/usr/bin/java -Xmx8000000000 -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/bench/exp3x3-opt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 19:48:23,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 19:48:23,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 19:48:23,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-12 19:48:23,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-12 19:48:23,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-12 19:48:23,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-12 19:48:23,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-12 19:48:23,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-12 19:48:23,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-12 19:48:23,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-12 19:48:23,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-12 19:48:23,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-12 19:48:23,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-12 19:48:23,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-12 19:48:23,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-12 19:48:23,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-12 19:48:23,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-12 19:48:23,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-12 19:48:23,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-12 19:48:23,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-12 19:48:23,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-12 19:48:23,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-12 19:48:23,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-12 19:48:23,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-12 19:48:23,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-12 19:48:23,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-12 19:48:23,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-12 19:48:23,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-12 19:48:23,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-12 19:48:23,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-12 19:48:23,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-12 19:48:23,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-12 19:48:23,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-12 19:48:23,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-12 19:48:23,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-12 19:48:23,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-12 19:48:23,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-12 19:48:23,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 19:48:23,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 19:48:23,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 19:48:23,326 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 [2021-06-12 19:48:23,362 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 19:48:23,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 19:48:23,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 19:48:23,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 19:48:23,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 19:48:23,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 19:48:23,365 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 19:48:23,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 19:48:23,366 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 19:48:23,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 19:48:23,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 19:48:23,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 19:48:23,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 19:48:23,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 19:48:23,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 19:48:23,367 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 19:48:23,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 19:48:23,368 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 19:48:23,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 19:48:23,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 19:48:23,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 19:48:23,368 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 19:48:23,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 19:48:23,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:48:23,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 19:48:23,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 19:48:23,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 19:48:23,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 19:48:23,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 19:48:23,370 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 19:48:23,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 19:48:23,370 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 19:48:23,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 19:48:23,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 19:48:23,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 19:48:23,655 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 19:48:23,656 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 19:48:23,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl [2021-06-12 19:48:23,657 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl' [2021-06-12 19:48:23,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 19:48:23,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 19:48:23,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 19:48:23,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 19:48:23,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 19:48:23,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:23" (1/1) ... [2021-06-12 19:48:23,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:23" (1/1) ... [2021-06-12 19:48:23,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 19:48:23,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 19:48:23,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 19:48:23,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 19:48:23,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:23" (1/1) ... [2021-06-12 19:48:23,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:23" (1/1) ... [2021-06-12 19:48:23,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:23" (1/1) ... [2021-06-12 19:48:23,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:23" (1/1) ... [2021-06-12 19:48:23,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:23" (1/1) ... [2021-06-12 19:48:23,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:23" (1/1) ... [2021-06-12 19:48:23,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:23" (1/1) ... [2021-06-12 19:48:23,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 19:48:23,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 19:48:23,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 19:48:23,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 19:48:23,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:23" (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 [2021-06-12 19:48:23,783 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 19:48:23,783 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 19:48:23,783 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 19:48:23,783 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 19:48:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 19:48:23,784 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 19:48:23,784 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 19:48:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 19:48:23,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 19:48:23,784 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 19:48:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 19:48:23,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 19:48:23,785 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-12 19:48:23,785 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-12 19:48:23,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-12 19:48:23,785 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-12 19:48:23,785 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-12 19:48:23,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-12 19:48:23,786 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-06-12 19:48:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-06-12 19:48:23,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-06-12 19:48:23,787 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 19:48:23,939 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 19:48:23,939 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-12 19:48:23,940 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-12 19:48:23,940 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-12 19:48:23,940 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-12 19:48:23,941 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-06-12 19:48:23,941 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-06-12 19:48:23,941 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-06-12 19:48:23,942 INFO L202 PluginConnector]: Adding new model exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:48:23 BoogieIcfgContainer [2021-06-12 19:48:23,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 19:48:23,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 19:48:23,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 19:48:23,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 19:48:23,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:48:23" (1/2) ... [2021-06-12 19:48:23,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7edbbbcb and model type exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 07:48:23, skipping insertion in model container [2021-06-12 19:48:23,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:48:23" (2/2) ... [2021-06-12 19:48:23,949 INFO L111 eAbstractionObserver]: Analyzing ICFG exp3x3-opt.wvr.bpl [2021-06-12 19:48:23,954 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 19:48:23,954 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 19:48:23,954 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 19:48:23,954 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 19:48:24,025 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-06-12 19:48:24,054 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-06-12 19:48:24,069 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 19:48:24,070 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 19:48:24,070 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 19:48:24,070 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 19:48:24,070 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 19:48:24,070 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 19:48:24,070 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 19:48:24,070 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 19:48:24,091 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 35 transitions, 118 flow [2021-06-12 19:48:24,144 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 195 states, 193 states have (on average 5.341968911917099) internal successors, (1031), 194 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:24,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 5.341968911917099) internal successors, (1031), 194 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:24,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:48:24,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:24,161 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:24,162 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:24,170 INFO L82 PathProgramCache]: Analyzing trace with hash 336800480, now seen corresponding path program 1 times [2021-06-12 19:48:24,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:24,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227838815] [2021-06-12 19:48:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:24,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:24,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227838815] [2021-06-12 19:48:24,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227838815] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:48:24,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:48:24,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 19:48:24,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288734721] [2021-06-12 19:48:24,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 19:48:24,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:24,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 19:48:24,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 19:48:24,387 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 5.341968911917099) internal successors, (1031), 194 states have internal predecessors, (1031), 0 states have call successors, (0), 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 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:24,438 INFO L93 Difference]: Finished difference Result 382 states and 2054 transitions. [2021-06-12 19:48:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 19:48:24,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:48:24,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:24,460 INFO L225 Difference]: With dead ends: 382 [2021-06-12 19:48:24,460 INFO L226 Difference]: Without dead ends: 304 [2021-06-12 19:48:24,462 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 19:48:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-12 19:48:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2021-06-12 19:48:24,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 5.458745874587459) internal successors, (1654), 303 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1654 transitions. [2021-06-12 19:48:24,541 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1654 transitions. Word has length 21 [2021-06-12 19:48:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:24,541 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 1654 transitions. [2021-06-12 19:48:24,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1654 transitions. [2021-06-12 19:48:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:48:24,550 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:24,550 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:24,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 19:48:24,550 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:24,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:24,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1957873019, now seen corresponding path program 1 times [2021-06-12 19:48:24,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:24,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874092901] [2021-06-12 19:48:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:48:24,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:24,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874092901] [2021-06-12 19:48:24,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874092901] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:48:24,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:48:24,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 19:48:24,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923580999] [2021-06-12 19:48:24,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 19:48:24,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:24,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 19:48:24,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 19:48:24,621 INFO L87 Difference]: Start difference. First operand 304 states and 1654 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:24,648 INFO L93 Difference]: Finished difference Result 551 states and 3079 transitions. [2021-06-12 19:48:24,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 19:48:24,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:48:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:24,655 INFO L225 Difference]: With dead ends: 551 [2021-06-12 19:48:24,655 INFO L226 Difference]: Without dead ends: 502 [2021-06-12 19:48:24,657 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 19:48:24,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-12 19:48:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 502. [2021-06-12 19:48:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 5.598802395209581) internal successors, (2805), 501 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 2805 transitions. [2021-06-12 19:48:24,699 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 2805 transitions. Word has length 22 [2021-06-12 19:48:24,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:24,700 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 2805 transitions. [2021-06-12 19:48:24,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 2805 transitions. [2021-06-12 19:48:24,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:48:24,703 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:24,703 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:24,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 19:48:24,703 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:24,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:24,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1560108314, now seen corresponding path program 1 times [2021-06-12 19:48:24,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:24,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838591779] [2021-06-12 19:48:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:48:24,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:24,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838591779] [2021-06-12 19:48:24,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838591779] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:48:24,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:48:24,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 19:48:24,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047983758] [2021-06-12 19:48:24,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 19:48:24,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:24,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 19:48:24,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 19:48:24,766 INFO L87 Difference]: Start difference. First operand 502 states and 2805 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:24,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:24,789 INFO L93 Difference]: Finished difference Result 989 states and 5577 transitions. [2021-06-12 19:48:24,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 19:48:24,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:48:24,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:24,799 INFO L225 Difference]: With dead ends: 989 [2021-06-12 19:48:24,799 INFO L226 Difference]: Without dead ends: 859 [2021-06-12 19:48:24,799 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 19:48:24,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-06-12 19:48:24,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2021-06-12 19:48:24,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 5.6678321678321675) internal successors, (4863), 858 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 4863 transitions. [2021-06-12 19:48:24,831 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 4863 transitions. Word has length 23 [2021-06-12 19:48:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:24,832 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 4863 transitions. [2021-06-12 19:48:24,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 4863 transitions. [2021-06-12 19:48:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:48:24,835 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:24,835 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:24,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 19:48:24,836 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1404106583, now seen corresponding path program 1 times [2021-06-12 19:48:24,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:24,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142466442] [2021-06-12 19:48:24,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:48:24,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:24,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142466442] [2021-06-12 19:48:24,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142466442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:24,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604720968] [2021-06-12 19:48:24,901 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 [2021-06-12 19:48:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:24,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 19:48:24,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:48:25,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604720968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:25,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:25,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-12 19:48:25,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90930188] [2021-06-12 19:48:25,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:48:25,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:25,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:48:25,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:48:25,134 INFO L87 Difference]: Start difference. First operand 859 states and 4863 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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) [2021-06-12 19:48:25,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:25,295 INFO L93 Difference]: Finished difference Result 2168 states and 12284 transitions. [2021-06-12 19:48:25,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:48:25,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 24 [2021-06-12 19:48:25,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:25,304 INFO L225 Difference]: With dead ends: 2168 [2021-06-12 19:48:25,305 INFO L226 Difference]: Without dead ends: 1000 [2021-06-12 19:48:25,305 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:48:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-06-12 19:48:25,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 614. [2021-06-12 19:48:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 5.634584013050571) internal successors, (3454), 613 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 3454 transitions. [2021-06-12 19:48:25,333 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 3454 transitions. Word has length 24 [2021-06-12 19:48:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:25,333 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 3454 transitions. [2021-06-12 19:48:25,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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) [2021-06-12 19:48:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 3454 transitions. [2021-06-12 19:48:25,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:48:25,336 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:25,336 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:25,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:25,559 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:25,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:25,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1358128455, now seen corresponding path program 1 times [2021-06-12 19:48:25,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:25,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935797767] [2021-06-12 19:48:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:48:25,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:25,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935797767] [2021-06-12 19:48:25,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935797767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:25,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566592349] [2021-06-12 19:48:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 19:48:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:25,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 19:48:25,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:48:25,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566592349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:25,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:25,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-12 19:48:25,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539570397] [2021-06-12 19:48:25,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:48:25,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:25,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:48:25,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:48:25,754 INFO L87 Difference]: Start difference. First operand 614 states and 3454 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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) [2021-06-12 19:48:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:25,893 INFO L93 Difference]: Finished difference Result 1659 states and 9450 transitions. [2021-06-12 19:48:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:48:25,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 24 [2021-06-12 19:48:25,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:25,902 INFO L225 Difference]: With dead ends: 1659 [2021-06-12 19:48:25,902 INFO L226 Difference]: Without dead ends: 930 [2021-06-12 19:48:25,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:48:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-12 19:48:25,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 760. [2021-06-12 19:48:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 5.664031620553359) internal successors, (4299), 759 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 4299 transitions. [2021-06-12 19:48:25,942 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 4299 transitions. Word has length 24 [2021-06-12 19:48:25,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:25,943 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 4299 transitions. [2021-06-12 19:48:25,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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) [2021-06-12 19:48:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 4299 transitions. [2021-06-12 19:48:25,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:48:25,948 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:25,950 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:26,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:26,169 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:26,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:26,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1283985542, now seen corresponding path program 1 times [2021-06-12 19:48:26,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:26,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845077411] [2021-06-12 19:48:26,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:48:26,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:26,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845077411] [2021-06-12 19:48:26,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845077411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:26,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657425595] [2021-06-12 19:48:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 19:48:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:26,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 19:48:26,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:48:26,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657425595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:26,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:26,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-12 19:48:26,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087759240] [2021-06-12 19:48:26,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:48:26,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:26,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:48:26,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:48:26,314 INFO L87 Difference]: Start difference. First operand 760 states and 4299 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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) [2021-06-12 19:48:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:26,424 INFO L93 Difference]: Finished difference Result 2539 states and 14502 transitions. [2021-06-12 19:48:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:48:26,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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 25 [2021-06-12 19:48:26,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:26,438 INFO L225 Difference]: With dead ends: 2539 [2021-06-12 19:48:26,439 INFO L226 Difference]: Without dead ends: 1460 [2021-06-12 19:48:26,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:48:26,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-06-12 19:48:26,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1460. [2021-06-12 19:48:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 5.748457847840987) internal successors, (8387), 1459 states have internal predecessors, (8387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 8387 transitions. [2021-06-12 19:48:26,493 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 8387 transitions. Word has length 25 [2021-06-12 19:48:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:26,495 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 8387 transitions. [2021-06-12 19:48:26,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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) [2021-06-12 19:48:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 8387 transitions. [2021-06-12 19:48:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 19:48:26,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:26,502 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:26,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:26,725 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:26,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:26,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1790951632, now seen corresponding path program 1 times [2021-06-12 19:48:26,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:26,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372824883] [2021-06-12 19:48:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:48:26,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:26,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372824883] [2021-06-12 19:48:26,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372824883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:26,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113604292] [2021-06-12 19:48:26,776 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 [2021-06-12 19:48:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:26,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:48:26,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:48:26,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113604292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:26,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:26,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-06-12 