/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/substring-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:02:12,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:02:12,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:02:12,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:02:12,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:02:12,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:02:12,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:02:12,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:02:12,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:02:12,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:02:12,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:02:12,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:02:12,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:02:12,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:02:12,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:02:12,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:02:12,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:02:12,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:02:12,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:02:12,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:02:12,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:02:12,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:02:12,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:02:12,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:02:12,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:02:12,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:02:12,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:02:12,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:02:12,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:02:12,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:02:12,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:02:12,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:02:12,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:02:12,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:02:12,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:02:12,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:02:12,481 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:02:12,509 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:02:12,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:02:12,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:02:12,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:02:12,512 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:02:12,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:02:12,512 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:02:12,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:02:12,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:02:12,513 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:02:12,513 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:02:12,513 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:02:12,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:02:12,514 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:02:12,514 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:02:12,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:02:12,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:02:12,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:02:12,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:02:12,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:02:12,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:02:12,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:02:12,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:02:12,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:02:12,516 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:02:12,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:02:12,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:02:12,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:02:12,942 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:02:12,943 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:02:12,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2020-12-22 19:02:13,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c9c87894/660365010f9b464b8f7d06abcc6a1d4b/FLAG665e8c2fd [2020-12-22 19:02:13,888 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:02:13,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2020-12-22 19:02:13,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c9c87894/660365010f9b464b8f7d06abcc6a1d4b/FLAG665e8c2fd [2020-12-22 19:02:14,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c9c87894/660365010f9b464b8f7d06abcc6a1d4b [2020-12-22 19:02:14,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:02:14,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:02:14,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:02:14,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:02:14,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:02:14,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:02:14" (1/1) ... [2020-12-22 19:02:14,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b37b33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:14, skipping insertion in model container [2020-12-22 19:02:14,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:02:14" (1/1) ... [2020-12-22 19:02:14,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:02:14,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:02:14,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:02:14,581 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:02:14,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:02:14,723 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:02:14,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:14 WrapperNode [2020-12-22 19:02:14,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:02:14,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:02:14,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:02:14,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:02:14,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:14" (1/1) ... [2020-12-22 19:02:14,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:14" (1/1) ... [2020-12-22 19:02:14,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:02:14,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:02:14,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:02:14,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:02:14,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:14" (1/1) ... [2020-12-22 19:02:14,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:14" (1/1) ... [2020-12-22 19:02:14,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:14" (1/1) ... [2020-12-22 19:02:14,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:14" (1/1) ... [2020-12-22 19:02:14,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:14" (1/1) ... [2020-12-22 19:02:14,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:14" (1/1) ... [2020-12-22 19:02:14,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:14" (1/1) ... [2020-12-22 19:02:14,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:02:14,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:02:14,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:02:14,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:02:14,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:14" (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 [2020-12-22 19:02:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:02:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:02:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:02:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:02:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:02:15,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:02:15,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:02:15,629 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-22 19:02:15,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:02:15 BoogieIcfgContainer [2020-12-22 19:02:15,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:02:15,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:02:15,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:02:15,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:02:15,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:02:14" (1/3) ... [2020-12-22 19:02:15,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17190652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:02:15, skipping insertion in model container [2020-12-22 19:02:15,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:02:14" (2/3) ... [2020-12-22 19:02:15,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17190652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:02:15, skipping insertion in model container [2020-12-22 19:02:15,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:02:15" (3/3) ... [2020-12-22 19:02:15,642 INFO L111 eAbstractionObserver]: Analyzing ICFG substring-alloca-2.i [2020-12-22 19:02:15,650 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:02:15,657 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-12-22 19:02:15,680 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-12-22 19:02:15,707 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:02:15,708 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:02:15,708 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:02:15,708 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:02:15,708 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:02:15,708 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:02:15,709 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:02:15,709 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:02:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-12-22 19:02:15,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:02:15,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:15,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:15,736 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:15,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:15,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-12-22 19:02:15,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:15,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213010286] [2020-12-22 19:02:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:15,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213010286] [2020-12-22 19:02:15,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:15,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:02:15,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921654510] [2020-12-22 19:02:15,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:02:15,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:16,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:02:16,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:02:16,016 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 4 states. [2020-12-22 19:02:16,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:16,119 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2020-12-22 19:02:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:02:16,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 19:02:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:16,146 INFO L225 Difference]: With dead ends: 96 [2020-12-22 19:02:16,147 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 19:02:16,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:02:16,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 19:02:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 53. [2020-12-22 19:02:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 19:02:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-12-22 19:02:16,204 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2020-12-22 19:02:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:16,204 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-12-22 19:02:16,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:02:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-12-22 19:02:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:02:16,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:16,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:16,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:02:16,206 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:16,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2020-12-22 19:02:16,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:16,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598118175] [2020-12-22 19:02:16,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:16,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598118175] [2020-12-22 19:02:16,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:16,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:02:16,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185940189] [2020-12-22 19:02:16,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:02:16,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:16,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:02:16,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:02:16,277 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 3 states. [2020-12-22 19:02:16,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:16,320 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-12-22 19:02:16,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:02:16,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 19:02:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:16,322 INFO L225 Difference]: With dead ends: 51 [2020-12-22 19:02:16,322 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 19:02:16,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:02:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 19:02:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 19:02:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 19:02:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-12-22 19:02:16,330 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2020-12-22 19:02:16,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:16,331 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-12-22 19:02:16,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:02:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-12-22 19:02:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:02:16,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:16,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:16,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:02:16,332 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:16,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:16,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2020-12-22 19:02:16,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:16,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943228497] [2020-12-22 19:02:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:16,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943228497] [2020-12-22 19:02:16,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:16,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:02:16,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115352021] [2020-12-22 19:02:16,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:02:16,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:16,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:02:16,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:02:16,449 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 4 states. [2020-12-22 19:02:16,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:16,616 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2020-12-22 19:02:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:02:16,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 19:02:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:16,618 INFO L225 Difference]: With dead ends: 93 [2020-12-22 19:02:16,618 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 19:02:16,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:02:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 19:02:16,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-12-22 19:02:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 19:02:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-12-22 19:02:16,627 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 7 [2020-12-22 19:02:16,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:16,627 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-12-22 19:02:16,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:02:16,627 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-12-22 19:02:16,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:02:16,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:16,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:16,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:02:16,629 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:16,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:16,630 INFO L82 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2020-12-22 19:02:16,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:16,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977930363] [2020-12-22 19:02:16,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:16,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977930363] [2020-12-22 19:02:16,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:16,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:02:16,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897527942] [2020-12-22 19:02:16,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:02:16,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:16,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:02:16,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:02:16,722 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 4 states. [2020-12-22 19:02:16,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:16,812 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-12-22 19:02:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:02:16,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 19:02:16,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:16,817 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:02:16,819 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 19:02:16,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:02:16,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 19:02:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 19:02:16,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 19:02:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-12-22 19:02:16,831 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 9 [2020-12-22 19:02:16,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:16,831 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-12-22 19:02:16,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:02:16,832 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-12-22 19:02:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:02:16,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:16,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:16,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:02:16,833 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:16,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:16,835 INFO L82 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2020-12-22 19:02:16,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:16,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024613839] [2020-12-22 19:02:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:16,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024613839] [2020-12-22 19:02:16,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:16,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:02:16,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100327906] [2020-12-22 19:02:16,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:02:16,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:16,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:02:16,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:02:16,954 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 4 states. [2020-12-22 19:02:17,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:17,000 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2020-12-22 19:02:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:02:17,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 19:02:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:17,002 INFO L225 Difference]: With dead ends: 94 [2020-12-22 19:02:17,002 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 19:02:17,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:02:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 19:02:17,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2020-12-22 19:02:17,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 19:02:17,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-12-22 19:02:17,010 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2020-12-22 19:02:17,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:17,011 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-12-22 19:02:17,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:02:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-12-22 19:02:17,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:02:17,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:17,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:17,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 19:02:17,013 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:17,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:17,013 INFO L82 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2020-12-22 19:02:17,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:17,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360698596] [2020-12-22 19:02:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:17,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360698596] [2020-12-22 19:02:17,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:17,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:02:17,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465394990] [2020-12-22 19:02:17,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:02:17,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:17,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:02:17,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:02:17,049 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 3 states. [2020-12-22 19:02:17,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:17,091 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-12-22 19:02:17,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:02:17,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-22 19:02:17,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:17,093 INFO L225 Difference]: With dead ends: 61 [2020-12-22 19:02:17,094 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 19:02:17,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:02:17,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 19:02:17,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-12-22 19:02:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 19:02:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-12-22 19:02:17,116 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2020-12-22 19:02:17,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:17,116 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-12-22 19:02:17,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:02:17,117 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-12-22 19:02:17,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:02:17,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:17,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:17,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 19:02:17,124 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:17,125 INFO L82 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2020-12-22 19:02:17,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:17,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131463443] [2020-12-22 19:02:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:17,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131463443] [2020-12-22 19:02:17,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:17,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:02:17,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114178690] [2020-12-22 19:02:17,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:02:17,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:17,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:02:17,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:02:17,213 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 5 states. [2020-12-22 19:02:17,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:17,326 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2020-12-22 19:02:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:02:17,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 19:02:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:17,329 INFO L225 Difference]: With dead ends: 94 [2020-12-22 19:02:17,329 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 