/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:33:27,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:33:27,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:33:27,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:33:27,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:33:27,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:33:27,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:33:27,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:33:27,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:33:27,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:33:27,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:33:27,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:33:27,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:33:27,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:33:27,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:33:27,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:33:27,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:33:27,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:33:27,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:33:27,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:33:27,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:33:27,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:33:27,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:33:27,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:33:27,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:33:27,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:33:27,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:33:27,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:33:27,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:33:27,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:33:27,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:33:27,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:33:27,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:33:27,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:33:27,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:33:27,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:33:27,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:33:27,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:33:27,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:33:27,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:33:27,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:33:27,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:33:27,906 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:33:27,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:33:27,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:33:27,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:33:27,909 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:33:27,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:33:27,909 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:33:27,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:33:27,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:33:27,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:33:27,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:33:27,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:33:27,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:33:27,911 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:33:27,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:33:27,911 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:33:27,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:33:27,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:33:27,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:33:27,912 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:33:27,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:33:27,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:33:27,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:33:27,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:33:27,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:33:27,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:33:27,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:33:27,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:33:27,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:33:27,915 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:33:28,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:33:28,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:33:28,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:33:28,367 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:33:28,368 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:33:28,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-10-29 09:33:28,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92293f793/166cac9e15e54934b079a1602a243c9b/FLAG1675044d2 [2020-10-29 09:33:29,184 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:33:29,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_6.c [2020-10-29 09:33:29,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92293f793/166cac9e15e54934b079a1602a243c9b/FLAG1675044d2 [2020-10-29 09:33:29,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92293f793/166cac9e15e54934b079a1602a243c9b [2020-10-29 09:33:29,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:33:29,551 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:33:29,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:33:29,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:33:29,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:33:29,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:33:29" (1/1) ... [2020-10-29 09:33:29,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cbadeea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:29, skipping insertion in model container [2020-10-29 09:33:29,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:33:29" (1/1) ... [2020-10-29 09:33:29,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:33:29,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:33:29,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:33:29,762 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:33:29,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:33:29,797 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:33:29,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:29 WrapperNode [2020-10-29 09:33:29,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:33:29,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:33:29,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:33:29,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:33:29,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:29" (1/1) ... [2020-10-29 09:33:29,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:29" (1/1) ... [2020-10-29 09:33:29,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:29" (1/1) ... [2020-10-29 09:33:29,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:29" (1/1) ... [2020-10-29 09:33:29,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:29" (1/1) ... [2020-10-29 09:33:29,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:29" (1/1) ... [2020-10-29 09:33:29,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:29" (1/1) ... [2020-10-29 09:33:29,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:33:29,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:33:29,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:33:29,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:33:29,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-29 09:33:29,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:33:29,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:33:29,916 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:33:29,916 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:33:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:33:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:33:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:33:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:33:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:33:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:33:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:33:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:33:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:33:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:33:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:33:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:33:30,323 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:33:30,324 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:33:30,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:33:30 BoogieIcfgContainer [2020-10-29 09:33:30,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:33:30,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:33:30,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:33:30,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:33:30,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:33:29" (1/3) ... [2020-10-29 09:33:30,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52530552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:33:30, skipping insertion in model container [2020-10-29 09:33:30,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:29" (2/3) ... [2020-10-29 09:33:30,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52530552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:33:30, skipping insertion in model container [2020-10-29 09:33:30,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:33:30" (3/3) ... [2020-10-29 09:33:30,337 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-10-29 09:33:30,352 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:33:30,358 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:33:30,374 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:33:30,403 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:33:30,404 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:33:30,404 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:33:30,404 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:33:30,404 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:33:30,404 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:33:30,404 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:33:30,405 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:33:30,424 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-29 09:33:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:33:30,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:30,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:30,440 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:30,454 INFO L82 PathProgramCache]: Analyzing trace with hash -2118099465, now seen corresponding path program 1 times [2020-10-29 09:33:30,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:30,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953214392] [2020-10-29 09:33:30,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:30,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:30,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:30,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:33:30,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:30,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-29 09:33:30,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:30,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:30,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:30,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:33:30,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:33:30,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:33:31,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:31,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:31,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:31,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:31,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:31,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:33:31,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:31,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:31,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:31,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:31,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:31,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:31,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953214392] [2020-10-29 09:33:31,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:31,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:31,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910168696] [2020-10-29 09:33:31,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:31,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:31,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:31,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:31,158 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-10-29 09:33:31,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:31,362 INFO L93 Difference]: Finished difference Result 68 states and 109 transitions. [2020-10-29 09:33:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:31,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-29 09:33:31,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:31,375 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:33:31,375 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:33:31,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:33:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-10-29 09:33:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:33:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 59 transitions. [2020-10-29 09:33:31,426 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 59 transitions. Word has length 18 [2020-10-29 09:33:31,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:31,427 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 59 transitions. [2020-10-29 09:33:31,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 59 transitions. [2020-10-29 09:33:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:33:31,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:31,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:31,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:33:31,429 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:31,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:31,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1783840821, now seen corresponding path program 1 times [2020-10-29 09:33:31,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:31,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453903963] [2020-10-29 09:33:31,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:31,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:31,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:31,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:33:31,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:31,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-29 09:33:31,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:31,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:31,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:31,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:33:31,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:33:31,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:31,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:31,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:31,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:31,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:31,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:31,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:33:31,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:31,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:31,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:31,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:31,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:31,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:31,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453903963] [2020-10-29 09:33:31,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:31,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:31,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073161158] [2020-10-29 09:33:31,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:31,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:31,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:31,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:31,653 INFO L87 Difference]: Start difference. First operand 36 states and 59 transitions. Second operand 4 states. [2020-10-29 09:33:31,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:31,827 INFO L93 Difference]: Finished difference Result 79 states and 135 transitions. [2020-10-29 09:33:31,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:31,827 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-29 09:33:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:31,829 INFO L225 Difference]: With dead ends: 79 [2020-10-29 09:33:31,829 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:33:31,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:33:31,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-29 09:33:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:33:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 79 transitions. [2020-10-29 09:33:31,842 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 79 transitions. Word has length 18 [2020-10-29 09:33:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:31,842 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 79 transitions. [2020-10-29 09:33:31,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:31,842 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 79 transitions. [2020-10-29 09:33:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:33:31,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:31,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:31,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:33:31,844 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:31,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1229925405, now seen corresponding path program 1 times [2020-10-29 09:33:31,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:31,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374194334] [2020-10-29 09:33:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:31,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:31,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:31,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:31,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:33:31,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:31,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-29 