/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=SHALLOWEST --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/array-fpi/ms5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:38:36,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:38:36,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:38:36,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:38:36,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:38:36,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:38:36,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:38:36,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:38:36,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:38:36,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:38:36,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:38:36,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:38:36,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:38:36,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:38:36,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:38:36,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:38:36,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:38:36,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:38:36,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:38:36,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:38:36,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:38:36,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:38:36,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:38:36,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:38:36,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:38:36,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:38:36,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:38:36,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:38:36,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:38:36,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:38:36,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:38:36,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:38:36,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:38:36,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:38:36,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:38:36,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:38:36,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:38:36,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:38:36,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:38:36,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:38:36,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:38:36,845 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 [2020-10-26 19:38:36,893 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:38:36,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:38:36,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:38:36,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:38:36,897 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:38:36,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:38:36,898 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:38:36,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:38:36,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:38:36,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:38:36,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:38:36,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:38:36,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:38:36,900 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:38:36,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:38:36,900 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:38:36,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:38:36,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:38:36,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:38:36,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:38:36,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:38:36,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:38:36,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:38:36,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:38:36,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:38:36,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:38:36,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:38:36,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:38:36,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:38:36,914 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:38:37,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:38:37,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:38:37,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:38:37,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:38:37,353 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:38:37,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms5.c [2020-10-26 19:38:37,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dfc90858/52fdb32f0f0949218cb922353928c0a6/FLAG2b39139a5 [2020-10-26 19:38:38,075 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:38:38,076 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ms5.c [2020-10-26 19:38:38,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dfc90858/52fdb32f0f0949218cb922353928c0a6/FLAG2b39139a5 [2020-10-26 19:38:38,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dfc90858/52fdb32f0f0949218cb922353928c0a6 [2020-10-26 19:38:38,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:38:38,453 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:38:38,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:38:38,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:38:38,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:38:38,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:38:38" (1/1) ... [2020-10-26 19:38:38,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62043c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:38, skipping insertion in model container [2020-10-26 19:38:38,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:38:38" (1/1) ... [2020-10-26 19:38:38,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:38:38,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:38:38,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:38:38,662 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:38:38,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:38:38,703 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:38:38,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:38 WrapperNode [2020-10-26 19:38:38,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:38:38,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:38:38,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:38:38,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:38:38,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:38" (1/1) ... [2020-10-26 19:38:38,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:38" (1/1) ... [2020-10-26 19:38:38,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:38" (1/1) ... [2020-10-26 19:38:38,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:38" (1/1) ... [2020-10-26 19:38:38,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:38" (1/1) ... [2020-10-26 19:38:38,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:38" (1/1) ... [2020-10-26 19:38:38,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:38" (1/1) ... [2020-10-26 19:38:38,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:38:38,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:38:38,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:38:38,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:38:38,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:38" (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 [2020-10-26 19:38:38,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:38:38,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:38:38,827 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:38:38,827 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:38:38,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:38:38,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:38:38,829 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:38:38,829 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:38:38,829 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:38:38,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:38:38,830 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:38:38,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:38:38,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:38:38,831 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:38:38,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:38:38,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:38:38,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:38:38,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:38:38,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:38:38,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:38:38,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:38:38,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:38:39,433 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:38:39,434 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 19:38:39,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:38:39 BoogieIcfgContainer [2020-10-26 19:38:39,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:38:39,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:38:39,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:38:39,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:38:39,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:38:38" (1/3) ... [2020-10-26 19:38:39,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2967dd18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:38:39, skipping insertion in model container [2020-10-26 19:38:39,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:38" (2/3) ... [2020-10-26 19:38:39,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2967dd18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:38:39, skipping insertion in model container [2020-10-26 19:38:39,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:38:39" (3/3) ... [2020-10-26 19:38:39,450 INFO L111 eAbstractionObserver]: Analyzing ICFG ms5.c [2020-10-26 19:38:39,463 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:38:39,468 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:38:39,483 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:38:39,529 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:38:39,530 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:38:39,530 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:38:39,530 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:38:39,530 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:38:39,531 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:38:39,531 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:38:39,531 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:38:39,555 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-26 19:38:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:38:39,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:39,565 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] [2020-10-26 19:38:39,565 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:39,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:39,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1361575079, now seen corresponding path program 1 times [2020-10-26 19:38:39,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:39,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706912017] [2020-10-26 19:38:39,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:39,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:39,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:39,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:40,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:38:40,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:38:40,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-26 19:38:40,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:40,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:38:40,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:40,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:38:40,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:38:40,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:40,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:40,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:40,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:40,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 19:38:40,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:40,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:40,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:40,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:40,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:40,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:40,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:40,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:40,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:38:40,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 