19:02:17,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:02:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 19:02:17,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2020-12-22 19:02:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 19:02:17,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-12-22 19:02:17,348 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 9 [2020-12-22 19:02:17,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:17,348 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-12-22 19:02:17,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:02:17,349 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-12-22 19:02:17,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 19:02:17,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:17,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:17,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 19:02:17,353 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:17,353 INFO L82 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2020-12-22 19:02:17,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:17,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99635880] [2020-12-22 19:02:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:17,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99635880] [2020-12-22 19:02:17,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:17,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:02:17,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071914722] [2020-12-22 19:02:17,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:02:17,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:17,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:02:17,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:02:17,453 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 4 states. [2020-12-22 19:02:17,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:17,491 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-12-22 19:02:17,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:02:17,491 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 19:02:17,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:17,493 INFO L225 Difference]: With dead ends: 62 [2020-12-22 19:02:17,493 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 19:02:17,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:02:17,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 19:02:17,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-22 19:02:17,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 19:02:17,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-12-22 19:02:17,505 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 10 [2020-12-22 19:02:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:17,506 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-12-22 19:02:17,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:02:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-12-22 19:02:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 19:02:17,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:17,508 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:17,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 19:02:17,508 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:17,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:17,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-12-22 19:02:17,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:17,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295941982] [2020-12-22 19:02:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:17,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295941982] [2020-12-22 19:02:17,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359032273] [2020-12-22 19:02:17,627 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 [2020-12-22 19:02:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:17,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:02:17,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:17,770 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_22|], 1=[|v_#valid_30|]} [2020-12-22 19:02:17,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:02:17,793 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:02:17,796 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:17,815 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:17,823 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:02:17,831 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:17,839 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:17,843 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:17,844 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:02:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:17,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:17,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 19:02:17,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314168380] [2020-12-22 19:02:17,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:02:17,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:17,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:02:17,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:02:17,886 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 6 states. [2020-12-22 19:02:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:18,040 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-12-22 19:02:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:02:18,041 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-22 19:02:18,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:18,042 INFO L225 Difference]: With dead ends: 103 [2020-12-22 19:02:18,042 INFO L226 Difference]: Without dead ends: 103 [2020-12-22 19:02:18,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:02:18,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-22 19:02:18,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-12-22 19:02:18,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 19:02:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-12-22 19:02:18,046 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 11 [2020-12-22 19:02:18,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:18,047 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-12-22 19:02:18,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:02:18,047 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-12-22 19:02:18,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 19:02:18,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:18,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:18,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 19:02:18,263 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:18,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:18,265 INFO L82 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2020-12-22 19:02:18,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:18,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300654728] [2020-12-22 19:02:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:18,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300654728] [2020-12-22 19:02:18,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:18,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:02:18,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088216983] [2020-12-22 19:02:18,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:02:18,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:18,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:02:18,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:02:18,367 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 6 states. [2020-12-22 19:02:18,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:18,476 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-12-22 19:02:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:02:18,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-22 19:02:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:18,478 INFO L225 Difference]: With dead ends: 81 [2020-12-22 19:02:18,478 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 19:02:18,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:02:18,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 19:02:18,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2020-12-22 19:02:18,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 19:02:18,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2020-12-22 19:02:18,482 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 12 [2020-12-22 19:02:18,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:18,482 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2020-12-22 19:02:18,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:02:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2020-12-22 19:02:18,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 19:02:18,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:18,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:18,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 19:02:18,484 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:18,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:18,484 INFO L82 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2020-12-22 19:02:18,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:18,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908798952] [2020-12-22 19:02:18,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:18,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908798952] [2020-12-22 19:02:18,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:18,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:02:18,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565689389] [2020-12-22 19:02:18,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:02:18,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:18,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:02:18,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:02:18,516 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 4 states. [2020-12-22 19:02:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:18,565 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-12-22 19:02:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:02:18,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-22 19:02:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:18,567 INFO L225 Difference]: With dead ends: 57 [2020-12-22 19:02:18,567 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 19:02:18,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:02:18,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 19:02:18,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 19:02:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 19:02:18,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-12-22 19:02:18,571 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2020-12-22 19:02:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:18,571 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-12-22 19:02:18,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:02:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-12-22 19:02:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:02:18,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:18,575 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:18,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 19:02:18,575 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:18,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2020-12-22 19:02:18,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:18,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902490591] [2020-12-22 19:02:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:18,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902490591] [2020-12-22 19:02:18,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185269347] [2020-12-22 19:02:18,685 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 [2020-12-22 19:02:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:18,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 19:02:18,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:18,807 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:18,807 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:02:18,816 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:18,848 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:02:18,855 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:18,856 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:02:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:18,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:18,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 19:02:18,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087013272] [2020-12-22 19:02:18,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:02:18,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:18,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:02:18,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:02:18,947 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 7 states. [2020-12-22 19:02:19,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:19,117 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2020-12-22 19:02:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:02:19,117 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-22 19:02:19,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:19,118 INFO L225 Difference]: With dead ends: 86 [2020-12-22 19:02:19,118 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 19:02:19,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:02:19,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 19:02:19,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2020-12-22 19:02:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 19:02:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-12-22 19:02:19,121 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 13 [2020-12-22 19:02:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:19,121 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-12-22 19:02:19,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:02:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-12-22 19:02:19,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 19:02:19,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:19,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:19,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 19:02:19,338 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:19,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:19,339 INFO L82 PathProgramCache]: Analyzing trace with hash 172811107, now seen corresponding path program 1 times [2020-12-22 19:02:19,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:19,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612823854] [2020-12-22 19:02:19,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:19,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612823854] [2020-12-22 19:02:19,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:19,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:02:19,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124754431] [2020-12-22 19:02:19,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:02:19,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:19,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:02:19,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:02:19,400 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 5 states. [2020-12-22 19:02:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:19,523 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-12-22 19:02:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:02:19,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-22 19:02:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:19,524 INFO L225 Difference]: With dead ends: 54 [2020-12-22 19:02:19,524 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 19:02:19,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:02:19,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 19:02:19,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-12-22 19:02:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 19:02:19,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-12-22 19:02:19,527 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 14 [2020-12-22 19:02:19,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:19,527 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-12-22 19:02:19,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:02:19,527 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-12-22 19:02:19,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 19:02:19,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:19,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:19,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 19:02:19,529 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:19,529 INFO L82 PathProgramCache]: Analyzing trace with hash 172811108, now seen corresponding path program 1 times [2020-12-22 19:02:19,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:19,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803703982] [2020-12-22 19:02:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:19,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803703982] [2020-12-22 19:02:19,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:19,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 19:02:19,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206675805] [2020-12-22 19:02:19,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:02:19,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:19,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:02:19,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:02:19,612 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 7 states. [2020-12-22 19:02:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:19,736 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-12-22 19:02:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:02:19,738 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-22 19:02:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:19,739 INFO L225 Difference]: With dead ends: 69 [2020-12-22 19:02:19,739 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 19:02:19,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:02:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 19:02:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-12-22 19:02:19,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 19:02:19,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-12-22 19:02:19,743 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 14 [2020-12-22 19:02:19,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:19,744 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-12-22 19:02:19,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:02:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-12-22 19:02:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 19:02:19,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:19,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:19,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 19:02:19,745 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:19,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1432273078, now seen corresponding path program 1 times [2020-12-22 19:02:19,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:19,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977104939] [2020-12-22 19:02:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:19,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977104939] [2020-12-22 19:02:19,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:19,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:02:19,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338856457] [2020-12-22 19:02:19,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:02:19,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:19,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:02:19,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:02:19,805 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 4 states. [2020-12-22 19:02:19,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:19,834 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2020-12-22 19:02:19,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:02:19,835 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-22 19:02:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:19,836 INFO L225 Difference]: With dead ends: 58 [2020-12-22 19:02:19,836 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 19:02:19,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:02:19,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 19:02:19,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-22 19:02:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 19:02:19,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2020-12-22 19:02:19,838 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 16 [2020-12-22 19:02:19,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:19,838 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2020-12-22 19:02:19,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:02:19,839 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2020-12-22 19:02:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 19:02:19,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:19,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:19,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 19:02:19,840 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:19,840 INFO L82 PathProgramCache]: Analyzing trace with hash -2001954455, now seen corresponding path program 1 times [2020-12-22 19:02:19,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:19,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75182720] [2020-12-22 19:02:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:19,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75182720] [2020-12-22 19:02:19,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:19,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:02:19,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425160281] [2020-12-22 19:02:19,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:02:19,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:19,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:02:19,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:02:19,871 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 4 states. [2020-12-22 19:02:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:19,917 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-12-22 19:02:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:02:19,918 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-22 19:02:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:19,918 INFO L225 Difference]: With dead ends: 55 [2020-12-22 19:02:19,918 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 19:02:19,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:02:19,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 19:02:19,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-22 19:02:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 19:02:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-12-22 19:02:19,922 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 18 [2020-12-22 19:02:19,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:19,922 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-12-22 19:02:19,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:02:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-12-22 19:02:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 19:02:19,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:19,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:19,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 19:02:19,923 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:19,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2001954454, now seen corresponding path program 1 times [2020-12-22 19:02:19,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:19,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561699633] [2020-12-22 19:02:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:19,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561699633] [2020-12-22 19:02:19,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:19,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 19:02:19,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766935304] [2020-12-22 19:02:19,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:02:19,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:19,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:02:19,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:02:19,998 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 7 states. [2020-12-22 19:02:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:20,151 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2020-12-22 19:02:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:02:20,152 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-22 19:02:20,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:20,152 INFO L225 Difference]: With dead ends: 80 [2020-12-22 19:02:20,152 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 