/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/cstrspn-alloca-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 18:56:27,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 18:56:27,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 18:56:27,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 18:56:27,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 18:56:27,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 18:56:27,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 18:56:27,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 18:56:27,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 18:56:27,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 18:56:27,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 18:56:27,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 18:56:27,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 18:56:27,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 18:56:27,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 18:56:27,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 18:56:27,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 18:56:27,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 18:56:27,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 18:56:27,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 18:56:27,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 18:56:27,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 18:56:27,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 18:56:27,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 18:56:27,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 18:56:27,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 18:56:27,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 18:56:27,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 18:56:27,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 18:56:27,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 18:56:27,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 18:56:27,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 18:56:27,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 18:56:27,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 18:56:27,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 18:56:27,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 18:56:27,608 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 18:56:27,659 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 18:56:27,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 18:56:27,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 18:56:27,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 18:56:27,665 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 18:56:27,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 18:56:27,666 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 18:56:27,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 18:56:27,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 18:56:27,667 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 18:56:27,668 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 18:56:27,668 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 18:56:27,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 18:56:27,669 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 18:56:27,669 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 18:56:27,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 18:56:27,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 18:56:27,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 18:56:27,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 18:56:27,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 18:56:27,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 18:56:27,676 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 18:56:27,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 18:56:27,677 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 18:56:27,678 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 18:56:28,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 18:56:28,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 18:56:28,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 18:56:28,095 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 18:56:28,096 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 18:56:28,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2020-12-22 18:56:28,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0c4863dc/283c4bd461134c91bb4afcd714b05017/FLAGafe30edba [2020-12-22 18:56:29,018 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 18:56:29,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2020-12-22 18:56:29,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0c4863dc/283c4bd461134c91bb4afcd714b05017/FLAGafe30edba [2020-12-22 18:56:29,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0c4863dc/283c4bd461134c91bb4afcd714b05017 [2020-12-22 18:56:29,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 18:56:29,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 18:56:29,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 18:56:29,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 18:56:29,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 18:56:29,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:56:29" (1/1) ... [2020-12-22 18:56:29,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a93b284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:29, skipping insertion in model container [2020-12-22 18:56:29,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:56:29" (1/1) ... [2020-12-22 18:56:29,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 18:56:29,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 18:56:29,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 18:56:29,672 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 18:56:29,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 18:56:29,788 INFO L208 MainTranslator]: Completed translation [2020-12-22 18:56:29,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:29 WrapperNode [2020-12-22 18:56:29,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 18:56:29,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 18:56:29,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 18:56:29,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 18:56:29,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:29" (1/1) ... [2020-12-22 18:56:29,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:29" (1/1) ... [2020-12-22 18:56:29,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 18:56:29,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 18:56:29,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 18:56:29,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 18:56:29,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:29" (1/1) ... [2020-12-22 18:56:29,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:29" (1/1) ... [2020-12-22 18:56:29,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:29" (1/1) ... [2020-12-22 18:56:29,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:29" (1/1) ... [2020-12-22 18:56:29,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:29" (1/1) ... [2020-12-22 18:56:29,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:29" (1/1) ... [2020-12-22 18:56:29,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:29" (1/1) ... [2020-12-22 18:56:29,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 18:56:29,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 18:56:29,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 18:56:29,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 18:56:29,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:29" (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 18:56:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 18:56:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 18:56:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 18:56:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 18:56:30,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 18:56:30,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 18:56:30,679 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 18:56:30,680 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-22 18:56:30,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:56:30 BoogieIcfgContainer [2020-12-22 18:56:30,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 18:56:30,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 18:56:30,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 18:56:30,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 18:56:30,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:56:29" (1/3) ... [2020-12-22 18:56:30,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2262c1ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:56:30, skipping insertion in model container [2020-12-22 18:56:30,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:29" (2/3) ... [2020-12-22 18:56:30,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2262c1ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:56:30, skipping insertion in model container [2020-12-22 18:56:30,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:56:30" (3/3) ... [2020-12-22 18:56:30,698 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrspn-alloca-1.i [2020-12-22 18:56:30,705 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 18:56:30,710 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-12-22 18:56:30,731 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-12-22 18:56:30,756 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 18:56:30,756 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 18:56:30,757 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 18:56:30,757 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 18:56:30,757 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 18:56:30,757 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 18:56:30,757 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 18:56:30,758 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 18:56:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-12-22 18:56:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 18:56:30,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:30,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:30,785 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:30,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:30,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-12-22 18:56:30,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:30,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965438357] [2020-12-22 18:56:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:31,090 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 18:56:31,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965438357] [2020-12-22 18:56:31,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:31,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:56:31,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250057851] [2020-12-22 18:56:31,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:31,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:31,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:31,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:31,118 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2020-12-22 18:56:31,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:31,173 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-12-22 18:56:31,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:31,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 18:56:31,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:31,200 INFO L225 Difference]: With dead ends: 100 [2020-12-22 18:56:31,201 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 18:56:31,203 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 18:56:31,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 18:56:31,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2020-12-22 18:56:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 18:56:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-12-22 18:56:31,251 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2020-12-22 18:56:31,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:31,251 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-12-22 18:56:31,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:31,252 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-12-22 18:56:31,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 18:56:31,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:31,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:31,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 18:56:31,254 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:31,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2020-12-22 18:56:31,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:31,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788551096] [2020-12-22 18:56:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:31,376 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 18:56:31,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788551096] [2020-12-22 18:56:31,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:31,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 18:56:31,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801417701] [2020-12-22 18:56:31,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 18:56:31,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:31,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 18:56:31,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:56:31,384 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 3 states. [2020-12-22 18:56:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:31,439 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-12-22 18:56:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 18:56:31,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 18:56:31,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:31,441 INFO L225 Difference]: With dead ends: 53 [2020-12-22 18:56:31,442 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 18:56:31,442 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 18:56:31,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 18:56:31,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-22 18:56:31,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 18:56:31,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-12-22 18:56:31,449 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2020-12-22 18:56:31,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:31,450 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-12-22 18:56:31,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 18:56:31,450 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-12-22 18:56:31,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 18:56:31,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:31,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:31,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 18:56:31,451 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:31,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2020-12-22 18:56:31,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:31,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434226226] [2020-12-22 18:56:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:31,554 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 18:56:31,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434226226] [2020-12-22 18:56:31,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:31,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:31,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946341014] [2020-12-22 18:56:31,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:31,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:31,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:31,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:31,560 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 4 states. [2020-12-22 18:56:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:31,695 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2020-12-22 18:56:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:31,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 18:56:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:31,699 INFO L225 Difference]: With dead ends: 97 [2020-12-22 18:56:31,702 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 18:56:31,702 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 18:56:31,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 18:56:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2020-12-22 18:56:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 18:56:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-12-22 18:56:31,719 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2020-12-22 18:56:31,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:31,720 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-12-22 18:56:31,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:31,720 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-12-22 18:56:31,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 18:56:31,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:31,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:31,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 18:56:31,722 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:31,725 INFO L82 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2020-12-22 18:56:31,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:31,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125808275] [2020-12-22 18:56:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:31,811 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 18:56:31,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125808275] [2020-12-22 18:56:31,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:31,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:31,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736709955] [2020-12-22 18:56:31,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:31,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:31,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:31,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:31,815 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 4 states. [2020-12-22 18:56:31,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:31,857 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-12-22 18:56:31,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:31,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 18:56:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:31,859 INFO L225 Difference]: With dead ends: 54 [2020-12-22 18:56:31,859 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 18:56:31,860 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 18:56:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 18:56:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-22 18:56:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 18:56:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-12-22 18:56:31,866 