19:48:26,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583312964] [2021-06-12 19:48:26,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:48:26,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:26,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:48:26,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:48:26,942 INFO L87 Difference]: Start difference. First operand 1460 states and 8387 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2021-06-12 19:48:27,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:27,145 INFO L93 Difference]: Finished difference Result 7036 states and 40197 transitions. [2021-06-12 19:48:27,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:48:27,146 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 27 [2021-06-12 19:48:27,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:27,211 INFO L225 Difference]: With dead ends: 7036 [2021-06-12 19:48:27,211 INFO L226 Difference]: Without dead ends: 5971 [2021-06-12 19:48:27,211 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:48:27,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2021-06-12 19:48:27,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 3455. [2021-06-12 19:48:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 3454 states have (on average 6.335552982049798) internal successors, (21883), 3454 states have internal predecessors, (21883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:27,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 21883 transitions. [2021-06-12 19:48:27,437 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 21883 transitions. Word has length 27 [2021-06-12 19:48:27,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:27,437 INFO L482 AbstractCegarLoop]: Abstraction has 3455 states and 21883 transitions. [2021-06-12 19:48:27,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2021-06-12 19:48:27,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 21883 transitions. [2021-06-12 19:48:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 19:48:27,475 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:27,475 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:27,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:27,689 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:27,689 INFO L82 PathProgramCache]: Analyzing trace with hash -97672488, now seen corresponding path program 2 times [2021-06-12 19:48:27,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:27,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67095251] [2021-06-12 19:48:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:48:27,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:27,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67095251] [2021-06-12 19:48:27,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67095251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:27,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108572483] [2021-06-12 19:48:27,730 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 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 [2021-06-12 19:48:27,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:48:27,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:27,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:48:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:48:27,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108572483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:27,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:27,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-06-12 19:48:27,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643900676] [2021-06-12 19:48:27,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:48:27,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:27,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:48:27,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:48:27,957 INFO L87 Difference]: Start difference. First operand 3455 states and 21883 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2021-06-12 19:48:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:28,205 INFO L93 Difference]: Finished difference Result 12126 states and 75417 transitions. [2021-06-12 19:48:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:48:28,206 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 27 [2021-06-12 19:48:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:28,272 INFO L225 Difference]: With dead ends: 12126 [2021-06-12 19:48:28,273 INFO L226 Difference]: Without dead ends: 10635 [2021-06-12 19:48:28,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:48:28,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10635 states. [2021-06-12 19:48:28,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10635 to 6709. [2021-06-12 19:48:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6709 states, 6708 states have (on average 6.719886702444842) internal successors, (45077), 6708 states have internal predecessors, (45077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 45077 transitions. [2021-06-12 19:48:28,797 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 45077 transitions. Word has length 27 [2021-06-12 19:48:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:28,798 INFO L482 AbstractCegarLoop]: Abstraction has 6709 states and 45077 transitions. [2021-06-12 19:48:28,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2021-06-12 19:48:28,803 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 45077 transitions. [2021-06-12 19:48:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 19:48:28,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:28,863 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:29,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:29,079 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:29,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:29,080 INFO L82 PathProgramCache]: Analyzing trace with hash 329078829, now seen corresponding path program 3 times [2021-06-12 19:48:29,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:29,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094135809] [2021-06-12 19:48:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:48:29,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:29,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094135809] [2021-06-12 19:48:29,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094135809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:29,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876740428] [2021-06-12 19:48:29,118 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 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 [2021-06-12 19:48:29,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:48:29,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:29,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:48:29,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:48:29,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876740428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:29,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:29,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:48:29,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51446188] [2021-06-12 19:48:29,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:48:29,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:29,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:48:29,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:48:29,269 INFO L87 Difference]: Start difference. First operand 6709 states and 45077 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-12 19:48:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:29,477 INFO L93 Difference]: Finished difference Result 10641 states and 67958 transitions. [2021-06-12 19:48:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:48:29,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 28 [2021-06-12 19:48:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:29,526 INFO L225 Difference]: With dead ends: 10641 [2021-06-12 19:48:29,526 INFO L226 Difference]: Without dead ends: 8426 [2021-06-12 19:48:29,527 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:48:29,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8426 states. [2021-06-12 19:48:29,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8426 to 6226. [2021-06-12 19:48:29,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 6.617510040160642) internal successors, (41194), 6225 states have internal predecessors, (41194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:29,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 41194 transitions. [2021-06-12 19:48:29,926 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 41194 transitions. Word has length 28 [2021-06-12 19:48:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:29,926 INFO L482 AbstractCegarLoop]: Abstraction has 6226 states and 41194 transitions. [2021-06-12 19:48:29,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-12 19:48:29,927 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 41194 transitions. [2021-06-12 19:48:29,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 19:48:29,948 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:29,948 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:30,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:30,161 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:30,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:30,162 INFO L82 PathProgramCache]: Analyzing trace with hash 589935477, now seen corresponding path program 4 times [2021-06-12 19:48:30,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:30,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188263411] [2021-06-12 19:48:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:48:30,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:30,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188263411] [2021-06-12 19:48:30,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188263411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:30,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273342699] [2021-06-12 19:48:30,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:48:30,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:48:30,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:30,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:48:30,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:48:30,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273342699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:30,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:30,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:48:30,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031157820] [2021-06-12 19:48:30,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:48:30,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:30,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:48:30,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:48:30,440 INFO L87 Difference]: Start difference. First operand 6226 states and 41194 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:30,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:30,685 INFO L93 Difference]: Finished difference Result 11692 states and 73874 transitions. [2021-06-12 19:48:30,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:48:30,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 19:48:30,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:30,759 INFO L225 Difference]: With dead ends: 11692 [2021-06-12 19:48:30,760 INFO L226 Difference]: Without dead ends: 7762 [2021-06-12 19:48:30,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:48:30,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7762 states. [2021-06-12 19:48:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7762 to 6226. [2021-06-12 19:48:30,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 6.525622489959839) internal successors, (40622), 6225 states have internal predecessors, (40622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 40622 transitions. [2021-06-12 19:48:31,161 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 40622 transitions. Word has length 28 [2021-06-12 19:48:31,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:31,163 INFO L482 AbstractCegarLoop]: Abstraction has 6226 states and 40622 transitions. [2021-06-12 19:48:31,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:31,163 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 40622 transitions. [2021-06-12 19:48:31,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 19:48:31,190 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:31,190 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:31,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 19:48:31,391 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:31,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:31,391 INFO L82 PathProgramCache]: Analyzing trace with hash 913623149, now seen corresponding path program 5 times [2021-06-12 19:48:31,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:31,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521503511] [2021-06-12 19:48:31,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:48:31,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:31,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521503511] [2021-06-12 19:48:31,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521503511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:31,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70085383] [2021-06-12 19:48:31,428 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 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 [2021-06-12 19:48:31,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:48:31,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:31,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:48:31,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:48:31,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70085383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:31,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:31,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:48:31,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397832262] [2021-06-12 19:48:31,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:48:31,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:31,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:48:31,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:48:31,573 INFO L87 Difference]: Start difference. First operand 6226 states and 40622 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-06-12 19:48:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:31,770 INFO L93 Difference]: Finished difference Result 10638 states and 67096 transitions. [2021-06-12 19:48:31,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:48:31,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 28 [2021-06-12 19:48:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:31,795 INFO L225 Difference]: With dead ends: 10638 [2021-06-12 19:48:31,795 INFO L226 Difference]: Without dead ends: 7656 [2021-06-12 19:48:31,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:48:31,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7656 states. [2021-06-12 19:48:31,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7656 to 5654. [2021-06-12 19:48:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5654 states, 5653 states have (on average 6.388466301079073) internal successors, (36114), 5653 states have internal predecessors, (36114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 36114 transitions. [2021-06-12 19:48:32,109 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 36114 transitions. Word has length 28 [2021-06-12 19:48:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:32,110 INFO L482 AbstractCegarLoop]: Abstraction has 5654 states and 36114 transitions. [2021-06-12 19:48:32,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-06-12 19:48:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 36114 transitions. [2021-06-12 19:48:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 19:48:32,130 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:32,130 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:32,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-12 19:48:32,355 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:32,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:32,355 INFO L82 PathProgramCache]: Analyzing trace with hash -317378095, now seen corresponding path program 6 times [2021-06-12 19:48:32,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:32,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293381423] [2021-06-12 19:48:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:48:32,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:32,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293381423] [2021-06-12 19:48:32,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293381423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:32,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95984086] [2021-06-12 19:48:32,408 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 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 [2021-06-12 19:48:32,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:48:32,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:32,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:48:32,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:48:32,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95984086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:32,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:32,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:48:32,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559579636] [2021-06-12 19:48:32,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:48:32,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:32,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:48:32,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:48:32,588 INFO L87 Difference]: Start difference. First operand 5654 states and 36114 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-06-12 19:48:32,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:32,732 INFO L93 Difference]: Finished difference Result 8816 states and 55756 transitions. [2021-06-12 19:48:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:48:32,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 28 [2021-06-12 19:48:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:32,760 INFO L225 Difference]: With dead ends: 8816 [2021-06-12 19:48:32,760 INFO L226 Difference]: Without dead ends: 7190 [2021-06-12 19:48:32,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:48:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7190 states. [2021-06-12 19:48:32,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7190 to 5368. [2021-06-12 19:48:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 6.3355692193031485) internal successors, (34003), 5367 states have internal predecessors, (34003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 34003 transitions. [2021-06-12 19:48:32,994 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 34003 transitions. Word has length 28 [2021-06-12 19:48:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:32,994 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 34003 transitions. [2021-06-12 19:48:32,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-06-12 19:48:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 34003 transitions. [2021-06-12 19:48:33,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 19:48:33,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:33,007 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:33,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:33,209 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:33,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:33,209 INFO L82 PathProgramCache]: Analyzing trace with hash -451391601, now seen corresponding path program 7 times [2021-06-12 19:48:33,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:33,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719971222] [2021-06-12 19:48:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:48:33,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:33,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719971222] [2021-06-12 19:48:33,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719971222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:33,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899741588] [2021-06-12 19:48:33,244 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 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 [2021-06-12 19:48:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:33,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:48:33,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:48:33,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899741588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:33,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:33,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:48:33,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989186911] [2021-06-12 19:48:33,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:48:33,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:33,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:48:33,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:48:33,362 INFO L87 Difference]: Start difference. First operand 5368 states and 34003 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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) [2021-06-12 19:48:33,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:33,499 INFO L93 Difference]: Finished difference Result 7762 states and 48993 transitions. [2021-06-12 19:48:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:48:33,499 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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 28 [2021-06-12 19:48:33,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:33,607 INFO L225 Difference]: With dead ends: 7762 [2021-06-12 19:48:33,607 INFO L226 Difference]: Without dead ends: 6512 [2021-06-12 19:48:33,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:48:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6512 states. [2021-06-12 19:48:33,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6512 to 5940. [2021-06-12 19:48:33,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5940 states, 5939 states have (on average 6.339956221586125) internal successors, (37653), 5939 states have internal predecessors, (37653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:33,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5940 states to 5940 states and 37653 transitions. [2021-06-12 19:48:33,749 INFO L78 Accepts]: Start accepts. Automaton has 5940 states and 37653 transitions. Word has length 28 [2021-06-12 19:48:33,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:33,749 INFO L482 AbstractCegarLoop]: Abstraction has 5940 states and 37653 transitions. [2021-06-12 19:48:33,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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) [2021-06-12 19:48:33,750 INFO L276 IsEmpty]: Start isEmpty. Operand 5940 states and 37653 transitions. [2021-06-12 19:48:33,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:48:33,763 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:33,763 INFO L472 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] [2021-06-12 19:48:33,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:33,964 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:33,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:33,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1791557168, now seen corresponding path program 8 times [2021-06-12 19:48:33,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:33,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706459787] [2021-06-12 19:48:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:48:34,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:34,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706459787] [2021-06-12 19:48:34,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706459787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:34,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534720214] [2021-06-12 19:48:34,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:34,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:48:34,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:34,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:48:34,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:48:34,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534720214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:34,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:34,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-06-12 19:48:34,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769445107] [2021-06-12 19:48:34,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:48:34,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:34,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:48:34,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:48:34,235 INFO L87 Difference]: Start difference. First operand 5940 states and 37653 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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) [2021-06-12 19:48:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:34,474 INFO L93 Difference]: Finished difference Result 13716 states and 86495 transitions. [2021-06-12 19:48:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:48:34,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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 [2021-06-12 19:48:34,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:34,531 INFO L225 Difference]: With dead ends: 13716 [2021-06-12 19:48:34,531 INFO L226 Difference]: Without dead ends: 12948 [2021-06-12 19:48:34,532 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:48:34,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12948 states. [2021-06-12 19:48:34,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12948 to 9586. [2021-06-12 19:48:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9586 states, 9585 states have (on average 6.6200312989045385) internal successors, (63453), 9585 states have internal predecessors, (63453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9586 states to 9586 states and 63453 transitions. [2021-06-12 19:48:34,994 INFO L78 Accepts]: Start accepts. Automaton has 9586 states and 63453 transitions. Word has length 29 [2021-06-12 19:48:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:34,994 INFO L482 AbstractCegarLoop]: Abstraction has 9586 states and 63453 transitions. [2021-06-12 19:48:34,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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) [2021-06-12 19:48:34,995 INFO L276 IsEmpty]: Start isEmpty. Operand 9586 states and 63453 transitions. [2021-06-12 19:48:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:48:35,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:35,021 INFO L472 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] [2021-06-12 19:48:35,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 19:48:35,222 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:35,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:35,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1011086738, now seen corresponding path program 9 times [2021-06-12 19:48:35,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:35,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419780334] [2021-06-12 19:48:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:48:35,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:35,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419780334] [2021-06-12 19:48:35,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419780334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:35,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689382895] [2021-06-12 19:48:35,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:35,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:48:35,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:35,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:48:35,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:35,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689382895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:35,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:35,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-12 19:48:35,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392487800] [2021-06-12 19:48:35,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:48:35,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:35,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:48:35,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:48:35,402 INFO L87 Difference]: Start difference. First operand 9586 states and 63453 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-06-12 19:48:35,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:35,952 INFO L93 Difference]: Finished difference Result 25346 states and 162331 transitions. [2021-06-12 19:48:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:48:35,952 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 29 [2021-06-12 19:48:35,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:36,045 INFO L225 Difference]: With dead ends: 25346 [2021-06-12 19:48:36,045 INFO L226 Difference]: Without dead ends: 23242 [2021-06-12 19:48:36,046 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:48:36,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23242 states. [2021-06-12 19:48:36,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23242 to 14272. [2021-06-12 19:48:36,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14272 states, 14271 states have (on average 6.922219886483077) internal successors, (98787), 14271 states have internal predecessors, (98787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14272 states to 14272 states and 98787 transitions. [2021-06-12 19:48:36,685 INFO L78 Accepts]: Start accepts. Automaton has 14272 states and 98787 transitions. Word has length 29 [2021-06-12 19:48:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:36,685 INFO L482 AbstractCegarLoop]: Abstraction has 14272 states and 98787 transitions. [2021-06-12 19:48:36,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-06-12 19:48:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 14272 states and 98787 transitions. [2021-06-12 19:48:36,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 19:48:36,725 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:36,725 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:36,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 19:48:36,926 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:36,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:36,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1639971327, now seen corresponding path program 10 times [2021-06-12 19:48:36,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:36,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618525393] [2021-06-12 19:48:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:37,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:37,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618525393] [2021-06-12 