19:02:20,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:02:20,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 19:02:20,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2020-12-22 19:02:20,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 19:02:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-12-22 19:02:20,156 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 18 [2020-12-22 19:02:20,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:20,156 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-12-22 19:02:20,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:02:20,156 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-12-22 19:02:20,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 19:02:20,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:20,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:20,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 19:02:20,157 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:20,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:20,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2001945381, now seen corresponding path program 1 times [2020-12-22 19:02:20,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:20,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560346413] [2020-12-22 19:02:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:20,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560346413] [2020-12-22 19:02:20,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:20,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:02:20,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514892045] [2020-12-22 19:02:20,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:02:20,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:20,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:02:20,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:02:20,185 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand 3 states. [2020-12-22 19:02:20,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:20,194 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-12-22 19:02:20,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:02:20,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-22 19:02:20,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:20,195 INFO L225 Difference]: With dead ends: 62 [2020-12-22 19:02:20,195 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 19:02:20,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:02:20,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 19:02:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-22 19:02:20,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 19:02:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2020-12-22 19:02:20,197 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 18 [2020-12-22 19:02:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:20,198 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2020-12-22 19:02:20,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:02:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2020-12-22 19:02:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 19:02:20,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:20,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:20,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 19:02:20,199 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:20,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:20,200 INFO L82 PathProgramCache]: Analyzing trace with hash 275803338, now seen corresponding path program 1 times [2020-12-22 19:02:20,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:20,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619569356] [2020-12-22 19:02:20,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:20,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619569356] [2020-12-22 19:02:20,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:20,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 19:02:20,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220113580] [2020-12-22 19:02:20,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:02:20,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:20,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:02:20,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:02:20,244 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 6 states. [2020-12-22 19:02:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:20,360 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-12-22 19:02:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:02:20,360 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-22 19:02:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:20,361 INFO L225 Difference]: With dead ends: 66 [2020-12-22 19:02:20,361 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 19:02:20,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:02:20,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 19:02:20,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-12-22 19:02:20,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 19:02:20,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-12-22 19:02:20,364 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 20 [2020-12-22 19:02:20,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:20,364 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-12-22 19:02:20,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:02:20,364 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-12-22 19:02:20,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:02:20,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:20,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:20,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 19:02:20,365 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:20,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:20,366 INFO L82 PathProgramCache]: Analyzing trace with hash -309239812, now seen corresponding path program 1 times [2020-12-22 19:02:20,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:20,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598979987] [2020-12-22 19:02:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:20,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598979987] [2020-12-22 19:02:20,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:20,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-22 19:02:20,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671890400] [2020-12-22 19:02:20,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 19:02:20,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:20,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 19:02:20,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:02:20,579 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 13 states. [2020-12-22 19:02:21,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:21,176 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2020-12-22 19:02:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:02:21,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-12-22 19:02:21,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:21,180 INFO L225 Difference]: With dead ends: 112 [2020-12-22 19:02:21,180 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 19:02:21,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:02:21,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 19:02:21,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-12-22 19:02:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 19:02:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2020-12-22 19:02:21,190 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 21 [2020-12-22 19:02:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:21,190 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2020-12-22 19:02:21,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 19:02:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2020-12-22 19:02:21,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:02:21,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:21,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:21,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 19:02:21,191 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:21,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:21,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1998183554, now seen corresponding path program 1 times [2020-12-22 19:02:21,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:21,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950187000] [2020-12-22 19:02:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:21,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950187000] [2020-12-22 19:02:21,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:21,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-12-22 19:02:21,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2777385] [2020-12-22 19:02:21,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 19:02:21,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:21,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 19:02:21,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:02:21,448 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 14 states. [2020-12-22 19:02:22,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:22,100 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2020-12-22 19:02:22,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 19:02:22,100 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2020-12-22 19:02:22,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:22,102 INFO L225 Difference]: With dead ends: 139 [2020-12-22 19:02:22,102 INFO L226 Difference]: Without dead ends: 139 [2020-12-22 19:02:22,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:02:22,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-22 19:02:22,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 83. [2020-12-22 19:02:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 19:02:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2020-12-22 19:02:22,107 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 21 [2020-12-22 19:02:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:22,107 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2020-12-22 19:02:22,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 19:02:22,107 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2020-12-22 19:02:22,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 19:02:22,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:22,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:22,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 19:02:22,109 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:22,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:22,109 INFO L82 PathProgramCache]: Analyzing trace with hash -826750037, now seen corresponding path program 1 times [2020-12-22 19:02:22,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:22,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917848302] [2020-12-22 19:02:22,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:22,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917848302] [2020-12-22 19:02:22,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:22,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 19:02:22,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785962571] [2020-12-22 19:02:22,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:02:22,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:22,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:02:22,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:02:22,229 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand 7 states. [2020-12-22 19:02:22,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:22,382 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2020-12-22 19:02:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:02:22,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-12-22 19:02:22,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:22,384 INFO L225 Difference]: With dead ends: 95 [2020-12-22 19:02:22,384 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 19:02:22,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:02:22,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 19:02:22,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-12-22 19:02:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 19:02:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2020-12-22 19:02:22,389 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 23 [2020-12-22 19:02:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:22,390 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2020-12-22 19:02:22,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:02:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2020-12-22 19:02:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 19:02:22,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:22,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:22,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 19:02:22,391 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:22,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:22,392 INFO L82 PathProgramCache]: Analyzing trace with hash -404048211, now seen corresponding path program 1 times [2020-12-22 19:02:22,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:22,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210532505] [2020-12-22 19:02:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:22,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210532505] [2020-12-22 19:02:22,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:22,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 19:02:22,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902693925] [2020-12-22 19:02:22,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:02:22,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:22,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:02:22,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:02:22,566 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 8 states. [2020-12-22 19:02:22,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:22,696 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2020-12-22 19:02:22,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:02:22,696 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-12-22 19:02:22,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:22,697 INFO L225 Difference]: With dead ends: 77 [2020-12-22 19:02:22,697 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 19:02:22,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:02:22,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 19:02:22,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2020-12-22 19:02:22,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 19:02:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-12-22 19:02:22,699 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2020-12-22 19:02:22,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:22,700 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-12-22 19:02:22,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:02:22,700 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-12-22 19:02:22,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 19:02:22,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:22,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:22,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 19:02:22,701 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:22,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:22,701 INFO L82 PathProgramCache]: Analyzing trace with hash -481506431, now seen corresponding path program 1 times [2020-12-22 19:02:22,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:22,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589845265] [2020-12-22 19:02:22,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:22,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589845265] [2020-12-22 19:02:22,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:22,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 19:02:22,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469912085] [2020-12-22 19:02:22,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:02:22,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:22,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:02:22,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:02:22,859 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 9 states. [2020-12-22 19:02:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:23,037 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-12-22 19:02:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:02:23,037 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-12-22 19:02:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:23,038 INFO L225 Difference]: With dead ends: 67 [2020-12-22 19:02:23,038 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 19:02:23,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:02:23,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 19:02:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 19:02:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 19:02:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-12-22 19:02:23,041 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 25 [2020-12-22 19:02:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:23,041 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-12-22 19:02:23,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:02:23,041 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-12-22 19:02:23,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 19:02:23,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:23,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:23,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 19:02:23,042 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:23,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:23,043 INFO L82 PathProgramCache]: Analyzing trace with hash -262651713, now seen corresponding path program 1 times [2020-12-22 19:02:23,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:23,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508192339] [2020-12-22 19:02:23,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:23,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508192339] [2020-12-22 19:02:23,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:02:23,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 19:02:23,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884950125] [2020-12-22 19:02:23,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 19:02:23,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:23,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 19:02:23,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:02:23,220 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 11 states. [2020-12-22 19:02:23,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:23,462 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-12-22 19:02:23,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:02:23,463 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-12-22 19:02:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:23,463 INFO L225 Difference]: With dead ends: 63 [2020-12-22 19:02:23,464 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 19:02:23,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-12-22 19:02:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 19:02:23,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-12-22 19:02:23,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 19:02:23,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-12-22 19:02:23,467 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 25 [2020-12-22 19:02:23,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:23,467 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-12-22 19:02:23,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 19:02:23,467 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-12-22 19:02:23,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 19:02:23,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:23,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:23,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 19:02:23,468 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:23,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:23,469 INFO L82 PathProgramCache]: Analyzing trace with hash 838689666, now seen corresponding path program 1 times [2020-12-22 19:02:23,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:23,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564883271] [2020-12-22 19:02:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:23,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564883271] [2020-12-22 19:02:23,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817760151] [2020-12-22 19:02:23,583 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 [2020-12-22 19:02:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:23,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:02:23,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:23,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:23,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-12-22 19:02:23,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111317781] [2020-12-22 19:02:23,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 19:02:23,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:23,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 19:02:23,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:02:23,872 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 16 states. [2020-12-22 19:02:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:24,126 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2020-12-22 19:02:24,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:02:24,126 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-12-22 19:02:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:24,127 INFO L225 Difference]: With dead ends: 75 [2020-12-22 19:02:24,127 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 19:02:24,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:02:24,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 19:02:24,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2020-12-22 19:02:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 19:02:24,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-12-22 19:02:24,130 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 29 [2020-12-22 19:02:24,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:24,130 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-12-22 19:02:24,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 19:02:24,130 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-12-22 19:02:24,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 19:02:24,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:24,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:24,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 19:02:24,341 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:24,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:24,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1473116751, now seen corresponding path program 1 times [2020-12-22 19:02:24,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:24,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384582494] [2020-12-22 19:02:24,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:24,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384582494] [2020-12-22 19:02:24,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672619261] [2020-12-22 19:02:24,463 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 [2020-12-22 19:02:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:24,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 19:02:24,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:24,562 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_24|], 1=[|v_#valid_31|]} [2020-12-22 19:02:24,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:02:24,568 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:02:24,569 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:24,579 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:24,586 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:02:24,592 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:24,602 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:24,606 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:24,607 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:02:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:24,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:24,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-22 19:02:24,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859733878] [2020-12-22 19:02:24,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 19:02:24,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:24,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 19:02:24,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:02:24,744 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 12 states. [2020-12-22 19:02:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:25,025 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2020-12-22 