19:38:40,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:40,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:40,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:40,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:40,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:40,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706912017] [2020-10-26 19:38:40,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:38:40,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:38:40,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243809046] [2020-10-26 19:38:40,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:38:40,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:40,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:38:40,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:38:40,564 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 5 states. [2020-10-26 19:38:40,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:40,853 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-10-26 19:38:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:38:40,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-26 19:38:40,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:40,864 INFO L225 Difference]: With dead ends: 65 [2020-10-26 19:38:40,864 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:38:40,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:38:40,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:38:40,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-26 19:38:40,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 19:38:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-26 19:38:40,910 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-10-26 19:38:40,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:40,910 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-26 19:38:40,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:38:40,911 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-26 19:38:40,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:38:40,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:40,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:40,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:38:40,912 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:40,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1619095335, now seen corresponding path program 1 times [2020-10-26 19:38:40,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:40,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301812914] [2020-10-26 19:38:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:40,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:41,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:41,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:41,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:38:41,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:38:41,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 776 [2020-10-26 19:38:41,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:41,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:38:41,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:41,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:38:41,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:41,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:41,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:41,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:41,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:41,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:41,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:38:41,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:41,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:41,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:41,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:41,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:41,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:41,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:41,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:41,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:41,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:41,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:38:41,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:41,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:41,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:41,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:41,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:38:41,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301812914] [2020-10-26 19:38:41,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:38:41,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-26 19:38:41,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072665325] [2020-10-26 19:38:41,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:38:41,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:41,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:38:41,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:38:41,941 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-26 19:38:42,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:42,595 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-26 19:38:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:38:42,596 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-26 19:38:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:42,598 INFO L225 Difference]: With dead ends: 38 [2020-10-26 19:38:42,598 INFO L226 Difference]: Without dead ends: 31 [2020-10-26 19:38:42,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:38:42,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-26 19:38:42,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-26 19:38:42,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:38:42,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-26 19:38:42,608 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2020-10-26 19:38:42,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:42,608 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-26 19:38:42,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:38:42,609 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-26 19:38:42,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:38:42,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:42,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:42,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:38:42,610 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:42,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:42,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1995813591, now seen corresponding path program 1 times [2020-10-26 19:38:42,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:42,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161577919] [2020-10-26 19:38:42,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:42,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:42,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:42,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:43,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:43,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:38:43,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:38:43,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 826 [2020-10-26 19:38:43,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:43,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:38:43,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:43,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:38:43,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:43,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:43,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:43,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:43,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:43,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:43,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:38:43,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:43,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:43,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:43,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:43,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:43,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:43,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:43,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:43,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:43,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:43,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:38:43,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:43,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:43,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:43,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:43,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:43,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161577919] [2020-10-26 19:38:43,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:43,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:38:43,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733420680] [2020-10-26 19:38:43,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:38:43,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:43,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:38:43,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:38:43,817 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-26 19:38:44,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:44,291 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-26 19:38:44,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:38:44,292 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-26 19:38:44,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:44,293 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:38:44,293 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:38:44,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:38:44,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:38:44,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-26 19:38:44,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:38:44,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-26 19:38:44,302 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-10-26 19:38:44,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:44,303 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-26 19:38:44,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:38:44,303 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-26 19:38:44,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:38:44,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:44,304 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:44,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:38:44,305 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:44,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1079019474, now seen corresponding path program 1 times [2020-10-26 19:38:44,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:44,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837808756] [2020-10-26 19:38:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:44,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:44,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:44,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:45,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:45,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:45,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:48,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:48,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:38:48,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:38:48,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4625 [2020-10-26 19:38:48,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:48,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:38:48,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:48,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:38:48,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:49,183 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-26 19:38:49,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:49,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:49,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:49,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:49,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:38:49,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:49,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:49,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:49,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:49,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:49,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:49,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:49,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:49,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:49,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:49,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:49,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:49,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:49,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:49,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:38:49,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837808756] [2020-10-26 