19:48:37,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618525393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:37,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719429306] [2021-06-12 19:48:37,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:48:37,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:48:37,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:37,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:48:37,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:37,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719429306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:37,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:37,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:48:37,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572460416] [2021-06-12 19:48:37,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:48:37,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:37,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:48:37,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:48:37,294 INFO L87 Difference]: Start difference. First operand 14272 states and 98787 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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) [2021-06-12 19:48:37,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:37,502 INFO L93 Difference]: Finished difference Result 19626 states and 131324 transitions. [2021-06-12 19:48:37,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:48:37,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 19:48:37,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:37,564 INFO L225 Difference]: With dead ends: 19626 [2021-06-12 19:48:37,564 INFO L226 Difference]: Without dead ends: 16783 [2021-06-12 19:48:37,564 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:48:37,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16783 states. [2021-06-12 19:48:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16783 to 13215. [2021-06-12 19:48:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13215 states, 13214 states have (on average 6.851672468593915) internal successors, (90538), 13214 states have internal predecessors, (90538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:38,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13215 states to 13215 states and 90538 transitions. [2021-06-12 19:48:38,157 INFO L78 Accepts]: Start accepts. Automaton has 13215 states and 90538 transitions. Word has length 30 [2021-06-12 19:48:38,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:38,157 INFO L482 AbstractCegarLoop]: Abstraction has 13215 states and 90538 transitions. [2021-06-12 19:48:38,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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) [2021-06-12 19:48:38,157 INFO L276 IsEmpty]: Start isEmpty. Operand 13215 states and 90538 transitions. [2021-06-12 19:48:38,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 19:48:38,328 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:38,328 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:38,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 19:48:38,551 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:38,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:38,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1256865581, now seen corresponding path program 11 times [2021-06-12 19:48:38,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:38,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968514545] [2021-06-12 19:48:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:38,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:38,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968514545] [2021-06-12 19:48:38,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968514545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:38,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481911848] [2021-06-12 19:48:38,588 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 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 [2021-06-12 19:48:38,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:48:38,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:38,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:48:38,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:38,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481911848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:38,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:38,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:48:38,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712360713] [2021-06-12 19:48:38,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:48:38,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:38,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:48:38,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:48:38,754 INFO L87 Difference]: Start difference. First operand 13215 states and 90538 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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) [2021-06-12 19:48:39,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:39,012 INFO L93 Difference]: Finished difference Result 20352 states and 135504 transitions. [2021-06-12 19:48:39,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:48:39,013 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 19:48:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:39,076 INFO L225 Difference]: With dead ends: 20352 [2021-06-12 19:48:39,077 INFO L226 Difference]: Without dead ends: 15593 [2021-06-12 19:48:39,077 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:48:39,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15593 states. [2021-06-12 19:48:39,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15593 to 13215. [2021-06-12 19:48:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13215 states, 13214 states have (on average 6.761767822006962) internal successors, (89350), 13214 states have internal predecessors, (89350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13215 states to 13215 states and 89350 transitions. [2021-06-12 19:48:39,552 INFO L78 Accepts]: Start accepts. Automaton has 13215 states and 89350 transitions. Word has length 30 [2021-06-12 19:48:39,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:39,552 INFO L482 AbstractCegarLoop]: Abstraction has 13215 states and 89350 transitions. [2021-06-12 19:48:39,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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) [2021-06-12 19:48:39,553 INFO L276 IsEmpty]: Start isEmpty. Operand 13215 states and 89350 transitions. [2021-06-12 19:48:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 19:48:39,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:39,584 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:39,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:39,784 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:39,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1618072385, now seen corresponding path program 12 times [2021-06-12 19:48:39,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:39,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120313911] [2021-06-12 19:48:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:39,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:39,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120313911] [2021-06-12 19:48:39,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120313911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:39,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640866749] [2021-06-12 19:48:39,819 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 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 [2021-06-12 19:48:39,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:48:39,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:39,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:48:39,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:40,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640866749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:40,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:40,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:48:40,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134591136] [2021-06-12 19:48:40,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:48:40,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:40,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:48:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:48:40,120 INFO L87 Difference]: Start difference. First operand 13215 states and 89350 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-06-12 19:48:40,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:40,337 INFO L93 Difference]: Finished difference Result 19162 states and 126426 transitions. [2021-06-12 19:48:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:48:40,337 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 30 [2021-06-12 19:48:40,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:40,393 INFO L225 Difference]: With dead ends: 19162 [2021-06-12 19:48:40,393 INFO L226 Difference]: Without dead ends: 16185 [2021-06-12 19:48:40,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:48:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16185 states. [2021-06-12 19:48:40,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16185 to 12027. [2021-06-12 19:48:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12027 states, 12026 states have (on average 6.625644437053052) internal successors, (79680), 12026 states have internal predecessors, (79680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12027 states to 12027 states and 79680 transitions. [2021-06-12 19:48:40,938 INFO L78 Accepts]: Start accepts. Automaton has 12027 states and 79680 transitions. Word has length 30 [2021-06-12 19:48:40,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:40,938 INFO L482 AbstractCegarLoop]: Abstraction has 12027 states and 79680 transitions. [2021-06-12 19:48:40,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-06-12 19:48:40,938 INFO L276 IsEmpty]: Start isEmpty. Operand 12027 states and 79680 transitions. [2021-06-12 19:48:40,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 19:48:40,974 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:40,974 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:41,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 19:48:41,177 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:41,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:41,177 INFO L82 PathProgramCache]: Analyzing trace with hash 937421221, now seen corresponding path program 13 times [2021-06-12 19:48:41,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:41,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874990320] [2021-06-12 19:48:41,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:41,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:41,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874990320] [2021-06-12 19:48:41,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874990320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:41,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095778371] [2021-06-12 19:48:41,208 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 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 [2021-06-12 19:48:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:41,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:48:41,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:41,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095778371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:41,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:41,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:48:41,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041803713] [2021-06-12 19:48:41,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:48:41,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:41,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:48:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:48:41,330 INFO L87 Difference]: Start difference. First operand 12027 states and 79680 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-06-12 19:48:41,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:41,742 INFO L93 Difference]: Finished difference Result 16783 states and 110645 transitions. [2021-06-12 19:48:41,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:48:41,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 30 [2021-06-12 19:48:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:41,810 INFO L225 Difference]: With dead ends: 16783 [2021-06-12 19:48:41,810 INFO L226 Difference]: Without dead ends: 14405 [2021-06-12 19:48:41,811 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:48:41,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14405 states. [2021-06-12 19:48:42,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14405 to 11433. [2021-06-12 19:48:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11433 states, 11432 states have (on average 6.57295311406578) internal successors, (75142), 11432 states have internal predecessors, (75142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11433 states to 11433 states and 75142 transitions. [2021-06-12 19:48:42,128 INFO L78 Accepts]: Start accepts. Automaton has 11433 states and 75142 transitions. Word has length 30 [2021-06-12 19:48:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:42,128 INFO L482 AbstractCegarLoop]: Abstraction has 11433 states and 75142 transitions. [2021-06-12 19:48:42,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-06-12 19:48:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 11433 states and 75142 transitions. [2021-06-12 19:48:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 19:48:42,336 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:42,336 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:42,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:42,549 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:42,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:42,551 INFO L82 PathProgramCache]: Analyzing trace with hash -73696029, now seen corresponding path program 14 times [2021-06-12 19:48:42,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:42,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272959255] [2021-06-12 19:48:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:42,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:42,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272959255] [2021-06-12 19:48:42,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272959255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:42,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27667333] [2021-06-12 19:48:42,611 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 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 [2021-06-12 19:48:42,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:48:42,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:42,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:48:42,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:42,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27667333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:42,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:42,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:48:42,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043095274] [2021-06-12 19:48:42,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:48:42,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:42,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:48:42,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:48:42,736 INFO L87 Difference]: Start difference. First operand 11433 states and 75142 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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) [2021-06-12 19:48:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:42,930 INFO L93 Difference]: Finished difference Result 15000 states and 98811 transitions. [2021-06-12 19:48:42,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:48:42,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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 30 [2021-06-12 19:48:42,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:42,988 INFO L225 Difference]: With dead ends: 15000 [2021-06-12 19:48:42,988 INFO L226 Difference]: Without dead ends: 13809 [2021-06-12 19:48:42,988 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:48:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13809 states. [2021-06-12 19:48:43,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13809 to 12621. [2021-06-12 19:48:43,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12621 states, 12620 states have (on average 6.579239302694137) internal successors, (83030), 12620 states have internal predecessors, (83030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12621 states to 12621 states and 83030 transitions. [2021-06-12 19:48:43,381 INFO L78 Accepts]: Start accepts. Automaton has 12621 states and 83030 transitions. Word has length 30 [2021-06-12 19:48:43,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:43,381 INFO L482 AbstractCegarLoop]: Abstraction has 12621 states and 83030 transitions. [2021-06-12 19:48:43,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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) [2021-06-12 19:48:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 12621 states and 83030 transitions. [2021-06-12 19:48:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 19:48:43,412 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:43,412 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:43,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:43,615 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:43,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1100522568, now seen corresponding path program 15 times [2021-06-12 19:48:43,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:43,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048683125] [2021-06-12 19:48:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 19:48:43,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:43,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048683125] [2021-06-12 19:48:43,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048683125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:43,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114976663] [2021-06-12 19:48:43,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:43,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:48:43,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:43,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:48:43,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:43,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114976663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:43,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:43,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 9 [2021-06-12 19:48:43,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070078938] [2021-06-12 19:48:43,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:48:43,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:43,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:48:43,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:48:43,806 INFO L87 Difference]: Start difference. First operand 12621 states and 83030 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 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) [2021-06-12 19:48:44,319 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-06-12 19:48:44,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:44,719 INFO L93 Difference]: Finished difference Result 40048 states and 255837 transitions. [2021-06-12 19:48:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:48:44,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 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 [2021-06-12 19:48:44,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:44,890 INFO L225 Difference]: With dead ends: 40048 [2021-06-12 19:48:44,890 INFO L226 Difference]: Without dead ends: 37299 [2021-06-12 19:48:44,891 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 318.8ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:48:45,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37299 states. [2021-06-12 19:48:45,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37299 to 23827. [2021-06-12 19:48:45,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23827 states, 23826 states have (on average 6.888734995383195) internal successors, (164131), 23826 states have internal predecessors, (164131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:45,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23827 states to 23827 states and 164131 transitions. [2021-06-12 19:48:45,895 INFO L78 Accepts]: Start accepts. Automaton has 23827 states and 164131 transitions. Word has length 31 [2021-06-12 19:48:45,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:45,895 INFO L482 AbstractCegarLoop]: Abstraction has 23827 states and 164131 transitions. [2021-06-12 19:48:45,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 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) [2021-06-12 19:48:45,895 INFO L276 IsEmpty]: Start isEmpty. Operand 23827 states and 164131 transitions. [2021-06-12 19:48:45,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:48:45,950 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:45,950 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:46,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 19:48:46,153 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:46,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:46,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1166394235, now seen corresponding path program 16 times [2021-06-12 19:48:46,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:46,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052032846] [2021-06-12 19:48:46,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:46,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:46,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052032846] [2021-06-12 19:48:46,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052032846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:46,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468803453] [2021-06-12 19:48:46,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:46,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:48:46,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:46,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:48:46,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:46,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468803453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:46,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:46,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-12 19:48:46,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227594869] [2021-06-12 19:48:46,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:48:46,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:46,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:48:46,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:48:46,351 INFO L87 Difference]: Start difference. First operand 23827 states and 164131 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) [2021-06-12 19:48:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:46,989 INFO L93 Difference]: Finished difference Result 37282 states and 244997 transitions. [2021-06-12 19:48:46,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:48:46,989 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 32 [2021-06-12 19:48:46,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:47,114 INFO L225 Difference]: With dead ends: 37282 [2021-06-12 19:48:47,114 INFO L226 Difference]: Without dead ends: 32432 [2021-06-12 19:48:47,115 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:48:47,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32432 states. [2021-06-12 19:48:48,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32432 to 23826. [2021-06-12 19:48:48,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23826 states, 23825 states have (on average 6.828247639034627) internal successors, (162683), 23825 states have internal predecessors, (162683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23826 states to 23826 states and 162683 transitions. [2021-06-12 19:48:48,298 INFO L78 Accepts]: Start accepts. Automaton has 23826 states and 162683 transitions. Word has length 32 [2021-06-12 19:48:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:48,298 INFO L482 AbstractCegarLoop]: Abstraction has 23826 states and 162683 transitions. [2021-06-12 19:48:48,298 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) [2021-06-12 19:48:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 23826 states and 162683 transitions. [2021-06-12 19:48:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:48:48,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:48,361 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:48,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:48,563 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:48,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:48,563 INFO L82 PathProgramCache]: Analyzing trace with hash 418167869, now seen corresponding path program 17 times [2021-06-12 19:48:48,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:48,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127965340] [2021-06-12 19:48:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:48,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:48,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127965340] [2021-06-12 19:48:48,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127965340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:48,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569574518] [2021-06-12 19:48:48,629 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 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 [2021-06-12 19:48:48,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:48:48,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:48,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:48:48,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:48,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569574518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:48,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:48,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:48:48,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944597616] [2021-06-12 19:48:48,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:48:48,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:48,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:48:48,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:48:48,777 INFO L87 Difference]: Start difference. First operand 23826 states and 162683 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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) [2021-06-12 19:48:49,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:49,492 INFO L93 Difference]: Finished difference Result 41333 states and 268452 transitions. [2021-06-12 19:48:49,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:48:49,493 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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 32 [2021-06-12 19:48:49,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:49,613 INFO L225 Difference]: With dead ends: 41333 [2021-06-12 19:48:49,613 INFO L226 Difference]: Without dead ends: 28816 [2021-06-12 19:48:49,614 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:48:49,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28816 states. [2021-06-12 19:48:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28816 to 21142. [2021-06-12 19:48:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21142 states, 21141 states have (on average 6.765668606026205) internal successors, (143033), 21141 states have internal predecessors, (143033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21142 states to 21142 states and 143033 transitions. [2021-06-12 19:48:50,349 INFO L78 Accepts]: Start accepts. Automaton has 21142 states and 143033 transitions. Word has length 32 [2021-06-12 19:48:50,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:50,349 INFO L482 AbstractCegarLoop]: Abstraction has 21142 states and 143033 transitions. [2021-06-12 19:48:50,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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) [2021-06-12 19:48:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 21142 states and 143033 transitions. [2021-06-12 19:48:50,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:48:50,692 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:50,692 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:50,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 19:48:50,907 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:50,908 INFO L82 PathProgramCache]: Analyzing trace with hash 791966179, now seen corresponding path program 18 times [2021-06-12 19:48:50,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:50,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814502563] [2021-06-12 19:48:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 19:48:50,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:50,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814502563] [2021-06-12 19:48:50,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814502563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:50,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594348640] [2021-06-12 19:48:50,951 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 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 [2021-06-12 19:48:50,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:48:51,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:51,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:48:51,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:51,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594348640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:51,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:51,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 19:48:51,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693570229] [2021-06-12 19:48:51,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:48:51,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:51,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:48:51,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:48:51,128 INFO L87 Difference]: Start difference. First operand 21142 states and 143033 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:51,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:51,904 INFO L93 Difference]: Finished difference Result 44813 states and 287398 transitions. [2021-06-12 19:48:51,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:48:51,917 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 19:48:51,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:52,100 INFO L225 Difference]: With dead ends: 44813 [2021-06-12 19:48:52,101 INFO L226 Difference]: Without dead ends: 33157 [2021-06-12 19:48:52,101 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:48:52,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33157 states. [2021-06-12 19:48:52,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33157 