40,804 INFO L87 Difference]: Start difference. First operand 10842 states and 49213 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:42,257 INFO L93 Difference]: Finished difference Result 12229 states and 54380 transitions. [2021-06-05 05:22:42,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:22:42,258 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:22:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:42,285 INFO L225 Difference]: With dead ends: 12229 [2021-06-05 05:22:42,286 INFO L226 Difference]: Without dead ends: 12178 [2021-06-05 05:22:42,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1114.4ms TimeCoverageRelationStatistics Valid=301, Invalid=1679, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:22:42,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12178 states. [2021-06-05 05:22:42,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12178 to 10916. [2021-06-05 05:22:42,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10916 states, 10915 states have (on average 4.536601007787448) internal successors, (49517), 10915 states have internal predecessors, (49517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:42,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10916 states to 10916 states and 49517 transitions. [2021-06-05 05:22:42,485 INFO L78 Accepts]: Start accepts. Automaton has 10916 states and 49517 transitions. Word has length 33 [2021-06-05 05:22:42,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:42,485 INFO L482 AbstractCegarLoop]: Abstraction has 10916 states and 49517 transitions. [2021-06-05 05:22:42,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10916 states and 49517 transitions. [2021-06-05 05:22:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:42,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:42,503 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, 1, 1, 1] [2021-06-05 05:22:42,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 05:22:42,704 INFO L430 AbstractCegarLoop]: === Iteration 327 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:42,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:42,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1673261790, now seen corresponding path program 246 times [2021-06-05 05:22:42,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:42,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071170434] [2021-06-05 05:22:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:42,902 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 05:22:42,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:42,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071170434] [2021-06-05 05:22:42,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071170434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:42,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312941030] [2021-06-05 05:22:42,903 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 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 05:22:42,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:22:42,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:42,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:42,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:43,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:43,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 40 [2021-06-05 05:22:43,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:43,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:43,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:43,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:37 [2021-06-05 05:22:43,384 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 05:22:43,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312941030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:43,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:43,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:22:43,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749711715] [2021-06-05 05:22:43,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:22:43,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:43,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:22:43,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:22:43,385 INFO L87 Difference]: Start difference. First operand 10916 states and 49517 transitions. Second operand has 25 states, 25 states have (on average 2.04) 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 05:22:43,584 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 05:22:44,006 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2021-06-05 05:22:44,345 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2021-06-05 05:22:44,497 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-06-05 05:22:44,657 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 05:22:44,992 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 05:22:46,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:46,718 INFO L93 Difference]: Finished difference Result 11810 states and 53277 transitions. [2021-06-05 05:22:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:22:46,719 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) 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 33 [2021-06-05 05:22:46,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:46,746 INFO L225 Difference]: With dead ends: 11810 [2021-06-05 05:22:46,747 INFO L226 Difference]: Without dead ends: 11781 [2021-06-05 05:22:46,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 2911.4ms TimeCoverageRelationStatistics Valid=435, Invalid=2757, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:22:46,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11781 states. [2021-06-05 05:22:46,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11781 to 10901. [2021-06-05 05:22:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10901 states, 10900 states have (on average 4.53743119266055) internal successors, (49458), 10900 states have internal predecessors, (49458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:46,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10901 states to 10901 states and 49458 transitions. [2021-06-05 05:22:46,933 INFO L78 Accepts]: Start accepts. Automaton has 10901 states and 49458 transitions. Word has length 33 [2021-06-05 05:22:46,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:46,933 INFO L482 AbstractCegarLoop]: Abstraction has 10901 states and 49458 transitions. [2021-06-05 05:22:46,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) 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 05:22:46,933 INFO L276 IsEmpty]: Start isEmpty. Operand 10901 states and 49458 transitions. [2021-06-05 05:22:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:46,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:46,951 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, 1, 1, 1] [2021-06-05 05:22:47,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-05 05:22:47,152 INFO L430 AbstractCegarLoop]: === Iteration 328 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:47,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:47,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1572933104, now seen corresponding path program 247 times [2021-06-05 05:22:47,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:47,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351809009] [2021-06-05 05:22:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:47,371 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 05:22:47,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:47,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351809009] [2021-06-05 05:22:47,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351809009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:47,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398054182] [2021-06-05 05:22:47,371 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 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 05:22:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:47,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:47,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:47,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:47,516 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 29 treesize of output 13 [2021-06-05 05:22:47,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:47,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:47,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:47,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:22:47,614 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 05:22:47,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398054182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:47,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:47,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:22:47,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026324247] [2021-06-05 05:22:47,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:47,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:47,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:47,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:47,615 INFO L87 Difference]: Start difference. First operand 10901 states and 49458 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:22:48,148 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 05:22:49,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:49,543 INFO L93 Difference]: Finished difference Result 12630 states and 56063 transitions. [2021-06-05 05:22:49,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:22:49,543 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 05:22:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:49,573 INFO L225 Difference]: With dead ends: 12630 [2021-06-05 05:22:49,573 INFO L226 Difference]: Without dead ends: 12580 [2021-06-05 05:22:49,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1525.6ms TimeCoverageRelationStatistics Valid=351, Invalid=2199, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:22:49,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12580 states. [2021-06-05 05:22:49,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12580 to 11090. [2021-06-05 05:22:49,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11090 states, 11089 states have (on average 4.534764180719632) internal successors, (50286), 11089 states have internal predecessors, (50286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11090 states to 11090 states and 50286 transitions. [2021-06-05 05:22:49,895 INFO L78 Accepts]: Start accepts. Automaton has 11090 states and 50286 transitions. Word has length 33 [2021-06-05 05:22:49,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:49,895 INFO L482 AbstractCegarLoop]: Abstraction has 11090 states and 50286 transitions. [2021-06-05 05:22:49,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:22:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 11090 states and 50286 transitions. [2021-06-05 05:22:49,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:49,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:49,914 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, 1, 1, 1] [2021-06-05 05:22:50,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-05 05:22:50,115 INFO L430 AbstractCegarLoop]: === Iteration 329 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:50,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1418761586, now seen corresponding path program 248 times [2021-06-05 05:22:50,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:50,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436551710] [2021-06-05 05:22:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:50,333 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 05:22:50,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:50,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436551710] [2021-06-05 05:22:50,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436551710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:50,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465367301] [2021-06-05 05:22:50,334 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 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 05:22:50,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:50,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:50,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:50,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:50,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:50,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:50,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:50,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:50,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:50,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:22:50,725 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 05:22:50,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465367301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:50,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:50,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:22:50,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803673565] [2021-06-05 05:22:50,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:22:50,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:50,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:22:50,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:22:50,726 INFO L87 Difference]: Start difference. First operand 11090 states and 50286 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) 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 05:22:53,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:53,606 INFO L93 Difference]: Finished difference Result 12738 states and 56267 transitions. [2021-06-05 05:22:53,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:22:53,607 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) 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 33 [2021-06-05 05:22:53,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:53,637 INFO L225 Difference]: With dead ends: 12738 [2021-06-05 05:22:53,637 INFO L226 Difference]: Without dead ends: 12716 [2021-06-05 05:22:53,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 2360.4ms TimeCoverageRelationStatistics Valid=496, Invalid=2926, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:22:53,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12716 states. [2021-06-05 05:22:53,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12716 to 11147. [2021-06-05 05:22:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11147 states, 11146 states have (on average 4.537771397810874) internal successors, (50578), 11146 states have internal predecessors, (50578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:53,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11147 states to 11147 states and 50578 transitions. [2021-06-05 05:22:53,849 INFO L78 Accepts]: Start accepts. Automaton has 11147 states and 50578 transitions. Word has length 33 [2021-06-05 05:22:53,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:53,849 INFO L482 AbstractCegarLoop]: Abstraction has 11147 states and 50578 transitions. [2021-06-05 05:22:53,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) 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 05:22:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 11147 states and 50578 transitions. [2021-06-05 05:22:53,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:53,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:53,867 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, 1, 1, 1] [2021-06-05 05:22:54,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-05 05:22:54,067 