/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/openbsd_cstrcspn-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:00:24,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:00:24,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:00:24,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:00:24,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:00:24,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:00:24,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:00:24,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:00:24,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:00:24,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:00:24,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:00:24,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:00:24,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:00:24,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:00:24,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:00:24,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:00:24,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:00:24,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:00:24,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:00:25,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:00:25,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:00:25,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:00:25,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:00:25,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:00:25,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:00:25,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:00:25,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:00:25,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:00:25,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:00:25,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:00:25,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:00:25,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:00:25,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:00:25,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:00:25,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:00:25,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:00:25,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:00:25,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:00:25,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:00:25,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:00:25,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:00:25,072 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:00:25,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:00:25,072 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:00:25,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:00:25,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:00:25,073 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:00:25,075 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:00:25,075 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:00:25,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:00:25,076 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:00:25,076 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:00:25,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:00:25,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:00:25,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:00:25,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:00:25,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:00:25,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:00:25,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:00:25,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:00:25,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:00:25,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:00:25,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:00:25,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:00:25,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:00:25,641 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:00:25,643 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:00:25,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2020-12-22 19:00:25,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1037b0e2b/fa47614bda464ea2baaa7ff84340d96f/FLAGf36f114b4 [2020-12-22 19:00:26,677 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:00:26,681 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2020-12-22 19:00:26,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1037b0e2b/fa47614bda464ea2baaa7ff84340d96f/FLAGf36f114b4 [2020-12-22 19:00:26,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1037b0e2b/fa47614bda464ea2baaa7ff84340d96f [2020-12-22 19:00:26,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:00:26,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:00:26,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:00:26,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:00:26,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:00:26,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:00:26" (1/1) ... [2020-12-22 19:00:26,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52ebb40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:26, skipping insertion in model container [2020-12-22 19:00:26,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:00:26" (1/1) ... [2020-12-22 19:00:26,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:00:27,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:00:27,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:00:27,560 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:00:27,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:00:27,724 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:00:27,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:27 WrapperNode [2020-12-22 19:00:27,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:00:27,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:00:27,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:00:27,728 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:00:27,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:27" (1/1) ... [2020-12-22 19:00:27,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:27" (1/1) ... [2020-12-22 19:00:27,788 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:00:27,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:00:27,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:00:27,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:00:27,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:27" (1/1) ... [2020-12-22 19:00:27,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:27" (1/1) ... [2020-12-22 19:00:27,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:27" (1/1) ... [2020-12-22 19:00:27,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:27" (1/1) ... [2020-12-22 19:00:27,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:27" (1/1) ... [2020-12-22 19:00:27,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:27" (1/1) ... [2020-12-22 19:00:27,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:27" (1/1) ... [2020-12-22 19:00:27,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:00:27,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:00:27,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:00:27,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:00:27,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:27" (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 19:00:28,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:00:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:00:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:00:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:00:28,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:00:28,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:00:28,657 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:00:28,657 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-22 19:00:28,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:00:28 BoogieIcfgContainer [2020-12-22 19:00:28,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:00:28,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:00:28,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:00:28,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:00:28,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:00:26" (1/3) ... [2020-12-22 19:00:28,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1681dbcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:00:28, skipping insertion in model container [2020-12-22 19:00:28,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:27" (2/3) ... [2020-12-22 19:00:28,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1681dbcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:00:28, skipping insertion in model container [2020-12-22 19:00:28,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:00:28" (3/3) ... [2020-12-22 19:00:28,672 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-2.i [2020-12-22 19:00:28,680 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:00:28,686 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-12-22 19:00:28,712 INFO L253 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-12-22 19:00:28,742 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:00:28,742 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:00:28,742 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:00:28,742 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:00:28,743 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:00:28,743 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:00:28,743 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:00:28,743 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:00:28,761 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-12-22 19:00:28,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:00:28,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:28,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:28,770 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:28,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:28,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-12-22 19:00:28,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:28,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220427793] [2020-12-22 19:00:28,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:29,057 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 19:00:29,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220427793] [2020-12-22 19:00:29,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:29,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:29,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866242300] [2020-12-22 19:00:29,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:29,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:29,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:29,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:29,097 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2020-12-22 19:00:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:29,228 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2020-12-22 19:00:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:29,233 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 19:00:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:29,246 INFO L225 Difference]: With dead ends: 76 [2020-12-22 19:00:29,247 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 19:00:29,249 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 19:00:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 19:00:29,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 43. [2020-12-22 19:00:29,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 19:00:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-12-22 19:00:29,304 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2020-12-22 19:00:29,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:29,305 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-12-22 19:00:29,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:29,305 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-12-22 19:00:29,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:00:29,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:29,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:29,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:00:29,307 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:29,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2020-12-22 19:00:29,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:29,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249110876] [2020-12-22 19:00:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:29,390 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 19:00:29,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249110876] [2020-12-22 19:00:29,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:29,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:00:29,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172798475] [2020-12-22 19:00:29,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:00:29,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:29,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:00:29,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:00:29,396 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 3 states. [2020-12-22 19:00:29,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:29,448 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-12-22 19:00:29,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:00:29,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 19:00:29,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:29,450 INFO L225 Difference]: With dead ends: 41 [2020-12-22 19:00:29,450 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 19:00:29,451 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 19:00:29,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 19:00:29,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-22 19:00:29,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 19:00:29,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-12-22 19:00:29,459 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 7 [2020-12-22 19:00:29,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:29,459 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-12-22 19:00:29,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:00:29,460 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-12-22 19:00:29,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:00:29,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:29,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:29,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:00:29,461 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:29,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:29,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2020-12-22 19:00:29,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:29,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466655666] [2020-12-22 19:00:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:29,570 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 19:00:29,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466655666] [2020-12-22 19:00:29,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:29,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:00:29,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858648662] [2020-12-22 19:00:29,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:29,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:29,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:29,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:29,574 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 4 states. [2020-12-22 19:00:29,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:29,773 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2020-12-22 19:00:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:29,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 19:00:29,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:29,775 INFO L225 Difference]: With dead ends: 73 [2020-12-22 19:00:29,775 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 19:00:29,776 