09:33:31,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:31,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:31,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:31,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:33:31,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:33:31,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:32,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:32,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:32,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:32,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:32,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:32,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:33:32,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:32,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:32,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:32,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:32,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:32,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:32,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374194334] [2020-10-29 09:33:32,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:32,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:32,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536799528] [2020-10-29 09:33:32,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:32,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:32,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:32,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:32,040 INFO L87 Difference]: Start difference. First operand 48 states and 79 transitions. Second operand 4 states. [2020-10-29 09:33:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:32,169 INFO L93 Difference]: Finished difference Result 128 states and 220 transitions. [2020-10-29 09:33:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:32,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-29 09:33:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:32,171 INFO L225 Difference]: With dead ends: 128 [2020-10-29 09:33:32,171 INFO L226 Difference]: Without dead ends: 86 [2020-10-29 09:33:32,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-29 09:33:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-29 09:33:32,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-29 09:33:32,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 142 transitions. [2020-10-29 09:33:32,186 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 142 transitions. Word has length 19 [2020-10-29 09:33:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:32,186 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 142 transitions. [2020-10-29 09:33:32,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:32,187 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 142 transitions. [2020-10-29 09:33:32,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:33:32,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:32,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:32,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:33:32,188 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:32,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:32,189 INFO L82 PathProgramCache]: Analyzing trace with hash -836898395, now seen corresponding path program 1 times [2020-10-29 09:33:32,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:32,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004166760] [2020-10-29 09:33:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:32,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:32,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:32,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:32,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:33:32,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:32,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-29 09:33:32,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:32,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:32,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:32,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:33:32,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:33:32,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 18 [2020-10-29 09:33:32,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:32,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:32,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:32,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:32,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:32,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 09:33:32,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:32,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:32,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:32,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:32,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004166760] [2020-10-29 09:33:32,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:32,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:32,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103095178] [2020-10-29 09:33:32,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:32,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:32,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:32,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:32,413 INFO L87 Difference]: Start difference. First operand 85 states and 142 transitions. Second operand 4 states. [2020-10-29 09:33:32,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:32,584 INFO L93 Difference]: Finished difference Result 109 states and 181 transitions. [2020-10-29 09:33:32,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:32,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-29 09:33:32,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:32,587 INFO L225 Difference]: With dead ends: 109 [2020-10-29 09:33:32,587 INFO L226 Difference]: Without dead ends: 106 [2020-10-29 09:33:32,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-29 09:33:32,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2020-10-29 09:33:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-29 09:33:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 140 transitions. [2020-10-29 09:33:32,601 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 140 transitions. Word has length 19 [2020-10-29 09:33:32,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:32,601 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 140 transitions. [2020-10-29 09:33:32,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:32,602 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 140 transitions. [2020-10-29 09:33:32,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:33:32,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:32,603 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] [2020-10-29 09:33:32,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:33:32,603 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:32,604 INFO L82 PathProgramCache]: Analyzing trace with hash 533677250, now seen corresponding path program 1 times [2020-10-29 09:33:32,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:32,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283139337] [2020-10-29 09:33:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:32,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:32,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:32,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:32,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:33:32,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:32,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-29 09:33:32,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:32,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:32,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:32,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:33:32,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:33:32,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:32,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:32,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:32,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:32,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:32,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:32,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:33:32,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:32,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:32,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:32,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:32,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:32,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:32,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283139337] [2020-10-29 09:33:32,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:32,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:32,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417619714] [2020-10-29 09:33:32,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:32,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:32,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:32,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:32,767 INFO L87 Difference]: Start difference. First operand 85 states and 140 transitions. Second operand 4 states. [2020-10-29 09:33:32,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:32,890 INFO L93 Difference]: Finished difference Result 153 states and 255 transitions. [2020-10-29 09:33:32,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:32,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-29 