19:02:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:02:25,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-12-22 19:02:25,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:25,026 INFO L225 Difference]: With dead ends: 119 [2020-12-22 19:02:25,026 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 19:02:25,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:02:25,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 19:02:25,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 79. [2020-12-22 19:02:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 19:02:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2020-12-22 19:02:25,030 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 31 [2020-12-22 19:02:25,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:25,030 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2020-12-22 19:02:25,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 19:02:25,030 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2020-12-22 19:02:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 19:02:25,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:25,031 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:25,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:25,245 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:25,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:25,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1707334280, now seen corresponding path program 1 times [2020-12-22 19:02:25,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:25,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134428092] [2020-12-22 19:02:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:25,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134428092] [2020-12-22 19:02:25,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249797003] [2020-12-22 19:02:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:25,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 19:02:25,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:25,466 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_25|], 1=[|v_#valid_32|]} [2020-12-22 19:02:25,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:02:25,473 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:02:25,475 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:25,486 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:25,495 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:02:25,498 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:25,511 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:25,522 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:25,527 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:02:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:25,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:25,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-12-22 19:02:25,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037762530] [2020-12-22 19:02:25,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 19:02:25,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:25,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 19:02:25,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:02:25,704 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 14 states. [2020-12-22 19:02:26,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:26,182 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2020-12-22 19:02:26,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:02:26,182 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-12-22 19:02:26,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:26,183 INFO L225 Difference]: With dead ends: 95 [2020-12-22 19:02:26,183 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 19:02:26,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:02:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 19:02:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2020-12-22 19:02:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 19:02:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2020-12-22 19:02:26,186 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 33 [2020-12-22 19:02:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:26,187 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2020-12-22 19:02:26,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 19:02:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2020-12-22 19:02:26,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 19:02:26,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:26,187 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:26,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 19:02:26,401 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:26,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:26,402 INFO L82 PathProgramCache]: Analyzing trace with hash -2102124002, now seen corresponding path program 2 times [2020-12-22 19:02:26,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:26,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752684631] [2020-12-22 19:02:26,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:26,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752684631] [2020-12-22 19:02:26,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182317781] [2020-12-22 19:02:26,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 19:02:26,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:02:26,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:26,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 19:02:26,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:26,932 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:02:26,933 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:26,942 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:26,944 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:26,944 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-22 19:02:27,163 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 19:02:27,165 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:27,171 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:27,174 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:27,175 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:3 [2020-12-22 19:02:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:27,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:27,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2020-12-22 19:02:27,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343920047] [2020-12-22 19:02:27,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:02:27,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:27,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:02:27,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:02:27,229 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand 23 states. [2020-12-22 19:02:27,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:27,967 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2020-12-22 19:02:27,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:02:27,968 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 36 [2020-12-22 19:02:27,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:27,971 INFO L225 Difference]: With dead ends: 120 [2020-12-22 19:02:27,971 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 19:02:27,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:02:27,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 19:02:27,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2020-12-22 19:02:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-22 19:02:27,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-12-22 19:02:27,995 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 36 [2020-12-22 19:02:27,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:27,995 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-12-22 19:02:27,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:02:27,996 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-12-22 19:02:27,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 19:02:27,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:27,997 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:28,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 19:02:28,212 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:28,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1563569052, now seen corresponding path program 1 times [2020-12-22 19:02:28,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:28,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136464246] [2020-12-22 19:02:28,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:28,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136464246] [2020-12-22 19:02:28,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65150803] [2020-12-22 19:02:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:28,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 19:02:28,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:28,440 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_26|], 1=[|v_#valid_33|]} [2020-12-22 19:02:28,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:02:28,445 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:02:28,446 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:28,456 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:28,461 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:02:28,463 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:28,472 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:28,474 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:28,474 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:02:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:28,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:28,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-12-22 19:02:28,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983388286] [2020-12-22 19:02:28,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 19:02:28,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:28,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 19:02:28,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:02:28,625 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 14 states. [2020-12-22 19:02:29,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:29,044 INFO L93 Difference]: Finished difference Result 166 states and 187 transitions. [2020-12-22 19:02:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:02:29,045 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-12-22 19:02:29,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:29,046 INFO L225 Difference]: With dead ends: 166 [2020-12-22 19:02:29,046 INFO L226 Difference]: Without dead ends: 166 [2020-12-22 19:02:29,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:02:29,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-22 19:02:29,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 121. [2020-12-22 19:02:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-22 19:02:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2020-12-22 19:02:29,051 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 37 [2020-12-22 19:02:29,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:29,052 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2020-12-22 19:02:29,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 19:02:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2020-12-22 19:02:29,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 19:02:29,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:29,052 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:29,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:29,266 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:29,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:29,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1405700229, now seen corresponding path program 3 times [2020-12-22 19:02:29,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:29,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224781816] [2020-12-22 19:02:29,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:29,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224781816] [2020-12-22 19:02:29,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782609029] [2020-12-22 19:02:29,423 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 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 [2020-12-22 19:02:29,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 19:02:29,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:29,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 19:02:29,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:29,556 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:29,557 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:02:29,559 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:29,576 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:02:29,579 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:29,579 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:02:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:29,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:29,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2020-12-22 19:02:29,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538825399] [2020-12-22 19:02:29,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 19:02:29,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:29,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 19:02:29,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:02:29,809 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 20 states. [2020-12-22 19:02:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:30,405 INFO L93 Difference]: Finished difference Result 167 states and 186 transitions. [2020-12-22 19:02:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:02:30,406 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-12-22 19:02:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:30,407 INFO L225 Difference]: With dead ends: 167 [2020-12-22 19:02:30,407 INFO L226 Difference]: Without dead ends: 165 [2020-12-22 19:02:30,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:02:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-22 19:02:30,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 135. [2020-12-22 19:02:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-22 19:02:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 158 transitions. [2020-12-22 19:02:30,412 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 158 transitions. Word has length 40 [2020-12-22 19:02:30,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:30,413 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 158 transitions. [2020-12-22 19:02:30,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 19:02:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 158 transitions. [2020-12-22 19:02:30,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 19:02:30,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:30,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:30,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 19:02:30,628 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:30,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:30,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2117126329, now seen corresponding path program 2 times [2020-12-22 19:02:30,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:30,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939552375] [2020-12-22 19:02:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:30,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939552375] [2020-12-22 19:02:30,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316561294] [2020-12-22 19:02:30,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:30,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:02:30,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:30,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 19:02:30,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:30,983 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:02:30,984 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:30,988 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:30,989 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:30,989 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:02:31,082 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:02:31,083 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:31,091 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:31,092 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:31,093 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:02:31,141 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-22 19:02:31,143 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:31,153 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:31,159 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:31,159 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 19:02:31,401 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:31,402 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-22 19:02:31,404 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:02:31,419 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-22 19:02:31,421 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:31,421 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:3 [2020-12-22 19:02:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:31,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:31,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2020-12-22 19:02:31,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862215549] [2020-12-22 19:02:31,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 19:02:31,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:31,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 19:02:31,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:02:31,463 INFO L87 Difference]: Start difference. First operand 135 states and 158 transitions. Second operand 19 states. [2020-12-22 19:02:32,205 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-12-22 19:02:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:32,227 INFO L93 Difference]: Finished difference Result 212 states and 242 transitions. [2020-12-22 19:02:32,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:02:32,227 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-12-22 19:02:32,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:32,229 INFO L225 Difference]: With dead ends: 212 [2020-12-22 19:02:32,229 INFO L226 Difference]: Without dead ends: 192 [2020-12-22 19:02:32,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:02:32,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-22 19:02:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 182. [2020-12-22 19:02:32,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 19:02:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 213 transitions. [2020-12-22 19:02:32,235 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 213 transitions. Word has length 42 [2020-12-22 19:02:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:32,236 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 213 transitions. [2020-12-22 19:02:32,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 19:02:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 213 transitions. [2020-12-22 19:02:32,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 19:02:32,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:32,237 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:32,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:32,445 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:32,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:32,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1160738303, now seen corresponding path program 2 times [2020-12-22 19:02:32,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:32,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730759859] [2020-12-22 19:02:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:33,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730759859] [2020-12-22 19:02:33,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000168461] [2020-12-22 19:02:33,239 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 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 [2020-12-22 19:02:33,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:02:33,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:33,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 19:02:33,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:33,350 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:33,350 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:02:33,352 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:33,373 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:02:33,376 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:33,376 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:02:33,563 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 19:02:33,564 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:33,568 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:33,569 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:33,570 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-22 19:02:33,886 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2020-12-22 19:02:33,889 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:33,899 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:33,903 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:02:33,905 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:33,905 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2020-12-22 19:02:33,906 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:33,913 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:33,915 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:33,915 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2020-12-22 19:02:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:33,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:33,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 30 [2020-12-22 19:02:33,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357630747] [2020-12-22 19:02:33,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 19:02:33,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:33,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 19:02:33,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:02:33,928 INFO L87 Difference]: Start difference. First operand 182 states and 213 transitions. Second operand 30 states. [2020-12-22 19:02:34,415 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-12-22 19:02:35,615 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 19:02:36,349 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-12-22 19:02:36,728 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 19:02:36,888 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-12-22 19:02:37,076 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-22 19:02:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:37,778 INFO L93 Difference]: Finished difference Result 293 states and 321 transitions. [2020-12-22 19:02:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 19:02:37,778 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 44 [2020-12-22 19:02:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:37,781 INFO L225 Difference]: With dead ends: 293 [2020-12-22 19:02:37,781 INFO L226 Difference]: Without dead ends: 265 [2020-12-22 19:02:37,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=588, Invalid=3194, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 19:02:37,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-22 19:02:37,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 236. [2020-12-22 19:02:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-12-22 19:02:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 273 transitions. [2020-12-22 19:02:37,790 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 273 transitions. Word has length 44 [2020-12-22 19:02:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:37,790 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 273 transitions. [2020-12-22 19:02:37,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 19:02:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 273 transitions. [2020-12-22 19:02:37,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 19:02:37,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:37,791 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:38,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:38,005 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:38,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:38,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1310015382, now seen corresponding path program 3 times [2020-12-22 19:02:38,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:38,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268826857] [2020-12-22 19:02:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:38,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268826857] [2020-12-22 19:02:38,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855095744] [2020-12-22 19:02:38,131 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 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 [2020-12-22 