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 19:00:29,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 19:00:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2020-12-22 19:00:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 19:00:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-12-22 19:00:29,784 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 7 [2020-12-22 19:00:29,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:29,784 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-12-22 19:00:29,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:29,785 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-12-22 19:00:29,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:00:29,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:29,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:29,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:00:29,787 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:29,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:29,788 INFO L82 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2020-12-22 19:00:29,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:29,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498655188] [2020-12-22 19:00:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:29,862 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 19:00:29,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498655188] [2020-12-22 19:00:29,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:29,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:00:29,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631151140] [2020-12-22 19:00:29,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:29,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:29,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:29,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:29,866 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 4 states. [2020-12-22 19:00:29,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:29,911 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-12-22 19:00:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:29,913 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 19:00:29,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:29,914 INFO L225 Difference]: With dead ends: 42 [2020-12-22 19:00:29,915 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 19:00:29,916 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 19:00:29,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 19:00:29,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 19:00:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 19:00:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-12-22 19:00:29,923 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 9 [2020-12-22 19:00:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:29,923 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-12-22 19:00:29,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-12-22 19:00:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:00:29,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:29,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:29,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:00:29,926 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:29,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:29,927 INFO L82 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2020-12-22 19:00:29,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:29,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018815534] [2020-12-22 19:00:29,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:29,984 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 19:00:29,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018815534] [2020-12-22 19:00:29,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:29,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:29,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003143655] [2020-12-22 19:00:29,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:29,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:29,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:29,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:29,988 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 4 states. [2020-12-22 19:00:30,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:30,028 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-12-22 19:00:30,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:30,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 19:00:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:30,030 INFO L225 Difference]: With dead ends: 74 [2020-12-22 19:00:30,030 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 19:00:30,031 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 19:00:30,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 19:00:30,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-12-22 19:00:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 19:00:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2020-12-22 19:00:30,040 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 9 [2020-12-22 19:00:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:30,040 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2020-12-22 19:00:30,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2020-12-22 19:00:30,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:00:30,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:30,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:30,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 19:00:30,042 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:30,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:30,043 INFO L82 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2020-12-22 19:00:30,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:30,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206481083] [2020-12-22 19:00:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:30,080 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 19:00:30,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206481083] [2020-12-22 19:00:30,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:30,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:00:30,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48069609] [2020-12-22 19:00:30,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:00:30,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:30,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:00:30,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:00:30,084 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 3 states. [2020-12-22 19:00:30,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:30,166 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-12-22 19:00:30,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:00:30,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-22 19:00:30,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:30,172 INFO L225 Difference]: With dead ends: 51 [2020-12-22 19:00:30,172 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 19:00:30,173 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 19:00:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 19:00:30,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 19:00:30,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 19:00:30,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-12-22 19:00:30,189 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 9 [2020-12-22 19:00:30,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:30,190 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-12-22 19:00:30,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:00:30,190 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-12-22 19:00:30,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:00:30,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:30,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:30,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 19:00:30,192 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:30,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:30,192 INFO L82 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2020-12-22 19:00:30,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:30,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070857054] [2020-12-22 19:00:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:30,268 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 19:00:30,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070857054] [2020-12-22 19:00:30,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:30,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:30,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187809141] [2020-12-22 19:00:30,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:30,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:30,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:30,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:00:30,274 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 5 states. [2020-12-22 19:00:30,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:30,422 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-12-22 19:00:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:30,423 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 19:00:30,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:30,424 INFO L225 Difference]: With dead ends: 74 [2020-12-22 19:00:30,424 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 19:00:30,425 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 19:00:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 19:00:30,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-12-22 19:00:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 19:00:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-12-22 19:00:30,432 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 9 [2020-12-22 19:00:30,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:30,432 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-12-22 19:00:30,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:30,432 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-12-22 19:00:30,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 19:00:30,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:30,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:30,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 19:00:30,434 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:30,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:30,434 INFO L82 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2020-12-22 19:00:30,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:30,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819004320] [2020-12-22 19:00:30,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:30,519 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 19:00:30,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819004320] [2020-12-22 19:00:30,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:30,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:00:30,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208216115] [2020-12-22 19:00:30,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:30,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:30,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:30,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:30,523 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 4 states. [2020-12-22 19:00:30,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:30,584 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-12-22 19:00:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:30,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 19:00:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:30,588 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:00:30,588 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 19:00:30,589 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 19:00:30,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 19:00:30,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 19:00:30,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 19:00:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-12-22 19:00:30,611 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 10 [2020-12-22 19:00:30,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:30,612 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-12-22 19:00:30,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-12-22 19:00:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 19:00:30,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:30,616 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:30,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 19:00:30,617 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:30,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-12-22 19:00:30,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:30,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083009178] [2020-12-22 19:00:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:30,749 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 19:00:30,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083009178] [2020-12-22 19:00:30,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546320008] [2020-12-22 19:00:30,750 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 19:00:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:30,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:00:30,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:30,922 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_16|], 1=[|v_#valid_24|]} [2020-12-22 19:00:30,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:30,946 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 19:00:30,947 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:30,959 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:30,969 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 19:00:30,977 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:30,987 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:30,991 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 19:00:30,992 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:00:31,031 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 19:00:31,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:31,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 19:00:31,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802858380] [2020-12-22 19:00:31,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:00:31,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:31,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:00:31,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:00:31,034 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 6 states. [2020-12-22 19:00:31,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:31,143 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-12-22 19:00:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:31,143 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-22 19:00:31,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:31,144 INFO L225 Difference]: With dead ends: 83 [2020-12-22 19:00:31,144 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 19:00:31,145 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 19:00:31,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 19:00:31,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 47. [2020-12-22 19:00:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 19:00:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-22 19:00:31,149 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 11 [2020-12-22 19:00:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:31,150 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-22 19:00:31,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:00:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-22 19:00:31,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:00:31,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:31,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:31,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 19:00:31,366 