19:38:49,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:49,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:38:49,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532533988] [2020-10-26 19:38:49,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:38:49,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:49,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:38:49,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:38:49,518 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 15 states. [2020-10-26 19:38:50,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:50,563 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-26 19:38:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:38:50,564 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-26 19:38:50,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:50,565 INFO L225 Difference]: With dead ends: 46 [2020-10-26 19:38:50,565 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:38:50,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:38:50,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:38:50,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-26 19:38:50,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:38:50,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-26 19:38:50,581 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 32 [2020-10-26 19:38:50,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:50,581 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-26 19:38:50,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:38:50,582 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-26 19:38:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:38:50,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:50,584 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:50,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:38:50,584 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:50,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:50,585 INFO L82 PathProgramCache]: Analyzing trace with hash -433053015, now seen corresponding path program 2 times [2020-10-26 19:38:50,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:50,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942831319] [2020-10-26 19:38:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:50,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:55,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:38:55,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:38:55,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:38:55,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:55,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:38:55,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:55,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:38:55,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:55,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:55,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:55,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:55,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:55,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:38:55,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:55,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:55,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:55,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:55,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:38:55,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:55,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:55,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:55,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:55,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:55,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:55,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:55,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:55,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:55,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 19:38:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:55,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942831319] [2020-10-26 19:38:55,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:55,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:38:55,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99258613] [2020-10-26 19:38:55,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:38:55,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:55,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:38:55,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:38:55,902 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 13 states. [2020-10-26 19:38:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:56,458 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-10-26 19:38:56,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:38:56,458 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-26 19:38:56,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:56,460 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:38:56,460 INFO L226 Difference]: Without dead ends: 69 [2020-10-26 19:38:56,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:38:56,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-26 19:38:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-10-26 19:38:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:38:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-26 19:38:56,479 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 35 [2020-10-26 19:38:56,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:56,481 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-26 19:38:56,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:38:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-26 19:38:56,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:38:56,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:56,484 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:56,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:38:56,484 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash -639202741, now seen corresponding path program 3 times [2020-10-26 19:38:56,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:56,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984799547] [2020-10-26 19:38:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:56,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:00,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:39:00,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:39:00,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4258 [2020-10-26 19:39:00,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:00,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:39:00,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:00,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:39:00,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:01,195 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 33 [2020-10-26 19:39:02,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:02,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:02,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:02,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:02,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:39:02,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:02,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:02,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:02,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:02,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:02,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:02,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:02,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:02,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:02,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:02,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:02,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:02,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:02,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:02,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:39:02,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984799547] [2020-10-26 19:39:02,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:02,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:39:02,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700936204] [2020-10-26 19:39:02,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:39:02,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:02,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:39:02,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:39:02,038 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 19 states. [2020-10-26 19:39:02,337 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-26 19:39:02,515 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-26 19:39:03,045 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2020-10-26 19:39:03,261 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-26 19:39:03,480 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-10-26 19:39:03,687 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-26 19:39:04,128 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-26 19:39:04,277 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-26 19:39:04,819 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-26 19:39:05,009 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-26 19:39:05,220 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-26 19:39:05,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:05,419 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-26 19:39:05,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:39:05,420 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-26 19:39:05,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:05,422 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:39:05,422 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:39:05,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=275, Invalid=1365, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:39:05,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:39:05,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2020-10-26 19:39:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:39:05,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-10-26 19:39:05,437 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 37 [2020-10-26 19:39:05,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:05,437 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-10-26 19:39:05,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:39:05,438 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-10-26 19:39:05,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:39:05,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:05,439 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:05,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:39:05,439 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:05,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:05,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1842075536, now seen corresponding path program 4 times [2020-10-26 19:39:05,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:05,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787650588] [2020-10-26 19:39:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:05,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:05,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:05,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:05,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:05,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:06,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:06,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:06,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:06,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:06,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:09,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:10,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:10,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:39:10,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:39:10,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:39:10,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:10,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:39:10,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:10,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:39:10,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:10,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:10,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:10,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:10,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:10,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:10,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:10,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:10,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:10,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:10,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:10,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:10,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:10,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:10,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:10,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:10,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:10,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:10,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:10,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:10,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:10,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:10,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:39:10,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787650588] [2020-10-26 