19:02:38,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 19:02:38,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:38,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 19:02:38,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:38,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:38,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2020-12-22 19:02:38,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576580927] [2020-12-22 19:02:38,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 19:02:38,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:38,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 19:02:38,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-12-22 19:02:38,440 INFO L87 Difference]: Start difference. First operand 236 states and 273 transitions. Second operand 18 states. [2020-12-22 19:02:38,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:38,953 INFO L93 Difference]: Finished difference Result 375 states and 425 transitions. [2020-12-22 19:02:38,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:02:38,954 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-12-22 19:02:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:38,956 INFO L225 Difference]: With dead ends: 375 [2020-12-22 19:02:38,956 INFO L226 Difference]: Without dead ends: 375 [2020-12-22 19:02:38,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:02:38,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-12-22 19:02:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 280. [2020-12-22 19:02:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-12-22 19:02:38,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 330 transitions. [2020-12-22 19:02:38,965 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 330 transitions. Word has length 46 [2020-12-22 19:02:38,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:38,966 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 330 transitions. [2020-12-22 19:02:38,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 19:02:38,966 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 330 transitions. [2020-12-22 19:02:38,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 19:02:38,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:38,967 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:39,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 19:02:39,178 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:39,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:39,179 INFO L82 PathProgramCache]: Analyzing trace with hash -204836258, now seen corresponding path program 3 times [2020-12-22 19:02:39,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:39,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030208335] [2020-12-22 19:02:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:02:39,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030208335] [2020-12-22 19:02:39,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393374143] [2020-12-22 19:02:39,660 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 [2020-12-22 19:02:39,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 19:02:39,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:39,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 19:02:39,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:39,763 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:02:39,765 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:39,769 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:39,770 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:39,770 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:02:39,897 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:02:39,898 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:39,905 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:39,907 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:39,907 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:02:39,970 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-22 19:02:39,971 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:39,980 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:39,983 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:39,983 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 19:02:42,541 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 19:02:42,776 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:42,777 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 70 [2020-12-22 19:02:42,780 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:42,827 INFO L625 ElimStorePlain]: treesize reduction 21, result has 65.6 percent of original size [2020-12-22 19:02:42,832 INFO L547 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:42,832 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:53, output treesize:8 [2020-12-22 19:02:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:02:42,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:42,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2020-12-22 19:02:42,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660708507] [2020-12-22 19:02:42,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 19:02:42,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:42,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 19:02:42,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2020-12-22 19:02:42,931 INFO L87 Difference]: Start difference. First operand 280 states and 330 transitions. Second operand 31 states. [2020-12-22 19:02:44,427 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-12-22 19:02:44,632 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2020-12-22 19:02:44,844 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2020-12-22 19:02:45,053 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-12-22 19:02:45,257 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2020-12-22 19:02:45,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:45,301 INFO L93 Difference]: Finished difference Result 269 states and 312 transitions. [2020-12-22 19:02:45,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 19:02:45,302 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 48 [2020-12-22 19:02:45,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:45,303 INFO L225 Difference]: With dead ends: 269 [2020-12-22 19:02:45,304 INFO L226 Difference]: Without dead ends: 236 [2020-12-22 19:02:45,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=338, Invalid=1732, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:02:45,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-12-22 19:02:45,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2020-12-22 19:02:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-22 19:02:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 275 transitions. [2020-12-22 19:02:45,311 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 275 transitions. Word has length 48 [2020-12-22 19:02:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:45,311 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 275 transitions. [2020-12-22 19:02:45,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 19:02:45,311 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 275 transitions. [2020-12-22 19:02:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 19:02:45,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:45,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:45,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 19:02:45,526 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:45,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:45,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1643750849, now seen corresponding path program 2 times [2020-12-22 19:02:45,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:45,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505611941] [2020-12-22 19:02:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:02:45,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505611941] [2020-12-22 19:02:45,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704420287] [2020-12-22 19:02:45,699 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 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 [2020-12-22 19:02:45,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:02:45,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:45,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 19:02:45,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 19:02:45,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:02:45,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2020-12-22 19:02:45,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036054361] [2020-12-22 19:02:45,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:02:45,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:45,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:02:45,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:02:45,862 INFO L87 Difference]: Start difference. First operand 233 states and 275 transitions. Second operand 4 states. [2020-12-22 19:02:45,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:45,940 INFO L93 Difference]: Finished difference Result 234 states and 272 transitions. [2020-12-22 19:02:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:02:45,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-12-22 19:02:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:45,942 INFO L225 Difference]: With dead ends: 234 [2020-12-22 19:02:45,942 INFO L226 Difference]: Without dead ends: 234 [2020-12-22 19:02:45,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:02:45,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-22 19:02:45,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2020-12-22 19:02:45,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-22 19:02:45,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 272 transitions. [2020-12-22 19:02:45,948 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 272 transitions. Word has length 52 [2020-12-22 19:02:45,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:45,949 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 272 transitions. [2020-12-22 19:02:45,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:02:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 272 transitions. [2020-12-22 19:02:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 19:02:45,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:45,950 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:46,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 19:02:46,164 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:46,165 INFO L82 PathProgramCache]: Analyzing trace with hash 252510474, now seen corresponding path program 1 times [2020-12-22 19:02:46,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:46,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551581631] [2020-12-22 19:02:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:02:46,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551581631] [2020-12-22 19:02:46,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487215663] [2020-12-22 19:02:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 19:02:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:46,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 19:02:46,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:46,417 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_29|], 1=[|v_#valid_36|]} [2020-12-22 19:02:46,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:02:46,422 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:02:46,423 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:46,433 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:46,439 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:02:46,440 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:46,450 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:46,452 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:46,452 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:02:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:02:46,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:46,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 19:02:46,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667641498] [2020-12-22 19:02:46,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:02:46,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:46,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:02:46,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:02:46,667 INFO L87 Difference]: Start difference. First operand 233 states and 272 transitions. Second operand 17 states. [2020-12-22 19:02:47,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:47,291 INFO L93 Difference]: Finished difference Result 259 states and 288 transitions. [2020-12-22 19:02:47,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:02:47,292 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-12-22 19:02:47,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:47,293 INFO L225 Difference]: With dead ends: 259 [2020-12-22 19:02:47,293 INFO L226 Difference]: Without dead ends: 259 [2020-12-22 19:02:47,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:02:47,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-22 19:02:47,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 233. [2020-12-22 19:02:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-22 19:02:47,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 270 transitions. [2020-12-22 19:02:47,301 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 270 transitions. Word has length 52 [2020-12-22 19:02:47,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:47,301 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 270 transitions. [2020-12-22 19:02:47,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:02:47,301 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 270 transitions. [2020-12-22 19:02:47,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 19:02:47,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:47,302 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:47,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:47,516 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:47,517 INFO L82 PathProgramCache]: Analyzing trace with hash 314543995, now seen corresponding path program 4 times [2020-12-22 19:02:47,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:47,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625942075] [2020-12-22 19:02:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:02:47,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625942075] [2020-12-22 19:02:47,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250020741] [2020-12-22 19:02:47,655 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 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 [2020-12-22 19:02:47,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:02:47,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:47,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 19:02:47,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:47,745 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_30|], 1=[|v_#valid_37|]} [2020-12-22 19:02:47,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:02:47,750 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:02:47,751 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:47,761 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:47,768 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:02:47,770 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:47,780 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:47,780 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:47,781 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-12-22 19:02:47,918 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 19:02:47,919 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:47,930 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:47,931 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:47,931 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2020-12-22 19:02:47,982 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2020-12-22 19:02:47,983 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:47,996 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:47,999 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:47,999 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:39 [2020-12-22 19:02:50,525 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 38 [2020-12-22 19:02:50,746 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:50,747 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 74 [2020-12-22 19:02:50,752 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:50,844 INFO L625 ElimStorePlain]: treesize reduction 7, result has 91.1 percent of original size [2020-12-22 19:02:50,849 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 19:02:50,857 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:50,858 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:68, output treesize:28 [2020-12-22 19:02:50,922 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:50,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:50,925 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:50,928 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:50,930 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:02:51,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:51,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 25 [2020-12-22 19:02:51,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316488530] [2020-12-22 19:02:51,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 19:02:51,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:51,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 19:02:51,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:02:51,080 INFO L87 Difference]: Start difference. First operand 233 states and 270 transitions. Second operand 26 states. [2020-12-22 19:02:52,026 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-12-22 19:02:52,534 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 19:02:52,751 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-12-22 19:02:53,171 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-12-22 19:02:53,518 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-12-22 19:02:53,849 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2020-12-22 19:02:54,191 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2020-12-22 19:02:54,488 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-12-22 19:02:54,853 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-12-22 19:02:55,059 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 19:02:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:55,473 INFO L93 Difference]: Finished difference Result 254 states and 286 transitions. [2020-12-22 19:02:55,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:02:55,474 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 52 [2020-12-22 19:02:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:55,476 INFO L225 Difference]: With dead ends: 254 [2020-12-22 19:02:55,476 INFO L226 Difference]: Without dead ends: 254 [2020-12-22 19:02:55,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 19:02:55,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-22 19:02:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 233. [2020-12-22 19:02:55,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-22 19:02:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 269 transitions. [2020-12-22 19:02:55,493 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 269 transitions. Word has length 52 [2020-12-22 19:02:55,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:55,494 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 269 transitions. [2020-12-22 19:02:55,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 19:02:55,494 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 269 transitions. [2020-12-22 19:02:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 19:02:55,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:55,495 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:55,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 19:02:55,710 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:55,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:55,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1038457781, now seen corresponding path program 4 times [2020-12-22 19:02:55,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:55,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566340588] [2020-12-22 19:02:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:02:55,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566340588] [2020-12-22 19:02:55,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716574129] [2020-12-22 19:02:55,910 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 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 [2020-12-22 19:02:55,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:02:55,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:56,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 19:02:56,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:56,026 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:56,026 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:02:56,027 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:56,046 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:02:56,049 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:56,049 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:02:56,136 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 19:02:56,137 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:56,146 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:56,147 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:56,147 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-22 19:02:56,385 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:56,385 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-22 19:02:56,387 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:02:56,400 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:56,401 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:56,401 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-22 19:02:56,457 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:56,458 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:02:56,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:56,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 24 [2020-12-22 19:02:56,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377474512] [2020-12-22 19:02:56,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 19:02:56,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:56,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 19:02:56,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:02:56,610 INFO L87 Difference]: Start difference. First operand 233 states and 269 transitions. Second operand 25 states. [2020-12-22 19:02:58,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:58,795 INFO L93 Difference]: Finished difference Result 319 states and 357 transitions. [2020-12-22 19:02:58,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 19:02:58,796 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-12-22 19:02:58,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:58,799 INFO L225 Difference]: With dead ends: 319 [2020-12-22 19:02:58,799 INFO L226 Difference]: Without dead ends: 317 [2020-12-22 19:02:58,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 19:02:58,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-12-22 19:02:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 254. [2020-12-22 19:02:58,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-12-22 19:02:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 296 transitions. [2020-12-22 19:02:58,809 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 296 transitions. Word has length 55 [2020-12-22 19:02:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:58,809 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 296 transitions. [2020-12-22 19:02:58,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 19:02:58,809 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 296 transitions. [2020-12-22 19:02:58,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 19:02:58,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:58,810 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:59,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 19:02:59,024 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:59,024 INFO L82 PathProgramCache]: Analyzing trace with hash -869737036, now seen corresponding path program 4 times [2020-12-22 19:02:59,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:59,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740569382] [2020-12-22 19:02:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:59,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740569382] [2020-12-22 19:02:59,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007005037] [2020-12-22 19:02:59,775 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 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 [2020-12-22 19:02:59,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:02:59,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:59,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 