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:31,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:31,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1518446013, now seen corresponding path program 1 times [2020-12-22 19:00:31,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:31,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407117676] [2020-12-22 19:00:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:31,455 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 19:00:31,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407117676] [2020-12-22 19:00:31,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:31,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:31,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656223936] [2020-12-22 19:00:31,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:31,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:31,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:31,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:00:31,458 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 5 states. [2020-12-22 19:00:31,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:31,529 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-12-22 19:00:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:31,530 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-22 19:00:31,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:31,530 INFO L225 Difference]: With dead ends: 46 [2020-12-22 19:00:31,531 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 19:00:31,531 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 19:00:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 19:00:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 19:00:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 19:00:31,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-12-22 19:00:31,535 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 13 [2020-12-22 19:00:31,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:31,535 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-12-22 19:00:31,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:31,535 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-12-22 19:00:31,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:00:31,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:31,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:31,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 19:00:31,537 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:31,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1518446012, now seen corresponding path program 1 times [2020-12-22 19:00:31,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:31,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275132524] [2020-12-22 19:00:31,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:31,677 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 19:00:31,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275132524] [2020-12-22 19:00:31,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:31,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 19:00:31,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214098306] [2020-12-22 19:00:31,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:00:31,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:31,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:00:31,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:31,680 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 7 states. [2020-12-22 19:00:31,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:31,786 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-12-22 19:00:31,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:00:31,786 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-22 19:00:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:31,787 INFO L225 Difference]: With dead ends: 49 [2020-12-22 19:00:31,787 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 19:00:31,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:00:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 19:00:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-22 19:00:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 19:00:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-12-22 19:00:31,792 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 13 [2020-12-22 19:00:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:31,793 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-12-22 19:00:31,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:00:31,793 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-12-22 19:00:31,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:00:31,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:31,794 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:31,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 19:00:31,795 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:31,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:31,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2020-12-22 19:00:31,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:31,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893226490] [2020-12-22 19:00:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:31,872 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 19:00:31,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893226490] [2020-12-22 19:00:31,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842076097] [2020-12-22 19:00:31,873 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 19:00:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:31,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 19:00:31,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:31,953 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:31,954 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 19:00:31,959 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:31,977 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:00:31,980 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 19:00:31,981 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:00:32,025 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 19:00:32,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:32,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 19:00:32,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405337151] [2020-12-22 19:00:32,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:00:32,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:32,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:00:32,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:32,030 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 7 states. [2020-12-22 19:00:32,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:32,145 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-12-22 19:00:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:00:32,146 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-22 19:00:32,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:32,147 INFO L225 Difference]: With dead ends: 68 [2020-12-22 19:00:32,147 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 19:00:32,147 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 19:00:32,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 19:00:32,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-12-22 19:00:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 19:00:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-12-22 19:00:32,151 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 13 [2020-12-22 19:00:32,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:32,151 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-12-22 19:00:32,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:00:32,151 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-12-22 19:00:32,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 19:00:32,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:32,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:32,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 19:00:32,368 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:32,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:32,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1429572955, now seen corresponding path program 1 times [2020-12-22 19:00:32,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:32,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105988085] [2020-12-22 19:00:32,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:32,447 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 19:00:32,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105988085] [2020-12-22 19:00:32,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:32,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:00:32,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258503315] [2020-12-22 19:00:32,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:00:32,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:32,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:00:32,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:00:32,456 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 6 states. [2020-12-22 19:00:32,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:32,580 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-12-22 19:00:32,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:00:32,581 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-22 19:00:32,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:32,582 INFO L225 Difference]: With dead ends: 45 [2020-12-22 19:00:32,582 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 19:00:32,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:00:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 19:00:32,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-22 19:00:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 19:00:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-12-22 19:00:32,587 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 16 [2020-12-22 19:00:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:32,587 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-12-22 19:00:32,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:00:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-12-22 19:00:32,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 19:00:32,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:32,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:32,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 19:00:32,589 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:32,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1429572954, now seen corresponding path program 1 times [2020-12-22 19:00:32,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:32,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370607590] [2020-12-22 19:00:32,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:32,755 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 19:00:32,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370607590] [2020-12-22 19:00:32,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:32,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 19:00:32,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234466902] [2020-12-22 19:00:32,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:00:32,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:32,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:00:32,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:00:32,765 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 8 states. [2020-12-22 19:00:32,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:32,948 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-12-22 19:00:32,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:00:32,949 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-22 19:00:32,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:32,950 INFO L225 Difference]: With dead ends: 48 [2020-12-22 19:00:32,950 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 19:00:32,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:00:32,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 19:00:32,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-12-22 19:00:32,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 19:00:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-12-22 19:00:32,955 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 16 [2020-12-22 19:00:32,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:32,955 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-12-22 19:00:32,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:00:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-12-22 19:00:32,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 19:00:32,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:32,957 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 19:00:32,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 19:00:32,957 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:32,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:32,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2056472215, now seen corresponding path program 1 times [2020-12-22 19:00:32,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:32,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246350161] [2020-12-22 19:00:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:33,103 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 19:00:33,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246350161] [2020-12-22 19:00:33,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:33,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:00:33,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896414738] [2020-12-22 19:00:33,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:33,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:33,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:33,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:33,106 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 4 states. [2020-12-22 19:00:33,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:33,139 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-12-22 19:00:33,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:33,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-22 19:00:33,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:33,140 INFO L225 Difference]: With dead ends: 45 [2020-12-22 19:00:33,140 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 19:00:33,141 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 19:00:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 19:00:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-22 19:00:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 19:00:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-12-22 19:00:33,143 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 20 [2020-12-22 19:00:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:33,143 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-12-22 19:00:33,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-12-22 19:00:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:00:33,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:33,145 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:33,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 19:00:33,145 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:33,146 INFO L82 PathProgramCache]: Analyzing trace with hash 673920784, now seen corresponding path program 1 times [2020-12-22 19:00:33,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:33,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028067833] [2020-12-22 19:00:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:33,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028067833] [2020-12-22 19:00:33,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:33,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 19:00:33,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808601804] [2020-12-22 19:00:33,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 19:00:33,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:33,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 19:00:33,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:00:33,361 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 10 