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2020-12-22 18:56:31,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:31,867 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-12-22 18:56:31,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:31,867 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-12-22 18:56:31,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 18:56:31,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:31,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:31,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 18:56:31,868 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:31,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:31,869 INFO L82 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2020-12-22 18:56:31,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:31,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967680236] [2020-12-22 18:56:31,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:31,907 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 18:56:31,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967680236] [2020-12-22 18:56:31,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:31,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:56:31,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544623731] [2020-12-22 18:56:31,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:31,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:31,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:31,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:31,910 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 4 states. [2020-12-22 18:56:31,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:31,934 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-12-22 18:56:31,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:31,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 18:56:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:31,936 INFO L225 Difference]: With dead ends: 98 [2020-12-22 18:56:31,936 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 18:56:31,937 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 18:56:31,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 18:56:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2020-12-22 18:56:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 18:56:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-12-22 18:56:31,948 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2020-12-22 18:56:31,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:31,948 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-12-22 18:56:31,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:31,948 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-12-22 18:56:31,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 18:56:31,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:31,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:31,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 18:56:31,950 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:31,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:31,951 INFO L82 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2020-12-22 18:56:31,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:31,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950738714] [2020-12-22 18:56:31,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:31,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950738714] [2020-12-22 18:56:31,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:31,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 18:56:31,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291066204] [2020-12-22 18:56:31,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 18:56:31,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:31,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 18:56:31,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:56:31,984 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 3 states. [2020-12-22 18:56:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:32,016 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-12-22 18:56:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 18:56:32,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-22 18:56:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:32,018 INFO L225 Difference]: With dead ends: 63 [2020-12-22 18:56:32,018 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 18:56:32,019 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 18:56:32,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 18:56:32,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-22 18:56:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 18:56:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-12-22 18:56:32,026 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2020-12-22 18:56:32,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:32,026 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-12-22 18:56:32,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 18:56:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-12-22 18:56:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 18:56:32,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:32,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:32,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 18:56:32,028 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:32,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:32,028 INFO L82 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2020-12-22 18:56:32,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:32,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078140730] [2020-12-22 18:56:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:32,142 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 18:56:32,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078140730] [2020-12-22 18:56:32,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:32,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:56:32,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848021364] [2020-12-22 18:56:32,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:56:32,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:32,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:56:32,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:56:32,148 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 5 states. [2020-12-22 18:56:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:32,265 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2020-12-22 18:56:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:56:32,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 18:56:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:32,267 INFO L225 Difference]: With dead ends: 98 [2020-12-22 18:56:32,268 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 18:56:32,269 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 18:56:32,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 18:56:32,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2020-12-22 18:56:32,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 18:56:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-12-22 18:56:32,292 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2020-12-22 18:56:32,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:32,298 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-12-22 18:56:32,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:56:32,298 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-12-22 18:56:32,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 18:56:32,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:32,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:32,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 18:56:32,300 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:32,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:32,303 INFO L82 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2020-12-22 18:56:32,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:32,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124954974] [2020-12-22 18:56:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:32,420 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 18:56:32,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124954974] [2020-12-22 18:56:32,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:32,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:32,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962993055] [2020-12-22 18:56:32,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:32,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:32,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:32,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:32,427 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 4 states. [2020-12-22 18:56:32,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:32,487 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2020-12-22 18:56:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:32,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 18:56:32,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:32,488 INFO L225 Difference]: With dead ends: 64 [2020-12-22 18:56:32,488 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 18:56:32,489 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 18:56:32,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 18:56:32,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-22 18:56:32,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 18:56:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2020-12-22 18:56:32,499 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2020-12-22 18:56:32,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:32,500 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2020-12-22 18:56:32,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:32,500 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2020-12-22 18:56:32,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 18:56:32,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:32,502 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:32,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 18:56:32,503 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:32,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:32,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-12-22 18:56:32,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:32,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541818568] [2020-12-22 18:56:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:32,643 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 18:56:32,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541818568] [2020-12-22 18:56:32,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548003288] [2020-12-22 18:56:32,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:56:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:32,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 18:56:32,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:32,852 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_22|], 1=[|v_#valid_30|]} [2020-12-22 18:56:32,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:56:32,882 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 18:56:32,884 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:32,897 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:32,906 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 18:56:32,915 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:32,925 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:32,929 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 18:56:32,930 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 18:56:32,975 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 18:56:32,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:32,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 18:56:32,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978163428] [2020-12-22 18:56:32,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 18:56:32,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:32,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 18:56:32,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:56:32,978 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 6 states. [2020-12-22 18:56:33,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:33,123 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2020-12-22 18:56:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:56:33,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-22 18:56:33,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:33,125 INFO L225 Difference]: With dead ends: 107 [2020-12-22 18:56:33,125 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 18:56:33,125 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 18:56:33,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 18:56:33,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 59. [2020-12-22 18:56:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 18:56:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-12-22 18:56:33,130 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2020-12-22 18:56:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:33,130 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-12-22 18:56:33,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 18:56:33,131 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-12-22 18:56:33,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 18:56:33,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:33,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:33,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 18:56:33,347 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:33,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:33,349 INFO L82 PathProgramCache]: Analyzing trace with hash -464624131, now seen corresponding path program 1 times [2020-12-22 18:56:33,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:33,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164546353] [2020-12-22 18:56:33,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:33,386 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 18:56:33,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164546353] [2020-12-22 18:56:33,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:33,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:33,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145110190] [2020-12-22 18:56:33,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:33,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:33,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:33,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:33,389 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 4 states. [2020-12-22 18:56:33,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:33,457 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-12-22 18:56:33,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:33,460 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-22 18:56:33,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:33,461 INFO L225 Difference]: With dead ends: 57 [2020-12-22 18:56:33,461 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 18:56:33,461 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 18:56:33,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 18:56:33,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 18:56:33,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 18:56:33,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-12-22 18:56:33,470 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2020-12-22 18:56:33,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:33,472 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-12-22 18:56:33,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:33,472 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-12-22 18:56:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 18:56:33,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:33,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:33,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 18:56:33,474 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:33,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:33,475 INFO L82 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2020-12-22 18:56:33,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:33,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645033532] [2020-12-22 18:56:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:33,572 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 18:56:33,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645033532] [2020-12-22 18:56:33,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:33,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 18:56:33,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851133636] [2020-12-22 18:56:33,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 18:56:33,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:33,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 18:56:33,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:56:33,575 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 6 states. [2020-12-22 18:56:33,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:33,695 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-12-22 18:56:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:56:33,696 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-22 18:56:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:33,697 INFO L225 Difference]: With dead ends: 80 [2020-12-22 18:56:33,698 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 18:56:33,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 18:56:33,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 18:56:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2020-12-22 18:56:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 18:56:33,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-12-22 18:56:33,706 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 12 [2020-12-22 18:56:33,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:33,707 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-12-22 18:56:33,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 18:56:33,707 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-12-22 18:56:33,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 18:56:33,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:33,712 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:33,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 18:56:33,712 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:33,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:33,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2020-12-22 18:56:33,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:33,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399043369] [2020-12-22 18:56:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:33,858 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 18:56:33,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399043369] [2020-12-22 18:56:33,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454154032] [2020-12-22 18:56:33,876 