INFO L430 AbstractCegarLoop]: === Iteration 330 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:54,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1976843638, now seen corresponding path program 249 times [2021-06-05 05:22:54,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:54,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778475423] [2021-06-05 05:22:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:54,279 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 05:22:54,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:54,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778475423] [2021-06-05 05:22:54,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778475423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:54,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885977278] [2021-06-05 05:22:54,279 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 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 05:22:54,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:22:54,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:54,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:54,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:54,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:54,485 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:22:54,485 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 29 treesize of output 57 [2021-06-05 05:22:54,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:54,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:54,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:54,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 05:22:54,686 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 05:22:54,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885977278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:54,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:54,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 05:22:54,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712907902] [2021-06-05 05:22:54,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:22:54,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:54,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:22:54,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:22:54,686 INFO L87 Difference]: Start difference. First operand 11147 states and 50578 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:57,093 INFO L93 Difference]: Finished difference Result 12293 states and 54875 transitions. [2021-06-05 05:22:57,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:22:57,093 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:22:57,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:57,120 INFO L225 Difference]: With dead ends: 12293 [2021-06-05 05:22:57,121 INFO L226 Difference]: Without dead ends: 12247 [2021-06-05 05:22:57,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1995.7ms TimeCoverageRelationStatistics Valid=511, Invalid=3395, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:22:57,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12247 states. [2021-06-05 05:22:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12247 to 11199. [2021-06-05 05:22:57,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11199 states, 11198 states have (on average 4.534023932845151) internal successors, (50772), 11198 states have internal predecessors, (50772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11199 states to 11199 states and 50772 transitions. [2021-06-05 05:22:57,323 INFO L78 Accepts]: Start accepts. Automaton has 11199 states and 50772 transitions. Word has length 33 [2021-06-05 05:22:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:57,323 INFO L482 AbstractCegarLoop]: Abstraction has 11199 states and 50772 transitions. [2021-06-05 05:22:57,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 11199 states and 50772 transitions. [2021-06-05 05:22:57,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:57,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:57,342 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, 1, 1, 1] [2021-06-05 05:22:57,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:57,542 INFO L430 AbstractCegarLoop]: === Iteration 331 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:57,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:57,542 INFO L82 PathProgramCache]: Analyzing trace with hash 196245336, now seen corresponding path program 250 times [2021-06-05 05:22:57,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:57,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080943998] [2021-06-05 05:22:57,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:57,765 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 05:22:57,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:57,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080943998] [2021-06-05 05:22:57,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080943998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:57,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544297145] [2021-06-05 05:22:57,766 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 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 05:22:57,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:57,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:57,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:57,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:57,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:57,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:57,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:57,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:57,920 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 34 treesize of output 16 [2021-06-05 05:22:57,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:57,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:57,931 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 05:22:57,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:16 [2021-06-05 05:22:58,049 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 05:22:58,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544297145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:58,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:58,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:22:58,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88210005] [2021-06-05 05:22:58,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:58,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:58,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:58,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:58,050 INFO L87 Difference]: Start difference. First operand 11199 states and 50772 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:59,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:59,113 INFO L93 Difference]: Finished difference Result 12416 states and 55289 transitions. [2021-06-05 05:22:59,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:22:59,114 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:22:59,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:59,143 INFO L225 Difference]: With dead ends: 12416 [2021-06-05 05:22:59,143 INFO L226 Difference]: Without dead ends: 12382 [2021-06-05 05:22:59,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 876.0ms TimeCoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:22:59,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12382 states. [2021-06-05 05:22:59,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12382 to 11115. [2021-06-05 05:22:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11115 states, 11114 states have (on average 4.535090876372143) internal successors, (50403), 11114 states have internal predecessors, (50403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11115 states to 11115 states and 50403 transitions. [2021-06-05 05:22:59,336 INFO L78 Accepts]: Start accepts. Automaton has 11115 states and 50403 transitions. Word has length 33 [2021-06-05 05:22:59,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:59,336 INFO L482 AbstractCegarLoop]: Abstraction has 11115 states and 50403 transitions. [2021-06-05 05:22:59,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:59,336 INFO L276 IsEmpty]: Start isEmpty. Operand 11115 states and 50403 transitions. [2021-06-05 05:22:59,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:22:59,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:59,353 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, 1, 1, 1] [2021-06-05 05:22:59,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 05:22:59,554 INFO L430 AbstractCegarLoop]: === Iteration 332 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:59,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:59,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2092165424, now seen corresponding path program 251 times [2021-06-05 05:22:59,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:59,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202267185] [2021-06-05 05:22:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:59,768 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-06-05 05:22:59,858 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 05:22:59,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:59,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202267185] [2021-06-05 05:22:59,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202267185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:59,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609034846] [2021-06-05 05:22:59,858 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 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 05:22:59,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:22:59,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:59,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:22:59,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:00,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:00,015 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 29 treesize of output 13 [2021-06-05 05:23:00,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:00,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:00,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:00,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:23:00,152 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 05:23:00,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609034846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:00,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:00,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:23:00,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016813303] [2021-06-05 05:23:00,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:00,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:00,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:00,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:00,153 INFO L87 Difference]: Start difference. First operand 11115 states and 50403 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:23:00,704 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 05:23:01,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:01,845 INFO L93 Difference]: Finished difference Result 11817 states and 53157 transitions. [2021-06-05 05:23:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:23:01,846 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 05:23:01,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:01,872 INFO L225 Difference]: With dead ends: 11817 [2021-06-05 05:23:01,872 INFO L226 Difference]: Without dead ends: 11798 [2021-06-05 05:23:01,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1443.7ms TimeCoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:23:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11798 states. [2021-06-05 05:23:02,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11798 to 11112. [2021-06-05 05:23:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11112 states, 11111 states have (on average 4.535415354153542) internal successors, (50393), 11111 states have internal predecessors, (50393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11112 states to 11112 states and 50393 transitions. [2021-06-05 05:23:02,061 INFO L78 Accepts]: Start accepts. Automaton has 11112 states and 50393 transitions. Word has length 33 [2021-06-05 05:23:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:02,061 INFO L482 AbstractCegarLoop]: Abstraction has 11112 states and 50393 transitions. [2021-06-05 05:23:02,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:23:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 11112 states and 50393 transitions. [2021-06-05 05:23:02,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:02,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:02,079 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, 1, 1, 1] [2021-06-05 05:23:02,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 05:23:02,280 INFO L430 AbstractCegarLoop]: === Iteration 333 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash -578352842, now seen corresponding path program 252 times [2021-06-05 05:23:02,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:02,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012375266] [2021-06-05 05:23:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:02,505 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 05:23:02,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:02,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012375266] [2021-06-05 05:23:02,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012375266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:02,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971841835] [2021-06-05 05:23:02,505 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 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 05:23:02,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:23:02,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:02,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:23:02,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:02,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:02,724 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:23:02,724 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 27 treesize of output 55 [2021-06-05 05:23:02,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:23:02,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:02,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:02,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:27 [2021-06-05 05:23:02,858 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 05:23:02,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971841835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:02,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:02,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:23:02,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75819158] [2021-06-05 05:23:02,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:23:02,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:02,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:23:02,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:23:02,859 INFO L87 Difference]: Start difference. First operand 11112 states and 50393 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:04,935 INFO L93 Difference]: Finished difference Result 12162 states and 53991 transitions. [2021-06-05 05:23:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:23:04,935 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:23:04,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:04,962 INFO L225 Difference]: With dead ends: 12162 [2021-06-05 05:23:04,962 INFO L226 Difference]: Without dead ends: 12144 [2021-06-05 05:23:04,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1588.4ms TimeCoverageRelationStatistics Valid=307, Invalid=2045, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:23:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12144 states. [2021-06-05 05:23:05,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12144 to 11099. [2021-06-05 05:23:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11099 states, 11098 states have (on average 4.537033699765724) internal successors, (50352), 11098 states have internal predecessors, (50352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11099 states to 11099 states and 50352 transitions. [2021-06-05 05:23:05,146 INFO L78 Accepts]: Start accepts. Automaton has 11099 states and 50352 transitions. Word has length 33 [2021-06-05 05:23:05,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:05,146 INFO L482 AbstractCegarLoop]: Abstraction has 11099 states and 50352 transitions. [2021-06-05 05:23:05,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:05,147 INFO L276 IsEmpty]: Start isEmpty. Operand 11099 states and 50352 transitions. [2021-06-05 05:23:05,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:05,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:05,164 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, 1, 1, 1] [2021-06-05 05:23:05,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable515 [2021-06-05 05:23:05,365 INFO L430 AbstractCegarLoop]: === Iteration 334 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:05,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1589919774, now seen corresponding path program 253 times [2021-06-05 05:23:05,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:05,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575445137] [2021-06-05 05:23:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:05,531 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 05:23:05,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:05,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575445137] [2021-06-05 05:23:05,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575445137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:05,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403249824] [2021-06-05 05:23:05,532 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 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 05:23:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:05,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:05,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:05,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:05,710 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 28 treesize of output 12 [2021-06-05 05:23:05,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:05,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:05,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:05,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:15 [2021-06-05 05:23:05,799 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 05:23:05,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403249824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:05,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:05,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:23:05,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21105511] [2021-06-05 05:23:05,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:05,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:05,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:05,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:05,799 INFO L87 Difference]: Start difference. First operand 11099 states and 50352 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:23:07,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:07,145 INFO L93 Difference]: Finished difference Result 11811 states and 53056 transitions. [2021-06-05 05:23:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:23:07,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:23:07,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:07,178 INFO L225 Difference]: With dead ends: 11811 [2021-06-05 05:23:07,178 INFO L226 Difference]: Without dead ends: 11788 [2021-06-05 05:23:07,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 994.9ms TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:23:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11788 states. [2021-06-05 05:23:07,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11788 to 11111. [2021-06-05 05:23:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11111 states, 11110 states have (on average 4.535373537353736) internal successors, (50388), 11110 states have internal predecessors, (50388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11111 states to 11111 states and 50388 transitions. [2021-06-05 05:23:07,383 INFO L78 Accepts]: Start accepts. Automaton has 11111 states and 50388 transitions. Word has length 33 [2021-06-05 05:23:07,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:07,383 INFO L482 AbstractCegarLoop]: Abstraction has 11111 states and 50388 transitions. [2021-06-05 05:23:07,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:23:07,383 INFO L276 IsEmpty]: Start isEmpty. Operand 11111 states and 50388 transitions. [2021-06-05 05:23:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:07,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:07,402 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, 1, 1, 1] [2021-06-05 05:23:07,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:07,602 INFO L430 AbstractCegarLoop]: === Iteration 335 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:07,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1036654080, now seen corresponding path program 254 times [2021-06-05 05:23:07,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:07,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157320784] [2021-06-05 05:23:07,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:07,771 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 05:23:07,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:07,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157320784] [2021-06-05 05:23:07,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157320784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:07,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442253623] [2021-06-05 05:23:07,772 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 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 05:23:07,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:07,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:07,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:23:07,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:07,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:07,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:07,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:07,970 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 22 treesize of output 30 [2021-06-05 05:23:07,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:07,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:07,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:07,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:32 [2021-06-05 05:23:08,117 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 05:23:08,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442253623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:08,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:08,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:23:08,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746622238] [2021-06-05 05:23:08,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:08,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:08,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:08,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:08,118 INFO L87 Difference]: Start difference. First operand 11111 states and 50388 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:09,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:09,293 INFO L93 Difference]: Finished difference Result 11740 states and 52764 transitions. [2021-06-05 05:23:09,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:23:09,293 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:23:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:09,323 INFO L225 Difference]: With dead ends: 11740 [2021-06-05 05:23:09,323 INFO L226 Difference]: Without dead ends: 11689 [2021-06-05 05:23:09,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 839.3ms TimeCoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:23:09,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11689 states. [2021-06-05 05:23:09,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11689 to 11062. [2021-06-05 05:23:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11062 states, 11061 states have (on average 4.536479522647139) internal successors, (50178), 11061 states have internal predecessors, (50178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:09,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11062 states to 11062 states and 50178 transitions. [2021-06-05 05:23:09,606 INFO L78 Accepts]: Start accepts. Automaton has 11062 states and 50178 transitions. Word has length 33 [2021-06-05 05:23:09,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:09,606 INFO L482 AbstractCegarLoop]: Abstraction has 11062 states and 50178 transitions. [2021-06-05 05:23:09,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:09,606 INFO L276 IsEmpty]: Start isEmpty. Operand 11062 states and 50178 transitions. [2021-06-05 05:23:09,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:09,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:09,625 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, 1, 1, 1] [2021-06-05 05:23:09,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-05 05:23:09,826 INFO L430 AbstractCegarLoop]: === Iteration 336 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:09,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:09,826 INFO L82 PathProgramCache]: Analyzing trace with hash 889108678, now seen corresponding path program 255 times [2021-06-05 05:23:09,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:09,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760769886] [2021-06-05 05:23:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:09,990 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 05:23:09,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:09,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760769886] [2021-06-05 05:23:09,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760769886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:09,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210248355] [2021-06-05 05:23:09,990 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 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 05:23:10,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:23:10,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:10,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:10,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:10,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:10,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:23:10,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:10,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:10,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:10,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 05:23:10,358 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 05:23:10,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210248355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:10,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:10,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:23:10,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924650023] [2021-06-05 05:23:10,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:10,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:10,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:10,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:10,359 INFO L87 Difference]: Start difference. First operand 11062 states and 50178 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:11,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:11,745 INFO L93 Difference]: Finished difference Result 11625 states and 52377 transitions. [2021-06-05 05:23:11,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:23:11,745 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:23:11,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:11,771 INFO L225 Difference]: With dead ends: 11625 [2021-06-05 05:23:11,771 INFO L226 Difference]: Without dead ends: 11595 [2021-06-05 05:23:11,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1097.2ms TimeCoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:23:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11595 states. [2021-06-05 05:23:11,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11595 to 11041. [2021-06-05 05:23:11,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11041 states, 11040 states have (on average 4.536322463768116) internal successors, (50081), 11040 states have internal predecessors, (50081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11041 states to 11041 states and 50081 transitions. [2021-06-05 05:23:11,968 INFO L78 Accepts]: Start accepts. Automaton has 11041 states and 50081 transitions. Word has length 33 [2021-06-05 05:23:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:11,968 INFO L482 AbstractCegarLoop]: Abstraction has 11041 states and 50081 transitions. [2021-06-05 05:23:11,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:11,969 INFO L276 IsEmpty]: Start isEmpty. Operand 11041 states and 50081 transitions. [2021-06-05 05:23:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:11,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:11,989 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, 1, 1, 1] [2021-06-05 05:23:12,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-05 05:23:12,189 INFO L430 AbstractCegarLoop]: === Iteration 337 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:12,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:12,190 INFO L82 PathProgramCache]: Analyzing trace with hash -896373506, now seen corresponding path program 256 times [2021-06-05 05:23:12,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:12,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924561420] [2021-06-05 05:23:12,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:12,400 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 05:23:12,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:12,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924561420] [2021-06-05 05:23:12,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924561420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:12,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487353956] [2021-06-05 05:23:12,401 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 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 05:23:12,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:12,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:12,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:12,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:12,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:12,592 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 28 treesize of output 12 [2021-06-05 