19:39:10,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:10,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:39:10,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921051746] [2020-10-26 19:39:10,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:39:10,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:10,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:39:10,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:39:10,888 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 16 states. [2020-10-26 19:39:11,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:11,799 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-10-26 19:39:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:39:11,799 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-26 19:39:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:11,801 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:39:11,801 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:39:11,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:39:11,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:39:11,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-26 19:39:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 19:39:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-26 19:39:11,815 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 38 [2020-10-26 19:39:11,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:11,815 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-26 19:39:11,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:39:11,815 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-26 19:39:11,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:39:11,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:11,818 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:11,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:39:11,819 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:11,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:11,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1797980308, now seen corresponding path program 5 times [2020-10-26 19:39:11,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:11,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129562098] [2020-10-26 19:39:11,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:11,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:11,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:16,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:39:16,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:39:16,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:39:16,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:16,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:39:16,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:16,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:39:16,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:17,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:17,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:17,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:17,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:17,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:17,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:17,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:17,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:17,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:17,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:17,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:17,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:17,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:17,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:17,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:17,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:17,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:17,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:17,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:17,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:17,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:17,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:39:17,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129562098] [2020-10-26 19:39:17,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:17,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:39:17,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81406914] [2020-10-26 19:39:17,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:39:17,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:17,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:39:17,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:39:17,184 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 16 states. [2020-10-26 19:39:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:18,052 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-26 19:39:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:39:18,053 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-26 19:39:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:18,056 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:39:18,056 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:39:18,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:39:18,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:39:18,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-26 19:39:18,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:39:18,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-10-26 19:39:18,086 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 40 [2020-10-26 19:39:18,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:18,087 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-10-26 19:39:18,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:39:18,087 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-10-26 19:39:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:39:18,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:18,090 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:18,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:39:18,091 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:18,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:18,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1517817098, now seen corresponding path program 6 times [2020-10-26 19:39:18,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:18,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49547292] [2020-10-26 19:39:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:18,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:18,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:18,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:19,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:19,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:22,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:23,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:39:23,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:39:23,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:39:23,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:23,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:39:23,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:23,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:39:23,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:23,678 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 56 [2020-10-26 19:39:23,896 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 49 [2020-10-26 19:39:24,198 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 54 [2020-10-26 19:39:24,359 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-26 19:39:24,743 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-26 19:39:24,912 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-26 19:39:25,301 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2020-10-26 19:39:25,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:25,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:25,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:25,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:25,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:25,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:39:25,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:25,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:25,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:25,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:25,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:25,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:25,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:25,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:25,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:25,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:25,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:25,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:25,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:39:25,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49547292] [2020-10-26 19:39:25,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:25,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:39:25,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114231411] [2020-10-26 19:39:25,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:39:25,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:25,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:39:25,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:39:25,812 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 23 states. [2020-10-26 19:39:26,287 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2020-10-26 19:39:26,511 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-26 19:39:26,781 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2020-10-26 19:39:27,108 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 62 [2020-10-26 19:39:27,312 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2020-10-26 19:39:27,982 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 144 [2020-10-26 19:39:28,308 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 84 [2020-10-26 19:39:28,787 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2020-10-26 19:39:29,104 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-26 19:39:29,307 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-26 19:39:29,651 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-26 19:39:29,936 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-10-26 19:39:30,508 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-26 19:39:31,197 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2020-10-26 19:39:31,578 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-10-26 19:39:31,983 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-26 19:39:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:32,240 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2020-10-26 19:39:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:39:32,243 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-10-26 19:39:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:32,244 INFO L225 Difference]: With dead ends: 83 [2020-10-26 19:39:32,244 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:39:32,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=350, Invalid=2200, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:39:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:39:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2020-10-26 19:39:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:39:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2020-10-26 19:39:32,265 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 42 [2020-10-26 19:39:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:32,266 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2020-10-26 19:39:32,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:39:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2020-10-26 19:39:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:39:32,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:32,269 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:32,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:39:32,270 