09:33:32,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:32,893 INFO L225 Difference]: With dead ends: 153 [2020-10-29 09:33:32,893 INFO L226 Difference]: Without dead ends: 150 [2020-10-29 09:33:32,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:32,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-29 09:33:32,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 117. [2020-10-29 09:33:32,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-29 09:33:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 192 transitions. [2020-10-29 09:33:32,907 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 192 transitions. Word has length 20 [2020-10-29 09:33:32,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:32,907 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 192 transitions. [2020-10-29 09:33:32,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:32,908 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 192 transitions. [2020-10-29 09:33:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:33:32,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:32,909 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] [2020-10-29 09:33:32,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:33:32,910 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:32,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:32,910 INFO L82 PathProgramCache]: Analyzing trace with hash 140650240, now seen corresponding path program 1 times [2020-10-29 09:33:32,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:32,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107419534] [2020-10-29 09:33:32,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:32,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:32,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:32,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:32,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:33:32,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:32,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-29 09:33:33,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:33,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:33,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:33,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:33:33,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:33:33,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:33,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:33,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:33,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:33,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:33,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:33,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:33,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:33,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:33,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:33,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:33,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:33,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:33,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107419534] [2020-10-29 09:33:33,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:33,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:33,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577492465] [2020-10-29 09:33:33,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:33,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:33,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:33,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:33,068 INFO L87 Difference]: Start difference. First operand 117 states and 192 transitions. Second operand 4 states. [2020-10-29 09:33:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:33,201 INFO L93 Difference]: Finished difference Result 269 states and 447 transitions. [2020-10-29 09:33:33,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:33,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-29 09:33:33,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:33,203 INFO L225 Difference]: With dead ends: 269 [2020-10-29 09:33:33,203 INFO L226 Difference]: Without dead ends: 158 [2020-10-29 09:33:33,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:33,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-29 09:33:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-29 09:33:33,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-29 09:33:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 252 transitions. [2020-10-29 09:33:33,219 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 252 transitions. Word has length 20 [2020-10-29 09:33:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:33,219 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 252 transitions. [2020-10-29 09:33:33,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:33,220 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 252 transitions. [2020-10-29 09:33:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:33:33,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:33,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:33,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:33:33,221 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:33,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:33,222 INFO L82 PathProgramCache]: Analyzing trace with hash -629204722, now seen corresponding path program 1 times [2020-10-29 09:33:33,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:33,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621890324] [2020-10-29 09:33:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:33,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:33,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:33,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:33,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:33,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:33:33,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:33,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-29 09:33:33,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:33,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:33,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:33,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:33:33,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:33:33,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:33,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:33,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:33,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:33,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:33,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:33,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:33,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:33,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:33,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:33,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:33,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:33,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:33,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621890324] [2020-10-29 09:33:33,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:33,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:33,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381470886] [2020-10-29 09:33:33,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:33,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:33,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:33,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:33,439 INFO L87 Difference]: Start difference. First operand 157 states and 252 transitions. Second operand 4 states. [2020-10-29 09:33:33,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:33,540 INFO L93 Difference]: Finished difference Result 242 states and 387 transitions. [2020-10-29 09:33:33,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:33,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-29 09:33:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:33,542 INFO L225 Difference]: With dead ends: 242 [2020-10-29 09:33:33,542 INFO L226 Difference]: Without dead ends: 167 [2020-10-29 09:33:33,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:33,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-29 09:33:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-29 09:33:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-29 09:33:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 260 transitions. [2020-10-29 09:33:33,556 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 260 transitions. Word has length 21 [2020-10-29 09:33:33,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:33,556 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 260 transitions. [2020-10-29 09:33:33,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:33,556 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 260 transitions. [2020-10-29 09:33:33,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:33:33,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:33,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:33,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:33:33,558 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:33,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:33,559 INFO L82 PathProgramCache]: Analyzing trace with hash 71859856, now seen corresponding path program 1 times [2020-10-29 09:33:33,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:33,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165933067] [2020-10-29 09:33:33,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:33,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:33,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:33,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:33,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:33:33,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:33,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-29 09:33:33,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:33,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:33,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:33,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:33:33,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:33:33,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:33,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:33,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:33,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:33,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:33,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:33,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:33,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:33,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:33,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:33,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:33,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:33,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:33,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165933067] [2020-10-29 09:33:33,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:33,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:33,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274990430] [2020-10-29 09:33:33,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:33,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:33,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:33,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:33,790 INFO L87 Difference]: Start difference. First operand 166 states and 260 transitions. Second operand 4 states. [2020-10-29 09:33:33,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:33,892 INFO L93 Difference]: Finished difference Result 286 states and 451 transitions. [2020-10-29 09:33:33,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:33,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-29 09:33:33,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:33,895 INFO L225 Difference]: With dead ends: 286 [2020-10-29 09:33:33,895 INFO L226 Difference]: Without dead ends: 283 [2020-10-29 09:33:33,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-29 09:33:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 234. [2020-10-29 09:33:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-29 09:33:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 360 transitions. [2020-10-29 09:33:33,909 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 360 transitions. Word has length 21 [2020-10-29 09:33:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:33,909 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 360 transitions. [2020-10-29 09:33:33,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 360 transitions. [2020-10-29 09:33:33,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:33:33,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:33,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:33,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:33:33,912 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:33,912 INFO L82 PathProgramCache]: Analyzing trace with hash -321167154, now seen corresponding path program 1 times [2020-10-29 09:33:33,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:33,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288756994] [2020-10-29 09:33:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:33,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:33,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:33,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:33,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:33:33,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:33,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-29 09:33:33,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:33,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:33,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:33,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:33:33,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:33:33,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:34,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:34,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:34,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:34,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:34,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:34,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:34,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:34,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:34,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:34,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:34,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:34,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:34,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288756994] [2020-10-29 09:33:34,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:34,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:34,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654640595] [2020-10-29 09:33:34,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:34,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:34,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:34,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:34,035 INFO L87 Difference]: Start difference. First operand 234 states and 360 transitions. Second operand 4 states. [2020-10-29 09:33:34,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:34,142 INFO L93 Difference]: Finished difference Result 526 states and 811 transitions. [2020-10-29 09:33:34,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:34,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-29 09:33:34,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:34,144 INFO L225 Difference]: With dead ends: 526 [2020-10-29 09:33:34,144 INFO L226 Difference]: Without dead ends: 307 [2020-10-29 09:33:34,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-29 09:33:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2020-10-29 09:33:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-29 09:33:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 456 transitions. [2020-10-29 09:33:34,174 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 456 transitions. Word has length 21 [2020-10-29 09:33:34,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:34,174 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 456 transitions. [2020-10-29 09:33:34,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 456 transitions. [2020-10-29 09:33:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:33:34,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:34,176 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] [2020-10-29 09:33:34,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:33:34,176 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:34,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2060631477, now seen corresponding path program 1 times [2020-10-29 09:33:34,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:34,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472354861] [2020-10-29 09:33:34,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:34,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:34,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:34,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:34,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:34,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:33:34,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:34,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-29 09:33:34,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:34,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:34,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:34,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:33:34,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:33:34,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:34,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:34,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:34,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:34,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:34,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:34,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:33:34,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:34,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:34,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:34,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:34,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:34,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:34,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472354861] [2020-10-29 09:33:34,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:34,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:34,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464601947] [2020-10-29 