states. [2020-12-22 19:00:33,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:33,675 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-12-22 19:00:33,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:00:33,677 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-12-22 19:00:33,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:33,678 INFO L225 Difference]: With dead ends: 66 [2020-12-22 19:00:33,678 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 19:00:33,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:00:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 19:00:33,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-12-22 19:00:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 19:00:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-12-22 19:00:33,691 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 21 [2020-12-22 19:00:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:33,691 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-12-22 19:00:33,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 19:00:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-12-22 19:00:33,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:00:33,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:33,695 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:33,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 19:00:33,696 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:33,696 INFO L82 PathProgramCache]: Analyzing trace with hash 673922962, now seen corresponding path program 1 times [2020-12-22 19:00:33,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:33,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540907381] [2020-12-22 19:00:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:33,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540907381] [2020-12-22 19:00:33,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:33,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 19:00:33,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141519312] [2020-12-22 19:00:33,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 19:00:33,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:33,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 19:00:33,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:00:33,959 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 10 states. [2020-12-22 19:00:34,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:34,351 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-12-22 19:00:34,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:00:34,351 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-12-22 19:00:34,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:34,352 INFO L225 Difference]: With dead ends: 96 [2020-12-22 19:00:34,353 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 19:00:34,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:00:34,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 19:00:34,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2020-12-22 19:00:34,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 19:00:34,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2020-12-22 19:00:34,357 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 21 [2020-12-22 19:00:34,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:34,357 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2020-12-22 19:00:34,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 19:00:34,358 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2020-12-22 19:00:34,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:00:34,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:34,359 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:34,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 19:00:34,359 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:34,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:34,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1320221744, now seen corresponding path program 1 times [2020-12-22 19:00:34,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:34,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426719324] [2020-12-22 19:00:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:34,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426719324] [2020-12-22 19:00:34,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:34,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 19:00:34,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962774180] [2020-12-22 19:00:34,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 19:00:34,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:34,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 19:00:34,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:00:34,560 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 12 states. [2020-12-22 19:00:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:34,965 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2020-12-22 19:00:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:00:34,966 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-12-22 19:00:34,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:34,967 INFO L225 Difference]: With dead ends: 117 [2020-12-22 19:00:34,968 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 19:00:34,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:00:34,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 19:00:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 74. [2020-12-22 19:00:34,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 19:00:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-12-22 19:00:34,975 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 21 [2020-12-22 19:00:34,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:34,975 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-12-22 19:00:34,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 19:00:34,976 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-12-22 19:00:34,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:00:34,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:34,977 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:34,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 19:00:34,977 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:34,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:34,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1015022958, now seen corresponding path program 1 times [2020-12-22 19:00:34,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:34,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083852440] [2020-12-22 19:00:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:35,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083852440] [2020-12-22 19:00:35,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:35,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 19:00:35,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678183700] [2020-12-22 19:00:35,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 19:00:35,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:35,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 19:00:35,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:00:35,229 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 11 states. [2020-12-22 19:00:35,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:35,529 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2020-12-22 19:00:35,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:00:35,530 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-12-22 19:00:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:35,531 INFO L225 Difference]: With dead ends: 118 [2020-12-22 19:00:35,531 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 19:00:35,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-12-22 19:00:35,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 19:00:35,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2020-12-22 19:00:35,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 19:00:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-12-22 19:00:35,535 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 21 [2020-12-22 19:00:35,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:35,535 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-12-22 19:00:35,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 19:00:35,536 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-12-22 19:00:35,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 19:00:35,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:35,536 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:35,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 19:00:35,537 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:35,538 INFO L82 PathProgramCache]: Analyzing trace with hash -359665389, now seen corresponding path program 1 times [2020-12-22 19:00:35,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:35,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718413187] [2020-12-22 19:00:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:35,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718413187] [2020-12-22 19:00:35,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907366594] [2020-12-22 19:00:35,700 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 19:00:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:35,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 19:00:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:35,812 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:35,813 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 19:00:35,814 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:35,835 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:00:35,838 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 19:00:35,839 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:00:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:36,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:36,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2020-12-22 19:00:36,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395962033] [2020-12-22 19:00:36,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 19:00:36,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:36,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 19:00:36,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:00:36,225 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 20 states. [2020-12-22 19:00:36,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:36,803 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2020-12-22 19:00:36,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:00:36,804 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2020-12-22 19:00:36,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:36,805 INFO L225 Difference]: With dead ends: 101 [2020-12-22 19:00:36,806 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 19:00:36,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:00:36,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 19:00:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-12-22 19:00:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 19:00:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2020-12-22 19:00:36,811 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 25 [2020-12-22 19:00:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:36,812 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2020-12-22 19:00:36,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 19:00:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2020-12-22 19:00:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 19:00:36,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:36,814 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:37,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:37,030 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:37,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:37,032 INFO L82 PathProgramCache]: Analyzing trace with hash 501654165, now seen corresponding path program 1 times [2020-12-22 19:00:37,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:37,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698330344] [2020-12-22 19:00:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:37,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698330344] [2020-12-22 19:00:37,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014476456] [2020-12-22 19:00:37,237 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 19:00:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:37,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 19:00:37,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:37,345 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_19|], 1=[|v_#valid_25|]} [2020-12-22 19:00:37,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:37,352 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 19:00:37,353 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:37,363 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:37,369 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 19:00:37,372 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:37,381 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:37,385 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 19:00:37,385 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:00:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:37,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:37,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2020-12-22 19:00:37,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751812922] [2020-12-22 19:00:37,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 19:00:37,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:37,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 19:00:37,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:00:37,593 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand 16 states. [2020-12-22 19:00:38,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:38,086 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2020-12-22 19:00:38,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:00:38,087 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-12-22 19:00:38,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:38,088 INFO L225 Difference]: With dead ends: 119 [2020-12-22 19:00:38,088 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 19:00:38,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:00:38,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 19:00:38,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2020-12-22 19:00:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-22 19:00:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2020-12-22 19:00:38,094 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 25 [2020-12-22 19:00:38,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:38,094 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2020-12-22 19:00:38,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 19:00:38,095 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2020-12-22 19:00:38,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 19:00:38,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:38,096 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:38,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:38,311 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:38,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1205551803, now seen corresponding path program 2 times [2020-12-22 19:00:38,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:38,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94846855] [2020-12-22 19:00:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:38,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94846855] [2020-12-22 19:00:38,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166986057] [2020-12-22 19:00:38,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:38,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:00:38,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:38,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 19:00:38,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:38,952 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:38,953 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 