05:23:12,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:12,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:12,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:12,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:15 [2021-06-05 05:23:12,661 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 05:23:12,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487353956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:12,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:12,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:23:12,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908509142] [2021-06-05 05:23:12,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:12,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:12,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:12,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:12,662 INFO L87 Difference]: Start difference. First operand 11041 states and 50081 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 05:23:13,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:13,713 INFO L93 Difference]: Finished difference Result 11693 states and 52622 transitions. [2021-06-05 05:23:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:23:13,713 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 33 [2021-06-05 05:23:13,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:13,741 INFO L225 Difference]: With dead ends: 11693 [2021-06-05 05:23:13,742 INFO L226 Difference]: Without dead ends: 11664 [2021-06-05 05:23:13,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 851.9ms TimeCoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:23:13,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11664 states. [2021-06-05 05:23:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11664 to 11028. [2021-06-05 05:23:14,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11028 states, 11027 states have (on average 4.535775822979958) internal successors, (50016), 11027 states have internal predecessors, (50016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11028 states to 11028 states and 50016 transitions. [2021-06-05 05:23:14,049 INFO L78 Accepts]: Start accepts. Automaton has 11028 states and 50016 transitions. Word has length 33 [2021-06-05 05:23:14,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:14,049 INFO L482 AbstractCegarLoop]: Abstraction has 11028 states and 50016 transitions. [2021-06-05 05:23:14,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 05:23:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 11028 states and 50016 transitions. [2021-06-05 05:23:14,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:14,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:14,068 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, 1, 1, 1] [2021-06-05 05:23:14,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-05 05:23:14,269 INFO L430 AbstractCegarLoop]: === Iteration 338 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:14,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:14,269 INFO L82 PathProgramCache]: Analyzing trace with hash -60240186, now seen corresponding path program 257 times [2021-06-05 05:23:14,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:14,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621279851] [2021-06-05 05:23:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:14,464 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 05:23:14,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:14,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621279851] [2021-06-05 05:23:14,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621279851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:14,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668902126] [2021-06-05 05:23:14,465 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 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 05:23:14,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:23:14,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:14,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:14,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:14,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:14,663 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 28 treesize of output 12 [2021-06-05 05:23:14,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:14,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:14,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:14,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:15 [2021-06-05 05:23:14,756 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 05:23:14,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668902126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:14,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:14,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:23:14,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266925283] [2021-06-05 05:23:14,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:14,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:14,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:14,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:14,757 INFO L87 Difference]: Start difference. First operand 11028 states and 50016 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:23:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:16,149 INFO L93 Difference]: Finished difference Result 11531 states and 52041 transitions. [2021-06-05 05:23:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:23:16,149 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:23:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:16,177 INFO L225 Difference]: With dead ends: 11531 [2021-06-05 05:23:16,177 INFO L226 Difference]: Without dead ends: 11489 [2021-06-05 05:23:16,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1129.6ms TimeCoverageRelationStatistics Valid=237, Invalid=1743, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:23:16,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11489 states. [2021-06-05 05:23:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11489 to 11014. [2021-06-05 05:23:16,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11014 states, 11013 states have (on average 4.537455734132389) internal successors, (49971), 11013 states have internal predecessors, (49971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11014 states to 11014 states and 49971 transitions. [2021-06-05 05:23:16,378 INFO L78 Accepts]: Start accepts. Automaton has 11014 states and 49971 transitions. Word has length 33 [2021-06-05 05:23:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:16,378 INFO L482 AbstractCegarLoop]: Abstraction has 11014 states and 49971 transitions. [2021-06-05 05:23:16,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:23:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 11014 states and 49971 transitions. [2021-06-05 05:23:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:16,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:16,397 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, 1, 1, 1] [2021-06-05 05:23:16,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:16,597 INFO L430 AbstractCegarLoop]: === Iteration 339 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:16,598 INFO L82 PathProgramCache]: Analyzing trace with hash -2112639498, now seen corresponding path program 258 times [2021-06-05 05:23:16,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:16,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203111195] [2021-06-05 05:23:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:16,806 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 05:23:16,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:16,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203111195] [2021-06-05 05:23:16,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203111195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:16,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247739296] [2021-06-05 05:23:16,807 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 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 05:23:16,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:23:16,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:16,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:23:16,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:17,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:17,036 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 05:23:17,036 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 05:23:17,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:23:17,065 INFO L628 ElimStorePlain]: treesize reduction 67, result has 28.7 percent of original size [2021-06-05 05:23:17,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:17,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:27 [2021-06-05 05:23:17,191 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 05:23:17,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247739296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:17,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:17,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:23:17,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037634274] [2021-06-05 05:23:17,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:23:17,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:17,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:23:17,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:23:17,192 INFO L87 Difference]: Start difference. First operand 11014 states and 49971 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:19,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:19,843 INFO L93 Difference]: Finished difference Result 12819 states and 56045 transitions. [2021-06-05 05:23:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:23:19,844 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:23:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:19,872 INFO L225 Difference]: With dead ends: 12819 [2021-06-05 05:23:19,872 INFO L226 Difference]: Without dead ends: 12757 [2021-06-05 05:23:19,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 2298.5ms TimeCoverageRelationStatistics Valid=434, Invalid=3106, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:23:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12757 states. [2021-06-05 05:23:20,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12757 to 11029. [2021-06-05 05:23:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11029 states, 11028 states have (on average 4.541530649256438) internal successors, (50084), 11028 states have internal predecessors, (50084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11029 states to 11029 states and 50084 transitions. [2021-06-05 05:23:20,104 INFO L78 Accepts]: Start accepts. Automaton has 11029 states and 50084 transitions. Word has length 33 [2021-06-05 05:23:20,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:20,104 INFO L482 AbstractCegarLoop]: Abstraction has 11029 states and 50084 transitions. [2021-06-05 05:23:20,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:20,104 INFO L276 IsEmpty]: Start isEmpty. Operand 11029 states and 50084 transitions. [2021-06-05 05:23:20,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:20,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:20,125 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, 1, 1, 1] [2021-06-05 05:23:20,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 05:23:20,325 INFO L430 AbstractCegarLoop]: === Iteration 340 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:20,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:20,326 INFO L82 PathProgramCache]: Analyzing trace with hash -809366892, now seen corresponding path program 259 times [2021-06-05 05:23:20,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:20,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999265454] [2021-06-05 05:23:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:20,548 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 05:23:20,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:20,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999265454] [2021-06-05 05:23:20,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999265454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:20,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036843160] [2021-06-05 05:23:20,548 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 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 05:23:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:20,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:20,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:20,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:20,727 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 28 treesize of output 12 [2021-06-05 05:23:20,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:20,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:20,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:20,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:15 [2021-06-05 05:23:20,815 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 05:23:20,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036843160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:20,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:20,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:23:20,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652168292] [2021-06-05 05:23:20,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:20,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:20,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:20,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:20,816 INFO L87 Difference]: Start difference. First operand 11029 states and 50084 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:23:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:23,025 INFO L93 Difference]: Finished difference Result 12551 states and 55893 transitions. [2021-06-05 05:23:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:23:23,025 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:23:23,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:23,058 INFO L225 Difference]: With dead ends: 12551 [2021-06-05 05:23:23,058 INFO L226 Difference]: Without dead ends: 12519 [2021-06-05 05:23:23,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1852.7ms TimeCoverageRelationStatistics Valid=469, Invalid=2953, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:23:23,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12519 states. [2021-06-05 05:23:23,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12519 to 11154. [2021-06-05 05:23:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11154 states, 11153 states have (on average 4.535640634806779) internal successors, (50586), 11153 states have internal predecessors, (50586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11154 states to 11154 states and 50586 transitions. [2021-06-05 05:23:23,275 INFO L78 Accepts]: Start accepts. Automaton has 11154 states and 50586 transitions. Word has length 33 [2021-06-05 05:23:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:23,275 INFO L482 AbstractCegarLoop]: Abstraction has 11154 states and 50586 transitions. [2021-06-05 05:23:23,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:23:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 11154 states and 50586 transitions. [2021-06-05 05:23:23,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:23,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:23,294 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, 1, 1, 1] [2021-06-05 05:23:23,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-06-05 05:23:23,495 INFO L430 