to 20660. [2021-06-12 19:48:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20660 states, 20659 states have (on average 6.63855946560821) internal successors, (137146), 20659 states have internal predecessors, (137146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20660 states to 20660 states and 137146 transitions. [2021-06-12 19:48:52,866 INFO L78 Accepts]: Start accepts. Automaton has 20660 states and 137146 transitions. Word has length 32 [2021-06-12 19:48:52,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:52,866 INFO L482 AbstractCegarLoop]: Abstraction has 20660 states and 137146 transitions. [2021-06-12 19:48:52,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:52,867 INFO L276 IsEmpty]: Start isEmpty. Operand 20660 states and 137146 transitions. [2021-06-12 19:48:52,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:48:52,915 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:52,915 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:53,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 19:48:53,117 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:53,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:53,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1084222905, now seen corresponding path program 19 times [2021-06-12 19:48:53,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:53,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087336217] [2021-06-12 19:48:53,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:53,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:53,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087336217] [2021-06-12 19:48:53,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087336217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:53,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766500788] [2021-06-12 19:48:53,152 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 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 [2021-06-12 19:48:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:53,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:48:53,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:53,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766500788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:53,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:53,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 19:48:53,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743053580] [2021-06-12 19:48:53,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:48:53,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:53,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:48:53,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:48:53,318 INFO L87 Difference]: Start difference. First operand 20660 states and 137146 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:54,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:54,099 INFO L93 Difference]: Finished difference Result 40132 states and 256712 transitions. [2021-06-12 19:48:54,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:48:54,099 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 19:48:54,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:54,210 INFO L225 Difference]: With dead ends: 40132 [2021-06-12 19:48:54,210 INFO L226 Difference]: Without dead ends: 29402 [2021-06-12 19:48:54,210 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:48:54,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29402 states. [2021-06-12 19:48:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29402 to 19318. [2021-06-12 19:48:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19318 states, 19317 states have (on average 6.575969353419268) internal successors, (127028), 19317 states have internal predecessors, (127028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:54,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19318 states to 19318 states and 127028 transitions. [2021-06-12 19:48:54,979 INFO L78 Accepts]: Start accepts. Automaton has 19318 states and 127028 transitions. Word has length 32 [2021-06-12 19:48:54,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:54,979 INFO L482 AbstractCegarLoop]: Abstraction has 19318 states and 127028 transitions. [2021-06-12 19:48:54,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:54,980 INFO L276 IsEmpty]: Start isEmpty. Operand 19318 states and 127028 transitions. [2021-06-12 19:48:55,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:48:55,031 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:55,031 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:55,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:55,232 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:55,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:55,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1022183291, now seen corresponding path program 20 times [2021-06-12 19:48:55,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:55,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207495266] [2021-06-12 19:48:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:55,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:55,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207495266] [2021-06-12 19:48:55,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207495266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:55,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952944302] [2021-06-12 19:48:55,274 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 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 [2021-06-12 19:48:55,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:48:55,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:55,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:48:55,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:55,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952944302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:55,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:55,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:48:55,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14384313] [2021-06-12 19:48:55,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:48:55,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:55,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:48:55,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:48:55,460 INFO L87 Difference]: Start difference. First operand 19318 states and 127028 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:56,160 INFO L93 Difference]: Finished difference Result 30263 states and 196279 transitions. [2021-06-12 19:48:56,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:48:56,160 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 19:48:56,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:56,265 INFO L225 Difference]: With dead ends: 30263 [2021-06-12 19:48:56,266 INFO L226 Difference]: Without dead ends: 27994 [2021-06-12 19:48:56,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:48:56,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27994 states. [2021-06-12 19:48:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27994 to 19318. [2021-06-12 19:48:56,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19318 states, 19317 states have (on average 6.575969353419268) internal successors, (127028), 19317 states have internal predecessors, (127028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19318 states to 19318 states and 127028 transitions. [2021-06-12 19:48:56,981 INFO L78 Accepts]: Start accepts. Automaton has 19318 states and 127028 transitions. Word has length 32 [2021-06-12 19:48:56,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:56,982 INFO L482 AbstractCegarLoop]: Abstraction has 19318 states and 127028 transitions. [2021-06-12 19:48:56,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:56,982 INFO L276 IsEmpty]: Start isEmpty. Operand 19318 states and 127028 transitions. [2021-06-12 19:48:57,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:48:57,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:57,027 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:57,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 19:48:57,228 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:48:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:57,228 INFO L82 PathProgramCache]: Analyzing trace with hash 13605117, now seen corresponding path program 21 times [2021-06-12 19:48:57,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:57,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717845431] [2021-06-12 19:48:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:48:57,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:57,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717845431] [2021-06-12 19:48:57,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717845431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:57,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610784238] [2021-06-12 19:48:57,263 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 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 [2021-06-12 19:48:57,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:48:57,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:57,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:48:57,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-12 19:48:57,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610784238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:57,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:57,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-12 19:48:57,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069733120] [2021-06-12 19:48:57,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:48:57,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:57,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:48:57,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:48:57,663 INFO L87 Difference]: Start difference. First operand 19318 states and 127028 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:59,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:59,035 INFO L93 Difference]: Finished difference Result 45485 states and 293122 transitions. [2021-06-12 19:48:59,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:48:59,036 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 19:48:59,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:59,212 INFO L225 Difference]: With dead ends: 45485 [2021-06-12 19:48:59,212 INFO L226 Difference]: Without dead ends: 40798 [2021-06-12 19:48:59,212 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 427.9ms TimeCoverageRelationStatistics Valid=240, Invalid=1740, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 19:48:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40798 states. [2021-06-12 19:48:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40798 to 22218. [2021-06-12 19:48:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22218 states, 22217 states have (on average 6.736643111131116) internal successors, (149668), 22217 states have internal predecessors, (149668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22218 states to 22218 states and 149668 transitions. [2021-06-12 19:49:00,026 INFO L78 Accepts]: Start accepts. Automaton has 22218 states and 149668 transitions. Word has length 32 [2021-06-12 19:49:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:00,027 INFO L482 AbstractCegarLoop]: Abstraction has 22218 states and 149668 transitions. [2021-06-12 19:49:00,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 22218 states and 149668 transitions. [2021-06-12 19:49:00,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:49:00,342 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:00,342 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:00,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:00,557 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:00,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1536238151, now seen corresponding path program 22 times [2021-06-12 19:49:00,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:00,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568862241] [2021-06-12 19:49:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:49:00,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:00,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568862241] [2021-06-12 19:49:00,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568862241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:00,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974861364] [2021-06-12 19:49:00,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:00,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:49:00,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:00,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:49:00,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:49:00,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974861364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:00,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:00,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-12 19:49:00,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856184500] [2021-06-12 19:49:00,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:49:00,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:00,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:49:00,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:49:00,730 INFO L87 Difference]: Start difference. First operand 22218 states and 149668 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:01,148 INFO L93 Difference]: Finished difference Result 41987 states and 272492 transitions. [2021-06-12 19:49:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:49:01,149 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 19:49:01,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:01,536 INFO L225 Difference]: With dead ends: 41987 [2021-06-12 19:49:01,536 INFO L226 Difference]: Without dead ends: 33040 [2021-06-12 19:49:01,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:49:01,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33040 states. [2021-06-12 19:49:02,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33040 to 22218. [2021-06-12 19:49:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22218 states, 22217 states have (on average 6.7117972723590045) internal successors, (149116), 22217 states have internal predecessors, (149116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22218 states to 22218 states and 149116 transitions. [2021-06-12 19:49:02,350 INFO L78 Accepts]: Start accepts. Automaton has 22218 states and 149116 transitions. Word has length 32 [2021-06-12 19:49:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:02,350 INFO L482 AbstractCegarLoop]: Abstraction has 22218 states and 149116 transitions. [2021-06-12 19:49:02,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 22218 states and 149116 transitions. [2021-06-12 19:49:02,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:49:02,400 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:02,400 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:02,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 19:49:02,601 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:02,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:02,602 INFO L82 PathProgramCache]: Analyzing trace with hash -339950933, now seen corresponding path program 23 times [2021-06-12 19:49:02,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:02,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650168296] [2021-06-12 19:49:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:49:02,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:02,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650168296] [2021-06-12 19:49:02,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650168296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:02,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883785657] [2021-06-12 19:49:02,634 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 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 [2021-06-12 19:49:02,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:49:02,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:02,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:49:02,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:49:02,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883785657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:02,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:02,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-12 19:49:02,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229786290] [2021-06-12 19:49:02,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:49:02,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:02,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:49:02,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:49:02,798 INFO L87 Difference]: Start difference. First operand 22218 states and 149116 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:03,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:03,509 INFO L93 Difference]: Finished difference Result 37137 states and 242038 transitions. [2021-06-12 19:49:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:49:03,510 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 19:49:03,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:03,653 INFO L225 Difference]: With dead ends: 37137 [2021-06-12 19:49:03,653 INFO L226 Difference]: Without dead ends: 33280 [2021-06-12 19:49:03,653 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:49:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33280 states. [2021-06-12 19:49:04,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33280 to 21666. [2021-06-12 19:49:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21666 states, 21665 states have (on average 6.638495268866836) internal successors, (143823), 21665 states have internal predecessors, (143823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:04,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21666 states to 21666 states and 143823 transitions. [2021-06-12 19:49:04,400 INFO L78 Accepts]: Start accepts. Automaton has 21666 states and 143823 transitions. Word has length 32 [2021-06-12 19:49:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:04,401 INFO L482 AbstractCegarLoop]: Abstraction has 21666 states and 143823 transitions. [2021-06-12 19:49:04,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 21666 states and 143823 transitions. [2021-06-12 19:49:04,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:49:04,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:04,450 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:04,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 19:49:04,653 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:04,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:04,653 INFO L82 PathProgramCache]: Analyzing trace with hash -277911319, now seen corresponding path program 24 times [2021-06-12 19:49:04,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:04,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617957940] [2021-06-12 19:49:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 19:49:04,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:04,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617957940] [2021-06-12 19:49:04,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617957940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:04,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232971457] [2021-06-12 19:49:04,685 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 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 [2021-06-12 19:49:04,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:49:04,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:04,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:49:04,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:49:04,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232971457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:04,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:04,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 19:49:04,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730736656] [2021-06-12 19:49:04,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:49:04,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:04,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:49:04,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:49:04,833 INFO L87 Difference]: Start difference. First operand 21666 states and 143823 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:05,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:05,983 INFO L93 Difference]: Finished difference Result 55554 states and 358578 transitions. [2021-06-12 19:49:05,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:49:05,985 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 19:49:05,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:06,299 INFO L225 Difference]: With dead ends: 55554 [2021-06-12 19:49:06,299 INFO L226 Difference]: Without dead ends: 31050 [2021-06-12 19:49:06,300 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:49:06,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31050 states. [2021-06-12 19:49:07,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31050 to 18354. [2021-06-12 19:49:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18354 states, 18353 states have (on average 6.557238598594235) internal successors, (120345), 18353 states have internal predecessors, (120345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18354 states to 18354 states and 120345 transitions. [2021-06-12 19:49:07,178 INFO L78 Accepts]: Start accepts. Automaton has 18354 states and 120345 transitions. Word has length 32 [2021-06-12 19:49:07,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:07,178 INFO L482 AbstractCegarLoop]: Abstraction has 18354 states and 120345 transitions. [2021-06-12 19:49:07,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:07,179 INFO L276 IsEmpty]: Start isEmpty. Operand 18354 states and 120345 transitions. [2021-06-12 19:49:07,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:49:07,220 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:07,220 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:07,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:07,421 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:07,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:07,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1583277101, now seen corresponding path program 25 times [2021-06-12 19:49:07,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:07,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727774407] [2021-06-12 19:49:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:49:07,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:07,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727774407] [2021-06-12 19:49:07,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727774407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:07,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750671876] [2021-06-12 19:49:07,461 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 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 [2021-06-12 19:49:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:07,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:49:07,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:49:07,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750671876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:07,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:07,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:49:07,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109630417] [2021-06-12 19:49:07,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:49:07,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:07,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:49:07,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:49:07,585 INFO L87 Difference]: Start difference. First operand 18354 states and 120345 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) [2021-06-12 19:49:08,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:08,245 INFO L93 Difference]: Finished difference Result 24315 states and 158900 transitions. [2021-06-12 19:49:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:49:08,245 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 32 [2021-06-12 19:49:08,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:08,338 INFO L225 Difference]: With dead ends: 24315 [2021-06-12 19:49:08,338 INFO L226 Difference]: Without dead ends: 21666 [2021-06-12 19:49:08,339 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:49:08,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21666 states. [2021-06-12 19:49:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21666 to 19458. [2021-06-12 19:49:08,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19458 states, 19457 states have (on average 6.559027599321581) internal successors, (127619), 19457 states have internal predecessors, (127619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19458 states to 19458 states and 127619 transitions. [2021-06-12 19:49:09,048 INFO L78 Accepts]: Start accepts. Automaton has 19458 states and 127619 transitions. Word has length 32 [2021-06-12 19:49:09,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:09,048 INFO L482 AbstractCegarLoop]: Abstraction has 19458 states and 127619 transitions. [2021-06-12 19:49:09,048 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) [2021-06-12 19:49:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 19458 states and 127619 transitions. [2021-06-12 19:49:09,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 19:49:09,096 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:09,096 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:09,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:09,301 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:09,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:09,301 INFO L82 PathProgramCache]: Analyzing trace with hash 548184980, now seen corresponding path program 26 times [2021-06-12 19:49:09,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:09,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519131518] [2021-06-12 19:49:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:49:09,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:09,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519131518] [2021-06-12 19:49:09,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519131518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:09,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981444282] [2021-06-12 19:49:09,345 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 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 [2021-06-12 19:49:09,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:49:09,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:09,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:49:09,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 19:49:09,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981444282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:09,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:09,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-06-12 19:49:09,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047099440] [2021-06-12 19:49:09,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:49:09,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:09,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:49:09,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:49:09,528 INFO L87 Difference]: Start difference. First operand 19458 states and 127619 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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) [2021-06-12 19:49:10,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:10,129 INFO L93 Difference]: Finished difference Result 43790 states and 285373 transitions. [2021-06-12 19:49:10,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:49:10,129 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 33 [2021-06-12 19:49:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:10,327 INFO L225 Difference]: With dead ends: 43790 [2021-06-12 19:49:10,328 INFO L226 Difference]: Without dead ends: 42141 [2021-06-12 19:49:10,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:49:10,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42141 states. [2021-06-12 19:49:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42141 to 31980. [2021-06-12 19:49:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31980 states, 31979 states have (on average 6.798211326182807) internal successors, (217400), 31979 states have internal predecessors, (217400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:11,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31980 states to 31980 states and 217400 transitions. [2021-06-12 19:49:11,633 INFO L78 Accepts]: Start accepts. Automaton has 31980 states and 217400 transitions. Word has length 33 [2021-06-12 19:49:11,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:11,633 INFO L482 AbstractCegarLoop]: Abstraction has 31980 states and 217400 transitions. [2021-06-12 19:49:11,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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) [2021-06-12 19:49:11,633 INFO L276 IsEmpty]: Start isEmpty. Operand 31980 states and 217400 transitions. [2021-06-12 19:49:11,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 19:49:11,742 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:11,742 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:11,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-12 19:49:11,965 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:11,965 INFO L82 PathProgramCache]: Analyzing trace with hash 692395924, now seen corresponding path program 27 times [2021-06-12 19:49:11,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:11,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495138658] [2021-06-12 19:49:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-12 19:49:12,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:12,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495138658] [2021-06-12 19:49:12,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495138658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:12,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388095900] [2021-06-12 19:49:12,006 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 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 [2021-06-12 19:49:12,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:49:12,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:12,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:49:12,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-12 19:49:12,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388095900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:12,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:12,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-06-12 19:49:12,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106563061] [2021-06-12 19:49:12,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:49:12,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:12,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:49:12,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:49:12,168 