19:02:59,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:59,879 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_32|], 1=[|v_#valid_38|]} [2020-12-22 19:02:59,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:02:59,884 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:02:59,885 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:59,897 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:59,902 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:02:59,907 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:59,917 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:59,918 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:59,918 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-12-22 19:03:00,138 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 19:03:00,139 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:00,149 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:00,150 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:00,150 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-22 19:03:00,207 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2020-12-22 19:03:00,209 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:00,220 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:00,221 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:00,222 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2020-12-22 19:03:00,583 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2020-12-22 19:03:00,587 INFO L547 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:00,607 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:00,620 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:00,620 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:42 [2020-12-22 19:03:00,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:03:00,999 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:01,000 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2020-12-22 19:03:01,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:03:01,008 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:01,037 INFO L625 ElimStorePlain]: treesize reduction 7, result has 75.0 percent of original size [2020-12-22 19:03:01,039 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:01,040 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:13 [2020-12-22 19:03:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:03:01,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:01,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2020-12-22 19:03:01,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003930059] [2020-12-22 19:03:01,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 19:03:01,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:01,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 19:03:01,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:03:01,124 INFO L87 Difference]: Start difference. First operand 254 states and 296 transitions. Second operand 30 states. [2020-12-22 19:03:02,754 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-12-22 19:03:03,468 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-12-22 19:03:05,815 WARN L197 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-12-22 19:03:06,080 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-12-22 19:03:08,326 WARN L197 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2020-12-22 19:03:08,710 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-12-22 19:03:10,975 WARN L197 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-12-22 19:03:11,431 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-12-22 19:03:13,718 WARN L197 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-12-22 19:03:15,753 WARN L197 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2020-12-22 19:03:16,080 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-12-22 19:03:16,574 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-12-22 19:03:16,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:16,802 INFO L93 Difference]: Finished difference Result 440 states and 500 transitions. [2020-12-22 19:03:16,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 19:03:16,803 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 57 [2020-12-22 19:03:16,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:16,806 INFO L225 Difference]: With dead ends: 440 [2020-12-22 19:03:16,806 INFO L226 Difference]: Without dead ends: 368 [2020-12-22 19:03:16,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=542, Invalid=2538, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 19:03:16,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-12-22 19:03:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 352. [2020-12-22 19:03:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-12-22 19:03:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 414 transitions. [2020-12-22 19:03:16,817 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 414 transitions. Word has length 57 [2020-12-22 19:03:16,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:16,817 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 414 transitions. [2020-12-22 19:03:16,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 19:03:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 414 transitions. [2020-12-22 19:03:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 19:03:16,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:16,818 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:17,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 19:03:17,034 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:17,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:17,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1435414831, now seen corresponding path program 5 times [2020-12-22 19:03:17,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:17,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332885014] [2020-12-22 19:03:17,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:03:17,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332885014] [2020-12-22 19:03:17,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701964904] [2020-12-22 19:03:17,778 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 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 [2020-12-22 19:03:17,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 19:03:17,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:17,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 19:03:17,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:18,121 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:03:18,122 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:18,131 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:18,132 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:18,133 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:03:18,716 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:18,716 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-12-22 19:03:18,718 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:03:18,733 INFO L625 ElimStorePlain]: treesize reduction 5, result has 66.7 percent of original size [2020-12-22 19:03:18,735 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:18,735 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:24, output treesize:3 [2020-12-22 19:03:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:03:18,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:18,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2020-12-22 19:03:18,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316501872] [2020-12-22 19:03:18,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 19:03:18,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:18,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 19:03:18,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1045, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:03:18,809 INFO L87 Difference]: Start difference. First operand 352 states and 414 transitions. Second operand 34 states. [2020-12-22 19:03:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:26,077 INFO L93 Difference]: Finished difference Result 549 states and 605 transitions. [2020-12-22 19:03:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 19:03:26,078 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 59 [2020-12-22 19:03:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:26,082 INFO L225 Difference]: With dead ends: 549 [2020-12-22 19:03:26,082 INFO L226 Difference]: Without dead ends: 535 [2020-12-22 19:03:26,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1023, Invalid=6809, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 19:03:26,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-12-22 19:03:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 473. [2020-12-22 19:03:26,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2020-12-22 19:03:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 540 transitions. [2020-12-22 19:03:26,096 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 540 transitions. Word has length 59 [2020-12-22 19:03:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:26,096 INFO L481 AbstractCegarLoop]: Abstraction has 473 states and 540 transitions. [2020-12-22 19:03:26,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 19:03:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 540 transitions. [2020-12-22 19:03:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 19:03:26,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:26,097 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:26,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 19:03:26,312 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:26,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:26,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1359597257, now seen corresponding path program 5 times [2020-12-22 19:03:26,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:26,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475728606] [2020-12-22 19:03:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:03:26,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475728606] [2020-12-22 19:03:26,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241496358] [2020-12-22 19:03:26,477 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 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 [2020-12-22 19:03:26,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 19:03:26,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:26,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 19:03:26,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:03:26,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:26,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-12-22 19:03:26,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516084697] [2020-12-22 19:03:26,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:03:26,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:26,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:03:26,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:03:26,849 INFO L87 Difference]: Start difference. First operand 473 states and 540 transitions. Second operand 17 states. [2020-12-22 19:03:27,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:27,422 INFO L93 Difference]: Finished difference Result 687 states and 772 transitions. [2020-12-22 19:03:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:03:27,424 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-12-22 19:03:27,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:27,429 INFO L225 Difference]: With dead ends: 687 [2020-12-22 19:03:27,429 INFO L226 Difference]: Without dead ends: 687 [2020-12-22 19:03:27,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:03:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2020-12-22 19:03:27,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 567. [2020-12-22 19:03:27,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-12-22 19:03:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 653 transitions. [2020-12-22 19:03:27,443 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 653 transitions. Word has length 61 [2020-12-22 19:03:27,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:27,443 INFO L481 AbstractCegarLoop]: Abstraction has 567 states and 653 transitions. [2020-12-22 19:03:27,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:03:27,443 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 653 transitions. [2020-12-22 19:03:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 19:03:27,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:27,445 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:27,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:03:27,661 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:27,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1901256603, now seen corresponding path program 2 times [2020-12-22 19:03:27,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:27,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149147228] [2020-12-22 19:03:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:03:28,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149147228] [2020-12-22 19:03:28,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451085374] [2020-12-22 19:03:28,243 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 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 [2020-12-22 19:03:28,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:03:28,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:28,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 19:03:28,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:28,364 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_33|], 1=[|v_#valid_39|]} [2020-12-22 19:03:28,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:03:28,370 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:03:28,371 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:28,382 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:28,389 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:03:28,391 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:28,417 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:28,418 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:28,418 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-12-22 19:03:28,599 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 19:03:28,600 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:28,611 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:28,612 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:28,612 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-22 19:03:28,681 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2020-12-22 19:03:28,683 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:28,694 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:28,696 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:28,696 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:37 [2020-12-22 19:03:31,432 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 36 [2020-12-22 19:03:31,714 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:31,715 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 74 [2020-12-22 19:03:31,718 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:31,758 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:31,762 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 19:03:31,767 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:31,767 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:25 [2020-12-22 19:03:31,864 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:03:31,865 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:03:31,867 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:03:31,868 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:03:31,869 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:03:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:03:32,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:32,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 37 [2020-12-22 19:03:32,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075994633] [2020-12-22 19:03:32,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 19:03:32,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:32,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 19:03:32,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 19:03:32,077 INFO L87 Difference]: Start difference. First operand 567 states and 653 transitions. Second operand 37 states. [2020-12-22 19:03:34,678 WARN L197 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 19:03:35,294 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 19:03:35,563 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-12-22 19:03:40,106 WARN L197 SmtUtils]: Spent 4.44 s on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-22 19:03:45,242 WARN L197 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-12-22 19:03:47,614 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 19:03:51,893 WARN L197 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-12-22 19:03:53,032 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-22 19:03:59,487 WARN L197 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-12-22 19:04:00,842 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-22 19:04:05,202 WARN L197 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2020-12-22 19:04:06,205 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-12-22 19:04:10,620 WARN L197 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2020-12-22 19:04:13,078 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-12-22 19:04:17,519 WARN L197 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 108 DAG size of output: 81 [2020-12-22 19:04:18,300 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-12-22 19:04:25,917 WARN L197 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2020-12-22 19:04:26,597 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2020-12-22 19:04:29,177 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-22 19:04:30,144 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-12-22 19:04:30,451 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 19:04:31,354 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 19:04:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:31,582 INFO L93 Difference]: Finished difference Result 580 states and 647 transitions. [2020-12-22 19:04:31,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 19:04:31,582 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 63 [2020-12-22 19:04:31,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:31,584 INFO L225 Difference]: With dead ends: 580 [2020-12-22 19:04:31,585 INFO L226 Difference]: Without dead ends: 474 [2020-12-22 19:04:31,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 56.9s TimeCoverageRelationStatistics Valid=786, Invalid=5218, Unknown=2, NotChecked=0, Total=6006 [2020-12-22 19:04:31,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-12-22 19:04:31,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 435. [2020-12-22 19:04:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-12-22 19:04:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 505 transitions. [2020-12-22 19:04:31,596 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 505 transitions. Word has length 63 [2020-12-22 19:04:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:31,596 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 505 transitions. [2020-12-22 19:04:31,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 19:04:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 505 transitions. [2020-12-22 19:04:31,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 19:04:31,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:31,598 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:31,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 19:04:31,813 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:31,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:31,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1762293009, now seen corresponding path program 3 times [2020-12-22 19:04:31,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:31,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512837368] [2020-12-22 19:04:31,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:04:32,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512837368] [2020-12-22 19:04:32,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171196295] [2020-12-22 19:04:32,040 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 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 [2020-12-22 19:04:32,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 19:04:32,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:32,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-22 19:04:32,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:32,190 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_34|], 1=[|v_#valid_40|]} [2020-12-22 19:04:32,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:04:32,197 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:04:32,198 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:32,211 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:32,217 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:04:32,219 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:32,235 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:32,236 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:32,236 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-12-22 19:04:32,460 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 19:04:32,461 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:32,476 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:32,477 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:32,477 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-22 19:04:32,527 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2020-12-22 19:04:32,528 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:32,541 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:32,542 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:32,543 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2020-12-22 19:04:33,361 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:33,362 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2020-12-22 19:04:33,364 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:33,383 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:33,384 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:04:33,385 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:37 [2020-12-22 19:04:33,490 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:04:33,491 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:04:33,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:04:33,495 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:04:33,496 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:04:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 19:04:33,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:33,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20] total 30 [2020-12-22 19:04:33,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400800391] [2020-12-22 19:04:33,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 19:04:33,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:33,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 19:04:33,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2020-12-22 19:04:33,804 INFO L87 Difference]: Start difference. First operand 435 states and 505 transitions. Second operand 31 states. [2020-12-22 19:04:35,009 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-22 19:04:35,327 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 19:04:35,553 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-12-22 19:04:35,782 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-12-22 19:04:36,042 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 19:04:36,287 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-12-22 19:04:36,545 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-12-22 19:04:36,752 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-12-22 19:04:36,956 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-12-22 19:04:37,289 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2020-12-22 19:04:37,498 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-12-22 19:04:37,893 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 90 [2020-12-22 19:04:38,168 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 19:04:38,430 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-12-22 19:04:38,697 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 19:04:38,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:38,993 INFO L93 Difference]: Finished difference Result 481 states and 536 transitions. [2020-12-22 19:04:38,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 19:04:38,994 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2020-12-22 19:04:38,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:38,997 INFO L225 Difference]: With dead ends: 481 [2020-12-22 19:04:38,997 INFO L226 Difference]: Without dead ends: 481 [2020-12-22 19:04:38,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=476, Invalid=2604, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 