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 18:56:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:33,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 18:56:33,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:34,005 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:34,006 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 18:56:34,015 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:34,043 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:56:34,049 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:34,049 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:56:34,119 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 18:56:34,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:34,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 18:56:34,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557032540] [2020-12-22 18:56:34,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 18:56:34,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:34,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 18:56:34,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:56:34,122 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 7 states. [2020-12-22 18:56:34,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:34,267 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-12-22 18:56:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 18:56:34,268 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-22 18:56:34,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:34,269 INFO L225 Difference]: With dead ends: 92 [2020-12-22 18:56:34,269 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 18:56:34,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 18:56:34,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 18:56:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 57. [2020-12-22 18:56:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 18:56:34,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-12-22 18:56:34,273 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2020-12-22 18:56:34,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:34,273 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-12-22 18:56:34,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 18:56:34,273 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-12-22 18:56:34,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 18:56:34,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:34,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:34,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 18:56:34,488 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:34,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1433224404, now seen corresponding path program 1 times [2020-12-22 18:56:34,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:34,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727089347] [2020-12-22 18:56:34,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:34,625 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 18:56:34,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727089347] [2020-12-22 18:56:34,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:34,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:34,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181839708] [2020-12-22 18:56:34,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:34,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:34,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:34,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:34,627 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 4 states. [2020-12-22 18:56:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:34,660 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-12-22 18:56:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:34,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-22 18:56:34,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:34,661 INFO L225 Difference]: With dead ends: 56 [2020-12-22 18:56:34,661 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 18:56:34,663 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 18:56:34,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 18:56:34,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-22 18:56:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 18:56:34,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-12-22 18:56:34,666 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2020-12-22 18:56:34,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:34,669 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-12-22 18:56:34,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:34,669 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-12-22 18:56:34,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 18:56:34,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:34,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:34,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 18:56:34,673 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:34,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:34,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1433207485, now seen corresponding path program 1 times [2020-12-22 18:56:34,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:34,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601752648] [2020-12-22 18:56:34,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:34,719 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 18:56:34,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601752648] [2020-12-22 18:56:34,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:34,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:56:34,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980108502] [2020-12-22 18:56:34,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:56:34,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:34,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:56:34,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:56:34,725 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 5 states. [2020-12-22 18:56:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:34,790 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-12-22 18:56:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:56:34,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-22 18:56:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:34,791 INFO L225 Difference]: With dead ends: 50 [2020-12-22 18:56:34,791 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 18:56:34,792 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 18:56:34,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 18:56:34,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-22 18:56:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 18:56:34,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-12-22 18:56:34,794 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2020-12-22 18:56:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:34,794 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-12-22 18:56:34,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:56:34,794 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-12-22 18:56:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 18:56:34,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:34,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:34,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 18:56:34,796 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:34,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1433207484, now seen corresponding path program 1 times [2020-12-22 18:56:34,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:34,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135646635] [2020-12-22 18:56:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:34,865 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 18:56:34,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135646635] [2020-12-22 18:56:34,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:34,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 18:56:34,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503060271] [2020-12-22 18:56:34,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 18:56:34,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:34,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 18:56:34,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:56:34,867 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 7 states. [2020-12-22 18:56:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:34,962 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-12-22 18:56:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 18:56:34,963 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-22 18:56:34,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:34,964 INFO L225 Difference]: With dead ends: 62 [2020-12-22 18:56:34,964 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 18:56:34,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 18:56:34,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 18:56:34,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-12-22 18:56:34,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 18:56:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-12-22 18:56:34,967 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 16 [2020-12-22 18:56:34,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:34,967 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-12-22 18:56:34,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 18:56:34,967 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-12-22 18:56:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 18:56:34,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:34,968 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 18:56:34,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 18:56:34,969 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:34,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:34,969 INFO L82 PathProgramCache]: Analyzing trace with hash 43271131, now seen corresponding path program 1 times [2020-12-22 18:56:34,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:34,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685338888] [2020-12-22 18:56:34,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:34,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685338888] [2020-12-22 18:56:34,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:34,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:34,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539123055] [2020-12-22 18:56:34,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 18:56:34,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:34,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 18:56:34,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:56:34,994 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 3 states. [2020-12-22 18:56:35,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:35,003 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-12-22 18:56:35,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 18:56:35,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 18:56:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:35,005 INFO L225 Difference]: With dead ends: 59 [2020-12-22 18:56:35,005 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 18:56:35,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:56:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 18:56:35,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-22 18:56:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 18:56:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-12-22 18:56:35,008 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 20 [2020-12-22 18:56:35,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:35,008 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-12-22 18:56:35,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 18:56:35,008 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-12-22 18:56:35,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 18:56:35,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:35,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:35,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 18:56:35,009 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:35,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:35,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1371974184, now seen corresponding path program 1 times [2020-12-22 18:56:35,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:35,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622309559] [2020-12-22 18:56:35,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:35,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622309559] [2020-12-22 18:56:35,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:35,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 18:56:35,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183901130] [2020-12-22 18:56:35,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 18:56:35,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:35,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 18:56:35,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:56:35,155 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 7 states. [2020-12-22 18:56:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:35,277 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-12-22 18:56:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 18:56:35,277 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-22 18:56:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:35,278 INFO L225 Difference]: With dead ends: 71 [2020-12-22 18:56:35,278 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 18:56:35,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 18:56:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 18:56:35,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-22 18:56:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 18:56:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-12-22 18:56:35,282 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 22 [2020-12-22 18:56:35,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:35,283 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-12-22 18:56:35,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 18:56:35,283 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-12-22 18:56:35,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 18:56:35,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:35,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:35,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 18:56:35,285 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:35,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2105344662, now seen corresponding path program 1 times [2020-12-22 18:56:35,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:35,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61722711] [2020-12-22 18:56:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:35,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61722711] [2020-12-22 18:56:35,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:35,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 18:56:35,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412062808] [2020-12-22 18:56:35,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 18:56:35,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:35,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 18:56:35,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 18:56:35,440 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 8 states. [2020-12-22 18:56:35,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:35,570 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-12-22 18:56:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 18:56:35,570 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-22 18:56:35,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:35,571 INFO L225 Difference]: With dead ends: 74 [2020-12-22 18:56:35,571 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 18:56:35,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 18:56:35,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 18:56:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-12-22 18:56:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 18:56:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-12-22 18:56:35,574 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 22 [2020-12-22 18:56:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:35,574 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-12-22 18:56:35,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 18:56:35,575 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-12-22 18:56:35,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 18:56:35,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:35,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:35,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 18:56:35,576 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:35,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:35,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1877695219, now seen corresponding path program 1 times [2020-12-22 18:56:35,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:35,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651942828] [2020-12-22 18:56:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:35,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651942828] [2020-12-22 18:56:35,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:35,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 18:56:35,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570272024] [2020-12-22 18:56:35,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 18:56:35,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:35,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 18:56:35,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 18:56:35,692 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 9 states. [2020-12-22 18:56:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:35,869 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-12-22 18:56:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 18:56:35,870 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-12-22 18:56:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:35,871 INFO L225 Difference]: With dead ends: 75 [2020-12-22 18:56:35,871 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 18:56:35,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-22 18:56:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 18:56:35,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-12-22 18:56:35,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 18:56:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-12-22 18:56:35,874 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 26 [2020-12-22 18:56:35,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:35,875 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-12-22 18:56:35,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 18:56:35,875 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-12-22 