INFO L87 Difference]: Start difference. First operand 31980 states and 217400 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 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) [2021-06-12 19:49:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:13,494 INFO L93 Difference]: Finished difference Result 78327 states and 512684 transitions. [2021-06-12 19:49:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:49:13,495 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 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 [2021-06-12 19:49:13,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:14,126 INFO L225 Difference]: With dead ends: 78327 [2021-06-12 19:49:14,126 INFO L226 Difference]: Without dead ends: 73049 [2021-06-12 19:49:14,127 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:49:14,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73049 states. [2021-06-12 19:49:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73049 to 37920. [2021-06-12 19:49:15,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37920 states, 37919 states have (on average 6.966454811572035) internal successors, (264161), 37919 states have internal predecessors, (264161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37920 states to 37920 states and 264161 transitions. [2021-06-12 19:49:15,847 INFO L78 Accepts]: Start accepts. Automaton has 37920 states and 264161 transitions. Word has length 33 [2021-06-12 19:49:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:15,847 INFO L482 AbstractCegarLoop]: Abstraction has 37920 states and 264161 transitions. [2021-06-12 19:49:15,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 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) [2021-06-12 19:49:15,848 INFO L276 IsEmpty]: Start isEmpty. Operand 37920 states and 264161 transitions. [2021-06-12 19:49:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 19:49:15,944 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:15,945 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:16,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:16,145 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:16,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:16,145 INFO L82 PathProgramCache]: Analyzing trace with hash -694764650, now seen corresponding path program 28 times [2021-06-12 19:49:16,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:16,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508582621] [2021-06-12 19:49:16,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-12 19:49:16,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:16,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508582621] [2021-06-12 19:49:16,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508582621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:16,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099458391] [2021-06-12 19:49:16,191 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 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 [2021-06-12 19:49:16,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:49:16,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:16,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:49:16,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 19:49:16,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099458391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:16,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:16,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-12 19:49:16,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427954458] [2021-06-12 19:49:16,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:49:16,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:16,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:49:16,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:49:16,302 INFO L87 Difference]: Start difference. First operand 37920 states and 264161 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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) [2021-06-12 19:49:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:17,908 INFO L93 Difference]: Finished difference Result 100012 states and 667139 transitions. [2021-06-12 19:49:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:49:17,909 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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 33 [2021-06-12 19:49:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:18,672 INFO L225 Difference]: With dead ends: 100012 [2021-06-12 19:49:18,673 INFO L226 Difference]: Without dead ends: 92787 [2021-06-12 19:49:18,673 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:49:18,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92787 states. [2021-06-12 19:49:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92787 to 58925. [2021-06-12 19:49:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58925 states, 58924 states have (on average 7.206706944538728) internal successors, (424648), 58924 states have internal predecessors, (424648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58925 states to 58925 states and 424648 transitions. [2021-06-12 19:49:21,329 INFO L78 Accepts]: Start accepts. Automaton has 58925 states and 424648 transitions. Word has length 33 [2021-06-12 19:49:21,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:21,330 INFO L482 AbstractCegarLoop]: Abstraction has 58925 states and 424648 transitions. [2021-06-12 19:49:21,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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) [2021-06-12 19:49:21,330 INFO L276 IsEmpty]: Start isEmpty. Operand 58925 states and 424648 transitions. [2021-06-12 19:49:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 19:49:21,515 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:21,515 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:21,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 19:49:21,715 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:21,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:21,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1092657503, now seen corresponding path program 29 times [2021-06-12 19:49:21,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:21,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9447] [2021-06-12 19:49:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 19:49:21,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:21,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9447] [2021-06-12 19:49:21,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:21,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705726944] [2021-06-12 19:49:21,743 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 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 [2021-06-12 19:49:21,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:49:21,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:21,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:49:21,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 19:49:21,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705726944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:21,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:21,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:49:21,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690841390] [2021-06-12 19:49:21,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:49:21,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:21,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:49:21,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:49:21,844 INFO L87 Difference]: Start difference. First operand 58925 states and 424648 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-12 19:49:23,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:23,148 INFO L93 Difference]: Finished difference Result 86764 states and 598397 transitions. [2021-06-12 19:49:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:49:23,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 34 [2021-06-12 19:49:23,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:23,546 INFO L225 Difference]: With dead ends: 86764 [2021-06-12 19:49:23,546 INFO L226 Difference]: Without dead ends: 74248 [2021-06-12 19:49:23,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:49:23,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74248 states. [2021-06-12 19:49:25,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74248 to 55757. [2021-06-12 19:49:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55757 states, 55756 states have (on average 7.122354544802353) internal successors, (397114), 55756 states have internal predecessors, (397114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:26,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55757 states to 55757 states and 397114 transitions. [2021-06-12 19:49:26,125 INFO L78 Accepts]: Start accepts. Automaton has 55757 states and 397114 transitions. Word has length 34 [2021-06-12 19:49:26,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:26,125 INFO L482 AbstractCegarLoop]: Abstraction has 55757 states and 397114 transitions. [2021-06-12 19:49:26,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-12 19:49:26,125 INFO L276 IsEmpty]: Start isEmpty. Operand 55757 states and 397114 transitions. [2021-06-12 19:49:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 19:49:26,295 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:26,295 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:26,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 19:49:26,495 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:26,496 INFO L82 PathProgramCache]: Analyzing trace with hash 759094517, now seen corresponding path program 30 times [2021-06-12 19:49:26,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:26,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895469648] [2021-06-12 19:49:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 19:49:26,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:26,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895469648] [2021-06-12 19:49:26,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895469648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:26,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117493910] [2021-06-12 19:49:26,523 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 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 [2021-06-12 19:49:26,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:49:26,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:26,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:49:26,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 19:49:26,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117493910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:26,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:26,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:49:26,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944348691] [2021-06-12 19:49:26,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:49:26,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:26,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:49:26,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:49:26,621 INFO L87 Difference]: Start difference. First operand 55757 states and 397114 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:28,018 INFO L93 Difference]: Finished difference Result 92909 states and 637114 transitions. [2021-06-12 19:49:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:49:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-12 19:49:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:28,395 INFO L225 Difference]: With dead ends: 92909 [2021-06-12 19:49:28,395 INFO L226 Difference]: Without dead ends: 68099 [2021-06-12 19:49:28,395 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:49:28,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68099 states. [2021-06-12 19:49:30,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68099 to 55757. [2021-06-12 19:49:30,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55757 states, 55756 states have (on average 7.012267738001292) internal successors, (390976), 55756 states have internal predecessors, (390976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55757 states to 55757 states and 390976 transitions. [2021-06-12 19:49:30,927 INFO L78 Accepts]: Start accepts. Automaton has 55757 states and 390976 transitions. Word has length 34 [2021-06-12 19:49:30,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:30,928 INFO L482 AbstractCegarLoop]: Abstraction has 55757 states and 390976 transitions. [2021-06-12 19:49:30,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:30,928 INFO L276 IsEmpty]: Start isEmpty. Operand 55757 states and 390976 transitions. [2021-06-12 19:49:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 19:49:31,106 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:31,106 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:31,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 19:49:31,308 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:31,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:31,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1460159095, now seen corresponding path program 31 times [2021-06-12 19:49:31,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:31,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295991772] [2021-06-12 19:49:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 19:49:31,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:31,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295991772] [2021-06-12 19:49:31,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295991772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:31,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369245022] [2021-06-12 19:49:31,335 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 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 [2021-06-12 19:49:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:31,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:49:31,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 19:49:31,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369245022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:31,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:31,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:49:31,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886458285] [2021-06-12 19:49:31,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:49:31,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:31,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:49:31,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:49:31,454 INFO L87 Difference]: Start difference. First operand 55757 states and 390976 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-06-12 19:49:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:32,808 INFO L93 Difference]: Finished difference Result 86696 states and 588891 transitions. [2021-06-12 19:49:32,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:49:32,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 34 [2021-06-12 19:49:32,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:33,642 INFO L225 Difference]: With dead ends: 86696 [2021-06-12 19:49:33,643 INFO L226 Difference]: Without dead ends: 71102 [2021-06-12 19:49:33,643 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:49:33,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71102 states. [2021-06-12 19:49:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71102 to 49619. [2021-06-12 19:49:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49619 states, 49618 states have (on average 6.850961344673304) internal successors, (339931), 49618 states have internal predecessors, (339931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49619 states to 49619 states and 339931 transitions. [2021-06-12 19:49:35,776 INFO L78 Accepts]: Start accepts. Automaton has 49619 states and 339931 transitions. Word has length 34 [2021-06-12 19:49:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:35,777 INFO L482 AbstractCegarLoop]: Abstraction has 49619 states and 339931 transitions. [2021-06-12 19:49:35,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-06-12 19:49:35,777 INFO L276 IsEmpty]: Start isEmpty. Operand 49619 states and 339931 transitions. [2021-06-12 19:49:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 19:49:35,912 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:35,912 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:36,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 19:49:36,115 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:36,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:36,115 INFO L82 PathProgramCache]: Analyzing trace with hash -351716319, now seen corresponding path program 32 times [2021-06-12 19:49:36,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:36,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015413945] [2021-06-12 19:49:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 19:49:36,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:36,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015413945] [2021-06-12 19:49:36,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015413945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:36,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932837345] [2021-06-12 19:49:36,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:49:36,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:49:36,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:36,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:49:36,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 19:49:36,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932837345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:36,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:36,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:49:36,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028767549] [2021-06-12 19:49:36,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:49:36,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:36,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:49:36,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:49:36,277 INFO L87 Difference]: Start difference. First operand 49619 states and 339931 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-06-12 19:49:37,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:37,615 INFO L93 Difference]: Finished difference Result 74312 states and 504788 transitions. [2021-06-12 19:49:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:49:37,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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 34 [2021-06-12 19:49:37,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:37,964 INFO L225 Difference]: With dead ends: 74312 [2021-06-12 19:49:37,965 INFO L226 Difference]: Without dead ends: 61961 [2021-06-12 19:49:37,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:49:38,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61961 states. [2021-06-12 19:49:39,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61961 to 46550. [2021-06-12 19:49:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46550 states, 46549 states have (on average 6.78732088766676) internal successors, (315943), 46549 states have internal predecessors, (315943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:39,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46550 states to 46550 states and 315943 transitions. [2021-06-12 19:49:39,770 INFO L78 Accepts]: Start accepts. Automaton has 46550 states and 315943 transitions. Word has length 34 [2021-06-12 19:49:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:39,770 INFO L482 AbstractCegarLoop]: Abstraction has 46550 states and 315943 transitions. [2021-06-12 19:49:39,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 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) [2021-06-12 19:49:39,770 INFO L276 IsEmpty]: Start isEmpty. Operand 46550 states and 315943 transitions. [2021-06-12 19:49:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 19:49:40,265 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:40,265 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:40,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 19:49:40,473 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:40,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:40,473 INFO L82 PathProgramCache]: Analyzing trace with hash -744743329, now seen corresponding path program 33 times [2021-06-12 19:49:40,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:40,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361009461] [2021-06-12 19:49:40,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 19:49:40,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:40,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361009461] [2021-06-12 19:49:40,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361009461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:40,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147464876] [2021-06-12 19:49:40,499 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 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 [2021-06-12 19:49:40,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:49:40,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:40,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:49:40,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 19:49:40,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147464876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:40,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:40,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:49:40,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587388749] [2021-06-12 19:49:40,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:49:40,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:40,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:49:40,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:49:40,615 INFO L87 Difference]: Start difference. First operand 46550 states and 315943 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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) [2021-06-12 19:49:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:41,634 INFO L93 Difference]: Finished difference Result 65072 states and 441884 transitions. [2021-06-12 19:49:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:49:41,634 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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 34 [2021-06-12 19:49:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:41,930 INFO L225 Difference]: With dead ends: 65072 [2021-06-12 19:49:41,930 INFO L226 Difference]: Without dead ends: 58826 [2021-06-12 19:49:41,930 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:49:41,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58826 states. [2021-06-12 19:49:43,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58826 to 52688. [2021-06-12 19:49:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52688 states, 52687 states have (on average 6.79068840510942) internal successors, (357781), 52687 states have internal predecessors, (357781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52688 states to 52688 states and 357781 transitions. [2021-06-12 19:49:44,172 INFO L78 Accepts]: Start accepts. Automaton has 52688 states and 357781 transitions. Word has length 34 [2021-06-12 19:49:44,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:44,172 INFO L482 AbstractCegarLoop]: Abstraction has 52688 states and 357781 transitions. [2021-06-12 19:49:44,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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) [2021-06-12 19:49:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 52688 states and 357781 transitions. [2021-06-12 19:49:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:49:44,351 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:44,351 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:44,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 19:49:44,552 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:44,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:44,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1952484644, now seen corresponding path program 34 times [2021-06-12 19:49:44,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:44,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976950076] [2021-06-12 19:49:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-12 19:49:44,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:44,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976950076] [2021-06-12 19:49:44,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976950076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:44,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750579257] [2021-06-12 19:49:44,608 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 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 [2021-06-12 19:49:44,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:49:44,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:44,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:49:44,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 19:49:44,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750579257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:44,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:44,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-06-12 19:49:44,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997545991] [2021-06-12 19:49:44,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:49:44,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:44,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:49:44,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:49:44,732 INFO L87 Difference]: Start difference. First operand 52688 states and 357781 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 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) [2021-06-12 19:49:47,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:47,338 INFO L93 Difference]: Finished difference Result 164151 states and 1080949 transitions. [2021-06-12 19:49:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:49:47,338 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 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 35 [2021-06-12 19:49:47,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:48,235 INFO L225 Difference]: With dead ends: 164151 [2021-06-12 19:49:48,235 INFO L226 Difference]: Without dead ends: 155058 [2021-06-12 19:49:48,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:49:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155058 states. [2021-06-12 19:49:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155058 to 98860. [2021-06-12 19:49:53,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98860 states, 98859 states have (on average 7.100709090725174) internal successors, (701969), 98859 states have internal predecessors, (701969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:54,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98860 states to 98860 states and 701969 transitions. [2021-06-12 19:49:54,294 INFO L78 Accepts]: Start accepts. Automaton has 98860 states and 701969 transitions. Word has length 35 [2021-06-12 19:49:54,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:54,294 INFO L482 AbstractCegarLoop]: Abstraction has 98860 states and 701969 transitions. [2021-06-12 19:49:54,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 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) [2021-06-12 19:49:54,294 INFO L276 IsEmpty]: Start isEmpty. Operand 98860 states and 701969 transitions. [2021-06-12 19:49:54,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 19:49:54,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:54,689 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:54,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 19:49:54,905 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:49:54,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:54,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1072335793, now seen corresponding path program 35 times [2021-06-12 19:49:54,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:54,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734689545] [2021-06-12 19:49:54,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-12 19:49:54,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:54,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734689545] [2021-06-12 19:49:54,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734689545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:54,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870827615] [2021-06-12 19:49:54,943 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 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 [2021-06-12 19:49:55,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:49:55,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:55,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:49:55,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-12 19:49:55,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870827615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:55,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:55,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-12 19:49:55,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844321671] [2021-06-12 19:49:55,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:49:55,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:55,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:49:55,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:49:55,132 INFO L87 Difference]: Start difference. First operand 98860 states and 701969 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 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) [2021-06-12 19:49:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:57,468 INFO L93 Difference]: Finished difference Result 144978 states and 989665 transitions. [2021-06-12 19:49:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:49:57,468 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 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 36 [2021-06-12 19:49:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:58,944 INFO L225 Difference]: With dead ends: 144978 [2021-06-12 19:49:58,944 INFO L226 Difference]: Without dead ends: 131912 [2021-06-12 19:49:58,944 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:49:59,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131912 states. [2021-06-12 19:50:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131912 to 102815. [2021-06-12 19:50:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102815 states, 102814 states have (on average 7.039090007197464) internal successors, (723717), 102814 states have internal predecessors, (723717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102815 states to 102815 states and 723717 transitions. [2021-06-12 19:50:04,902 INFO L78 Accepts]: Start accepts. Automaton has 102815 states and 723717 transitions. Word has length 36 [2021-06-12 19:50:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:04,902 INFO L482 AbstractCegarLoop]: Abstraction has 102815 states and 723717 transitions. [2021-06-12 