19:00:38,954 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:38,971 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:00:38,976 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 19:00:38,977 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:00:39,087 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 19:00:39,088 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:39,095 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:39,096 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:39,096 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-22 19:00:39,648 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:39,649 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 22 treesize of output 22 [2020-12-22 19:00:39,653 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:00:39,670 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:39,673 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 19:00:39,680 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:39,680 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:35 [2020-12-22 19:00:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:40,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:40,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 30 [2020-12-22 19:00:40,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756263078] [2020-12-22 19:00:40,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 19:00:40,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:40,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 19:00:40,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:00:40,027 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand 30 states. [2020-12-22 19:00:41,691 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-22 19:00:42,216 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-12-22 19:00:42,933 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-22 19:00:43,533 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-12-22 19:00:44,047 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-12-22 19:00:44,238 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-22 19:00:44,484 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-12-22 19:00:44,870 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-12-22 19:00:45,054 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-12-22 19:00:45,524 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-12-22 19:00:45,879 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-12-22 19:00:46,291 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-12-22 19:00:46,617 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-12-22 19:00:47,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:47,657 INFO L93 Difference]: Finished difference Result 198 states and 215 transitions. [2020-12-22 19:00:47,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 19:00:47,661 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2020-12-22 19:00:47,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:47,662 INFO L225 Difference]: With dead ends: 198 [2020-12-22 19:00:47,662 INFO L226 Difference]: Without dead ends: 182 [2020-12-22 19:00:47,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=919, Invalid=4933, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 19:00:47,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-22 19:00:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 129. [2020-12-22 19:00:47,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-22 19:00:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2020-12-22 19:00:47,691 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 30 [2020-12-22 19:00:47,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:47,691 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2020-12-22 19:00:47,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 19:00:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2020-12-22 19:00:47,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 19:00:47,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:47,692 INFO L422 BasicCegarLoop]: trace histogram [3, 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 19:00:47,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 19:00:47,903 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:47,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:47,904 INFO L82 PathProgramCache]: Analyzing trace with hash -512582047, now seen corresponding path program 2 times [2020-12-22 19:00:47,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:47,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994234430] [2020-12-22 19:00:47,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:48,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994234430] [2020-12-22 19:00:48,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521850719] [2020-12-22 19:00:48,601 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 19:00:48,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:00:48,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:48,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 19:00:48,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:48,704 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 19:00:48,709 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:48,713 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:48,714 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:48,714 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:00:48,862 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 19:00:48,863 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:48,871 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:48,872 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 19:00:48,873 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:00:48,957 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 19:00:48,959 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:48,968 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:48,973 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 19:00:48,973 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 19:00:49,408 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:49,409 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 19:00:49,411 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:00:49,427 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-22 19:00:49,429 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:49,430 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-22 19:00:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:49,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:49,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14] total 35 [2020-12-22 19:00:49,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86959598] [2020-12-22 19:00:49,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 19:00:49,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:49,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 19:00:49,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1104, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:00:49,582 INFO L87 Difference]: Start difference. First operand 129 states and 146 transitions. Second operand 35 states. [2020-12-22 19:00:53,798 WARN L197 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-22 19:00:57,922 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 19:01:01,082 WARN L197 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-12-22 19:01:04,259 WARN L197 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:01:06,908 WARN L197 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-12-22 19:01:10,095 WARN L197 SmtUtils]: Spent 3.11 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:01:13,942 WARN L197 SmtUtils]: Spent 3.77 s on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-12-22 19:01:17,744 WARN L197 SmtUtils]: Spent 3.73 s on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 19:01:20,947 WARN L197 SmtUtils]: Spent 3.13 s on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-12-22 19:01:25,018 WARN L197 SmtUtils]: Spent 4.00 s on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-22 19:01:29,196 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-12-22 19:01:33,151 WARN L197 SmtUtils]: Spent 3.86 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:01:37,318 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 19:01:41,682 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-12-22 19:01:45,840 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-12-22 19:01:51,966 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-12-22 19:01:56,156 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-12-22 19:02:02,304 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-22 19:02:06,457 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-12-22 19:02:08,550 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 37 [2020-12-22 19:02:12,695 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-12-22 19:02:14,769 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 37 [2020-12-22 19:02:18,906 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 19:02:23,050 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-12-22 19:02:25,125 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 19:02:29,286 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-12-22 19:02:31,369 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 41 [2020-12-22 19:02:35,528 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-22 19:02:41,645 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 19:02:47,772 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 19:02:48,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:48,028 INFO L93 Difference]: Finished difference Result 262 states and 282 transitions. [2020-12-22 19:02:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 19:02:48,029 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 33 [2020-12-22 19:02:48,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:48,031 INFO L225 Difference]: With dead ends: 262 [2020-12-22 19:02:48,031 INFO L226 Difference]: Without dead ends: 217 [2020-12-22 19:02:48,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 118.3s TimeCoverageRelationStatistics Valid=803, Invalid=5355, Unknown=4, NotChecked=0, Total=6162 [2020-12-22 19:02:48,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-22 19:02:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 166. [2020-12-22 19:02:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-22 19:02:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 188 transitions. [2020-12-22 19:02:48,039 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 188 transitions. Word has length 33 [2020-12-22 19:02:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:48,039 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 188 transitions. [2020-12-22 19:02:48,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 19:02:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 188 transitions. [2020-12-22 19:02:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 19:02:48,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:48,041 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:48,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:48,255 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:48,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:48,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1263454123, now seen corresponding path program 1 times [2020-12-22 19:02:48,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:48,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369214685] [2020-12-22 19:02:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:48,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369214685] [2020-12-22 19:02:48,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864437084] [2020-12-22 19:02:48,438 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 19:02:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:48,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 19:02:48,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:48,534 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:48,534 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 19:02:48,536 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:48,555 INFO L625 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2020-12-22 19:02:48,559 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 19:02:48,559 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:9, output treesize:5 [2020-12-22 19:02:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:48,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:48,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-12-22 19:02:48,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093834733] [2020-12-22 19:02:48,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:02:48,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:48,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:02:48,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:02:48,847 INFO L87 Difference]: Start difference. First operand 166 states and 188 transitions. Second operand 23 states. [2020-12-22 19:02:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:49,626 INFO L93 Difference]: Finished difference Result 270 states and 295 transitions. [2020-12-22 19:02:49,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 19:02:49,629 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-12-22 19:02:49,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:49,632 INFO L225 Difference]: With dead ends: 270 [2020-12-22 19:02:49,632 INFO L226 Difference]: Without dead ends: 227 [2020-12-22 19:02:49,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=959, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:02:49,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-22 19:02:49,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 204. [2020-12-22 19:02:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-22 19:02:49,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 230 transitions. [2020-12-22 19:02:49,642 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 230 transitions. Word has length 35 [2020-12-22 19:02:49,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:49,642 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 230 transitions. [2020-12-22 19:02:49,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:02:49,642 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 230 transitions. [2020-12-22 19:02:49,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 19:02:49,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:49,643 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:49,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:49,859 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:49,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:49,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1700374044, now seen corresponding path program 3 times [2020-12-22 19:02:49,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:49,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918235772] [2020-12-22 19:02:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:50,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918235772] [2020-12-22 19:02:50,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300338378] [2020-12-22 19:02:50,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:02:50,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 19:02:50,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:50,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 19:02:50,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:50,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:50,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-12-22 19:02:50,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507344130] [2020-12-22 19:02:50,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 19:02:50,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:50,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 19:02:50,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:02:50,340 INFO L87 Difference]: Start difference. First operand 204 states and 230 transitions. Second operand 16 states. [2020-12-22 19:02:50,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:50,831 