18:56:35,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 18:56:35,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:35,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:35,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 18:56:35,878 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:35,879 INFO L82 PathProgramCache]: Analyzing trace with hash 72256885, now seen corresponding path program 1 times [2020-12-22 18:56:35,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:35,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132659848] [2020-12-22 18:56:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:36,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132659848] [2020-12-22 18:56:36,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:36,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 18:56:36,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601977554] [2020-12-22 18:56:36,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 18:56:36,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:36,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 18:56:36,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-22 18:56:36,092 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 11 states. [2020-12-22 18:56:36,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:36,335 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2020-12-22 18:56:36,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 18:56:36,336 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-12-22 18:56:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:36,338 INFO L225 Difference]: With dead ends: 96 [2020-12-22 18:56:36,338 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 18:56:36,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-12-22 18:56:36,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 18:56:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-12-22 18:56:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 18:56:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2020-12-22 18:56:36,341 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 26 [2020-12-22 18:56:36,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:36,342 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2020-12-22 18:56:36,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 18:56:36,342 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2020-12-22 18:56:36,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 18:56:36,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:36,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:36,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 18:56:36,343 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:36,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:36,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1740534735, now seen corresponding path program 1 times [2020-12-22 18:56:36,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:36,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465821027] [2020-12-22 18:56:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:36,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465821027] [2020-12-22 18:56:36,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:36,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 18:56:36,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684513946] [2020-12-22 18:56:36,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 18:56:36,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:36,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 18:56:36,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 18:56:36,456 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand 10 states. [2020-12-22 18:56:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:36,698 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2020-12-22 18:56:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 18:56:36,699 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-12-22 18:56:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:36,700 INFO L225 Difference]: With dead ends: 75 [2020-12-22 18:56:36,700 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 18:56:36,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-12-22 18:56:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 18:56:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-12-22 18:56:36,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 18:56:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-12-22 18:56:36,702 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 27 [2020-12-22 18:56:36,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:36,703 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-12-22 18:56:36,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 18:56:36,703 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-12-22 18:56:36,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 18:56:36,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:36,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:36,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 18:56:36,704 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:36,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:36,705 INFO L82 PathProgramCache]: Analyzing trace with hash -145898734, now seen corresponding path program 1 times [2020-12-22 18:56:36,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:36,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782768967] [2020-12-22 18:56:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:36,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782768967] [2020-12-22 18:56:36,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643991206] [2020-12-22 18:56:36,877 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 18:56:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:36,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 18:56:36,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:37,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:37,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-12-22 18:56:37,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276071099] [2020-12-22 18:56:37,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 18:56:37,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 18:56:37,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-12-22 18:56:37,088 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 16 states. [2020-12-22 18:56:37,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:37,311 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-12-22 18:56:37,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 18:56:37,311 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-22 18:56:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:37,312 INFO L225 Difference]: With dead ends: 71 [2020-12-22 18:56:37,312 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 18:56:37,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-12-22 18:56:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 18:56:37,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-12-22 18:56:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 18:56:37,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-12-22 18:56:37,316 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 30 [2020-12-22 18:56:37,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:37,316 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-12-22 18:56:37,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 18:56:37,316 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-12-22 18:56:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 18:56:37,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:37,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:37,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 18:56:37,532 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:37,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:37,533 INFO L82 PathProgramCache]: Analyzing trace with hash 36573013, now seen corresponding path program 1 times [2020-12-22 18:56:37,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:37,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453744000] [2020-12-22 18:56:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:37,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453744000] [2020-12-22 18:56:37,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993285696] [2020-12-22 18:56:37,641 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 18:56:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:37,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 18:56:37,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:37,745 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_24|], 1=[|v_#valid_31|]} [2020-12-22 18:56:37,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:56:37,749 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 18:56:37,750 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:37,759 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:37,764 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 18:56:37,766 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:37,774 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:37,778 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 18:56:37,779 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 18:56:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:37,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:37,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-22 18:56:37,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345982930] [2020-12-22 18:56:37,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 18:56:37,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:37,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 18:56:37,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-12-22 18:56:37,897 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 12 states. [2020-12-22 18:56:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:38,118 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2020-12-22 18:56:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 18:56:38,118 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-12-22 18:56:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:38,119 INFO L225 Difference]: With dead ends: 117 [2020-12-22 18:56:38,119 INFO L226 Difference]: Without dead ends: 117 [2020-12-22 18:56:38,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-22 18:56:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-22 18:56:38,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 81. [2020-12-22 18:56:38,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 18:56:38,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-12-22 18:56:38,123 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 33 [2020-12-22 18:56:38,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:38,123 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-12-22 18:56:38,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 18:56:38,124 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-12-22 18:56:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 18:56:38,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:38,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:38,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:38,340 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:38,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:38,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1001387738, now seen corresponding path program 2 times [2020-12-22 18:56:38,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:38,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69948654] [2020-12-22 18:56:38,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:38,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69948654] [2020-12-22 18:56:38,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453061167] [2020-12-22 18:56:38,603 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 18:56:38,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:56:38,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:38,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 18:56:38,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:38,798 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 18:56:38,799 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:38,805 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:38,808 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 18:56:38,808 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:56:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:39,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:39,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-12-22 18:56:39,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139158836] [2020-12-22 18:56:39,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 18:56:39,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:39,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 18:56:39,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-12-22 18:56:39,132 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 23 states. [2020-12-22 18:56:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:39,777 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2020-12-22 18:56:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 18:56:39,778 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 36 [2020-12-22 18:56:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:39,779 INFO L225 Difference]: With dead ends: 128 [2020-12-22 18:56:39,779 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 18:56:39,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 18:56:39,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 18:56:39,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2020-12-22 18:56:39,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 18:56:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2020-12-22 18:56:39,783 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 36 [2020-12-22 18:56:39,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:39,783 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2020-12-22 18:56:39,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 18:56:39,783 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2020-12-22 18:56:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 18:56:39,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:39,784 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:39,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 18:56:39,999 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:39,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:40,000 INFO L82 PathProgramCache]: Analyzing trace with hash -304963965, now seen corresponding path program 3 times [2020-12-22 18:56:40,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:40,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187218603] [2020-12-22 18:56:40,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:40,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187218603] [2020-12-22 18:56:40,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518802235] [2020-12-22 18:56:40,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:40,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 18:56:40,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 18:56:40,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:40,260 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:40,261 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 18:56:40,266 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:40,283 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:56:40,285 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 18:56:40,286 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:56:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:40,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:40,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2020-12-22 18:56:40,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427115013] [2020-12-22 18:56:40,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 18:56:40,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:40,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 18:56:40,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-12-22 18:56:40,508 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand 20 states. [2020-12-22 18:56:40,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:40,978 INFO L93 Difference]: Finished difference Result 164 states and 181 transitions. [2020-12-22 18:56:40,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 18:56:40,979 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-12-22 18:56:40,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:40,982 INFO L225 Difference]: With dead ends: 164 [2020-12-22 18:56:40,982 INFO L226 Difference]: Without dead ends: 162 [2020-12-22 18:56:40,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2020-12-22 18:56:40,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-22 18:56:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 129. [2020-12-22 18:56:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-22 18:56:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2020-12-22 18:56:40,989 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 40 [2020-12-22 18:56:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:40,989 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2020-12-22 18:56:40,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 18:56:40,990 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2020-12-22 18:56:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 18:56:40,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:40,990 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:41,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:41,204 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:41,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:41,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1930803928, now seen corresponding path program 2 times [2020-12-22 18:56:41,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:41,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61858148] [2020-12-22 18:56:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:41,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61858148] [2020-12-22 18:56:41,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890599533] [2020-12-22 18:56:41,495 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 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 18:56:41,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:56:41,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:41,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 18:56:41,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:41,601 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 18:56:41,603 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:41,607 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:41,607 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:41,608 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 18:56:41,703 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 18:56:41,706 