AbstractCegarLoop]: === Iteration 341 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:23,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:23,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1817206962, now seen corresponding path program 260 times [2021-06-05 05:23:23,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:23,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616312591] [2021-06-05 05:23:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:23,709 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 05:23:23,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:23,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616312591] [2021-06-05 05:23:23,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616312591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:23,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472465788] [2021-06-05 05:23:23,710 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 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 05:23:23,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:23,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:23,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:23:23,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:23,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:23,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:23,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:23,893 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 22 treesize of output 30 [2021-06-05 05:23:23,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:23,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:23,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:23,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:34 [2021-06-05 05:23:24,136 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 05:23:24,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472465788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:24,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:24,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:23:24,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040980309] [2021-06-05 05:23:24,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:24,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:24,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:24,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:24,137 INFO L87 Difference]: Start difference. First operand 11154 states and 50586 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:26,857 INFO L93 Difference]: Finished difference Result 13559 states and 58758 transitions. [2021-06-05 05:23:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:23:26,857 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:23:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:26,889 INFO L225 Difference]: With dead ends: 13559 [2021-06-05 05:23:26,889 INFO L226 Difference]: Without dead ends: 13523 [2021-06-05 05:23:26,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2182.0ms TimeCoverageRelationStatistics Valid=474, Invalid=3186, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:23:26,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13523 states. [2021-06-05 05:23:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13523 to 11208. [2021-06-05 05:23:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11208 states, 11207 states have (on average 4.5342196841259925) internal successors, (50815), 11207 states have internal predecessors, (50815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:27,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11208 states to 11208 states and 50815 transitions. [2021-06-05 05:23:27,118 INFO L78 Accepts]: Start accepts. Automaton has 11208 states and 50815 transitions. Word has length 33 [2021-06-05 05:23:27,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:27,118 INFO L482 AbstractCegarLoop]: Abstraction has 11208 states and 50815 transitions. [2021-06-05 05:23:27,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:27,118 INFO L276 IsEmpty]: Start isEmpty. Operand 11208 states and 50815 transitions. [2021-06-05 05:23:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:27,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:27,137 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, 1, 1, 1] [2021-06-05 05:23:27,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-05 05:23:27,338 INFO L430 AbstractCegarLoop]: === Iteration 342 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:27,338 INFO L82 PathProgramCache]: Analyzing trace with hash -862753412, now seen corresponding path program 261 times [2021-06-05 05:23:27,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:27,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026848936] [2021-06-05 05:23:27,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:27,498 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 05:23:27,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:27,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026848936] [2021-06-05 05:23:27,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026848936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:27,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742085723] [2021-06-05 05:23:27,499 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 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 05:23:27,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:23:27,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:27,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:27,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:27,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:27,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:23:27,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:27,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:27,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:27,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 05:23:27,854 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 05:23:27,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742085723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:27,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:27,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:23:27,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135814139] [2021-06-05 05:23:27,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:27,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:27,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:27,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:27,855 INFO L87 Difference]: Start difference. First operand 11208 states and 50815 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:29,761 INFO L93 Difference]: Finished difference Result 12209 states and 54551 transitions. [2021-06-05 05:23:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:23:29,761 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:23:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:29,788 INFO L225 Difference]: With dead ends: 12209 [2021-06-05 05:23:29,788 INFO L226 Difference]: Without dead ends: 12107 [2021-06-05 05:23:29,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1509.3ms TimeCoverageRelationStatistics Valid=353, Invalid=1903, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:23:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12107 states. [2021-06-05 05:23:29,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12107 to 11159. [2021-06-05 05:23:29,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11159 states, 11158 states have (on average 4.533428929915756) internal successors, (50584), 11158 states have internal predecessors, (50584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:29,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11159 states to 11159 states and 50584 transitions. [2021-06-05 05:23:29,994 INFO L78 Accepts]: Start accepts. Automaton has 11159 states and 50584 transitions. Word has length 33 [2021-06-05 05:23:29,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:29,994 INFO L482 AbstractCegarLoop]: Abstraction has 11159 states and 50584 transitions. [2021-06-05 05:23:29,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:29,994 INFO L276 IsEmpty]: Start isEmpty. Operand 11159 states and 50584 transitions. [2021-06-05 05:23:30,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:30,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:30,013 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, 1, 1, 1] [2021-06-05 05:23:30,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 05:23:30,214 INFO L430 AbstractCegarLoop]: === Iteration 343 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:30,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:30,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1010298814, now seen corresponding path program 262 times [2021-06-05 05:23:30,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:30,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114698691] [2021-06-05 05:23:30,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:30,373 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 05:23:30,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:30,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114698691] [2021-06-05 05:23:30,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114698691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:30,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501611864] [2021-06-05 05:23:30,374 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 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 05:23:30,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:30,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:30,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:30,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:30,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:30,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-05 05:23:30,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:30,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:30,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:30,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:15 [2021-06-05 05:23:30,622 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 05:23:30,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501611864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:30,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:30,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:23:30,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320300685] [2021-06-05 05:23:30,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:30,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:30,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:30,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:30,622 INFO L87 Difference]: Start difference. First operand 11159 states and 50584 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 05:23:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:31,937 INFO L93 Difference]: Finished difference Result 12023 states and 53915 transitions. [2021-06-05 05:23:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:23:31,937 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 33 [2021-06-05 05:23:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:31,967 INFO L225 Difference]: With dead ends: 12023 [2021-06-05 05:23:31,968 INFO L226 Difference]: Without dead ends: 11975 [2021-06-05 05:23:31,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 987.0ms TimeCoverageRelationStatistics Valid=303, Invalid=1859, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:23:31,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11975 states. [2021-06-05 05:23:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11975 to 11135. [2021-06-05 05:23:32,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11135 states, 11134 states have (on average 4.534219507813903) internal successors, (50484), 11134 states have internal predecessors, (50484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:32,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11135 states to 11135 states and 50484 transitions. [2021-06-05 05:23:32,181 INFO L78 Accepts]: Start accepts. Automaton has 11135 states and 50484 transitions. Word has length 33 [2021-06-05 05:23:32,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:32,181 INFO L482 AbstractCegarLoop]: Abstraction has 11135 states and 50484 transitions. [2021-06-05 05:23:32,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 05:23:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 11135 states and 50484 transitions. [2021-06-05 05:23:32,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:32,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:32,200 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, 1, 1, 1] [2021-06-05 05:23:32,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-06-05 05:23:32,400 INFO L430 AbstractCegarLoop]: === Iteration 344 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:32,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1139920728, now seen corresponding path program 263 times [2021-06-05 05:23:32,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:32,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876464837] [2021-06-05 05:23:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:32,625 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 05:23:32,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:32,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876464837] [2021-06-05 05:23:32,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876464837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:32,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202750568] [2021-06-05 05:23:32,626 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 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 05:23:32,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:23:32,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:32,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:32,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:32,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:32,783 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 29 treesize of output 13 [2021-06-05 05:23:32,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:32,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:32,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:32,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:16 [2021-06-05 05:23:32,894 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 05:23:32,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202750568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:32,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:32,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:23:32,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101001673] [2021-06-05 05:23:32,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:32,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:32,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:32,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:32,895 INFO L87 Difference]: Start difference. First operand 11135 states and 50484 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:23:35,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:35,001 INFO L93 Difference]: Finished difference Result 12233 states and 54568 transitions. [2021-06-05 05:23:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:23:35,001 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:23:35,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:35,030 INFO L225 Difference]: With dead ends: 12233 [2021-06-05 