19:50:04,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 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) [2021-06-12 19:50:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 102815 states and 723717 transitions. [2021-06-12 19:50:05,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 19:50:05,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:05,758 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:05,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:05,984 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:50:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:05,985 INFO L82 PathProgramCache]: Analyzing trace with hash 776425721, now seen corresponding path program 36 times [2021-06-12 19:50:05,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:05,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891868234] [2021-06-12 19:50:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-12 19:50:06,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:06,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891868234] [2021-06-12 19:50:06,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891868234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:06,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715485565] [2021-06-12 19:50:06,045 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 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 [2021-06-12 19:50:06,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:50:06,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:06,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:50:06,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-12 19:50:06,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715485565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:06,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:06,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:50:06,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649514718] [2021-06-12 19:50:06,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:50:06,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:06,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:50:06,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:50:06,241 INFO L87 Difference]: Start difference. First operand 102815 states and 723717 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:09,079 INFO L93 Difference]: Finished difference Result 163299 states and 1102914 transitions. [2021-06-12 19:50:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:50:09,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 19:50:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:09,833 INFO L225 Difference]: With dead ends: 163299 [2021-06-12 19:50:09,833 INFO L226 Difference]: Without dead ends: 120510 [2021-06-12 19:50:09,833 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:50:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120510 states. [2021-06-12 19:50:13,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120510 to 87490. [2021-06-12 19:50:13,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87490 states, 87489 states have (on average 7.016344911931785) internal successors, (613853), 87489 states have internal predecessors, (613853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87490 states to 87490 states and 613853 transitions. [2021-06-12 19:50:14,958 INFO L78 Accepts]: Start accepts. Automaton has 87490 states and 613853 transitions. Word has length 36 [2021-06-12 19:50:14,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:14,958 INFO L482 AbstractCegarLoop]: Abstraction has 87490 states and 613853 transitions. [2021-06-12 19:50:14,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:14,958 INFO L276 IsEmpty]: Start isEmpty. Operand 87490 states and 613853 transitions. [2021-06-12 19:50:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 19:50:15,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:15,310 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:15,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:15,511 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:50:15,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:15,511 INFO L82 PathProgramCache]: Analyzing trace with hash -2001694799, now seen corresponding path program 37 times [2021-06-12 19:50:15,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:15,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738593357] [2021-06-12 19:50:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-12 19:50:15,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:15,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738593357] [2021-06-12 19:50:15,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738593357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:15,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016303151] [2021-06-12 19:50:15,564 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 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 [2021-06-12 19:50:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:15,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:50:15,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-12 19:50:15,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016303151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:15,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:15,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-12 19:50:15,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190992992] [2021-06-12 19:50:15,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:50:15,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:15,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:50:15,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:50:15,770 INFO L87 Difference]: Start difference. First operand 87490 states and 613853 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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) [2021-06-12 19:50:18,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:18,028 INFO L93 Difference]: Finished difference Result 148260 states and 994640 transitions. [2021-06-12 19:50:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:50:18,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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 36 [2021-06-12 19:50:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:18,803 INFO L225 Difference]: With dead ends: 148260 [2021-06-12 19:50:18,803 INFO L226 Difference]: Without dead ends: 119736 [2021-06-12 19:50:18,803 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:50:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119736 states. [2021-06-12 19:50:22,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119736 to 88381. [2021-06-12 19:50:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88381 states, 88380 states have (on average 6.939499886852229) internal successors, (613313), 88380 states have internal predecessors, (613313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88381 states to 88381 states and 613313 transitions. [2021-06-12 19:50:24,394 INFO L78 Accepts]: Start accepts. Automaton has 88381 states and 613313 transitions. Word has length 36 [2021-06-12 19:50:24,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:24,395 INFO L482 AbstractCegarLoop]: Abstraction has 88381 states and 613313 transitions. [2021-06-12 19:50:24,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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) [2021-06-12 19:50:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 88381 states and 613313 transitions. [2021-06-12 19:50:24,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 19:50:24,856 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:24,856 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:25,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:25,069 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:50:25,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:25,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1133140203, now seen corresponding path program 38 times [2021-06-12 19:50:25,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:25,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478336314] [2021-06-12 19:50:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-12 19:50:25,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:25,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478336314] [2021-06-12 19:50:25,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478336314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:25,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012616039] [2021-06-12 19:50:25,114 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 [2021-06-12 19:50:25,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:50:25,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:25,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:50:25,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-12 19:50:25,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012616039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:25,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:25,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-12 19:50:25,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426277067] [2021-06-12 19:50:25,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:50:25,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:50:25,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:50:25,343 INFO L87 Difference]: Start difference. First operand 88381 states and 613313 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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) [2021-06-12 19:50:28,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:28,052 INFO L93 Difference]: Finished difference Result 154610 states and 1027932 transitions. [2021-06-12 19:50:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:50:28,052 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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 36 [2021-06-12 19:50:28,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:28,779 INFO L225 Difference]: With dead ends: 154610 [2021-06-12 19:50:28,779 INFO L226 Difference]: Without dead ends: 121821 [2021-06-12 19:50:28,779 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:50:28,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121821 states. [2021-06-12 19:50:32,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121821 to 88381. [2021-06-12 19:50:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88381 states, 88380 states have (on average 6.9149015614392395) internal successors, (611139), 88380 states have internal predecessors, (611139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88381 states to 88381 states and 611139 transitions. [2021-06-12 19:50:33,485 INFO L78 Accepts]: Start accepts. Automaton has 88381 states and 611139 transitions. Word has length 36 [2021-06-12 19:50:33,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:33,485 INFO L482 AbstractCegarLoop]: Abstraction has 88381 states and 611139 transitions. [2021-06-12 19:50:33,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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) [2021-06-12 19:50:33,486 INFO L276 IsEmpty]: Start isEmpty. Operand 88381 states and 611139 transitions. [2021-06-12 19:50:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 19:50:33,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:33,815 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:34,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-12 19:50:34,015 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:50:34,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:34,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1642613293, now seen corresponding path program 39 times [2021-06-12 19:50:34,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:34,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814713197] [2021-06-12 19:50:34,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-12 19:50:34,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:34,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814713197] [2021-06-12 19:50:34,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814713197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:34,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503425401] [2021-06-12 19:50:34,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:50:34,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:50:34,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:34,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:50:34,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-06-12 19:50:34,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503425401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:34,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:34,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-06-12 19:50:34,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661219841] [2021-06-12 19:50:34,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:50:34,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:34,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:50:34,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:50:34,233 INFO L87 Difference]: Start difference. First operand 88381 states and 611139 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:38,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:38,068 INFO L93 Difference]: Finished difference Result 188739 states and 1249534 transitions. [2021-06-12 19:50:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 19:50:38,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 19:50:38,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:39,604 INFO L225 Difference]: With dead ends: 188739 [2021-06-12 19:50:39,604 INFO L226 Difference]: Without dead ends: 177820 [2021-06-12 19:50:39,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 428.8ms TimeCoverageRelationStatistics Valid=250, Invalid=2300, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 19:50:39,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177820 states. [2021-06-12 19:50:44,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177820 to 108631. [2021-06-12 19:50:45,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108631 states, 108630 states have (on average 6.994228113780723) internal successors, (759783), 108630 states have internal predecessors, (759783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108631 states to 108631 states and 759783 transitions. [2021-06-12 19:50:46,950 INFO L78 Accepts]: Start accepts. Automaton has 108631 states and 759783 transitions. Word has length 36 [2021-06-12 19:50:46,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:46,951 INFO L482 AbstractCegarLoop]: Abstraction has 108631 states and 759783 transitions. [2021-06-12 19:50:46,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:46,951 INFO L276 IsEmpty]: Start isEmpty. Operand 108631 states and 759783 transitions. [2021-06-12 19:50:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 19:50:47,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:47,606 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:47,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:47,821 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:50:47,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:47,821 INFO L82 PathProgramCache]: Analyzing trace with hash -674266402, now seen corresponding path program 40 times [2021-06-12 19:50:47,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:47,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537721983] [2021-06-12 19:50:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-12 19:50:47,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:47,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537721983] [2021-06-12 19:50:47,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537721983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:47,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483648933] [2021-06-12 19:50:47,895 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 [2021-06-12 19:50:48,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:50:48,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:48,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:50:48,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 19:50:48,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483648933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:48,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:48,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-12 19:50:48,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441722923] [2021-06-12 19:50:48,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:50:48,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:48,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:50:48,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:50:48,230 INFO L87 Difference]: Start difference. First operand 108631 states and 759783 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:52,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:52,034 INFO L93 Difference]: Finished difference Result 223476 states and 1495121 transitions. [2021-06-12 19:50:52,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:50:52,034 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 19:50:52,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:53,543 INFO L225 Difference]: With dead ends: 223476 [2021-06-12 19:50:53,543 INFO L226 Difference]: Without dead ends: 177390 [2021-06-12 19:50:53,543 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:50:53,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177390 states. [2021-06-12 19:50:58,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177390 to 106167. [2021-06-12 19:50:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106167 states, 106166 states have (on average 6.964772149275663) internal successors, (739422), 106166 states have internal predecessors, (739422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106167 states to 106167 states and 739422 transitions. [2021-06-12 19:50:59,347 INFO L78 Accepts]: Start accepts. Automaton has 106167 states and 739422 transitions. Word has length 37 [2021-06-12 19:50:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:59,347 INFO L482 AbstractCegarLoop]: Abstraction has 106167 states and 739422 transitions. [2021-06-12 19:50:59,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:59,347 INFO L276 IsEmpty]: Start isEmpty. Operand 106167 states and 739422 transitions. [2021-06-12 19:50:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 19:50:59,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:59,762 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:59,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:59,962 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:50:59,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:59,963 INFO L82 PathProgramCache]: Analyzing trace with hash 481122298, now seen corresponding path program 41 times [2021-06-12 19:50:59,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:59,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009104758] [2021-06-12 19:50:59,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 19:51:00,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:00,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009104758] [2021-06-12 19:51:00,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009104758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:00,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702014726] [2021-06-12 19:51:00,330 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 [2021-06-12 19:51:00,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:51:00,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:00,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:00,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 19:51:00,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702014726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:00,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:00,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-12 19:51:00,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116981851] [2021-06-12 19:51:00,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:00,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:00,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:00,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:00,536 INFO L87 Difference]: Start difference. First operand 106167 states and 739422 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:03,143 INFO L93 Difference]: Finished difference Result 191961 states and 1284744 transitions. [2021-06-12 19:51:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:51:03,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 19:51:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:05,007 INFO L225 Difference]: With dead ends: 191961 [2021-06-12 19:51:05,007 INFO L226 Difference]: Without dead ends: 159123 [2021-06-12 19:51:05,008 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 445.1ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:51:05,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159123 states. [2021-06-12 19:51:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159123 to 108827. [2021-06-12 19:51:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108827 states, 108826 states have (on average 6.872089390403029) internal successors, (747862), 108826 states have internal predecessors, (747862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108827 states to 108827 states and 747862 transitions. [2021-06-12 19:51:10,906 INFO L78 Accepts]: Start accepts. Automaton has 108827 states and 747862 transitions. Word has length 37 [2021-06-12 19:51:10,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:10,906 INFO L482 AbstractCegarLoop]: Abstraction has 108827 states and 747862 transitions. [2021-06-12 19:51:10,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:10,906 INFO L276 IsEmpty]: Start isEmpty. Operand 108827 states and 747862 transitions. [2021-06-12 19:51:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 19:51:11,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:11,647 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:11,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 19:51:11,872 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:51:11,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:11,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1867325692, now seen corresponding path program 42 times [2021-06-12 19:51:11,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:11,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781969714] [2021-06-12 19:51:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-12 19:51:11,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:11,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781969714] [2021-06-12 19:51:11,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781969714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:11,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487969476] [2021-06-12 19:51:11,917 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 [2021-06-12 19:51:11,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:51:11,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:11,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:51:11,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-06-12 19:51:12,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487969476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:12,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:12,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-12 19:51:12,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051673329] [2021-06-12 19:51:12,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:12,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:12,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:12,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:12,096 INFO L87 Difference]: Start difference. First operand 108827 states and 747862 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 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) [2021-06-12 19:51:15,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:15,349 INFO L93 Difference]: Finished difference Result 190091 states and 1240020 transitions. [2021-06-12 19:51:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 19:51:15,349 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 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 37 [2021-06-12 19:51:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:16,476 INFO L225 Difference]: With dead ends: 190091 [2021-06-12 19:51:16,476 INFO L226 Difference]: Without dead ends: 137534 [2021-06-12 19:51:16,477 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 559.2ms TimeCoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 19:51:16,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137534 states. [2021-06-12 19:51:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137534 to 99038. [2021-06-12 19:51:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99038 states, 99037 states have (on average 6.792249361349799) internal successors, (672684), 99037 states have internal predecessors, (672684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99038 states to 99038 states and 672684 transitions. [2021-06-12 19:51:21,526 INFO L78 Accepts]: Start accepts. Automaton has 99038 states and 672684 transitions. Word has length 37 [2021-06-12 19:51:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:21,526 INFO L482 AbstractCegarLoop]: Abstraction has 99038 states and 672684 transitions. [2021-06-12 19:51:21,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 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) [2021-06-12 19:51:21,526 INFO L276 IsEmpty]: Start isEmpty. Operand 99038 states and 672684 transitions. [2021-06-12 19:51:21,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 19:51:21,915 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:21,915 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:22,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 19:51:22,120 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:51:22,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:22,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1878928166, now seen corresponding path program 43 times [2021-06-12 19:51:22,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:22,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311788858] [2021-06-12 19:51:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 19:51:22,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:22,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311788858] [2021-06-12 19:51:22,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311788858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:22,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919439752] [2021-06-12 19:51:22,206 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 [2021-06-12 19:51:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:22,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:22,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 19:51:22,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919439752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:22,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:22,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:22,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628998703] [2021-06-12 19:51:22,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:51:22,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:22,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:51:22,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:51:22,729 INFO L87 Difference]: Start difference. First operand 99038 states and 672684 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:25,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:25,009 INFO L93 Difference]: Finished difference Result 147129 states and 986771 transitions. [2021-06-12 19:51:25,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:51:25,014 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 19:51:25,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:26,874 INFO L225 Difference]: With dead ends: 147129 [2021-06-12 19:51:26,874 INFO L226 Difference]: Without dead ends: 140734 [2021-06-12 19:51:26,875 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:51:27,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140734 states. [2021-06-12 19:51:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140734 to 99038. [2021-06-12 19:51:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99038 states, 99037 states have (on average 6.792249361349799) internal successors, (672684), 99037 states have internal predecessors, (672684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99038 states to 99038 states and 672684 transitions. [2021-06-12 19:51:32,112 INFO L78 Accepts]: Start accepts. Automaton has 99038 states and 672684 transitions. Word has length 37 [2021-06-12 19:51:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:32,112 INFO L482 AbstractCegarLoop]: Abstraction has 99038 states and 672684 transitions. [2021-06-12 19:51:32,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:32,112 INFO L276 IsEmpty]: Start isEmpty. Operand 99038 states and 672684 transitions. [2021-06-12 19:51:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 19:51:32,485 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:32,485 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:32,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 19:51:32,686 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:51:32,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:32,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1505483020, now seen corresponding path program 44 times [2021-06-12 19:51:32,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:32,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592398343] [2021-06-12 19:51:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 19:51:32,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:32,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592398343] [2021-06-12 19:51:32,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592398343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:32,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793506612] [2021-06-12 19:51:32,741 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 [2021-06-12 19:51:32,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:32,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:32,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:32,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 19:51:32,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793506612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:32,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:32,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:32,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469736066] [2021-06-12 19:51:32,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:51:32,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:32,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:51:32,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:51:32,969 INFO L87 Difference]: Start difference. First operand 99038 states and 672684 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:36,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:36,193 