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:41,714 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:41,716 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 18:56:41,716 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 18:56:41,753 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 18:56:41,755 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:41,765 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:41,767 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 18:56:41,767 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:31 [2020-12-22 18:56:42,280 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2020-12-22 18:56:42,988 INFO L348 Elim1Store]: treesize reduction 10, result has 78.3 percent of original size [2020-12-22 18:56:42,989 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 55 [2020-12-22 18:56:42,992 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:43,015 INFO L625 ElimStorePlain]: treesize reduction 9, result has 71.0 percent of original size [2020-12-22 18:56:43,018 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 18:56:43,018 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:8 [2020-12-22 18:56:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:43,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:43,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 22] total 30 [2020-12-22 18:56:43,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190083808] [2020-12-22 18:56:43,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 18:56:43,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:43,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 18:56:43,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-12-22 18:56:43,094 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand 30 states. [2020-12-22 18:56:44,644 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-12-22 18:56:44,863 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2020-12-22 18:56:45,085 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-12-22 18:56:45,254 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-12-22 18:56:45,469 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-12-22 18:56:45,678 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-12-22 18:56:45,885 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-12-22 18:56:46,074 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-12-22 18:56:46,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:46,410 INFO L93 Difference]: Finished difference Result 211 states and 234 transitions. [2020-12-22 18:56:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 18:56:46,411 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 46 [2020-12-22 18:56:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:46,412 INFO L225 Difference]: With dead ends: 211 [2020-12-22 18:56:46,412 INFO L226 Difference]: Without dead ends: 183 [2020-12-22 18:56:46,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=465, Invalid=2085, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 18:56:46,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-22 18:56:46,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 174. [2020-12-22 18:56:46,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-22 18:56:46,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 198 transitions. [2020-12-22 18:56:46,419 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 198 transitions. Word has length 46 [2020-12-22 18:56:46,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:46,419 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 198 transitions. [2020-12-22 18:56:46,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 18:56:46,419 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 198 transitions. [2020-12-22 18:56:46,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 18:56:46,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:46,420 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:46,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 18:56:46,634 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:46,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:46,635 INFO L82 PathProgramCache]: Analyzing trace with hash 371510231, now seen corresponding path program 4 times [2020-12-22 18:56:46,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:46,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044608970] [2020-12-22 18:56:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:47,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044608970] [2020-12-22 18:56:47,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349393674] [2020-12-22 18:56:47,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:47,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:56:47,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:47,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 18:56:47,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:47,493 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:47,493 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 18:56:47,497 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:47,521 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:56:47,523 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 18:56:47,524 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:56:47,738 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 18:56:47,739 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:47,743 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:47,744 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:47,744 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-22 18:56:48,015 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2020-12-22 18:56:48,018 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:56:48,029 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:48,034 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 18:56:48,037 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:48,037 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2020-12-22 18:56:48,038 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:48,046 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:48,048 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:48,049 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2020-12-22 18:56:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:48,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:48,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 30 [2020-12-22 18:56:48,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494167742] [2020-12-22 18:56:48,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 18:56:48,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:48,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 18:56:48,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2020-12-22 18:56:48,067 INFO L87 Difference]: Start difference. First operand 174 states and 198 transitions. Second operand 30 states. [2020-12-22 18:56:48,713 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 18:56:49,714 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 18:56:50,465 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-12-22 18:56:50,827 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 18:56:50,995 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-12-22 18:56:51,161 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-22 18:56:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:51,855 INFO L93 Difference]: Finished difference Result 283 states and 305 transitions. [2020-12-22 18:56:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 18:56:51,856 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 46 [2020-12-22 18:56:51,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:51,858 INFO L225 Difference]: With dead ends: 283 [2020-12-22 18:56:51,858 INFO L226 Difference]: Without dead ends: 255 [2020-12-22 18:56:51,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=579, Invalid=3203, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 18:56:51,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-22 18:56:51,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 226. [2020-12-22 18:56:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-22 18:56:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 255 transitions. [2020-12-22 18:56:51,867 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 255 transitions. Word has length 46 [2020-12-22 18:56:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:51,867 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 255 transitions. [2020-12-22 18:56:51,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 18:56:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 255 transitions. [2020-12-22 18:56:51,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 18:56:51,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:51,868 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:52,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 18:56:52,082 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:52,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:52,083 INFO L82 PathProgramCache]: Analyzing trace with hash -129625868, now seen corresponding path program 5 times [2020-12-22 18:56:52,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:52,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926789364] [2020-12-22 18:56:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:52,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926789364] [2020-12-22 18:56:52,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461931048] [2020-12-22 18:56:52,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:52,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 18:56:52,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:52,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 18:56:52,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:52,389 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:52,389 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 18:56:52,390 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:52,409 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:56:52,411 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 18:56:52,411 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:56:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:52,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:52,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2020-12-22 18:56:52,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610399317] [2020-12-22 18:56:52,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 18:56:52,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:52,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 18:56:52,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-12-22 18:56:52,728 INFO L87 Difference]: Start difference. First operand 226 states and 255 transitions. Second operand 24 states. [2020-12-22 18:56:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:53,660 INFO L93 Difference]: Finished difference Result 292 states and 322 transitions. [2020-12-22 18:56:53,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 18:56:53,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2020-12-22 18:56:53,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:53,663 INFO L225 Difference]: With dead ends: 292 [2020-12-22 18:56:53,663 INFO L226 Difference]: Without dead ends: 290 [2020-12-22 18:56:53,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-12-22 18:56:53,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-12-22 18:56:53,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 244. [2020-12-22 18:56:53,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-12-22 18:56:53,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 275 transitions. [2020-12-22 18:56:53,671 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 275 transitions. Word has length 50 [2020-12-22 18:56:53,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:53,672 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 275 transitions. [2020-12-22 18:56:53,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 18:56:53,672 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 275 transitions. [2020-12-22 18:56:53,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 18:56:53,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:53,673 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:53,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 18:56:53,888 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:53,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:53,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1006205749, now seen corresponding path program 3 times [2020-12-22 18:56:53,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:53,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908479567] [2020-12-22 18:56:53,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:54,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908479567] [2020-12-22 18:56:54,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936442011] [2020-12-22 18:56:54,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:54,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 18:56:54,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:54,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 18:56:54,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:54,132 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_29|], 1=[|v_#valid_33|]} [2020-12-22 18:56:54,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:56:54,137 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 18:56:54,138 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:54,149 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:54,154 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 18:56:54,160 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:54,171 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:54,172 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:54,173 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:24 [2020-12-22 18:56:54,256 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 18:56:54,257 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:54,269 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:54,270 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:54,270 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-12-22 18:56:54,317 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 18:56:54,319 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:54,329 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:54,330 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 18:56:54,330 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:36 [2020-12-22 18:56:55,058 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:55,059 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 75 [2020-12-22 18:56:55,062 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:55,099 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:55,102 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 18:56:55,103 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:56:55,105 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:56:55,110 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:56:55,114 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:56:55,115 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:56:55,117 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 18:56:55,120 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:55,120 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:66, output treesize:41 [2020-12-22 18:56:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 18:56:55,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:55,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 22 [2020-12-22 18:56:55,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508544037] [2020-12-22 18:56:55,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 18:56:55,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 18:56:55,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-12-22 18:56:55,324 INFO L87 Difference]: Start difference. First operand 244 states and 275 transitions. Second operand 23 states. [2020-12-22 18:56:56,333 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-12-22 18:56:56,759 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-12-22 18:56:57,007 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-12-22 18:56:57,360 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-12-22 18:56:57,661 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-12-22 18:56:57,842 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-12-22 18:56:58,102 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-12-22 18:56:58,259 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-12-22 18:56:58,472 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-12-22 18:56:58,646 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2020-12-22 18:56:58,856 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-12-22 18:56:59,004 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-12-22 18:56:59,199 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-12-22 18:56:59,363 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-12-22 18:56:59,532 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-12-22 18:56:59,795 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-12-22 18:57:00,012 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-12-22 18:57:00,218 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-12-22 18:57:00,388 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-12-22 18:57:00,579 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-12-22 18:57:01,053 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-12-22 18:57:01,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:01,273 INFO L93 Difference]: Finished difference Result 399 states and 435 transitions. [2020-12-22 18:57:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 18:57:01,274 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-12-22 18:57:01,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:01,276 INFO L225 Difference]: With dead ends: 399 [2020-12-22 18:57:01,276 INFO L226 Difference]: Without dead ends: 399 [2020-12-22 18:57:01,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=727, Invalid=2579, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 18:57:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-12-22 18:57:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 314. [2020-12-22 18:57:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-12-22 18:57:01,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 355 transitions. [2020-12-22 18:57:01,286 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 355 transitions. Word has length 50 [2020-12-22 18:57:01,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:01,287 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 355 transitions. [2020-12-22 18:57:01,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 18:57:01,287 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 355 transitions. [2020-12-22 18:57:01,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 18:57:01,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:01,288 