09:33:34,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:34,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:34,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:34,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:34,361 INFO L87 Difference]: Start difference. First operand 306 states and 456 transitions. Second operand 4 states. [2020-10-29 09:33:34,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:34,457 INFO L93 Difference]: Finished difference Result 450 states and 663 transitions. [2020-10-29 09:33:34,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:34,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-29 09:33:34,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:34,460 INFO L225 Difference]: With dead ends: 450 [2020-10-29 09:33:34,460 INFO L226 Difference]: Without dead ends: 307 [2020-10-29 09:33:34,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:34,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-29 09:33:34,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2020-10-29 09:33:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-29 09:33:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 440 transitions. [2020-10-29 09:33:34,475 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 440 transitions. Word has length 22 [2020-10-29 09:33:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:34,475 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 440 transitions. [2020-10-29 09:33:34,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:34,476 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 440 transitions. [2020-10-29 09:33:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:33:34,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:34,477 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] [2020-10-29 09:33:34,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:33:34,477 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:34,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:34,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1223218569, now seen corresponding path program 1 times [2020-10-29 09:33:34,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:34,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726463407] [2020-10-29 09:33:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:34,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:34,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:34,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:34,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:33:34,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:34,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-29 09:33:34,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:34,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:34,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:34,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:33:34,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:33:34,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:34,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:34,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:34,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:34,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:34,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:34,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:34,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:34,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:34,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:34,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:34,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:34,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:34,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726463407] [2020-10-29 09:33:34,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:34,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:34,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191247809] [2020-10-29 09:33:34,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:34,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:34,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:34,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:34,594 INFO L87 Difference]: Start difference. First operand 306 states and 440 transitions. Second operand 4 states. [2020-10-29 09:33:34,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:34,734 INFO L93 Difference]: Finished difference Result 518 states and 747 transitions. [2020-10-29 09:33:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:34,734 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-29 09:33:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:34,738 INFO L225 Difference]: With dead ends: 518 [2020-10-29 09:33:34,738 INFO L226 Difference]: Without dead ends: 515 [2020-10-29 09:33:34,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:34,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-10-29 09:33:34,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 450. [2020-10-29 09:33:34,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-29 09:33:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 632 transitions. [2020-10-29 09:33:34,760 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 632 transitions. Word has length 22 [2020-10-29 09:33:34,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:34,761 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 632 transitions. [2020-10-29 09:33:34,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:34,761 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 632 transitions. [2020-10-29 09:33:34,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:33:34,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:34,762 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] [2020-10-29 09:33:34,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:33:34,763 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:34,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:34,763 INFO L82 PathProgramCache]: Analyzing trace with hash 830191559, now seen corresponding path program 1 times [2020-10-29 09:33:34,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:34,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905067613] [2020-10-29 09:33:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:34,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:34,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:34,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:34,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:33:34,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:34,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-29 09:33:34,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:34,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:34,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:34,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:33:34,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:33:34,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:34,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:34,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:34,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:34,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:34,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:34,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:34,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:34,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:34,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:34,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:34,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:34,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:34,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905067613] [2020-10-29 09:33:34,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:34,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:34,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459181984] [2020-10-29 09:33:34,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:34,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:34,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:34,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:34,887 INFO L87 Difference]: Start difference. First operand 450 states and 632 transitions. Second operand 4 states. [2020-10-29 09:33:35,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:35,019 INFO L93 Difference]: Finished difference Result 1014 states and 1419 transitions. [2020-10-29 09:33:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:35,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-29 09:33:35,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:35,023 INFO L225 Difference]: With dead ends: 1014 [2020-10-29 09:33:35,023 INFO L226 Difference]: Without dead ends: 579 [2020-10-29 09:33:35,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:35,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2020-10-29 09:33:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 578. [2020-10-29 09:33:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-10-29 09:33:35,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 776 transitions. [2020-10-29 09:33:35,051 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 776 transitions. Word has length 22 [2020-10-29 09:33:35,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:35,051 INFO L481 