INFO L93 Difference]: Finished difference Result 272 states and 300 transitions. [2020-12-22 19:02:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:02:50,832 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-12-22 19:02:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:50,834 INFO L225 Difference]: With dead ends: 272 [2020-12-22 19:02:50,834 INFO L226 Difference]: Without dead ends: 272 [2020-12-22 19:02:50,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:02:50,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-22 19:02:50,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 245. [2020-12-22 19:02:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-12-22 19:02:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 276 transitions. [2020-12-22 19:02:50,842 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 276 transitions. Word has length 37 [2020-12-22 19:02:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:50,842 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 276 transitions. [2020-12-22 19:02:50,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 19:02:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 276 transitions. [2020-12-22 19:02:50,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 19:02:50,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:50,844 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:51,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 19:02:51,058 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:51,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:51,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1745665110, now seen corresponding path program 3 times [2020-12-22 19:02:51,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:51,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38298391] [2020-12-22 19:02:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:51,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38298391] [2020-12-22 19:02:51,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742732056] [2020-12-22 19:02:51,337 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 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 19:02:51,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 19:02:51,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:51,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 19:02:51,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:51,589 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 19:02:51,591 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:51,598 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:51,600 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 19:02:51,600 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:02:51,887 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 19:02:51,889 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:51,891 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:51,892 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 19:02:51,892 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 19:02:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:51,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:51,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2020-12-22 19:02:51,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483882677] [2020-12-22 19:02:51,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 19:02:51,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:51,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 19:02:51,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:02:51,905 INFO L87 Difference]: Start difference. First operand 245 states and 276 transitions. Second operand 25 states. [2020-12-22 19:02:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:53,515 INFO L93 Difference]: Finished difference Result 403 states and 441 transitions. [2020-12-22 19:02:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 19:02:53,516 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 39 [2020-12-22 19:02:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:53,518 INFO L225 Difference]: With dead ends: 403 [2020-12-22 19:02:53,519 INFO L226 Difference]: Without dead ends: 352 [2020-12-22 19:02:53,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=334, Invalid=1558, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 19:02:53,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-12-22 19:02:53,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 316. [2020-12-22 19:02:53,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-12-22 19:02:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 355 transitions. [2020-12-22 19:02:53,529 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 355 transitions. Word has length 39 [2020-12-22 19:02:53,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:53,530 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 355 transitions. [2020-12-22 19:02:53,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 19:02:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 355 transitions. [2020-12-22 19:02:53,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 19:02:53,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:53,531 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:53,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 19:02:53,748 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:53,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:53,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1633943257, now seen corresponding path program 4 times [2020-12-22 19:02:53,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:53,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400672797] [2020-12-22 19:02:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:54,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400672797] [2020-12-22 19:02:54,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947515773] [2020-12-22 19:02:54,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:02:54,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:02:54,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:54,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 19:02:54,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:54,123 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:54,124 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 19:02:54,125 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:54,144 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:02:54,147 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 19:02:54,148 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:02:54,239 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 19:02:54,240 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:54,248 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:54,249 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:54,249 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-22 19:02:54,596 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:54,596 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 21 treesize of output 21 [2020-12-22 19:02:54,598 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:02:54,611 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:54,612 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:54,613 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:22 [2020-12-22 19:02:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:54,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:54,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2020-12-22 19:02:54,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296804371] [2020-12-22 19:02:54,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 19:02:54,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:54,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 19:02:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:02:54,859 INFO L87 Difference]: Start difference. First operand 316 states and 355 transitions. Second operand 28 states. [2020-12-22 19:02:56,880 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 19:02:57,493 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 19:02:57,730 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-12-22 19:02:58,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:58,024 INFO L93 Difference]: Finished difference Result 405 states and 445 transitions. [2020-12-22 19:02:58,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 19:02:58,028 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 43 [2020-12-22 19:02:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:58,031 INFO L225 Difference]: With dead ends: 405 [2020-12-22 19:02:58,031 INFO L226 Difference]: Without dead ends: 405 [2020-12-22 19:02:58,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=452, Invalid=2098, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 19:02:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-12-22 19:02:58,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 341. [2020-12-22 19:02:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-12-22 19:02:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 384 transitions. [2020-12-22 19:02:58,042 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 384 transitions. Word has length 43 [2020-12-22 19:02:58,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:58,042 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 384 transitions. [2020-12-22 19:02:58,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 19:02:58,042 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 384 transitions. [2020-12-22 19:02:58,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 19:02:58,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:58,043 INFO L422 BasicCegarLoop]: trace histogram [4, 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 19:02:58,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 19:02:58,257 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:02:58,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:58,258 INFO L82 PathProgramCache]: Analyzing trace with hash -609642832, now seen corresponding path program 4 times [2020-12-22 19:02:58,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:58,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702865706] [2020-12-22 19:02:58,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:58,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702865706] [2020-12-22 19:02:58,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591951257] [2020-12-22 19:02:58,565 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 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 19:02:58,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:02:58,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:58,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 19:02:58,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:58,658 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_23|], 1=[|v_#valid_27|]} [2020-12-22 19:02:58,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:02:58,664 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 19:02:58,666 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:58,678 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:58,685 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 19:02:58,688 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:58,699 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:58,700 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:58,700 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-12-22 19:02:58,902 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 19:02:58,903 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:58,912 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:58,913 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:58,913 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-22 19:02:58,962 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 19:02:58,964 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:58,974 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:58,975 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 19:02:58,975 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:33 [2020-12-22 19:02:59,698 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 19:02:59,701 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 19:02:59,718 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:59,724 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:02:59,725 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 10 [2020-12-22 19:02:59,730 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:59,740 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:59,743 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:59,743 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:50, output treesize:3 [2020-12-22 19:02:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:02:59,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:59,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 29 [2020-12-22 19:02:59,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530211617] [2020-12-22 19:02:59,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 19:02:59,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:59,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 19:02:59,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2020-12-22 19:02:59,784 INFO L87 Difference]: Start difference. First operand 341 states and 384 transitions. Second operand 29 states. [2020-12-22 19:03:00,927 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 19:03:01,157 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-12-22 19:03:01,584 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-12-22 19:03:02,542 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-12-22 19:03:03,210 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-12-22 19:03:03,681 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 19:03:04,214 WARN L197 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-12-22 19:03:04,415 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-22 19:03:04,591 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-12-22 19:03:04,825 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-12-22 19:03:05,119 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-12-22 19:03:05,449 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2020-12-22 19:03:05,840 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2020-12-22 19:03:06,373 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-12-22 19:03:06,706 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-12-22 19:03:07,011 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-12-22 19:03:07,348 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-12-22 19:03:07,920 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-12-22 19:03:08,211 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-12-22 19:03:08,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:08,387 INFO L93 Difference]: Finished difference Result 606 states and 664 transitions. [2020-12-22 19:03:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 19:03:08,388 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 45 [2020-12-22 19:03:08,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:08,391 INFO L225 Difference]: With dead ends: 606 [2020-12-22 19:03:08,391 INFO L226 Difference]: Without dead ends: 478 [2020-12-22 19:03:08,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=625, Invalid=3665, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 19:03:08,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-12-22 19:03:08,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 399. [2020-12-22 19:03:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-12-22 19:03:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 450 transitions. [2020-12-22 19:03:08,403 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 450 transitions. Word has length 45 [2020-12-22 19:03:08,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:08,404 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 450 transitions. [2020-12-22 19:03:08,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 19:03:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 450 transitions. [2020-12-22 19:03:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 