05:23:35,030 INFO L226 Difference]: Without dead ends: 12193 [2021-06-05 05:23:35,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1749.9ms TimeCoverageRelationStatistics Valid=452, Invalid=2628, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:23:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12193 states. [2021-06-05 05:23:35,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12193 to 11255. [2021-06-05 05:23:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11255 states, 11254 states have (on average 4.529234050115514) internal successors, (50972), 11254 states have internal predecessors, (50972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11255 states to 11255 states and 50972 transitions. [2021-06-05 05:23:35,243 INFO L78 Accepts]: Start accepts. Automaton has 11255 states and 50972 transitions. Word has length 33 [2021-06-05 05:23:35,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:35,243 INFO L482 AbstractCegarLoop]: Abstraction has 11255 states and 50972 transitions. [2021-06-05 05:23:35,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:23:35,243 INFO L276 IsEmpty]: Start isEmpty. Operand 11255 states and 50972 transitions. [2021-06-05 05:23:35,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:35,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:35,261 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, 1, 1, 1] [2021-06-05 05:23:35,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:35,462 INFO L430 AbstractCegarLoop]: === Iteration 345 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:35,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:35,462 INFO L82 PathProgramCache]: Analyzing trace with hash -528472714, now seen corresponding path program 264 times [2021-06-05 05:23:35,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:35,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030220476] [2021-06-05 05:23:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:35,727 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 05:23:35,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:35,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030220476] [2021-06-05 05:23:35,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030220476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:35,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530969378] [2021-06-05 05:23:35,728 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 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 05:23:35,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:23:35,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:35,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:35,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:35,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:35,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:23:35,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:35,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:35,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:35,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:23:36,109 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 05:23:36,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530969378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:36,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:36,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:23:36,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992212779] [2021-06-05 05:23:36,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:36,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:36,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:36,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:36,110 INFO L87 Difference]: Start difference. First operand 11255 states and 50972 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:36,356 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-06-05 05:23:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:39,846 INFO L93 Difference]: Finished difference Result 13399 states and 58370 transitions. [2021-06-05 05:23:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 05:23:39,847 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:23:39,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:39,879 INFO L225 Difference]: With dead ends: 13399 [2021-06-05 05:23:39,879 INFO L226 Difference]: Without dead ends: 13363 [2021-06-05 05:23:39,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 3162.6ms TimeCoverageRelationStatistics Valid=706, Invalid=4550, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:23:39,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13363 states. [2021-06-05 05:23:40,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13363 to 11211. [2021-06-05 05:23:40,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11211 states, 11210 states have (on average 4.529884032114183) internal successors, (50780), 11210 states have internal predecessors, (50780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11211 states to 11211 states and 50780 transitions. [2021-06-05 05:23:40,105 INFO L78 Accepts]: Start accepts. Automaton has 11211 states and 50780 transitions. Word has length 33 [2021-06-05 05:23:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:40,105 INFO L482 AbstractCegarLoop]: Abstraction has 11211 states and 50780 transitions. [2021-06-05 05:23:40,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 11211 states and 50780 transitions. [2021-06-05 05:23:40,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:40,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:40,125 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, 1, 1, 1] [2021-06-05 05:23:40,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 05:23:40,325 INFO L430 AbstractCegarLoop]: === Iteration 346 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:40,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1086534208, now seen corresponding path program 265 times [2021-06-05 05:23:40,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:40,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122406896] [2021-06-05 05:23:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:40,492 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 05:23:40,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:40,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122406896] [2021-06-05 05:23:40,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122406896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:40,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315307298] [2021-06-05 05:23:40,492 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 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 05:23:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:40,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:40,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:40,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:40,643 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 29 treesize of output 13 [2021-06-05 05:23:40,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:40,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:40,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:40,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:16 [2021-06-05 05:23:40,733 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 05:23:40,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315307298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:40,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:40,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:23:40,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053147299] [2021-06-05 05:23:40,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:40,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:40,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:40,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:40,733 INFO L87 Difference]: Start difference. First operand 11211 states and 50780 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 05:23:41,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:41,826 INFO L93 Difference]: Finished difference Result 11959 states and 53470 transitions. [2021-06-05 05:23:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:23:41,826 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 33 [2021-06-05 05:23:41,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:41,854 INFO L225 Difference]: With dead ends: 11959 [2021-06-05 05:23:41,854 INFO L226 Difference]: Without dead ends: 11886 [2021-06-05 05:23:41,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 893.9ms TimeCoverageRelationStatistics Valid=290, Invalid=1432, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:23:41,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11886 states. [2021-06-05 05:23:42,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11886 to 11217. [2021-06-05 05:23:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11217 states, 11216 states have (on average 4.529511412268188) internal successors, (50803), 11216 states have internal predecessors, (50803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:42,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11217 states to 11217 states and 50803 transitions. [2021-06-05 05:23:42,063 INFO L78 Accepts]: Start accepts. Automaton has 11217 states and 50803 transitions. Word has length 33 [2021-06-05 05:23:42,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:42,063 INFO L482 AbstractCegarLoop]: Abstraction has 11217 states and 50803 transitions. [2021-06-05 05:23:42,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 05:23:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 11217 states and 50803 transitions. [2021-06-05 05:23:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:42,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:42,081 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, 1, 1, 1] [2021-06-05 05:23:42,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:42,282 INFO L430 AbstractCegarLoop]: === Iteration 347 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:42,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2100590902, now seen corresponding path program 266 times [2021-06-05 05:23:42,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:42,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681597980] [2021-06-05 05:23:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:42,506 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 05:23:42,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:42,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681597980] [2021-06-05 05:23:42,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681597980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:42,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274547906] [2021-06-05 05:23:42,507 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 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 05:23:42,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:42,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:42,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:42,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:42,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:42,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:23:42,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:42,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:42,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:42,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 05:23:42,906 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 05:23:42,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274547906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:42,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:42,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:23:42,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444979997] [2021-06-05 05:23:42,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:42,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:42,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:42,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:42,907 INFO L87 Difference]: Start difference. First operand 11217 states and 50803 transitions. Second operand has 25 states, 25 states have (on average 2.04) 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 05:23:43,064 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-06-05 05:23:43,217 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 05:23:44,207 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-06-05 05:23:44,654 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-06-05 05:23:46,572 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 05:23:46,777 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2021-06-05 05:23:46,924 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-06-05 05:23:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:47,062 INFO L93 Difference]: Finished difference Result 13730 states and 59525 transitions. [2021-06-05 05:23:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:23:47,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) 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 33 [2021-06-05 05:23:47,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:47,096 INFO L225 Difference]: With dead ends: 13730 [2021-06-05 05:23:47,096 INFO L226 Difference]: Without dead ends: 13668 [2021-06-05 05:23:47,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 3750.5ms TimeCoverageRelationStatistics Valid=592, Invalid=3964, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:23:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13668 states. [2021-06-05 05:23:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13668 to 11370. [2021-06-05 05:23:47,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11370 states, 11369 states have (on average 4.527838860058052) internal successors, (51477), 11369 states have internal predecessors, (51477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11370 states to 11370 states and 51477 transitions. [2021-06-05 05:23:47,328 INFO L78 Accepts]: Start accepts. Automaton has 11370 states and 51477 transitions. Word has length 33 [2021-06-05 05:23:47,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:47,328 INFO L482 AbstractCegarLoop]: Abstraction has 11370 states and 51477 transitions. [2021-06-05 05:23:47,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) 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 05:23:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 11370 states and 51477 transitions. [2021-06-05 05:23:47,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:47,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:47,350 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, 1, 1, 1] [2021-06-05 05:23:47,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable538 [2021-06-05 05:23:47,550 INFO L430 AbstractCegarLoop]: === Iteration 348 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:47,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1735470066, now seen corresponding path program 267 times [2021-06-05 05:23:47,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:47,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150076266] [2021-06-05 05:23:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:47,775 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 05:23:47,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:47,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150076266] [2021-06-05 05:23:47,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150076266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:47,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804514555] [2021-06-05 