INFO L93 Difference]: Finished difference Result 210905 states and 1398862 transitions. [2021-06-12 19:51:36,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:51:36,193 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 19:51:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:37,734 INFO L225 Difference]: With dead ends: 210905 [2021-06-12 19:51:37,735 INFO L226 Difference]: Without dead ends: 177289 [2021-06-12 19:51:37,735 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 211.8ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:51:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177289 states. [2021-06-12 19:51:41,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177289 to 87818. [2021-06-12 19:51:42,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87818 states, 87817 states have (on average 6.753339330653518) internal successors, (593058), 87817 states have internal predecessors, (593058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87818 states to 87818 states and 593058 transitions. [2021-06-12 19:51:43,163 INFO L78 Accepts]: Start accepts. Automaton has 87818 states and 593058 transitions. Word has length 37 [2021-06-12 19:51:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:43,163 INFO L482 AbstractCegarLoop]: Abstraction has 87818 states and 593058 transitions. [2021-06-12 19:51:43,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 87818 states and 593058 transitions. [2021-06-12 19:51:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 19:51:43,460 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:43,460 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:43,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:43,662 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:51:43,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:43,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1404559502, now seen corresponding path program 45 times [2021-06-12 19:51:43,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:43,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27380030] [2021-06-12 19:51:43,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 19:51:43,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:43,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27380030] [2021-06-12 19:51:43,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27380030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:43,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778234300] [2021-06-12 19:51:43,727 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 [2021-06-12 19:51:43,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:51:43,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:43,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:51:43,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-06-12 19:51:43,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778234300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:43,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:43,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-12 19:51:43,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616999425] [2021-06-12 19:51:43,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:43,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:43,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:43,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:43,945 INFO L87 Difference]: Start difference. First operand 87818 states and 593058 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 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) [2021-06-12 19:51:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:47,848 INFO L93 Difference]: Finished difference Result 192010 states and 1246834 transitions. [2021-06-12 19:51:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 19:51:47,848 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 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 37 [2021-06-12 19:51:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:49,725 INFO L225 Difference]: With dead ends: 192010 [2021-06-12 19:51:49,725 INFO L226 Difference]: Without dead ends: 178847 [2021-06-12 19:51:49,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 607.6ms TimeCoverageRelationStatistics Valid=263, Invalid=3397, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 19:51:50,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178847 states. [2021-06-12 19:51:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178847 to 100736. [2021-06-12 19:51:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100736 states, 100735 states have (on average 6.7786667990271505) internal successors, (682849), 100735 states have internal predecessors, (682849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100736 states to 100736 states and 682849 transitions. [2021-06-12 19:51:56,859 INFO L78 Accepts]: Start accepts. Automaton has 100736 states and 682849 transitions. Word has length 37 [2021-06-12 19:51:56,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:56,860 INFO L482 AbstractCegarLoop]: Abstraction has 100736 states and 682849 transitions. [2021-06-12 19:51:56,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 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) [2021-06-12 19:51:56,860 INFO L276 IsEmpty]: Start isEmpty. Operand 100736 states and 682849 transitions. [2021-06-12 19:51:57,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 19:51:57,659 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:57,659 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:57,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:57,864 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:51:57,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:57,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1180951440, now seen corresponding path program 46 times [2021-06-12 19:51:57,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:57,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583949410] [2021-06-12 19:51:57,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 19:51:57,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:57,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583949410] [2021-06-12 19:51:57,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583949410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:57,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830447966] [2021-06-12 19:51:57,903 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 [2021-06-12 19:51:57,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:57,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:57,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:57,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 19:51:58,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830447966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:58,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:58,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-12 19:51:58,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332099362] [2021-06-12 19:51:58,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:51:58,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:58,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:51:58,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:51:58,074 INFO L87 Difference]: Start difference. First operand 100736 states and 682849 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 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) [2021-06-12 19:52:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:00,650 INFO L93 Difference]: Finished difference Result 180763 states and 1186152 transitions. [2021-06-12 19:52:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:52:00,651 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 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 37 [2021-06-12 19:52:00,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:01,514 INFO L225 Difference]: With dead ends: 180763 [2021-06-12 19:52:01,514 INFO L226 Difference]: Without dead ends: 148324 [2021-06-12 19:52:01,515 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:52:02,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148324 states. [2021-06-12 19:52:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148324 to 100736. [2021-06-12 19:52:05,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100736 states, 100735 states have (on average 6.763855660892441) internal successors, (681357), 100735 states have internal predecessors, (681357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:07,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100736 states to 100736 states and 681357 transitions. [2021-06-12 19:52:07,004 INFO L78 Accepts]: Start accepts. Automaton has 100736 states and 681357 transitions. Word has length 37 [2021-06-12 19:52:07,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:07,004 INFO L482 AbstractCegarLoop]: Abstraction has 100736 states and 681357 transitions. [2021-06-12 19:52:07,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 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) [2021-06-12 19:52:07,005 INFO L276 IsEmpty]: Start isEmpty. Operand 100736 states and 681357 transitions. [2021-06-12 19:52:07,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 19:52:07,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:07,382 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:07,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:07,582 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:52:07,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:07,583 INFO L82 PathProgramCache]: Analyzing trace with hash -25562740, now seen corresponding path program 47 times [2021-06-12 19:52:07,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:07,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002209401] [2021-06-12 19:52:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 19:52:07,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:07,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002209401] [2021-06-12 19:52:07,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002209401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:07,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867441207] [2021-06-12 19:52:07,619 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 [2021-06-12 19:52:07,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:52:07,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:07,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:52:07,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-06-12 19:52:08,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867441207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:08,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:08,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-12 19:52:08,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85535219] [2021-06-12 19:52:08,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:08,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:08,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:08,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:08,103 INFO L87 Difference]: Start difference. First operand 100736 states and 681357 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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) [2021-06-12 19:52:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:13,161 INFO L93 Difference]: Finished difference Result 257569 states and 1635717 transitions. [2021-06-12 19:52:13,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 19:52:13,161 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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 37 [2021-06-12 19:52:13,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:15,923 INFO L225 Difference]: With dead ends: 257569 [2021-06-12 19:52:15,924 INFO L226 Difference]: Without dead ends: 207928 [2021-06-12 19:52:15,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 1182.2ms TimeCoverageRelationStatistics Valid=525, Invalid=6117, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 19:52:16,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207928 states. [2021-06-12 19:52:22,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207928 to 99243. [2021-06-12 19:52:22,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99243 states, 99242 states have (on average 6.815461195864654) internal successors, (676380), 99242 states have internal predecessors, (676380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99243 states to 99243 states and 676380 transitions. [2021-06-12 19:52:23,314 INFO L78 Accepts]: Start accepts. Automaton has 99243 states and 676380 transitions. Word has length 37 [2021-06-12 19:52:23,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:23,314 INFO L482 AbstractCegarLoop]: Abstraction has 99243 states and 676380 transitions. [2021-06-12 19:52:23,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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) [2021-06-12 19:52:23,314 INFO L276 IsEmpty]: Start isEmpty. Operand 99243 states and 676380 transitions. [2021-06-12 19:52:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 19:52:23,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:23,999 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:24,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:24,223 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:52:24,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:24,224 INFO L82 PathProgramCache]: Analyzing trace with hash -931167312, now seen corresponding path program 48 times [2021-06-12 19:52:24,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:24,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677509966] [2021-06-12 19:52:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-12 19:52:24,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:24,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677509966] [2021-06-12 19:52:24,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677509966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:24,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446387967] [2021-06-12 19:52:24,265 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 [2021-06-12 19:52:24,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:52:24,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:24,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:52:24,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-06-12 19:52:24,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446387967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:24,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:24,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-12 19:52:24,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210580981] [2021-06-12 19:52:24,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:24,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:24,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:24,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:24,419 INFO L87 Difference]: Start difference. First operand 99243 states and 676380 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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) [2021-06-12 19:52:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:30,247 INFO L93 Difference]: Finished difference Result 304259 states and 1944342 transitions. [2021-06-12 19:52:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-12 19:52:30,248 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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 37 [2021-06-12 19:52:30,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:31,874 INFO L225 Difference]: With dead ends: 304259 [2021-06-12 19:52:31,875 INFO L226 Difference]: Without dead ends: 214089 [2021-06-12 19:52:31,875 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5022 ImplicationChecksByTransitivity, 1269.5ms TimeCoverageRelationStatistics Valid=1026, Invalid=11856, Unknown=0, NotChecked=0, Total=12882 [2021-06-12 19:52:32,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214089 states. [2021-06-12 19:52:37,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214089 to 120131. [2021-06-12 19:52:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120131 states, 120130 states have (on average 6.801115458253559) internal successors, (817018), 120130 states have internal predecessors, (817018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:40,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120131 states to 120131 states and 817018 transitions. [2021-06-12 19:52:40,028 INFO L78 Accepts]: Start accepts. Automaton has 120131 states and 817018 transitions. Word has length 37 [2021-06-12 19:52:40,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:40,028 INFO L482 AbstractCegarLoop]: Abstraction has 120131 states and 817018 transitions. [2021-06-12 19:52:40,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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) [2021-06-12 19:52:40,028 INFO L276 IsEmpty]: Start isEmpty. Operand 120131 states and 817018 transitions. [2021-06-12 19:52:41,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 19:52:41,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:41,420 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:41,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-12 19:52:41,643 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:52:41,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:41,644 INFO L82 PathProgramCache]: Analyzing trace with hash -944253574, now seen corresponding path program 49 times [2021-06-12 19:52:41,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:41,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296597579] [2021-06-12 19:52:41,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-12 19:52:41,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:41,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296597579] [2021-06-12 19:52:41,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296597579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:41,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399351532] [2021-06-12 19:52:41,724 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 [2021-06-12 19:52:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:41,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:52:41,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 19:52:41,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399351532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:41,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:41,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 19:52:41,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618713290] [2021-06-12 19:52:41,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:41,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:41,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:41,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:41,934 INFO L87 Difference]: Start difference. First operand 120131 states and 817018 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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) [2021-06-12 19:52:49,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:49,139 INFO L93 Difference]: Finished difference Result 412845 states and 2712377 transitions. [2021-06-12 19:52:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:52:49,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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 37 [2021-06-12 19:52:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:51,834 INFO L225 Difference]: With dead ends: 412845 [2021-06-12 19:52:51,834 INFO L226 Difference]: Without dead ends: 208159 [2021-06-12 19:52:51,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 452.5ms TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:52:52,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208159 states. [2021-06-12 19:52:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208159 to 81339. [2021-06-12 19:52:59,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81339 states, 81338 states have (on average 6.60852246182596) internal successors, (537524), 81338 states have internal predecessors, (537524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:00,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81339 states to 81339 states and 537524 transitions. [2021-06-12 19:53:00,121 INFO L78 Accepts]: Start accepts. Automaton has 81339 states and 537524 transitions. Word has length 37 [2021-06-12 19:53:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:00,121 INFO L482 AbstractCegarLoop]: Abstraction has 81339 states and 537524 transitions. [2021-06-12 19:53:00,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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) [2021-06-12 19:53:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 81339 states and 537524 transitions. [2021-06-12 19:53:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 19:53:00,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:00,399 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:00,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:00,599 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:53:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:00,600 INFO L82 PathProgramCache]: Analyzing trace with hash -265285954, now seen corresponding path program 50 times [2021-06-12 19:53:00,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:00,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233484560] [2021-06-12 19:53:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 19:53:00,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:00,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233484560] [2021-06-12 19:53:00,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233484560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:00,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633652941] [2021-06-12 19:53:00,649 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 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 [2021-06-12 19:53:00,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:00,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:00,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:53:00,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-12 19:53:00,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633652941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:00,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:00,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:53:00,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038556347] [2021-06-12 19:53:00,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:00,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:00,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:00,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:00,826 INFO L87 Difference]: Start difference. First operand 81339 states and 537524 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:02,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:02,462 INFO L93 Difference]: Finished difference Result 100680 states and 663750 transitions. [2021-06-12 19:53:02,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:53:02,463 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 19:53:02,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:02,940 INFO L225 Difference]: With dead ends: 100680 [2021-06-12 19:53:02,940 INFO L226 Difference]: Without dead ends: 93275 [2021-06-12 19:53:02,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:53:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93275 states. [2021-06-12 19:53:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93275 to 84323. [2021-06-12 19:53:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84323 states, 84322 states have (on average 6.609212305210977) internal successors, (557302), 84322 states have internal predecessors, (557302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:06,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84323 states to 84323 states and 557302 transitions. [2021-06-12 19:53:06,695 INFO L78 Accepts]: Start accepts. Automaton has 84323 states and 557302 transitions. Word has length 37 [2021-06-12 19:53:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:06,695 INFO L482 AbstractCegarLoop]: Abstraction has 84323 states and 557302 transitions. [2021-06-12 19:53:06,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:06,695 INFO L276 IsEmpty]: Start isEmpty. Operand 84323 states and 557302 transitions. [2021-06-12 19:53:07,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 19:53:07,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:07,364 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:07,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 19:53:07,588 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:53:07,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:07,588 INFO L82 PathProgramCache]: Analyzing trace with hash 941176573, now seen corresponding path program 51 times [2021-06-12 19:53:07,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:07,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307258705] [2021-06-12 19:53:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-06-12 19:53:07,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:07,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307258705] [2021-06-12 19:53:07,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307258705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:07,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226187192] [2021-06-12 19:53:07,653 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 [2021-06-12 19:53:07,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:07,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:07,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:53:07,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 19:53:08,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226187192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:08,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:08,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 19:53:08,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360045646] [2021-06-12 19:53:08,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:53:08,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:08,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:53:08,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:53:08,010 INFO L87 Difference]: Start difference. First operand 84323 states and 557302 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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) [2021-06-12 19:53:10,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:10,209 INFO L93 Difference]: Finished difference Result 138523 states and 880908 transitions. [2021-06-12 19:53:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:53:10,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 38 [2021-06-12 19:53:10,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:11,316 INFO L225 Difference]: With dead ends: 138523 [2021-06-12 19:53:11,316 INFO L226 Difference]: Without dead ends: 121480 [2021-06-12 19:53:11,316 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121480 states. [2021-06-12 19:53:14,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121480 to 82775. [2021-06-12 19:53:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82775 states, 82774 states have (on average 6.541510619276584) internal successors, (541467), 82774 states have internal predecessors, (541467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82775 states to 82775 states and 541467 transitions. [2021-06-12 19:53:15,576 INFO L78 Accepts]: Start accepts. Automaton has 82775 states and 541467 transitions. Word has length 38 [2021-06-12 19:53:15,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:15,576 INFO L482 AbstractCegarLoop]: Abstraction has 82775 states and 541467 transitions. [2021-06-12 19:53:15,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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) [2021-06-12 19:53:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 82775 states and 541467 transitions. [2021-06-12 19:53:15,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 19:53:15,854 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:15,854 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:16,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 19:53:16,054 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:53:16,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:16,055 INFO L82 PathProgramCache]: Analyzing trace with hash -329563039, now seen corresponding path program 52 times [2021-06-12 19:53:16,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:16,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344280712] [2021-06-12 19:53:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 19:53:16,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:16,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344280712] [2021-06-12 19:53:16,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344280712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:16,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785680473] [2021-06-12 19:53:16,084 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 [2021-06-12 19:53:16,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:16,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:16,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:53:16,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 19:53:16,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785680473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:16,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:16,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 19:53:16,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200803157] [2021-06-12 19:53:16,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:53:16,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:16,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:53:16,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:53:16,253 INFO L87 Difference]: Start difference. First operand 82775 states and 541467 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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) [2021-06-12 19:53:17,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:17,838 INFO L93 Difference]: Finished difference Result 127682 states and 811850 transitions. [2021-06-12 19:53:17,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:53:17,838 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 38 [2021-06-12 19:53:17,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:18,824 INFO L225 Difference]: With dead ends: 127682 [2021-06-12 19:53:18,824 INFO L226 Difference]: Without dead ends: 107548 [2021-06-12 19:53:18,824 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:53:18,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107548 states. [2021-06-12 19:53:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107548 to 81227. [2021-06-12 19:53:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.471228424396129) internal successors, (525632), 81226 states have internal predecessors, (525632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:22,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 525632 transitions. [2021-06-12 19:53:22,691 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 