19:04:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-12-22 19:04:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 435. [2020-12-22 19:04:39,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-12-22 19:04:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 502 transitions. [2020-12-22 19:04:39,007 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 502 transitions. Word has length 67 [2020-12-22 19:04:39,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:39,007 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 502 transitions. [2020-12-22 19:04:39,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 19:04:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 502 transitions. [2020-12-22 19:04:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 19:04:39,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:39,009 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:39,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 19:04:39,224 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:39,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1407777257, now seen corresponding path program 6 times [2020-12-22 19:04:39,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:39,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021427798] [2020-12-22 19:04:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:04:39,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021427798] [2020-12-22 19:04:39,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115516286] [2020-12-22 19:04:39,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:39,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 19:04:39,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:39,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 19:04:39,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:04:39,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:39,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2020-12-22 19:04:39,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718012043] [2020-12-22 19:04:39,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:04:39,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:39,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:04:39,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:04:39,963 INFO L87 Difference]: Start difference. First operand 435 states and 502 transitions. Second operand 23 states. [2020-12-22 19:04:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:40,916 INFO L93 Difference]: Finished difference Result 468 states and 530 transitions. [2020-12-22 19:04:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:04:40,916 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-12-22 19:04:40,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:40,918 INFO L225 Difference]: With dead ends: 468 [2020-12-22 19:04:40,918 INFO L226 Difference]: Without dead ends: 468 [2020-12-22 19:04:40,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:04:40,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-12-22 19:04:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 435. [2020-12-22 19:04:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-12-22 19:04:40,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 501 transitions. [2020-12-22 19:04:40,925 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 501 transitions. Word has length 67 [2020-12-22 19:04:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:40,926 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 501 transitions. [2020-12-22 19:04:40,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:04:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 501 transitions. [2020-12-22 19:04:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 19:04:40,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:40,927 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:41,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:41,141 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:41,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:41,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1263409199, now seen corresponding path program 5 times [2020-12-22 19:04:41,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:41,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005106856] [2020-12-22 19:04:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:04:41,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005106856] [2020-12-22 19:04:41,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981660732] [2020-12-22 19:04:41,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:41,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 19:04:41,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:41,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 19:04:41,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:41,623 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:41,623 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:04:41,625 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:41,646 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:04:41,648 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:41,649 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:04:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:04:41,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:41,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2020-12-22 19:04:41,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95435014] [2020-12-22 19:04:41,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 19:04:41,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:41,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 19:04:41,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:04:41,902 INFO L87 Difference]: Start difference. First operand 435 states and 501 transitions. Second operand 20 states. [2020-12-22 19:04:43,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:43,063 INFO L93 Difference]: Finished difference Result 550 states and 618 transitions. [2020-12-22 19:04:43,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:04:43,064 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 70 [2020-12-22 19:04:43,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:43,067 INFO L225 Difference]: With dead ends: 550 [2020-12-22 19:04:43,067 INFO L226 Difference]: Without dead ends: 548 [2020-12-22 19:04:43,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:04:43,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-12-22 19:04:43,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 463. [2020-12-22 19:04:43,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2020-12-22 19:04:43,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 537 transitions. [2020-12-22 19:04:43,078 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 537 transitions. Word has length 70 [2020-12-22 19:04:43,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:43,078 INFO L481 AbstractCegarLoop]: Abstraction has 463 states and 537 transitions. [2020-12-22 19:04:43,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 19:04:43,078 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 537 transitions. [2020-12-22 19:04:43,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 19:04:43,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:43,080 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:43,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 19:04:43,294 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:43,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:43,295 INFO L82 PathProgramCache]: Analyzing trace with hash 850414963, now seen corresponding path program 6 times [2020-12-22 19:04:43,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:43,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565637153] [2020-12-22 19:04:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:43,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565637153] [2020-12-22 19:04:43,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648839198] [2020-12-22 19:04:43,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:43,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 19:04:43,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:43,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 19:04:43,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:43,753 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:04:43,755 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:43,761 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:43,762 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:43,762 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:04:44,001 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:04:44,004 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:44,014 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:44,016 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:04:44,016 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:04:44,084 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-22 19:04:44,086 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:44,100 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:44,102 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 19:04:44,103 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 19:04:44,870 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:44,871 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-22 19:04:44,873 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:04:44,893 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-22 19:04:44,896 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:44,896 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:38, output treesize:3 [2020-12-22 19:04:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:44,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:44,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2020-12-22 19:04:44,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527325346] [2020-12-22 19:04:44,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 19:04:44,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:44,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 19:04:44,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:04:44,935 INFO L87 Difference]: Start difference. First operand 463 states and 537 transitions. Second operand 26 states. [2020-12-22 19:04:48,234 WARN L197 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:52,532 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:56,822 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:05:00,958 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 19:05:00,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:00,974 INFO L93 Difference]: Finished difference Result 829 states and 941 transitions. [2020-12-22 19:05:00,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:05:00,975 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-12-22 19:05:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:00,977 INFO L225 Difference]: With dead ends: 829 [2020-12-22 19:05:00,977 INFO L226 Difference]: Without dead ends: 722 [2020-12-22 19:05:00,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:05:00,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2020-12-22 19:05:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 700. [2020-12-22 19:05:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2020-12-22 19:05:00,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 814 transitions. [2020-12-22 19:05:00,989 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 814 transitions. Word has length 72 [2020-12-22 19:05:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:00,990 INFO L481 AbstractCegarLoop]: Abstraction has 700 states and 814 transitions. [2020-12-22 19:05:00,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 19:05:00,990 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 814 transitions. [2020-12-22 19:05:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 19:05:00,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:00,992 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:01,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:01,194 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:01,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1226862773, now seen corresponding path program 7 times [2020-12-22 19:05:01,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:01,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343547225] [2020-12-22 19:05:01,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 20 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:02,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343547225] [2020-12-22 19:05:02,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870506330] [2020-12-22 19:05:02,087 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 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 [2020-12-22 19:05:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:02,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 19:05:02,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:02,556 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:05:02,557 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:02,564 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:02,565 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:02,565 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:05:03,550 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:03,550 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-12-22 19:05:03,553 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:05:03,570 INFO L625 ElimStorePlain]: treesize reduction 5, result has 66.7 percent of original size [2020-12-22 19:05:03,572 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:03,573 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:24, output treesize:3 [2020-12-22 19:05:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 82 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:05:03,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:03,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 39 [2020-12-22 19:05:03,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287037286] [2020-12-22 19:05:03,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 19:05:03,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:03,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 19:05:03,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1393, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 19:05:03,655 INFO L87 Difference]: Start difference. First operand 700 states and 814 transitions. Second operand 39 states. [2020-12-22 19:05:16,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:16,349 INFO L93 Difference]: Finished difference Result 1059 states and 1177 transitions. [2020-12-22 19:05:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-22 19:05:16,350 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 74 [2020-12-22 19:05:16,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:16,355 INFO L225 Difference]: With dead ends: 1059 [2020-12-22 19:05:16,355 INFO L226 Difference]: Without dead ends: 1039 [2020-12-22 19:05:16,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1258, Invalid=10514, Unknown=0, NotChecked=0, Total=11772 [2020-12-22 19:05:16,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2020-12-22 19:05:16,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 913. [2020-12-22 19:05:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2020-12-22 19:05:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1047 transitions. [2020-12-22 19:05:16,375 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1047 transitions. Word has length 74 [2020-12-22 19:05:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:16,375 INFO L481 AbstractCegarLoop]: Abstraction has 913 states and 1047 transitions. [2020-12-22 19:05:16,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 19:05:16,375 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1047 transitions. [2020-12-22 19:05:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 19:05:16,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:16,377 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:16,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 19:05:16,591 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:16,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1960256400, now seen corresponding path program 7 times [2020-12-22 19:05:16,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:16,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905284334] [2020-12-22 19:05:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:05:16,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905284334] [2020-12-22 19:05:16,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686660454] [2020-12-22 19:05:16,833 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 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 [2020-12-22 19:05:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:16,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 19:05:16,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:05:17,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:17,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2020-12-22 19:05:17,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204128743] [2020-12-22 19:05:17,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 19:05:17,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:17,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 19:05:17,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:05:17,256 INFO L87 Difference]: Start difference. First operand 913 states and 1047 transitions. Second operand 21 states. [2020-12-22 19:05:18,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:18,091 INFO L93 Difference]: Finished difference Result 1210 states and 1374 transitions. [2020-12-22 19:05:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:05:18,092 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 76 [2020-12-22 19:05:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:18,098 INFO L225 Difference]: With dead ends: 1210 [2020-12-22 19:05:18,098 INFO L226 Difference]: Without dead ends: 1210 [2020-12-22 19:05:18,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:05:18,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-12-22 19:05:18,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1046. [2020-12-22 19:05:18,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1046 states. [2020-12-22 19:05:18,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1207 transitions. [2020-12-22 19:05:18,130 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1207 transitions. Word has length 76 [2020-12-22 19:05:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:18,130 INFO L481 AbstractCegarLoop]: Abstraction has 1046 states and 1207 transitions. [2020-12-22 19:05:18,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 19:05:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1207 transitions. [2020-12-22 19:05:18,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 19:05:18,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:18,132 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:18,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 19:05:18,348 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:18,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:18,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1781498856, now seen corresponding path program 4 times [2020-12-22 19:05:18,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:18,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291455263] [2020-12-22 19:05:18,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:05:18,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291455263] [2020-12-22 19:05:18,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251383791] [2020-12-22 19:05:18,819 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 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 [2020-12-22 19:05:18,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:18,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:18,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 19:05:18,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:18,949 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_36|], 1=[|v_#valid_42|]} [2020-12-22 19:05:18,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:05:18,955 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 19:05:18,956 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:18,968 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:18,974 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:05:18,976 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:18,986 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:18,987 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:18,987 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-12-22 19:05:19,285 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 19:05:19,286 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:19,298 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:19,299 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:19,299 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-22 19:05:19,370 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2020-12-22 19:05:19,372 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:19,382 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:19,383 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:19,383 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2020-12-22 19:05:22,514 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 37 [2020-12-22 19:05:22,776 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2020-12-22 19:05:22,779 INFO L547 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:22,804 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:22,809 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:05:22,828 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:22,829 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2020-12-22 19:05:22,831 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:22,898 INFO L625 ElimStorePlain]: treesize reduction 3, result has 93.8 percent of original size [2020-12-22 19:05:22,903 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:22,904 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:65, output treesize:8 [2020-12-22 19:05:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:05:23,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:23,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2020-12-22 19:05:23,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260026968] [2020-12-22 19:05:23,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 19:05:23,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:23,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 19:05:23,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1307, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:05:23,019 INFO L87 Difference]: Start difference. First operand 1046 states and 1207 transitions. Second operand 38 states. [2020-12-22 19:05:24,367 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 19:05:24,814 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 19:05:25,197 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 19:05:25,570 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-12-22 19:05:26,060 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-12-22 19:05:26,583 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-12-22 19:05:27,139 WARN L197 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2020-12-22 19:05:31,563 WARN L197 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2020-12-22 19:05:36,016 WARN L197 SmtUtils]: Spent 4.37 s on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2020-12-22 19:05:40,583 WARN L197 SmtUtils]: Spent 4.48 s on a formula simplification. DAG size of input: 100 DAG size of output: 74 [2020-12-22 19:05:45,223 WARN L197 SmtUtils]: Spent 4.45 s on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2020-12-22 19:05:45,593 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 19:05:45,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:45,672 INFO L93 Difference]: Finished difference Result 1017 states and 1162 transitions. [2020-12-22 19:05:45,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 19:05:45,673 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 78 [2020-12-22 19:05:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:45,677 INFO L225 Difference]: With dead ends: 1017 [2020-12-22 19:05:45,677 INFO L226 Difference]: Without dead ends: 910 [2020-12-22 19:05:45,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=462, Invalid=2844, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 19:05:45,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2020-12-22 19:05:45,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 900. [2020-12-22 19:05:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2020-12-22 19:05:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1037 transitions. [2020-12-22 19:05:45,691 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1037 transitions. Word has length 78 [2020-12-22 19:05:45,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:45,691 INFO L481 AbstractCegarLoop]: Abstraction has 900 states and 1037 transitions. [2020-12-22 19:05:45,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 19:05:45,691 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1037 transitions. [2020-12-22 19:05:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 19:05:45,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:45,693 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:45,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 19:05:45,907 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:45,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:45,907 INFO L82 PathProgramCache]: Analyzing trace with hash 66708385, now seen corresponding path program 5 times [2020-12-22 19:05:45,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:45,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329608919] [2020-12-22 19:05:45,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 20 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:46,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329608919] [2020-12-22 19:05:46,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068682297] [2020-12-22 19:05:46,801 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 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 [2020-12-22 19:05:46,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 19:05:46,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:46,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 19:05:46,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:46,971 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:05:46,973 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:46,979 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:46,980 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:46,980 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:05:47,341 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:05:47,342 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:47,354 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:47,356 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:47,356 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:05:47,447 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-22 19:05:47,448 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:47,462 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:47,464 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:47,464 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:31 [2020-12-22 19:05:50,689 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 19:05:51,059 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:51,060 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 70 [2020-12-22 19:05:51,064 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:51,129 INFO L625 ElimStorePlain]: treesize reduction 17, result has 72.1 percent of original size [2020-12-22 19:05:51,133 INFO L547 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:51,133 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:53, output treesize:8 [2020-12-22 19:05:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 20 proven. 