05:23:47,776 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 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 05:23:47,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:23:47,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:47,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:47,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:47,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:47,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:47,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 05:23:47,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:47,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:47,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:47,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-06-05 05:23:48,160 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 05:23:48,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804514555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:48,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:48,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:23:48,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310643832] [2021-06-05 05:23:48,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:48,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:48,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:48,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:48,160 INFO L87 Difference]: Start difference. First operand 11370 states and 51477 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:51,167 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 05:23:51,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:51,760 INFO L93 Difference]: Finished difference Result 13740 states and 59514 transitions. [2021-06-05 05:23:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:23:51,760 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:23:51,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:51,794 INFO L225 Difference]: With dead ends: 13740 [2021-06-05 05:23:51,794 INFO L226 Difference]: Without dead ends: 13704 [2021-06-05 05:23:51,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 3278.8ms TimeCoverageRelationStatistics Valid=630, Invalid=3926, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:23:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13704 states. [2021-06-05 05:23:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13704 to 11273. [2021-06-05 05:23:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 11272 states have (on average 4.528566359119943) internal successors, (51046), 11272 states have internal predecessors, (51046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 51046 transitions. [2021-06-05 05:23:52,025 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 51046 transitions. Word has length 33 [2021-06-05 05:23:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:52,026 INFO L482 AbstractCegarLoop]: Abstraction has 11273 states and 51046 transitions. [2021-06-05 05:23:52,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:52,026 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 51046 transitions. [2021-06-05 05:23:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:52,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:52,044 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, 1, 1, 1] [2021-06-05 05:23:52,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-05 05:23:52,245 INFO L430 AbstractCegarLoop]: === Iteration 349 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:52,245 INFO L82 PathProgramCache]: Analyzing trace with hash -944490308, now seen corresponding path program 268 times [2021-06-05 05:23:52,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:52,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746639374] [2021-06-05 05:23:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:52,414 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 05:23:52,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:52,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746639374] [2021-06-05 05:23:52,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746639374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:52,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299185083] [2021-06-05 05:23:52,414 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 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 05:23:52,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:52,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:52,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:52,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:52,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:52,570 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 29 treesize of output 13 [2021-06-05 05:23:52,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:52,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:52,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:52,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:16 [2021-06-05 05:23:52,661 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 05:23:52,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299185083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:52,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:52,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:23:52,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375628599] [2021-06-05 05:23:52,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:52,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:52,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:52,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:52,662 INFO L87 Difference]: Start difference. First operand 11273 states and 51046 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 05:23:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:53,833 INFO L93 Difference]: Finished difference Result 12116 states and 54020 transitions. [2021-06-05 05:23:53,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:23:53,833 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 33 [2021-06-05 05:23:53,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:53,862 INFO L225 Difference]: With dead ends: 12116 [2021-06-05 05:23:53,862 INFO L226 Difference]: Without dead ends: 12026 [2021-06-05 05:23:53,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 908.6ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:23:53,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12026 states. [2021-06-05 05:23:54,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12026 to 11233. [2021-06-05 05:23:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11233 states, 11232 states have (on average 4.529647435897436) internal successors, (50877), 11232 states have internal predecessors, (50877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11233 states to 11233 states and 50877 transitions. [2021-06-05 05:23:54,077 INFO L78 Accepts]: Start accepts. Automaton has 11233 states and 50877 transitions. Word has length 33 [2021-06-05 05:23:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:54,077 INFO L482 AbstractCegarLoop]: Abstraction has 11233 states and 50877 transitions. [2021-06-05 05:23:54,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 05:23:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 11233 states and 50877 transitions. [2021-06-05 05:23:54,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:54,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:54,097 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, 1, 1, 1] [2021-06-05 05:23:54,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 05:23:54,298 INFO L430 AbstractCegarLoop]: === Iteration 350 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:54,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1675144074, now seen corresponding path program 269 times [2021-06-05 05:23:54,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:54,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667371971] [2021-06-05 05:23:54,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:54,517 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 05:23:54,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:54,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667371971] [2021-06-05 05:23:54,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667371971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:54,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193580749] [2021-06-05 05:23:54,517 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 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 05:23:54,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:23:54,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:54,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:23:54,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:54,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:54,774 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 29 treesize of output 13 [2021-06-05 05:23:54,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:54,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:54,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:54,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:16 [2021-06-05 05:23:54,868 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 05:23:54,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193580749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:54,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:54,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:23:54,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113243379] [2021-06-05 05:23:54,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:54,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:54,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:54,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:54,869 INFO L87 Difference]: Start difference. First operand 11233 states and 50877 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:23:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:56,918 INFO L93 Difference]: Finished difference Result 12612 states and 55585 transitions. [2021-06-05 05:23:56,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:23:56,918 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 05:23:56,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:56,951 INFO L225 Difference]: With dead ends: 12612 [2021-06-05 05:23:56,951 INFO L226 Difference]: Without dead ends: 12572 [2021-06-05 05:23:56,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1663.4ms TimeCoverageRelationStatistics Valid=258, Invalid=1998, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:23:56,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12572 states. [2021-06-05 05:23:57,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12572 to 11236. [2021-06-05 05:23:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11236 states, 11235 states have (on average 4.528971962616822) internal successors, (50883), 11235 states have internal predecessors, (50883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11236 states to 11236 states and 50883 transitions. [2021-06-05 05:23:57,186 INFO L78 Accepts]: Start accepts. Automaton has 11236 states and 50883 transitions. Word has length 33 [2021-06-05 05:23:57,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:57,186 INFO L482 AbstractCegarLoop]: Abstraction has 11236 states and 50883 transitions. [2021-06-05 05:23:57,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 05:23:57,186 INFO L276 IsEmpty]: Start isEmpty. Operand 11236 states and 50883 transitions. [2021-06-05 05:23:57,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:23:57,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:57,207 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, 1, 1, 1] [2021-06-05 05:23:57,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-05 05:23:57,408 INFO L430 AbstractCegarLoop]: === Iteration 351 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:23:57,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:57,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1685000792, now seen corresponding path program 270 times [2021-06-05 05:23:57,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:57,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871713069] [2021-06-05 05:23:57,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:57,622 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 05:23:57,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:57,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871713069] [2021-06-05 05:23:57,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871713069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:57,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178618737] [2021-06-05 05:23:57,623 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 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 05:23:57,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:23:57,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:57,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:23:57,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:57,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:57,786 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 05:23:57,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:57,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:57,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:57,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:23:57,966 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 05:23:57,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178618737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:57,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:57,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:23:57,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097291405] [2021-06-05 05:23:57,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:23:57,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:57,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:23:57,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:23:57,967 INFO L87 Difference]: Start difference. First operand 11236 states and 50883 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) 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 05:24:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:00,357 INFO L93 Difference]: Finished difference Result 12070 states and 54004 transitions. [2021-06-05 05:24:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:24:00,357 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) 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 33 [2021-06-05 05:24:00,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:00,387 INFO L225 Difference]: With dead ends: 12070 [2021-06-05 05:24:00,387 INFO L226 Difference]: Without dead ends: 12032 [2021-06-05 05:24:00,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1980.1ms TimeCoverageRelationStatistics Valid=381, Invalid=3041, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:24:00,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12032 states. [2021-06-05 05:24:00,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12032 to 11221. [2021-06-05 05:24:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11221 states, 11220 states have (on average 4.530659536541889) internal successors, (50834), 11220 states have internal predecessors, (50834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:00,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11221 states to 11221 states and 50834 transitions. [2021-06-05 05:24:00,609 INFO L78 Accepts]: Start accepts. Automaton