525632 transitions. Word has length 38 [2021-06-12 19:53:22,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:22,691 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 525632 transitions. [2021-06-12 19:53:22,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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) [2021-06-12 19:53:22,691 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 525632 transitions. [2021-06-12 19:53:22,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 19:53:22,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:22,961 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:23,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:23,161 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:53:23,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:23,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1350631393, now seen corresponding path program 53 times [2021-06-12 19:53:23,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:23,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866841706] [2021-06-12 19:53:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 19:53:23,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:23,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866841706] [2021-06-12 19:53:23,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866841706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:23,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432374338] [2021-06-12 19:53:23,192 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 [2021-06-12 19:53:23,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:53:23,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:23,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:53:23,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 19:53:23,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432374338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:23,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:23,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:53:23,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620256555] [2021-06-12 19:53:23,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:53:23,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:23,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:53:23,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:53:23,333 INFO L87 Difference]: Start difference. First operand 81227 states and 525632 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 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) [2021-06-12 19:53:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:24,986 INFO L93 Difference]: Finished difference Result 112190 states and 716949 transitions. [2021-06-12 19:53:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:53:24,987 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 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 38 [2021-06-12 19:53:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:25,941 INFO L225 Difference]: With dead ends: 112190 [2021-06-12 19:53:25,942 INFO L226 Difference]: Without dead ends: 109091 [2021-06-12 19:53:25,942 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:53:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109091 states. [2021-06-12 19:53:28,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109091 to 81227. [2021-06-12 19:53:29,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.471228424396129) internal successors, (525632), 81226 states have internal predecessors, (525632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 525632 transitions. [2021-06-12 19:53:30,419 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 525632 transitions. Word has length 38 [2021-06-12 19:53:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:30,420 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 525632 transitions. [2021-06-12 19:53:30,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 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) [2021-06-12 19:53:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 525632 transitions. [2021-06-12 19:53:30,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 19:53:30,902 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:30,902 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:31,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 19:53:31,117 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:53:31,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:31,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1112457229, now seen corresponding path program 54 times [2021-06-12 19:53:31,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:31,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996665356] [2021-06-12 19:53:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 19:53:31,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:31,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996665356] [2021-06-12 19:53:31,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996665356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:31,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522305745] [2021-06-12 19:53:31,180 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 [2021-06-12 19:53:31,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:53:31,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:31,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:53:31,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 19:53:31,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522305745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:31,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:31,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:53:31,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12714757] [2021-06-12 19:53:31,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:53:31,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:31,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:53:31,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:53:31,382 INFO L87 Difference]: Start difference. First operand 81227 states and 525632 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 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) [2021-06-12 19:53:32,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:32,988 INFO L93 Difference]: Finished difference Result 119937 states and 766726 transitions. [2021-06-12 19:53:32,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:53:32,988 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 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 38 [2021-06-12 19:53:32,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:33,937 INFO L225 Difference]: With dead ends: 119937 [2021-06-12 19:53:33,937 INFO L226 Difference]: Without dead ends: 116839 [2021-06-12 19:53:33,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:53:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116839 states. [2021-06-12 19:53:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116839 to 81227. [2021-06-12 19:53:36,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.471228424396129) internal successors, (525632), 81226 states have internal predecessors, (525632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:37,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 525632 transitions. [2021-06-12 19:53:37,780 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 525632 transitions. Word has length 38 [2021-06-12 19:53:37,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:37,780 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 525632 transitions. [2021-06-12 19:53:37,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 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) [2021-06-12 19:53:37,780 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 525632 transitions. [2021-06-12 19:53:38,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 19:53:38,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:38,066 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:38,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:38,266 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:53:38,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:38,267 INFO L82 PathProgramCache]: Analyzing trace with hash -881687477, now seen corresponding path program 55 times [2021-06-12 19:53:38,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:38,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113742840] [2021-06-12 19:53:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 19:53:38,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:38,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113742840] [2021-06-12 19:53:38,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113742840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:38,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525560055] [2021-06-12 19:53:38,297 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 [2021-06-12 19:53:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:38,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:53:38,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 19:53:38,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525560055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:38,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:38,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-12 19:53:38,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035381585] [2021-06-12 19:53:38,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:53:38,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:38,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:53:38,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:53:38,448 INFO L87 Difference]: Start difference. First operand 81227 states and 525632 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:40,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:40,052 INFO L93 Difference]: Finished difference Result 113755 states and 717330 transitions. [2021-06-12 19:53:40,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:40,053 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-12 19:53:40,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:40,912 INFO L225 Difference]: With dead ends: 113755 [2021-06-12 19:53:40,912 INFO L226 Difference]: Without dead ends: 102909 [2021-06-12 19:53:40,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:41,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102909 states. [2021-06-12 19:53:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102909 to 81227. [2021-06-12 19:53:43,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.452170487282397) internal successors, (524084), 81226 states have internal predecessors, (524084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 524084 transitions. [2021-06-12 19:53:44,461 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 524084 transitions. Word has length 38 [2021-06-12 19:53:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:44,461 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 524084 transitions. [2021-06-12 19:53:44,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 524084 transitions. [2021-06-12 19:53:44,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 19:53:44,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:44,738 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:44,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-12 19:53:44,939 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:53:44,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:44,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2142540207, now seen corresponding path program 56 times [2021-06-12 19:53:44,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:44,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353099374] [2021-06-12 19:53:44,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:44,968 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 19:53:44,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:44,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353099374] [2021-06-12 19:53:44,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353099374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:44,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080479882] [2021-06-12 19:53:44,969 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 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 [2021-06-12 19:53:45,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:45,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:45,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:53:45,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 19:53:45,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080479882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:45,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:45,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-12 19:53:45,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802477010] [2021-06-12 19:53:45,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:53:45,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:45,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:53:45,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:53:45,087 INFO L87 Difference]: Start difference. First operand 81227 states and 524084 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:46,667 INFO L93 Difference]: Finished difference Result 107558 states and 678750 transitions. [2021-06-12 19:53:46,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:53:46,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-12 19:53:46,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:47,736 INFO L225 Difference]: With dead ends: 107558 [2021-06-12 19:53:47,737 INFO L226 Difference]: Without dead ends: 99816 [2021-06-12 19:53:47,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:53:47,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99816 states. [2021-06-12 19:53:50,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99816 to 79679. [2021-06-12 19:53:50,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79679 states, 79678 states have (on average 6.398215316649514) internal successors, (509797), 79678 states have internal predecessors, (509797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79679 states to 79679 states and 509797 transitions. [2021-06-12 19:53:51,649 INFO L78 Accepts]: Start accepts. Automaton has 79679 states and 509797 transitions. Word has length 38 [2021-06-12 19:53:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:51,649 INFO L482 AbstractCegarLoop]: Abstraction has 79679 states and 509797 transitions. [2021-06-12 19:53:51,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 79679 states and 509797 transitions. [2021-06-12 19:53:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 19:53:51,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:51,910 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:52,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:52,112 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:53:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:52,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1121471853, now seen corresponding path program 57 times [2021-06-12 19:53:52,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:52,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024871642] [2021-06-12 19:53:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-06-12 19:53:52,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:52,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024871642] [2021-06-12 19:53:52,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024871642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:52,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567217724] [2021-06-12 19:53:52,144 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 [2021-06-12 19:53:52,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:52,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:52,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:53:52,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 19:53:52,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567217724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:52,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:52,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 19:53:52,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293485436] [2021-06-12 19:53:52,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:53:52,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:52,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:53:52,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:53:52,668 INFO L87 Difference]: Start difference. First operand 79679 states and 509797 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:54,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:54,390 INFO L93 Difference]: Finished difference Result 140075 states and 878174 transitions. [2021-06-12 19:53:54,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:53:54,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-12 19:53:54,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:54,988 INFO L225 Difference]: With dead ends: 140075 [2021-06-12 19:53:54,988 INFO L226 Difference]: Without dead ends: 105995 [2021-06-12 19:53:54,988 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:53:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105995 states. [2021-06-12 19:53:57,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105995 to 70391. [2021-06-12 19:53:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70391 states, 70390 states have (on average 6.35452479045319) internal successors, (447295), 70390 states have internal predecessors, (447295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:58,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70391 states to 70391 states and 447295 transitions. [2021-06-12 19:53:58,565 INFO L78 Accepts]: Start accepts. Automaton has 70391 states and 447295 transitions. Word has length 38 [2021-06-12 19:53:58,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:58,565 INFO L482 AbstractCegarLoop]: Abstraction has 70391 states and 447295 transitions. [2021-06-12 19:53:58,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand 70391 states and 447295 transitions. [2021-06-12 19:53:58,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 19:53:58,792 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:58,792 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:58,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-12 19:53:58,993 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:53:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:58,993 INFO L82 PathProgramCache]: Analyzing trace with hash 554192305, now seen corresponding path program 58 times [2021-06-12 19:53:58,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:58,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25035779] [2021-06-12 19:53:58,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 19:53:59,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:59,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25035779] [2021-06-12 19:53:59,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25035779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:59,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710286123] [2021-06-12 19:53:59,030 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 [2021-06-12 19:53:59,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:59,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:59,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:53:59,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 19:53:59,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710286123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:59,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:59,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:53:59,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613779566] [2021-06-12 19:53:59,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:53:59,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:59,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:53:59,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:53:59,166 INFO L87 Difference]: Start difference. First operand 70391 states and 447295 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) [2021-06-12 19:54:00,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:00,472 INFO L93 Difference]: Finished difference Result 82778 states and 524444 transitions. [2021-06-12 19:54:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:00,472 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 38 [2021-06-12 19:54:00,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:00,876 INFO L225 Difference]: With dead ends: 82778 [2021-06-12 19:54:00,877 INFO L226 Difference]: Without dead ends: 79679 [2021-06-12 19:54:00,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:00,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79679 states. [2021-06-12 19:54:03,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79679 to 73487. [2021-06-12 19:54:03,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73487 states, 73486 states have (on average 6.349250197316496) internal successors, (466581), 73486 states have internal predecessors, (466581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:03,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73487 states to 73487 states and 466581 transitions. [2021-06-12 19:54:03,939 INFO L78 Accepts]: Start accepts. Automaton has 73487 states and 466581 transitions. Word has length 38 [2021-06-12 19:54:03,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:03,939 INFO L482 AbstractCegarLoop]: Abstraction has 73487 states and 466581 transitions. [2021-06-12 19:54:03,939 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) [2021-06-12 19:54:03,939 INFO L276 IsEmpty]: Start isEmpty. Operand 73487 states and 466581 transitions. [2021-06-12 19:54:04,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 19:54:04,197 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:04,197 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:04,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:04,397 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:54:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:04,397 INFO L82 PathProgramCache]: Analyzing trace with hash -41639662, now seen corresponding path program 59 times [2021-06-12 19:54:04,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:04,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315001987] [2021-06-12 19:54:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 19:54:04,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:04,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315001987] [2021-06-12 19:54:04,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315001987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:04,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381065662] [2021-06-12 19:54:04,445 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 [2021-06-12 19:54:04,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:54:04,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:04,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:54:04,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 19:54:04,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381065662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:04,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:04,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 10 [2021-06-12 19:54:04,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932812955] [2021-06-12 19:54:04,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:54:04,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:04,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:54:04,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:54:04,713 INFO L87 Difference]: Start difference. First operand 73487 states and 466581 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) [2021-06-12 19:54:06,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:06,514 INFO L93 Difference]: Finished difference Result 155912 states and 983338 transitions. [2021-06-12 19:54:06,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:54:06,514 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 39 [2021-06-12 19:54:06,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:08,383 INFO L225 Difference]: With dead ends: 155912 [2021-06-12 19:54:08,383 INFO L226 Difference]: Without dead ends: 151952 [2021-06-12 19:54:08,384 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:54:08,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151952 states. [2021-06-12 19:54:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151952 to 119841. [2021-06-12 19:54:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119841 states, 119840 states have (on average 6.5424148865153535) internal successors, (784043), 119840 states have internal predecessors, (784043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:14,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119841 states to 119841 states and 784043 transitions. [2021-06-12 19:54:14,966 INFO L78 Accepts]: Start accepts. Automaton has 119841 states and 784043 transitions. Word has length 39 [2021-06-12 19:54:14,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:14,966 INFO L482 AbstractCegarLoop]: Abstraction has 119841 states and 784043 transitions. [2021-06-12 19:54:14,966 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) [2021-06-12 19:54:14,966 INFO L276 IsEmpty]: Start isEmpty. Operand 119841 states and 784043 transitions. [2021-06-12 19:54:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 19:54:15,401 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:15,401 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:15,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-12 19:54:15,601 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:54:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:15,602 INFO L82 PathProgramCache]: Analyzing trace with hash -2062562636, now seen corresponding path program 60 times [2021-06-12 19:54:15,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:15,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412834262] [2021-06-12 19:54:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-12 19:54:15,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:15,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412834262] [2021-06-12 19:54:15,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412834262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:15,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546133533] [2021-06-12 19:54:15,656 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 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 [2021-06-12 19:54:15,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:54:15,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:15,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:54:15,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 19:54:16,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546133533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:16,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:16,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-12 19:54:16,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971342816] [2021-06-12 19:54:16,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:16,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:16,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:16,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:16,229 INFO L87 Difference]: Start difference. First operand 119841 states and 784043 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:21,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:21,415 INFO L93 Difference]: Finished difference Result 363219 states and 2317845 transitions. [2021-06-12 19:54:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 19:54:21,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 19:54:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:24,497 INFO L225 Difference]: With dead ends: 363219 [2021-06-12 19:54:24,497 INFO L226 Difference]: Without dead ends: 351491 [2021-06-12 19:54:24,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 820.9ms TimeCoverageRelationStatistics Valid=198, Invalid=2154, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 19:54:25,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351491 states. [2021-06-12 19:54:36,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351491 to 205350. [2021-06-12 19:54:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205350 states, 205349 states have (on average 6.88260960608525) internal successors, (1413337), 205349 states have internal predecessors, (1413337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:40,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205350 states to 205350 states and 1413337 transitions. [2021-06-12 19:54:40,268 INFO L78 Accepts]: Start accepts. Automaton has 205350 states and 1413337 transitions. Word has length 39 [2021-06-12 19:54:40,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:40,268 INFO L482 AbstractCegarLoop]: Abstraction has 205350 states and 1413337 transitions. [2021-06-12 19:54:40,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 205350 states and 1413337 transitions. [2021-06-12 19:54:42,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 19:54:42,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:42,452 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:42,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:42,665 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 19:54:42,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:42,665 INFO L82 PathProgramCache]: Analyzing trace with hash -828443812, now seen corresponding path program 61 times [2021-06-12 19:54:42,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:42,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452413494] [2021-06-12 19:54:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-12 19:54:42,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:42,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452413494] [2021-06-12 19:54:42,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452413494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:42,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020853699] [2021-06-12 19:54:42,758 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 [2021-06-12 19:54:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:42,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:54:42,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-06-12 19:54:42,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020853699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:42,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:42,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-12 19:54:42,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571914140] [2021-06-12 19:54:42,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:54:42,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:42,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:54:42,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:54:42,953 INFO L87 Difference]: Start difference. First operand 205350 states and 1413337 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 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)