AbstractCegarLoop]: Abstraction has 578 states and 776 transitions. [2020-10-29 09:33:35,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:35,051 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 776 transitions. [2020-10-29 09:33:35,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:33:35,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:35,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:35,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:33:35,053 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:35,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:35,053 INFO L82 PathProgramCache]: Analyzing trace with hash -728239171, now seen corresponding path program 1 times [2020-10-29 09:33:35,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:35,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560199445] [2020-10-29 09:33:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:35,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:35,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:35,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:35,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:35,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:33:35,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:35,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-29 09:33:35,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:35,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:35,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:35,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:33:35,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:33:35,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:35,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:35,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:35,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:35,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:35,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:35,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 09:33:35,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:35,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:35,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:35,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:35,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:35,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:35,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560199445] [2020-10-29 09:33:35,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:35,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:35,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549151528] [2020-10-29 09:33:35,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:35,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:35,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:35,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:35,336 INFO L87 Difference]: Start difference. First operand 578 states and 776 transitions. Second operand 4 states. [2020-10-29 09:33:35,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:35,462 INFO L93 Difference]: Finished difference Result 878 states and 1179 transitions. [2020-10-29 09:33:35,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:35,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-29 09:33:35,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:35,466 INFO L225 Difference]: With dead ends: 878 [2020-10-29 09:33:35,466 INFO L226 Difference]: Without dead ends: 603 [2020-10-29 09:33:35,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-29 09:33:35,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 602. [2020-10-29 09:33:35,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-10-29 09:33:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 792 transitions. [2020-10-29 09:33:35,495 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 792 transitions. Word has length 23 [2020-10-29 09:33:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:35,495 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 792 transitions. [2020-10-29 09:33:35,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 792 transitions. [2020-10-29 09:33:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:33:35,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:35,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:35,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:33:35,497 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:35,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:35,498 INFO L82 PathProgramCache]: Analyzing trace with hash -27174593, now seen corresponding path program 1 times [2020-10-29 09:33:35,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:35,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133100507] [2020-10-29 09:33:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:35,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:35,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:35,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:35,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:33:35,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:35,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-29 09:33:35,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:35,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:35,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:35,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:33:35,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:33:35,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:35,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:35,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:35,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:35,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:35,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:35,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:35,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:35,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:35,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:35,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:35,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:35,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:35,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133100507] [2020-10-29 09:33:35,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:35,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:35,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88914739] [2020-10-29 09:33:35,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:35,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:35,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:35,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:35,635 INFO L87 Difference]: Start difference. First operand 602 states and 792 transitions. Second operand 4 states. [2020-10-29 09:33:35,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:35,758 INFO L93 Difference]: Finished difference Result 973 states and 1258 transitions. [2020-10-29 09:33:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:35,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-29 09:33:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:35,765 INFO L225 Difference]: With dead ends: 973 [2020-10-29 09:33:35,765 INFO L226 Difference]: Without dead ends: 970 [2020-10-29 09:33:35,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:35,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-10-29 09:33:35,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 906. [2020-10-29 09:33:35,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 906 states. [2020-10-29 09:33:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1160 transitions. [2020-10-29 09:33:35,805 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1160 transitions. Word has length 23 [2020-10-29 09:33:35,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:35,806 INFO L481 AbstractCegarLoop]: Abstraction has 906 states and 1160 transitions. [2020-10-29 09:33:35,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1160 transitions. [2020-10-29 09:33:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:33:35,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:35,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:35,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:33:35,808 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:35,809 INFO L82 PathProgramCache]: Analyzing trace with hash -420201603, now seen corresponding path program 1 times [2020-10-29 09:33:35,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:35,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62051894] [2020-10-29 09:33:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:35,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:35,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:35,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:35,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:33:35,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:35,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-29 