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:01,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 18:57:01,503 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:01,504 INFO L82 PathProgramCache]: Analyzing trace with hash 509273480, now seen corresponding path program 6 times [2020-12-22 18:57:01,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:01,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128822926] [2020-12-22 18:57:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:57:01,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128822926] [2020-12-22 18:57:01,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497516705] [2020-12-22 18:57:01,754 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 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 18:57:01,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 18:57:01,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:01,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 18:57:01,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:01,904 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:01,904 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 18:57:01,905 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:01,923 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:57:01,925 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 18:57:01,926 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:57:02,123 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 18:57:02,124 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:02,129 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:02,129 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:02,130 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-22 18:57:02,328 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2020-12-22 18:57:02,330 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:57:02,340 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:02,342 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:57:02,342 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:28 [2020-12-22 18:57:02,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:57:02,654 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:02,655 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 3 case distinctions, treesize of input 27 treesize of output 33 [2020-12-22 18:57:02,656 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:57:02,658 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:02,680 INFO L625 ElimStorePlain]: treesize reduction 7, result has 70.8 percent of original size [2020-12-22 18:57:02,682 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:02,683 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:36, output treesize:3 [2020-12-22 18:57:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:57:02,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:02,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 33 [2020-12-22 18:57:02,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138700285] [2020-12-22 18:57:02,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 18:57:02,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:02,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 18:57:02,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 18:57:02,705 INFO L87 Difference]: Start difference. First operand 314 states and 355 transitions. Second operand 33 states. [2020-12-22 18:57:05,403 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 18:57:05,676 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-12-22 18:57:05,904 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 18:57:06,141 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 18:57:06,352 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 18:57:06,548 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-12-22 18:57:06,774 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-12-22 18:57:06,968 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-12-22 18:57:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:07,317 INFO L93 Difference]: Finished difference Result 500 states and 544 transitions. [2020-12-22 18:57:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 18:57:07,318 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 56 [2020-12-22 18:57:07,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:07,321 INFO L225 Difference]: With dead ends: 500 [2020-12-22 18:57:07,321 INFO L226 Difference]: Without dead ends: 463 [2020-12-22 18:57:07,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=594, Invalid=3438, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 18:57:07,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-12-22 18:57:07,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 403. [2020-12-22 18:57:07,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-12-22 18:57:07,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 453 transitions. [2020-12-22 18:57:07,333 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 453 transitions. Word has length 56 [2020-12-22 18:57:07,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:07,333 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 453 transitions. [2020-12-22 18:57:07,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 18:57:07,333 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 453 transitions. [2020-12-22 18:57:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 18:57:07,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:07,334 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:07,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:07,550 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:07,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:07,551 INFO L82 PathProgramCache]: Analyzing trace with hash 223488613, now seen corresponding path program 7 times [2020-12-22 18:57:07,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:07,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021604171] [2020-12-22 18:57:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:57:07,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021604171] [2020-12-22 18:57:07,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331545160] [2020-12-22 18:57:07,780 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 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 18:57:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:07,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 18:57:07,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:57:08,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:08,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2020-12-22 18:57:08,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680864613] [2020-12-22 18:57:08,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 18:57:08,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:08,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 18:57:08,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-12-22 18:57:08,144 INFO L87 Difference]: Start difference. First operand 403 states and 453 transitions. Second operand 24 states. [2020-12-22 18:57:09,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:09,047 INFO L93 Difference]: Finished difference Result 512 states and 563 transitions. [2020-12-22 18:57:09,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 18:57:09,048 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 60 [2020-12-22 18:57:09,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:09,051 INFO L225 Difference]: With dead ends: 512 [2020-12-22 18:57:09,051 INFO L226 Difference]: Without dead ends: 510 [2020-12-22 18:57:09,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2020-12-22 18:57:09,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-12-22 18:57:09,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 427. [2020-12-22 18:57:09,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-12-22 18:57:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 480 transitions. [2020-12-22 18:57:09,064 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 480 transitions. Word has length 60 [2020-12-22 18:57:09,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:09,065 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 480 transitions. [2020-12-22 18:57:09,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 18:57:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 480 transitions. [2020-12-22 18:57:09,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 18:57:09,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:09,066 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:09,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:09,280 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:09,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:09,281 INFO L82 PathProgramCache]: Analyzing trace with hash 276863736, now seen corresponding path program 4 times [2020-12-22 18:57:09,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:09,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408153182] [2020-12-22 18:57:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:10,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408153182] [2020-12-22 18:57:10,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756892668] [2020-12-22 18:57:10,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:10,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:57:10,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:10,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 18:57:10,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:10,358 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_31|], 1=[|v_#valid_34|]} [2020-12-22 18:57:10,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:57:10,364 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 18:57:10,365 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:10,374 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:10,379 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 18:57:10,381 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:10,390 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:10,391 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:10,391 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-12-22 18:57:10,665 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 18:57:10,666 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:10,675 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:10,676 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:10,676 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-22 18:57:10,739 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 18:57:10,740 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:10,750 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:10,751 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 18:57:10,752 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2020-12-22 18:57:11,303 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 18:57:11,306 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 18:57:11,319 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:11,321 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 18:57:11,321 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:35 [2020-12-22 18:57:13,930 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 18:57:14,125 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 18:57:14,140 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:14,140 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2020-12-22 18:57:14,142 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:14,167 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:14,173 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:14,173 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:57, output treesize:8 [2020-12-22 18:57:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:57:14,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:14,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 43 [2020-12-22 18:57:14,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975334544] [2020-12-22 18:57:14,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 18:57:14,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:14,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 18:57:14,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1696, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 18:57:14,282 INFO L87 Difference]: Start difference. First operand 427 states and 480 transitions. Second operand 43 states. [2020-12-22 18:57:16,136 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-12-22 18:57:16,880 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-22 18:57:18,006 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-12-22 18:57:18,320 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-12-22 18:57:20,588 WARN L197 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-12-22 18:57:21,565 WARN L197 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-12-22 18:57:22,010 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-12-22 18:57:22,263 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-22 18:57:24,864 WARN L197 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-12-22 18:57:27,163 WARN L197 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-12-22 18:57:27,410 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-12-22 18:57:27,695 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-12-22 18:57:30,042 WARN L197 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2020-12-22 18:57:32,348 WARN L197 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2020-12-22 18:57:32,554 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-22 18:57:32,852 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 77 [2020-12-22 18:57:37,244 WARN L197 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-12-22 18:57:37,709 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2020-12-22 18:57:38,074 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-12-22 18:57:39,767 WARN L197 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-12-22 18:57:40,727 WARN L197 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 18:57:46,986 WARN L197 SmtUtils]: Spent 6.08 s on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2020-12-22 18:57:49,288 WARN L197 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2020-12-22 18:57:49,896 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-12-22 18:57:50,513 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-12-22 18:57:51,498 WARN L197 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-12-22 18:57:54,833 WARN L197 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2020-12-22 18:57:55,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:55,974 INFO L93 Difference]: Finished difference Result 784 states and 864 transitions. [2020-12-22 18:57:55,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 18:57:55,974 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 63 [2020-12-22 18:57:55,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:55,979 INFO L225 Difference]: With dead ends: 784 [2020-12-22 18:57:55,979 INFO L226 Difference]: Without dead ends: 605 [2020-12-22 18:57:55,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=1147, Invalid=6509, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 18:57:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2020-12-22 18:57:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 540. [2020-12-22 18:57:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-12-22 18:57:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 615 transitions. [2020-12-22 18:57:55,993 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 615 transitions. Word has length 63 [2020-12-22 18:57:55,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:55,994 INFO L481 AbstractCegarLoop]: Abstraction has 540 states and 615 transitions. [2020-12-22 18:57:55,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 18:57:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 615 transitions. [2020-12-22 18:57:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 18:57:55,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:55,995 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:56,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 18:57:56,209 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:56,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:56,210 INFO L82 PathProgramCache]: Analyzing trace with hash 265315897, now seen corresponding path program 8 times [2020-12-22 18:57:56,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:56,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696273043] [2020-12-22 18:57:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:57:56,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696273043] [2020-12-22 18:57:56,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520722618] [2020-12-22 18:57:56,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:57:56,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:57:56,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:56,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 18:57:56,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:56,871 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 18:57:56,872 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:56,880 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:56,882 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 18:57:56,882 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 18:57:57,561 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:57,561 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-12-22 18:57:57,563 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 18:57:57,580 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:57,582 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 18:57:57,584 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 18:57:57,586 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 18:57:57,586 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2020-12-22 18:57:57,655 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:57:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:57:57,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:57,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2020-12-22 18:57:57,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987872741] [2020-12-22 18:57:57,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 18:57:57,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:57,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 18:57:57,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 18:57:57,877 INFO L87 Difference]: Start difference. First operand 540 states and 615 transitions. Second operand 36 states. [2020-12-22 18:57:59,210 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-12-22 18:58:06,863 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-22 18:58:08,173 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-12-22 18:58:10,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:10,018 INFO L93 Difference]: Finished difference Result 1186 states and 1298 transitions. [2020-12-22 18:58:10,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 18:58:10,019 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 