59 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:05:51,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:51,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 42 [2020-12-22 19:05:51,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417373114] [2020-12-22 19:05:51,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 19:05:51,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:51,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 19:05:51,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 19:05:51,240 INFO L87 Difference]: Start difference. First operand 900 states and 1037 transitions. Second operand 42 states. [2020-12-22 19:05:54,692 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-12-22 19:05:54,914 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-12-22 19:05:55,237 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-12-22 19:05:55,503 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2020-12-22 19:05:55,802 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-12-22 19:05:56,126 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2020-12-22 19:05:56,433 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-12-22 19:05:56,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:56,499 INFO L93 Difference]: Finished difference Result 877 states and 1005 transitions. [2020-12-22 19:05:56,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 19:05:56,500 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 78 [2020-12-22 19:05:56,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:56,503 INFO L225 Difference]: With dead ends: 877 [2020-12-22 19:05:56,503 INFO L226 Difference]: Without dead ends: 739 [2020-12-22 19:05:56,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=425, Invalid=3235, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 19:05:56,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2020-12-22 19:05:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 736. [2020-12-22 19:05:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-12-22 19:05:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 857 transitions. [2020-12-22 19:05:56,514 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 857 transitions. Word has length 78 [2020-12-22 19:05:56,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:56,515 INFO L481 AbstractCegarLoop]: Abstraction has 736 states and 857 transitions. [2020-12-22 19:05:56,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 19:05:56,515 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 857 transitions. [2020-12-22 19:05:56,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 19:05:56,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:56,516 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:56,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:56,730 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:56,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:56,730 INFO L82 PathProgramCache]: Analyzing trace with hash 149401028, now seen corresponding path program 6 times [2020-12-22 19:05:56,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:56,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410756251] [2020-12-22 19:05:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 6 proven. 102 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:05:57,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410756251] [2020-12-22 19:05:57,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351735343] [2020-12-22 19:05:57,045 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 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 [2020-12-22 19:05:57,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 19:05:57,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:57,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:05:57,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 15 proven. 93 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:05:57,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:57,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2020-12-22 19:05:57,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344916505] [2020-12-22 19:05:57,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 19:05:57,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:57,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 19:05:57,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:05:57,789 INFO L87 Difference]: Start difference. First operand 736 states and 857 transitions. Second operand 28 states. [2020-12-22 19:05:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:59,715 INFO L93 Difference]: Finished difference Result 862 states and 963 transitions. [2020-12-22 19:05:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 19:05:59,716 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2020-12-22 19:05:59,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:59,720 INFO L225 Difference]: With dead ends: 862 [2020-12-22 19:05:59,720 INFO L226 Difference]: Without dead ends: 862 [2020-12-22 19:05:59,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=474, Invalid=1688, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 19:05:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2020-12-22 19:05:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 736. [2020-12-22 19:05:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-12-22 19:05:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 853 transitions. [2020-12-22 19:05:59,731 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 853 transitions. Word has length 82 [2020-12-22 19:05:59,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:59,731 INFO L481 AbstractCegarLoop]: Abstraction has 736 states and 853 transitions. [2020-12-22 19:05:59,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 19:05:59,731 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 853 transitions. [2020-12-22 19:05:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 19:05:59,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:59,733 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:59,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-22 19:05:59,949 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:05:59,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:59,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1760327563, now seen corresponding path program 7 times [2020-12-22 19:05:59,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:59,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561415139] [2020-12-22 19:05:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:06:00,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561415139] [2020-12-22 19:06:00,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238101118] [2020-12-22 19:06:00,270 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 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 [2020-12-22 19:06:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:00,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 19:06:00,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:06:00,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:00,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2020-12-22 19:06:00,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029786620] [2020-12-22 19:06:00,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 19:06:00,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:00,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 19:06:00,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:06:00,760 INFO L87 Difference]: Start difference. First operand 736 states and 853 transitions. Second operand 22 states. [2020-12-22 19:06:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:01,922 INFO L93 Difference]: Finished difference Result 790 states and 892 transitions. [2020-12-22 19:06:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:06:01,923 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2020-12-22 19:06:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:01,927 INFO L225 Difference]: With dead ends: 790 [2020-12-22 19:06:01,927 INFO L226 Difference]: Without dead ends: 790 [2020-12-22 19:06:01,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:06:01,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2020-12-22 19:06:01,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 736. [2020-12-22 19:06:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-12-22 19:06:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 850 transitions. [2020-12-22 19:06:01,937 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 850 transitions. Word has length 82 [2020-12-22 19:06:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:01,938 INFO L481 AbstractCegarLoop]: Abstraction has 736 states and 850 transitions. [2020-12-22 19:06:01,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 19:06:01,938 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 850 transitions. [2020-12-22 19:06:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 19:06:01,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:01,939 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:02,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:02,155 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:06:02,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:02,155 INFO L82 PathProgramCache]: Analyzing trace with hash 87879678, now seen corresponding path program 8 times [2020-12-22 19:06:02,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:02,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410709972] [2020-12-22 19:06:02,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 6 proven. 86 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:06:02,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410709972] [2020-12-22 19:06:02,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121224275] [2020-12-22 19:06:02,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 19:06:02,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:06:02,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:02,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 19:06:02,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:06:02,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:02,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2020-12-22 19:06:02,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622570023] [2020-12-22 19:06:02,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 19:06:02,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:02,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 19:06:02,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:06:02,976 INFO L87 Difference]: Start difference. First operand 736 states and 850 transitions. Second operand 21 states. [2020-12-22 19:06:04,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:04,016 INFO L93 Difference]: Finished difference Result 788 states and 892 transitions. [2020-12-22 19:06:04,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 19:06:04,018 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2020-12-22 19:06:04,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:04,020 INFO L225 Difference]: With dead ends: 788 [2020-12-22 19:06:04,020 INFO L226 Difference]: Without dead ends: 788 [2020-12-22 19:06:04,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:06:04,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2020-12-22 19:06:04,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 736. [2020-12-22 19:06:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-12-22 19:06:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 848 transitions. [2020-12-22 19:06:04,029 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 848 transitions. Word has length 82 [2020-12-22 19:06:04,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:04,030 INFO L481 AbstractCegarLoop]: Abstraction has 736 states and 848 transitions. [2020-12-22 19:06:04,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 19:06:04,030 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 848 transitions. [2020-12-22 19:06:04,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 19:06:04,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:04,031 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:04,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:04,244 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:06:04,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:04,245 INFO L82 PathProgramCache]: Analyzing trace with hash 137946287, now seen corresponding path program 8 times [2020-12-22 19:06:04,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:04,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052941878] [2020-12-22 19:06:04,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 19:06:04,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052941878] [2020-12-22 19:06:04,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791824504] [2020-12-22 19:06:04,549 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 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 [2020-12-22 19:06:04,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:06:04,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:04,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:06:04,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 19:06:05,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:05,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2020-12-22 19:06:05,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014035756] [2020-12-22 19:06:05,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:06:05,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:05,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:06:05,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:06:05,086 INFO L87 Difference]: Start difference. First operand 736 states and 848 transitions. Second operand 23 states. [2020-12-22 19:06:06,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:06,233 INFO L93 Difference]: Finished difference Result 785 states and 892 transitions. [2020-12-22 19:06:06,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 19:06:06,234 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 82 [2020-12-22 19:06:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:06,238 INFO L225 Difference]: With dead ends: 785 [2020-12-22 19:06:06,238 INFO L226 Difference]: Without dead ends: 785 [2020-12-22 19:06:06,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=294, Invalid=966, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:06:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-12-22 19:06:06,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 736. [2020-12-22 19:06:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-12-22 19:06:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 847 transitions. [2020-12-22 19:06:06,247 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 847 transitions. Word has length 82 [2020-12-22 19:06:06,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:06,247 INFO L481 AbstractCegarLoop]: Abstraction has 736 states and 847 transitions. [2020-12-22 19:06:06,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:06:06,247 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 847 transitions. [2020-12-22 19:06:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 19:06:06,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:06,249 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:06,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 19:06:06,453 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:06:06,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:06,454 INFO L82 PathProgramCache]: Analyzing trace with hash -725839209, now seen corresponding path program 6 times [2020-12-22 19:06:06,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:06,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856805150] [2020-12-22 19:06:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:06:06,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856805150] [2020-12-22 19:06:06,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654679455] [2020-12-22 19:06:06,834 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 [2020-12-22 19:06:07,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 19:06:07,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:07,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:06:07,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:07,083 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:06:07,084 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 19:06:07,086 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:06:07,122 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:06:07,125 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:06:07,126 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:06:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:06:07,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:07,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2020-12-22 19:06:07,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545745914] [2020-12-22 19:06:07,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 19:06:07,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:07,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 19:06:07,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:06:07,898 INFO L87 Difference]: Start difference. First operand 736 states and 847 transitions. Second operand 32 states. [2020-12-22 19:06:10,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:10,361 INFO L93 Difference]: Finished difference Result 900 states and 1013 transitions. [2020-12-22 19:06:10,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:06:10,362 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 85 [2020-12-22 19:06:10,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:10,365 INFO L225 Difference]: With dead ends: 900 [2020-12-22 19:06:10,366 INFO L226 Difference]: Without dead ends: 898 [2020-12-22 19:06:10,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:06:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-12-22 19:06:10,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 771. [2020-12-22 19:06:10,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2020-12-22 19:06:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 892 transitions. [2020-12-22 19:06:10,375 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 892 transitions. Word has length 85 [2020-12-22 19:06:10,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:10,375 INFO L481 AbstractCegarLoop]: Abstraction has 771 states and 892 transitions. [2020-12-22 19:06:10,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 19:06:10,376 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 892 transitions. [2020-12-22 19:06:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 19:06:10,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:10,383 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:10,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:10,597 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:06:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:10,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1679386246, now seen corresponding path program 8 times [2020-12-22 19:06:10,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:10,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327879165] [2020-12-22 19:06:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:06:11,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327879165] [2020-12-22 19:06:11,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560569130] [2020-12-22 19:06:11,032 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 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 [2020-12-22 19:06:11,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:06:11,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:11,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 19:06:11,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:11,169 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 19:06:11,171 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:06:11,178 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:06:11,179 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:06:11,180 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:06:11,538 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:06:11,539 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:06:11,552 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:06:11,553 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:06:11,553 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:06:11,637 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-22 19:06:11,639 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:06:11,653 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:06:11,655 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 19:06:11,655 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 19:06:12,587 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:06:12,587 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-22 19:06:12,589 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:06:12,614 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-22 19:06:12,617 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:06:12,617 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:38, output treesize:3 [2020-12-22 19:06:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:06:12,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:12,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2020-12-22 19:06:12,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988548166] [2020-12-22 19:06:12,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 19:06:12,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:12,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 19:06:12,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:06:12,669 INFO L87 Difference]: Start difference. First operand 771 states and 892 transitions. Second operand 30 states. [2020-12-22 19:06:13,716 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 19:06:18,158 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 51 DAG size of output: 41