has 11221 states and 50834 transitions. Word has length 33 [2021-06-05 05:24:00,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:00,609 INFO L482 AbstractCegarLoop]: Abstraction has 11221 states and 50834 transitions. [2021-06-05 05:24:00,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) 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 05:24:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 11221 states and 50834 transitions. [2021-06-05 05:24:00,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:24:00,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:00,630 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, 1, 1, 1] [2021-06-05 05:24:00,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:00,830 INFO L430 AbstractCegarLoop]: === Iteration 352 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:00,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:00,830 INFO L82 PathProgramCache]: Analyzing trace with hash -85868262, now seen corresponding path program 271 times [2021-06-05 05:24:00,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:00,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105799845] [2021-06-05 05:24:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:00,990 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 05:24:00,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:00,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105799845] [2021-06-05 05:24:00,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105799845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:00,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446894628] [2021-06-05 05:24:00,990 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 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 05:24:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:01,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:24:01,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:01,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:01,158 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 28 treesize of output 12 [2021-06-05 05:24:01,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:01,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:01,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:01,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:15 [2021-06-05 05:24:01,243 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 05:24:01,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446894628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:01,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:01,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:24:01,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454185565] [2021-06-05 05:24:01,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:24:01,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:01,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:24:01,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:24:01,244 INFO L87 Difference]: Start difference. First operand 11221 states and 50834 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:24:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:02,536 INFO L93 Difference]: Finished difference Result 12499 states and 55871 transitions. [2021-06-05 05:24:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:24:02,536 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 05:24:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:02,565 INFO L225 Difference]: With dead ends: 12499 [2021-06-05 05:24:02,565 INFO L226 Difference]: Without dead ends: 12433 [2021-06-05 05:24:02,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1080.8ms TimeCoverageRelationStatistics Valid=315, Invalid=2037, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:24:02,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12433 states. [2021-06-05 05:24:02,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12433 to 11269. [2021-06-05 05:24:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 4.533102591409301) internal successors, (51079), 11268 states have internal predecessors, (51079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 51079 transitions. [2021-06-05 05:24:02,775 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 51079 transitions. Word has length 33 [2021-06-05 05:24:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:02,775 INFO L482 AbstractCegarLoop]: Abstraction has 11269 states and 51079 transitions. [2021-06-05 05:24:02,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 05:24:02,775 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 51079 transitions. [2021-06-05 05:24:02,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:24:02,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:02,794 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, 1, 1, 1] [2021-06-05 05:24:02,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 05:24:02,995 INFO L430 AbstractCegarLoop]: === Iteration 353 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:02,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:02,995 INFO L82 PathProgramCache]: Analyzing trace with hash 566381842, now seen corresponding path program 272 times [2021-06-05 05:24:02,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:02,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150633513] [2021-06-05 05:24:02,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:03,143 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 05:24:03,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:03,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150633513] [2021-06-05 05:24:03,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150633513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:03,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164792447] [2021-06-05 05:24:03,143 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 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 05:24:03,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:03,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:03,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:24:03,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:03,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:03,348 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 05:24:03,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:03,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:03,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:03,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-05 05:24:03,459 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 05:24:03,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164792447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:03,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:03,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 05:24:03,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472295035] [2021-06-05 05:24:03,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:24:03,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:03,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:24:03,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:24:03,460 INFO L87 Difference]: Start difference. First operand 11269 states and 51079 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:04,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:04,594 INFO L93 Difference]: Finished difference Result 11903 states and 53574 transitions. [2021-06-05 05:24:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:04,594 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:24:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:04,621 INFO L225 Difference]: With dead ends: 11903 [2021-06-05 05:24:04,621 INFO L226 Difference]: Without dead ends: 11874 [2021-06-05 05:24:04,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 850.7ms TimeCoverageRelationStatistics Valid=207, Invalid=1515, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:24:04,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11874 states. [2021-06-05 05:24:04,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11874 to 11254. [2021-06-05 05:24:04,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11254 states, 11253 states have (on average 4.534079800941971) internal successors, (51022), 11253 states have internal predecessors, (51022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11254 states to 11254 states and 51022 transitions. [2021-06-05 05:24:04,816 INFO L78 Accepts]: Start accepts. Automaton has 11254 states and 51022 transitions. Word has length 33 [2021-06-05 05:24:04,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:04,816 INFO L482 AbstractCegarLoop]: Abstraction has 11254 states and 51022 transitions. [2021-06-05 05:24:04,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:04,816 INFO L276 IsEmpty]: Start isEmpty. Operand 11254 states and 51022 transitions. [2021-06-05 05:24:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:24:04,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:04,835 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, 1, 1, 1] Received shutdown request... [2021-06-05 05:24:05,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-06-05 05:24:05,036 INFO L430 AbstractCegarLoop]: === Iteration 354 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:05,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1822123194, now seen corresponding path program 273 times [2021-06-05 05:24:05,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:05,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852046233] [2021-06-05 05:24:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2021-06-05 05:24:05,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271553338] [2021-06-05 05:24:05,039 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 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 05:24:05,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:24:05,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:05,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:24:05,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:05,080 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-06-05 05:24:05,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:05,285 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 05:24:05,286 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:24:05,288 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 05:24:05,288 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:24:05 BasicIcfg [2021-06-05 05:24:05,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:24:05,289 INFO L168 Benchmark]: Toolchain (without parser) took 774778.15 ms. Allocated memory was 339.7 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 318.9 MB in the beginning and 2.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 407.3 MB. Max. memory is 16.0 GB. [2021-06-05 05:24:05,289 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 339.7 MB. Free memory was 320.2 MB in the beginning and 320.1 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:24:05,289 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.29 ms. Allocated memory is still 339.7 MB. Free memory was 318.9 MB in the beginning and 317.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:24:05,289 INFO L168 Benchmark]: Boogie Preprocessor took 15.78 ms. Allocated memory is still 339.7 MB. Free memory was 317.4 MB in the beginning and 316.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:24:05,289 INFO L168 Benchmark]: RCFGBuilder took 371.61 ms. Allocated memory is still 339.7 MB. Free memory was 316.3 MB in the beginning and 299.8 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 05:24:05,289 INFO L168 Benchmark]: TraceAbstraction took 774358.84 ms. Allocated memory was 339.7 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 299.3 MB in the beginning and 2.0 GB in the end (delta: -1.7 GB). Peak memory consumption was 388.4 MB. Max. memory is 16.0 GB. [2021-06-05 05:24:05,289 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 0.15 ms. Allocated memory is still 339.7 MB. Free memory was 320.2 MB in the beginning and 320.1 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.29 ms. Allocated memory is still 339.7 MB. Free memory was 318.9 MB in the beginning and 317.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.78 ms. Allocated memory is still 339.7 MB. Free memory was 317.4 MB in the beginning and 316.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 371.61 ms. Allocated memory is still 339.7 MB. Free memory was 316.3 MB in the beginning and 299.8 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 774358.84 ms. Allocated memory was 339.7 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 299.3 MB in the beginning and 2.0 GB in the end (delta: -1.7 GB). Peak memory consumption was 388.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: 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 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 0ms.. - 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 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 0ms.. - TimeoutResultAtElement [Line: 90]: 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 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 0ms.. - TimeoutResultAtElement [Line: 53]: 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 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 0ms.. - TimeoutResultAtElement [Line: 53]: 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 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 0ms.. - TimeoutResultAtElement [Line: 50]: 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 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 0ms.. - TimeoutResultAtElement [Line: 90]: 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 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 0ms.. - 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 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 0ms.. - TimeoutResultAtElement [Line: 87]: 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 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 0ms.. - TimeoutResultAtElement [Line: 87]: 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 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 0ms.. - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 774138.0ms, OverallIterations: 354, TraceHistogramMax: 2, EmptinessCheckTime: 3839.0ms, AutomataDifference: 489102.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 58.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 43905 SDtfs, 156362 SDslu, 555298 SDs, 0 SdLazy, 357138 SolverSat, 25605 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 140772.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22083 GetRequests, 7494 SyntacticMatches, 757 SemanticMatches, 13832 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161117 ImplicationChecksByTransitivity, 402735.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11370occurred in iteration=347, InterpolantAutomatonStates: 11351, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 42936.7ms AutomataMinimizationTime, 353 MinimizatonAttempts, 304497 StatesRemovedByMinimization, 353 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2324.9ms SsaConstructionTime, 5352.5ms SatisfiabilityAnalysisTime, 150697.4ms InterpolantComputationTime, 22225 NumberOfCodeBlocks, 22225 NumberOfCodeBlocksAsserted, 1161 NumberOfCheckSat, 21522 ConstructedInterpolants, 63 QuantifiedInterpolants, 380232 SizeOfPredicates, 4349 NumberOfNonLiveVariables, 48034 ConjunctsInSsa, 12673 ConjunctsInUnsatCore, 703 InterpolantComputations, 5 PerfectInterpolantSequences, 43/4189 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