66 [2020-12-22 18:58:10,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:10,024 INFO L225 Difference]: With dead ends: 1186 [2020-12-22 18:58:10,024 INFO L226 Difference]: Without dead ends: 1038 [2020-12-22 18:58:10,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=552, Invalid=3354, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 18:58:10,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2020-12-22 18:58:10,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 739. [2020-12-22 18:58:10,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2020-12-22 18:58:10,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 836 transitions. [2020-12-22 18:58:10,046 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 836 transitions. Word has length 66 [2020-12-22 18:58:10,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:10,046 INFO L481 AbstractCegarLoop]: Abstraction has 739 states and 836 transitions. [2020-12-22 18:58:10,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 18:58:10,046 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 836 transitions. [2020-12-22 18:58:10,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 18:58:10,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:10,048 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:10,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:10,262 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:58:10,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:10,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1668022213, now seen corresponding path program 5 times [2020-12-22 18:58:10,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:10,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959861537] [2020-12-22 18:58:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:58:10,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959861537] [2020-12-22 18:58:10,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550319119] [2020-12-22 18:58:10,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:10,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 18:58:10,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:10,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 18:58:10,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:10,570 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_32|], 1=[|v_#valid_35|]} [2020-12-22 18:58:10,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:58:10,575 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 18:58:10,576 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:10,587 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:10,595 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 18:58:10,597 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:10,609 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:10,611 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 18:58:10,611 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 18:58:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:58:10,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:10,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2020-12-22 18:58:10,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233334356] [2020-12-22 18:58:10,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 18:58:10,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:10,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 18:58:10,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-12-22 18:58:10,979 INFO L87 Difference]: Start difference. First operand 739 states and 836 transitions. Second operand 20 states. [2020-12-22 18:58:12,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:12,019 INFO L93 Difference]: Finished difference Result 1099 states and 1218 transitions. [2020-12-22 18:58:12,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 18:58:12,020 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-12-22 18:58:12,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:12,025 INFO L225 Difference]: With dead ends: 1099 [2020-12-22 18:58:12,025 INFO L226 Difference]: Without dead ends: 1099 [2020-12-22 18:58:12,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-12-22 18:58:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2020-12-22 18:58:12,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 890. [2020-12-22 18:58:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2020-12-22 18:58:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1005 transitions. [2020-12-22 18:58:12,052 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1005 transitions. Word has length 67 [2020-12-22 18:58:12,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:12,053 INFO L481 AbstractCegarLoop]: Abstraction has 890 states and 1005 transitions. [2020-12-22 18:58:12,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 18:58:12,053 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1005 transitions. [2020-12-22 18:58:12,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 18:58:12,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:12,055 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:12,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 18:58:12,269 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:58:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:12,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2092129770, now seen corresponding path program 9 times [2020-12-22 18:58:12,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:12,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538174933] [2020-12-22 18:58:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:58:12,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538174933] [2020-12-22 18:58:12,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463253083] [2020-12-22 18:58:12,718 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 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 18:58:12,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 18:58:12,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:12,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 18:58:12,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:13,200 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 18:58:13,202 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:13,209 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:13,211 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 18:58:13,211 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:58:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:58:13,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:13,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 34 [2020-12-22 18:58:13,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671741799] [2020-12-22 18:58:13,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 18:58:13,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:13,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 18:58:13,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 18:58:13,621 INFO L87 Difference]: Start difference. First operand 890 states and 1005 transitions. Second operand 34 states. [2020-12-22 18:58:16,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:16,224 INFO L93 Difference]: Finished difference Result 1556 states and 1715 transitions. [2020-12-22 18:58:16,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 18:58:16,225 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-12-22 18:58:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:16,229 INFO L225 Difference]: With dead ends: 1556 [2020-12-22 18:58:16,229 INFO L226 Difference]: Without dead ends: 1488 [2020-12-22 18:58:16,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 18:58:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2020-12-22 18:58:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1324. [2020-12-22 18:58:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1324 states. [2020-12-22 18:58:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1488 transitions. [2020-12-22 18:58:16,258 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1488 transitions. Word has length 76 [2020-12-22 18:58:16,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:16,259 INFO L481 AbstractCegarLoop]: Abstraction has 1324 states and 1488 transitions. [2020-12-22 18:58:16,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 18:58:16,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1488 transitions. [2020-12-22 18:58:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 18:58:16,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:16,261 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:16,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:16,476 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:58:16,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:16,477 INFO L82 PathProgramCache]: Analyzing trace with hash -882077113, now seen corresponding path program 10 times [2020-12-22 18:58:16,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:16,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728601941] [2020-12-22 18:58:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:58:16,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728601941] [2020-12-22 18:58:16,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365901355] [2020-12-22 18:58:16,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:16,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:58:16,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:16,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 18:58:16,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:17,018 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:17,018 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 18:58:17,020 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:17,041 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:58:17,044 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 18:58:17,044 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:58:17,177 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 18:58:17,177 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:17,186 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:17,186 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:17,187 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-22 18:58:17,724 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:17,725 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-22 18:58:17,727 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 18:58:17,742 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:17,743 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:17,743 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-22 18:58:17,819 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:58:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 50 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:58:18,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:18,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 33 [2020-12-22 18:58:18,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534146809] [2020-12-22 18:58:18,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 18:58:18,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:18,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 18:58:18,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 18:58:18,072 INFO L87 Difference]: Start difference. First operand 1324 states and 1488 transitions. Second operand 34 states. [2020-12-22 18:58:22,131 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-22 18:58:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:23,558 INFO L93 Difference]: Finished difference Result 1894 states and 2086 transitions. [2020-12-22 18:58:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 18:58:23,559 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 80 [2020-12-22 18:58:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:23,564 INFO L225 Difference]: With dead ends: 1894 [2020-12-22 18:58:23,564 INFO L226 Difference]: Without dead ends: 1702 [2020-12-22 18:58:23,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=539, Invalid=2653, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 18:58:23,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2020-12-22 18:58:23,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1033. [2020-12-22 18:58:23,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1033 states. [2020-12-22 18:58:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1167 transitions. [2020-12-22 18:58:23,593 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1167 transitions. Word has length 80 [2020-12-22 18:58:23,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:23,593 INFO L481 AbstractCegarLoop]: Abstraction has 1033 states and 1167 transitions. [2020-12-22 18:58:23,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 18:58:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1167 transitions. [2020-12-22 18:58:23,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 18:58:23,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:23,595 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:23,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 18:58:23,809 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:58:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:23,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2132340658, now seen corresponding path program 6 times [2020-12-22 18:58:23,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:23,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150946575] [2020-12-22 18:58:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:58:24,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150946575] [2020-12-22 18:58:24,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416293147] [2020-12-22 18:58:24,611 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 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 18:58:24,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 18:58:24,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:24,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 18:58:24,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:24,776 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 18:58:24,777 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:24,783 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:24,784 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:24,785 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 18:58:25,127 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 18:58:25,128 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:25,139 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:25,141 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 18:58:25,141 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 18:58:25,230 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 18:58:25,231 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:25,243 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:25,245 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 18:58:25,245 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 18:58:27,274 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 18:58:27,275 INFO L348 Elim1Store]: treesize reduction 10, result has 89.0 percent of original size [2020-12-22 18:58:27,275 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 53 treesize of output 101 [2020-12-22 18:58:27,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 18:58:27,282 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 18:58:27,290 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:27,361 INFO L625 ElimStorePlain]: treesize reduction 17, result has 73.8 percent of original size [2020-12-22 18:58:27,366 INFO L547 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:27,366 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:63, output treesize:8 [2020-12-22 18:58:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 19 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:58:27,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:27,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2020-12-22 18:58:27,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155134876] [2020-12-22 18:58:27,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 18:58:27,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:27,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 18:58:27,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1701, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 18:58:27,513 INFO L87 Difference]: Start difference. First operand 1033 states and 1167 transitions. Second operand 43 states. [2020-12-22 18:58:33,408 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-12-22 18:58:37,729 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-12-22 18:58:42,127 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-12-22 18:58:42,408 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-22 18:58:46,632 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-12-22 18:58:50,948 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-12-22 18:58:55,555 WARN L197 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-12-22 18:58:59,839 WARN L197 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-12-22 18:59:01,548 WARN L197 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-12-22 18:59:03,513 WARN L197 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-12-22 18:59:07,940 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-12-22 18:59:12,170 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 18:59:13,108 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-12-22 18:59:13,553 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-12-22 18:59:17,843 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 18:59:18,389 WARN L197 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-12-22 18:59:21,311 WARN L197 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 18:59:25,607 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 18:59:28,400 WARN L197 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-22 18:59:33,015 WARN L197 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-22 18:59:37,428 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-12-22 18:59:39,987 WARN L197 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-12-22 18:59:40,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:40,319 INFO L93 Difference]: Finished difference Result 1924 states and 2122 transitions. [2020-12-22 18:59:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 18:59:40,320 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 80 [2020-12-22 18:59:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:40,327 INFO L225 Difference]: With dead ends: 1924 [2020-12-22 18:59:40,327 INFO L226 Difference]: Without dead ends: 1382 [2020-12-22 18:59:40,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 70.8s TimeCoverageRelationStatistics Valid=557, Invalid=4993, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 18:59:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2020-12-22 18:59:40,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1037. [2020-12-22 18:59:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1037 states. [2020-12-22 