09:33:35,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:35,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:35,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:35,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:33:35,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:33:35,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:35,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:35,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:35,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:35,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:35,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:35,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:35,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:35,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:35,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:35,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:35,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:35,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:35,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62051894] [2020-10-29 09:33:35,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:35,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:35,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527773037] [2020-10-29 09:33:35,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:35,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:35,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:35,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:35,971 INFO L87 Difference]: Start difference. First operand 906 states and 1160 transitions. Second operand 4 states. [2020-10-29 09:33:36,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:36,099 INFO L93 Difference]: Finished difference Result 1994 states and 2504 transitions. [2020-10-29 09:33:36,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:36,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-29 09:33:36,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:36,100 INFO L225 Difference]: With dead ends: 1994 [2020-10-29 09:33:36,100 INFO L226 Difference]: Without dead ends: 0 [2020-10-29 09:33:36,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:36,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-29 09:33:36,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-29 09:33:36,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-29 09:33:36,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-29 09:33:36,106 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-10-29 09:33:36,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:36,107 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-29 09:33:36,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:36,107 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-29 09:33:36,107 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-29 09:33:36,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:33:36,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-29 09:33:36,967 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 33 [2020-10-29 09:33:37,033 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-29 09:33:37,034 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-29 09:33:37,034 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-29 09:33:37,035 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-29 09:33:37,035 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-29 09:33:37,035 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-29 09:33:37,035 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-29 09:33:37,035 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-29 09:33:37,035 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-29 09:33:37,036 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-29 09:33:37,036 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-29 09:33:37,036 INFO L274 CegarLoopResult]: For program point L60-1(lines 29 104) no Hoare annotation was computed. [2020-10-29 09:33:37,036 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 109) no Hoare annotation was computed. [2020-10-29 09:33:37,036 INFO L274 CegarLoopResult]: For program point L85(line 85) no Hoare annotation was computed. [2020-10-29 09:33:37,036 INFO L274 CegarLoopResult]: For program point L52-1(lines 29 104) no Hoare annotation was computed. [2020-10-29 09:33:37,036 INFO L274 CegarLoopResult]: For program point L94-1(lines 29 104) no Hoare annotation was computed. [2020-10-29 09:33:37,036 INFO L274 CegarLoopResult]: For program point L95(line 95) no Hoare annotation was computed. [2020-10-29 09:33:37,037 INFO L274 CegarLoopResult]: For program point L79-1(lines 29 104) no Hoare annotation was computed. [2020-10-29 09:33:37,037 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 109) no Hoare annotation was computed. [2020-10-29 09:33:37,037 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 109) the Hoare annotation is: true [2020-10-29 09:33:37,037 INFO L274 CegarLoopResult]: For program point L80(line 80) no Hoare annotation was computed. [2020-10-29 09:33:37,037 INFO L277 CegarLoopResult]: At program point L105(lines 7 109) the Hoare annotation is: true [2020-10-29 09:33:37,038 INFO L274 CegarLoopResult]: For program point L31(lines 31 33) no Hoare annotation was computed. [2020-10-29 09:33:37,038 INFO L274 CegarLoopResult]: For program point L64-1(lines 29 104) no Hoare annotation was computed. [2020-10-29 09:33:37,038 INFO L274 CegarLoopResult]: For program point L89-1(lines 29 104) no Hoare annotation was computed. [2020-10-29 09:33:37,038 INFO L274 CegarLoopResult]: For program point L56-1(lines 29 104) no Hoare annotation was computed. [2020-10-29 09:33:37,038 INFO L274 CegarLoopResult]: For program point L48(lines 48 50) no Hoare annotation was computed. [2020-10-29 09:33:37,038 INFO L274 CegarLoopResult]: For program point L48-2(lines 29 104) no Hoare annotation was computed. [2020-10-29 09:33:37,039 INFO L274 CegarLoopResult]: For program point L90(line 90) no Hoare annotation was computed. [2020-10-29 09:33:37,039 INFO L274 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-10-29 09:33:37,039 INFO L274 CegarLoopResult]: For program point L74-1(lines 29 104) no Hoare annotation was computed. [2020-10-29 09:33:37,040 INFO L277 CegarLoopResult]: At program point L99-1(lines 29 104) the Hoare annotation is: true [2020-10-29 09:33:37,040 INFO L274 CegarLoopResult]: For program point L75(line 75) no Hoare annotation was computed. [2020-10-29 09:33:37,040 INFO L274 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-10-29 09:33:37,040 INFO L270 CegarLoopResult]: At program point L100-1(lines 7 109) the Hoare annotation is: false [2020-10-29 09:33:37,040 INFO L274 CegarLoopResult]: For program point L84-1(lines 29 104) no Hoare annotation was computed. [2020-10-29 09:33:37,040 INFO L274 CegarLoopResult]: For program point L68-1(lines 29 104) no Hoare annotation was computed. [2020-10-29 09:33:37,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:33:37 BoogieIcfgContainer [2020-10-29 09:33:37,053 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:33:37,055 INFO L168 Benchmark]: Toolchain (without parser) took 7508.19 ms. Allocated memory was 151.0 MB in the beginning and 267.4 MB in the end (delta: 116.4 MB). Free memory was 126.0 MB in the beginning and 244.6 MB in the end (delta: -118.6 MB). Peak memory consumption was 123.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:33:37,055 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 151.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:33:37,056 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.62 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 115.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-29 09:33:37,064 INFO L168 Benchmark]: Boogie Preprocessor took 36.09 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:33:37,068 INFO L168 Benchmark]: RCFGBuilder took 490.56 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 130.8 MB in the end (delta: -16.7 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:33:37,068 INFO L168 Benchmark]: TraceAbstraction took 6724.16 ms. Allocated memory was 151.0 MB in the beginning and 267.4 MB in the end (delta: 116.4 MB). Free memory was 130.8 MB in the beginning and 244.6 MB in the end (delta: -113.8 MB). Peak memory consumption was 126.9 MB. Max. memory is 8.0 GB. [2020-10-29 09:33:37,075 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 ms. Allocated memory is still 151.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 245.62 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 115.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.09 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 490.56 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 130.8 MB in the end (delta: -16.7 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6724.16 ms. Allocated memory was 151.0 MB in the beginning and 267.4 MB in the end (delta: 116.4 MB). Free memory was 130.8 MB in the beginning and 244.6 MB in the end (delta: -113.8 MB). Peak memory consumption was 126.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.7s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 830 SDtfs, 1125 SDslu, 117 SDs, 0 SdLazy, 603 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=906occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 253 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 22 PreInvPairs, 89 NumberOfFragments, 38 HoareAnnotationTreeSize, 22 FomulaSimplifications, 209354 FormulaSimplificationTreeSizeReduction, 0.8s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 312 NumberOfCodeBlocks, 312 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 297 ConstructedInterpolants, 0 QuantifiedInterpolants, 19009 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 15 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...