19:03:08,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:08,405 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:08,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 19:03:08,621 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:08,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:08,622 INFO L82 PathProgramCache]: Analyzing trace with hash -424649921, now seen corresponding path program 5 times [2020-12-22 19:03:08,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:08,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857053386] [2020-12-22 19:03:08,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:03:08,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857053386] [2020-12-22 19:03:08,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101288724] [2020-12-22 19:03:08,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:03:09,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 19:03:09,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:09,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 19:03:09,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:09,048 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:09,049 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 19:03:09,050 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:09,073 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:03:09,075 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 19:03:09,076 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:03:09,291 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 19:03:09,292 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:09,300 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:09,301 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:09,301 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-22 19:03:09,984 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:09,984 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 22 treesize of output 22 [2020-12-22 19:03:09,986 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:03:10,003 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:10,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 19:03:10,008 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:10,009 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:35 [2020-12-22 19:03:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:03:10,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:10,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2020-12-22 19:03:10,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903291955] [2020-12-22 19:03:10,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 19:03:10,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:10,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 19:03:10,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1173, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:03:10,361 INFO L87 Difference]: Start difference. First operand 399 states and 450 transitions. Second operand 36 states. [2020-12-22 19:03:11,872 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-22 19:03:12,234 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-12-22 19:03:12,746 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-12-22 19:03:13,443 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-12-22 19:03:13,638 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 19:03:14,501 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-12-22 19:03:14,796 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-22 19:03:15,084 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-22 19:03:15,558 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 19:03:15,786 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-12-22 19:03:16,087 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-12-22 19:03:16,330 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-12-22 19:03:16,795 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-12-22 19:03:17,223 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-12-22 19:03:17,425 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-12-22 19:03:17,618 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 19:03:17,976 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-12-22 19:03:18,400 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-12-22 19:03:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:19,867 INFO L93 Difference]: Finished difference Result 750 states and 821 transitions. [2020-12-22 19:03:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 19:03:19,867 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 48 [2020-12-22 19:03:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:19,870 INFO L225 Difference]: With dead ends: 750 [2020-12-22 19:03:19,870 INFO L226 Difference]: Without dead ends: 640 [2020-12-22 19:03:19,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=995, Invalid=6145, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 19:03:19,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-12-22 19:03:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 519. [2020-12-22 19:03:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-12-22 19:03:19,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 586 transitions. [2020-12-22 19:03:19,888 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 586 transitions. Word has length 48 [2020-12-22 19:03:19,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:19,888 INFO L481 AbstractCegarLoop]: Abstraction has 519 states and 586 transitions. [2020-12-22 19:03:19,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 19:03:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 586 transitions. [2020-12-22 19:03:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 19:03:19,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:19,890 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:20,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 19:03:20,105 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:20,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:20,106 INFO L82 PathProgramCache]: Analyzing trace with hash 589899187, now seen corresponding path program 5 times [2020-12-22 19:03:20,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:20,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223522845] [2020-12-22 19:03:20,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:03:20,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223522845] [2020-12-22 19:03:20,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641767649] [2020-12-22 19:03:20,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:03:20,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 19:03:20,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:20,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 19:03:20,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:20,447 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_25|], 1=[|v_#valid_28|]} [2020-12-22 19:03:20,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:03:20,452 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 19:03:20,453 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:20,466 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:20,472 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 19:03:20,474 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:20,486 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:20,488 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 19:03:20,488 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:03:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:03:20,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:20,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2020-12-22 19:03:20,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720385805] [2020-12-22 19:03:20,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 19:03:20,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:20,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 19:03:20,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:03:20,781 INFO L87 Difference]: Start difference. First operand 519 states and 586 transitions. Second operand 20 states. [2020-12-22 19:03:21,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:21,662 INFO L93 Difference]: Finished difference Result 704 states and 784 transitions. [2020-12-22 19:03:21,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:03:21,663 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-12-22 19:03:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:21,666 INFO L225 Difference]: With dead ends: 704 [2020-12-22 19:03:21,666 INFO L226 Difference]: Without dead ends: 704 [2020-12-22 19:03:21,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:03:21,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2020-12-22 19:03:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 611. [2020-12-22 19:03:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-12-22 19:03:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 690 transitions. [2020-12-22 19:03:21,682 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 690 transitions. Word has length 49 [2020-12-22 19:03:21,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:21,682 INFO L481 AbstractCegarLoop]: Abstraction has 611 states and 690 transitions. [2020-12-22 19:03:21,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 19:03:21,682 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 690 transitions. [2020-12-22 19:03:21,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 19:03:21,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:21,684 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:21,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:03:21,899 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:21,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:21,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1586425820, now seen corresponding path program 6 times [2020-12-22 19:03:21,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:21,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506833759] [2020-12-22 19:03:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:03:22,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506833759] [2020-12-22 19:03:22,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532482771] [2020-12-22 19:03:22,289 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 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 19:03:22,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 19:03:22,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:22,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 19:03:22,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:22,629 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 19:03:22,630 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:22,638 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:22,639 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 19:03:22,640 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:03:23,003 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 19:03:23,007 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:23,009 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:23,010 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 19:03:23,010 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 19:03:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:03:23,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:23,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 31 [2020-12-22 19:03:23,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700650137] [2020-12-22 19:03:23,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 19:03:23,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:23,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 19:03:23,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2020-12-22 19:03:23,033 INFO L87 Difference]: Start difference. First operand 611 states and 690 transitions. Second operand 31 states. [2020-12-22 19:03:25,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:25,988 INFO L93 Difference]: Finished difference Result 946 states and 1048 transitions. [2020-12-22 19:03:25,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 19:03:25,990 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 57 [2020-12-22 19:03:25,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:25,994 INFO L225 Difference]: With dead ends: 946 [2020-12-22 19:03:25,994 INFO L226 Difference]: Without dead ends: 815 [2020-12-22 19:03:25,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=432, Invalid=2648, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 19:03:25,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2020-12-22 19:03:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 744. [2020-12-22 19:03:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-12-22 19:03:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 841 transitions. [2020-12-22 19:03:26,014 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 841 transitions. Word has length 57 [2020-12-22 19:03:26,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:26,014 INFO L481 AbstractCegarLoop]: Abstraction has 744 states and 841 transitions. [2020-12-22 19:03:26,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 19:03:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 841 transitions. [2020-12-22 19:03:26,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 19:03:26,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:26,016 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:26,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:03:26,230 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:03:26,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:26,231 INFO L82 PathProgramCache]: Analyzing trace with hash -377019521, now seen corresponding path program 6 times [2020-12-22 19:03:26,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:26,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809560186] [2020-12-22 19:03:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:03:26,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809560186] [2020-12-22 19:03:26,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849458266] [2020-12-22 19:03:26,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:03:26,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 19:03:26,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:26,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 19:03:26,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:26,743 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 19:03:26,745 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:26,750 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:26,751 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:26,751 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:03:27,001 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 19:03:27,002 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:27,011 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:27,012 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 19:03:27,013 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:03:27,095 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 19:03:27,097 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:27,109 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:27,112 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 19:03:27,112 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 19:03:28,001 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:28,002 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 19:03:28,004 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:03:28,023 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-22 19:03:28,026 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:28,026 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-22 19:03:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:03:28,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:28,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2020-12-22 19:03:28,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439957387] [2020-12-22 19:03:28,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 