18:59:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1172 transitions. [2020-12-22 18:59:40,355 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1172 transitions. Word has length 80 [2020-12-22 18:59:40,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:40,355 INFO L481 AbstractCegarLoop]: Abstraction has 1037 states and 1172 transitions. [2020-12-22 18:59:40,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 18:59:40,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1172 transitions. [2020-12-22 18:59:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 18:59:40,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:40,358 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:40,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 18:59:40,559 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:40,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1003116751, now seen corresponding path program 7 times [2020-12-22 18:59:40,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:40,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863930701] [2020-12-22 18:59:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:59:40,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863930701] [2020-12-22 18:59:40,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520592454] [2020-12-22 18:59:40,906 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 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 18:59:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:41,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 18:59:41,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:41,028 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_34|], 1=[|v_#valid_37|]} [2020-12-22 18:59:41,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:59:41,034 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 18:59:41,036 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:41,047 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:41,053 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 18:59:41,056 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:41,070 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:41,073 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 18:59:41,073 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 18:59:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:59:41,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:41,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-22 18:59:41,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615157412] [2020-12-22 18:59:41,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 18:59:41,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:41,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 18:59:41,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2020-12-22 18:59:41,644 INFO L87 Difference]: Start difference. First operand 1037 states and 1172 transitions. Second operand 23 states. [2020-12-22 18:59:43,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:43,287 INFO L93 Difference]: Finished difference Result 1666 states and 1854 transitions. [2020-12-22 18:59:43,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 18:59:43,288 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-12-22 18:59:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:43,294 INFO L225 Difference]: With dead ends: 1666 [2020-12-22 18:59:43,294 INFO L226 Difference]: Without dead ends: 1666 [2020-12-22 18:59:43,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 18:59:43,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2020-12-22 18:59:43,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1218. [2020-12-22 18:59:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1218 states. [2020-12-22 18:59:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1375 transitions. [2020-12-22 18:59:43,322 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1375 transitions. Word has length 84 [2020-12-22 18:59:43,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:43,323 INFO L481 AbstractCegarLoop]: Abstraction has 1218 states and 1375 transitions. [2020-12-22 18:59:43,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 18:59:43,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1375 transitions. [2020-12-22 18:59:43,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 18:59:43,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:43,326 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:43,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 18:59:43,541 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:43,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:43,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1484661605, now seen corresponding path program 11 times [2020-12-22 18:59:43,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:43,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852891205] [2020-12-22 18:59:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:59:44,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852891205] [2020-12-22 18:59:44,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688154832] [2020-12-22 18:59:44,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:44,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 18:59:44,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:59:44,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 18:59:44,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:44,817 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 18:59:44,818 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:44,829 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:44,831 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 18:59:44,831 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:59:45,324 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 18:59:45,330 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:45,333 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:45,333 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 18:59:45,334 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 18:59:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:59:45,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:45,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 35 [2020-12-22 18:59:45,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327477698] [2020-12-22 18:59:45,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 18:59:45,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:45,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 18:59:45,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 18:59:45,354 INFO L87 Difference]: Start difference. First operand 1218 states and 1375 transitions. Second operand 35 states. [2020-12-22 18:59:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:50,012 INFO L93 Difference]: Finished difference Result 1810 states and 1994 transitions. [2020-12-22 18:59:50,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 18:59:50,014 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 86 [2020-12-22 18:59:50,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:50,020 INFO L225 Difference]: With dead ends: 1810 [2020-12-22 18:59:50,020 INFO L226 Difference]: Without dead ends: 1602 [2020-12-22 18:59:50,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=278, Invalid=2074, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 18:59:50,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2020-12-22 18:59:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1451. [2020-12-22 18:59:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1451 states. [2020-12-22 18:59:50,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 1636 transitions. [2020-12-22 18:59:50,052 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 1636 transitions. Word has length 86 [2020-12-22 18:59:50,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:50,053 INFO L481 AbstractCegarLoop]: Abstraction has 1451 states and 1636 transitions. [2020-12-22 18:59:50,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 18:59:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 1636 transitions. [2020-12-22 18:59:50,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 18:59:50,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:50,056 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:50,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 18:59:50,270 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:50,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:50,270 INFO L82 PathProgramCache]: Analyzing trace with hash 777978040, now seen corresponding path program 12 times [2020-12-22 18:59:50,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:50,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522051839] [2020-12-22 18:59:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:59:50,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522051839] [2020-12-22 18:59:50,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584720824] [2020-12-22 18:59:50,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:51,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 18:59:51,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:59:51,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 18:59:51,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:51,148 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:51,149 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 18:59:51,153 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:51,200 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:59:51,205 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 18:59:51,205 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:59:51,280 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 18:59:51,281 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:51,285 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:51,286 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:51,288 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-22 18:59:51,705 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:51,706 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 20 treesize of output 20 [2020-12-22 18:59:51,708 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:59:51,710 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:51,721 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:51,722 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:51,723 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2020-12-22 18:59:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-12-22 18:59:51,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:51,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2020-12-22 18:59:51,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517823177] [2020-12-22 18:59:51,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 18:59:51,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:51,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 18:59:51,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2020-12-22 18:59:51,884 INFO L87 Difference]: Start difference. First operand 1451 states and 1636 transitions. Second operand 29 states. [2020-12-22 18:59:55,263 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 18:59:56,937 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 18:59:57,316 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-12-22 18:59:58,401 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-22 18:59:58,594 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-12-22 18:59:59,217 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-12-22 18:59:59,633 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 19:00:00,065 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-12-22 19:00:01,306 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-12-22 19:00:02,462 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 19:00:02,726 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 19:00:03,032 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-12-22 19:00:04,302 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-12-22 19:00:05,452 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 19:00:05,871 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-12-22 19:00:06,914 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 19:00:07,164 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-12-22 19:00:08,319 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-12-22 19:00:09,556 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 19:00:10,782 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 19:00:11,987 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 19:00:13,190 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 19:00:14,420 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 19:00:14,885 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 19:00:15,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:15,753 INFO L93 Difference]: Finished difference Result 1838 states and 1989 transitions. [2020-12-22 19:00:15,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-12-22 19:00:15,755 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 90 [2020-12-22 19:00:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:15,761 INFO L225 Difference]: With dead ends: 1838 [2020-12-22 19:00:15,761 INFO L226 Difference]: Without dead ends: 1535 [2020-12-22 19:00:15,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6267 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=6075, Invalid=20657, Unknown=0, NotChecked=0, Total=26732 [2020-12-22 19:00:15,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2020-12-22 19:00:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1001. [2020-12-22 19:00:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2020-12-22 19:00:15,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1101 transitions. [2020-12-22 19:00:15,784 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1101 transitions. Word has length 90 [2020-12-22 19:00:15,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:15,784 INFO L481 AbstractCegarLoop]: Abstraction has 1001 states and 1101 transitions. [2020-12-22 19:00:15,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 19:00:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1101 transitions. [2020-12-22 19:00:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 19:00:15,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:15,787 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:16,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 19:00:16,003 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:16,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:16,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1725290594, now seen corresponding path program 8 times [2020-12-22 19:00:16,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:16,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794493713] [2020-12-22 19:00:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:17,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794493713] [2020-12-22 19:00:17,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793850533] [2020-12-22 19:00:17,061 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:17,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:00:17,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:17,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 19:00:17,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:17,212 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 19:00:17,215 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:17,226 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:17,228 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:17,228 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-22 19:00:17,876 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 19:00:17,878 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:17,896 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:17,898 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 19:00:17,898 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2020-12-22 19:00:18,031 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 19:00:18,037 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:18,059 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:18,061 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 19:00:18,062 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:34 [2020-12-22 19:00:20,853 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:00:20,887 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:20,888 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 47 [2020-12-22 19:00:20,891 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:20,945 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:20,952 INFO L547 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:20,953 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:64, output treesize:8 [2020-12-22 19:00:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:21,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:21,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 46 [2020-12-22 19:00:21,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717388831] [2020-12-22 19:00:21,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 19:00:21,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:21,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 19:00:21,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1961, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:00:21,169 INFO L87 Difference]: Start difference. First operand 1001 states and 1101 transitions. Second operand 46 states. [2020-12-22 19:00:22,797 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-12-22 19:00:23,579 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-12-22 19:00:23,888 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-12-22 19:00:24,247 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-12-22 19:00:24,621 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-12-22 19:00:24,973 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-12-22 19:00:25,560 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-12-22 19:00:25,932 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-12-22 19:00:26,238 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-12-22 19:00:26,945 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-12-22 19:00:27,350 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-12-22 19:00:28,022 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-12-22 19:00:28,424 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-12-22 19:00:28,788 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-12-22 19:00:29,110 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-22 19:00:31,435 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-22 19:00:31,771 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-12-22 19:00:32,245 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-12-22 19:00:36,191 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-12-22 19:00:36,447 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-12-22 19:00:38,795 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-12-22 19:00:39,078 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54