19:03:28,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:28,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 19:03:28,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2020-12-22 19:03:28,062 INFO L87 Difference]: Start difference. First operand 744 states and 841 transitions. Second operand 31 states. [2020-12-22 19:03:33,141 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-22 19:03:37,298 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:38,115 WARN L197 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:42,396 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-12-22 19:03:46,847 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:49,197 WARN L197 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-12-22 19:03:53,548 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:57,700 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 19:04:02,007 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-12-22 19:04:02,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:02,311 INFO L93 Difference]: Finished difference Result 1369 states and 1518 transitions. [2020-12-22 19:04:02,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 19:04:02,311 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 57 [2020-12-22 19:04:02,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:02,315 INFO L225 Difference]: With dead ends: 1369 [2020-12-22 19:04:02,315 INFO L226 Difference]: Without dead ends: 992 [2020-12-22 19:04:02,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=301, Invalid=2149, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:04:02,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2020-12-22 19:04:02,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 807. [2020-12-22 19:04:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 807 states. [2020-12-22 19:04:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 912 transitions. [2020-12-22 19:04:02,337 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 912 transitions. Word has length 57 [2020-12-22 19:04:02,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:02,337 INFO L481 AbstractCegarLoop]: Abstraction has 807 states and 912 transitions. [2020-12-22 19:04:02,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 19:04:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 912 transitions. [2020-12-22 19:04:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 19:04:02,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:02,339 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:02,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 19:04:02,553 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:02,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:02,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2072623007, now seen corresponding path program 7 times [2020-12-22 19:04:02,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:02,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719204315] [2020-12-22 19:04:02,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:02,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719204315] [2020-12-22 19:04:02,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356095305] [2020-12-22 19:04:02,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:03,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 19:04:03,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:03,030 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:03,030 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 19:04:03,032 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:03,052 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:04:03,055 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 19:04:03,055 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:04:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:03,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:03,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2020-12-22 19:04:03,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586267085] [2020-12-22 19:04:03,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 19:04:03,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:03,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 19:04:03,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:04:03,748 INFO L87 Difference]: Start difference. First operand 807 states and 912 transitions. Second operand 35 states. [2020-12-22 19:04:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:05,301 INFO L93 Difference]: Finished difference Result 973 states and 1080 transitions. [2020-12-22 19:04:05,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 19:04:05,302 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 61 [2020-12-22 19:04:05,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:05,306 INFO L225 Difference]: With dead ends: 973 [2020-12-22 19:04:05,306 INFO L226 Difference]: Without dead ends: 973 [2020-12-22 19:04:05,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 19:04:05,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2020-12-22 19:04:05,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 847. [2020-12-22 19:04:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 847 states. [2020-12-22 19:04:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 959 transitions. [2020-12-22 19:04:05,327 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 959 transitions. Word has length 61 [2020-12-22 19:04:05,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:05,328 INFO L481 AbstractCegarLoop]: Abstraction has 847 states and 959 transitions. [2020-12-22 19:04:05,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 19:04:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 959 transitions. [2020-12-22 19:04:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 19:04:05,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:05,329 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:05,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:05,545 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:05,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:05,546 INFO L82 PathProgramCache]: Analyzing trace with hash -424589822, now seen corresponding path program 7 times [2020-12-22 19:04:05,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:05,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70506375] [2020-12-22 19:04:05,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:05,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70506375] [2020-12-22 19:04:05,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536631298] [2020-12-22 19:04:05,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:04:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:05,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 19:04:05,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:06,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:06,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2020-12-22 19:04:06,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380263946] [2020-12-22 19:04:06,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:04:06,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:06,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:04:06,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:04:06,276 INFO L87 Difference]: Start difference. First operand 847 states and 959 transitions. Second operand 23 states. [2020-12-22 19:04:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:07,279 INFO L93 Difference]: Finished difference Result 1188 states and 1332 transitions. [2020-12-22 19:04:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:04:07,280 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-12-22 19:04:07,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:07,285 INFO L225 Difference]: With dead ends: 1188 [2020-12-22 19:04:07,286 INFO L226 Difference]: Without dead ends: 1188 [2020-12-22 19:04:07,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:04:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2020-12-22 19:04:07,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 972. [2020-12-22 19:04:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 972 states. [2020-12-22 19:04:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1101 transitions. [2020-12-22 19:04:07,309 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1101 transitions. Word has length 61 [2020-12-22 19:04:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:07,309 INFO L481 AbstractCegarLoop]: Abstraction has 972 states and 1101 transitions. [2020-12-22 19:04:07,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:04:07,310 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1101 transitions. [2020-12-22 19:04:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 19:04:07,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:07,311 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:07,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 19:04:07,526 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:07,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:07,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1455608263, now seen corresponding path program 8 times [2020-12-22 19:04:07,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:07,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204131748] [2020-12-22 19:04:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:08,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204131748] [2020-12-22 19:04:08,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052809813] [2020-12-22 19:04:08,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:04:08,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:04:08,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:08,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 19:04:08,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:08,411 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 19:04:08,412 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:08,420 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:08,422 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 19:04:08,422 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:04:08,829 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 19:04:08,830 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:08,832 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:08,833 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 19:04:08,833 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 19:04:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:08,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:08,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 34 [2020-12-22 19:04:08,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602552355] [2020-12-22 19:04:08,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 19:04:08,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:08,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 19:04:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:04:08,852 INFO L87 Difference]: Start difference. First operand 972 states and 1101 transitions. Second operand 34 states. [2020-12-22 19:04:12,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:12,537 INFO L93 Difference]: Finished difference Result 1479 states and 1647 transitions. [2020-12-22 19:04:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 19:04:12,537 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2020-12-22 19:04:12,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:12,542 INFO L225 Difference]: With dead ends: 1479 [2020-12-22 19:04:12,542 INFO L226 Difference]: Without dead ends: 1270 [2020-12-22 19:04:12,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=481, Invalid=3301, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 19:04:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2020-12-22 19:04:12,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1162. [2020-12-22 19:04:12,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-12-22 19:04:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1318 transitions. [2020-12-22 19:04:12,568 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1318 transitions. Word has length 66 [2020-12-22 19:04:12,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:12,569 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1318 transitions. [2020-12-22 19:04:12,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 19:04:12,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1318 transitions. [2020-12-22 19:04:12,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 19:04:12,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:12,572 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:12,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 19:04:12,787 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:04:12,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:12,788 INFO L82 PathProgramCache]: Analyzing trace with hash -200440626, now seen corresponding path program 8 times [2020-12-22 19:04:12,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:12,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890084642] [2020-12-22 19:04:12,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:13,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890084642] [2020-12-22 19:04:13,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752931717] [2020-12-22 19:04:13,325 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 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 19:04:13,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:04:13,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:13,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-22 19:04:13,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:13,456 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 19:04:13,458 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:13,463 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:13,463 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:13,464 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:04:13,790 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 19:04:13,791 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:13,801 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:13,802 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 19:04:13,802 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:04:13,886 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 19:04:13,888 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:13,901 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:13,903 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 19:04:13,903 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 19:04:15,180 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:15,181 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 19:04:15,184 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:04:15,206 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-22 19:04:15,209 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:15,209 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-22 19:04:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:15,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:15,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2020-12-22 19:04:15,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616862327] [2020-12-22 19:04:15,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 19:04:15,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:15,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 19:04:15,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:04:15,246 INFO L87 Difference]: Start difference. First operand 1162 states and 1318 transitions. Second operand 35 states. [2020-12-22 19:04:16,615 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 19:04:20,812 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-22 19:04:24,984 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:28,117 WARN L197 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:31,214 WARN L197 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-12-22 19:04:33,995 WARN L197 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:04:38,392 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-12-22 19:04:42,743 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41