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:32,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1286510121, now seen corresponding path program 7 times [2020-10-26 19:39:32,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:32,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088466728] [2020-10-26 19:39:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:32,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:32,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:32,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:32,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:32,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:32,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:33,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:33,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:34,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:34,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:34,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:34,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:34,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:34,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:35,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:35,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:37,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:37,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:39:37,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:39:37,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:39:37,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:37,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:39:37,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:37,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:39:37,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:37,895 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-26 19:39:38,063 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-26 19:39:38,235 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2020-10-26 19:39:38,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:38,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:38,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:38,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:38,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:38,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:38,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:38,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:38,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:38,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:38,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:38,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:38,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:38,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:38,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:38,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:38,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:38,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:38,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:38,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:38,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:38,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:39:38,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088466728] [2020-10-26 19:39:38,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:38,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:39:38,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960069550] [2020-10-26 19:39:38,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:39:38,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:38,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:39:38,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:39:38,707 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 21 states. [2020-10-26 19:39:39,190 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-26 19:39:39,366 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-26 19:39:39,721 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-26 19:39:39,869 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-26 19:39:40,386 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-26 19:39:40,602 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-26 19:39:40,841 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-26 19:39:41,210 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-26 19:39:41,574 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-26 19:39:42,012 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-26 19:39:42,241 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-26 19:39:42,465 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-26 19:39:42,682 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-26 19:39:42,952 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-26 19:39:43,211 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-26 19:39:43,529 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-26 19:39:43,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:43,665 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2020-10-26 19:39:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:39:43,666 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2020-10-26 19:39:43,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:43,667 INFO L225 Difference]: With dead ends: 83 [2020-10-26 19:39:43,667 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:39:43,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:39:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:39:43,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-26 19:39:43,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:39:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-26 19:39:43,679 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 43 [2020-10-26 19:39:43,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:43,679 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-26 19:39:43,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:39:43,680 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-26 19:39:43,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:39:43,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:43,681 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:43,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:39:43,681 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:43,681 INFO L82 PathProgramCache]: Analyzing trace with hash 974327885, now seen corresponding path program 8 times [2020-10-26 19:39:43,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:43,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733845281] [2020-10-26 19:39:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:43,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:43,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:43,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:43,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:44,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:44,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:44,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:44,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:44,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:45,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:46,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:46,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:48,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:48,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:39:48,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:39:48,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:39:48,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:39:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:39:48,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:49,244 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 42 [2020-10-26 19:39:49,395 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2020-10-26 19:39:49,549 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2020-10-26 19:39:49,783 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 52 [2020-10-26 19:39:49,945 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-26 19:39:50,355 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2020-10-26 19:39:50,585 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-26 19:39:50,802 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-26 19:39:51,066 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-26 19:39:51,264 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-26 19:39:52,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:52,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:52,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:52,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:52,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:52,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:52,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:52,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:52,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:52,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:52,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:52,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:52,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:52,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:52,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:52,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:52,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:52,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:52,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:52,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:52,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:52,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:52,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733845281] [2020-10-26 19:39:52,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:52,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:39:52,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67412551] [2020-10-26 19:39:52,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:39:52,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:52,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:39:52,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:39:52,186 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 27 states. [2020-10-26 19:39:53,104 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 145 [2020-10-26 19:39:53,796 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 148 [2020-10-26 19:39:54,103 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-10-26 19:39:54,354 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2020-10-26 19:39:55,897 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 238 DAG size of output: 210 [2020-10-26 19:39:56,890 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 166 [2020-10-26 19:39:58,609 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 216 DAG size of output: 183 [2020-10-26 19:39:59,230 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 137 [2020-10-26 19:39:59,597 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-26 19:39:59,850 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-26 19:40:00,220 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2020-10-26 19:40:00,957 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 146 [2020-10-26 19:40:01,188 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 19:40:01,524 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-10-26 19:40:01,799 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-26 19:40:02,152 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-26 19:40:02,851 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-10-26 19:40:03,996 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 155 [2020-10-26 19:40:04,968 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 157 [2020-10-26 19:40:05,987 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 154 [2020-10-26 19:40:06,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:06,197 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-10-26 19:40:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:40:06,198 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2020-10-26 19:40:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:06,200 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:40:06,200 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:40:06,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=419, Invalid=2551, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:40:06,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:40:06,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-10-26 19:40:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:40:06,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-26 19:40:06,214 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 45 [2020-10-26 19:40:06,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:06,215 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-26 19:40:06,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:40:06,215 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-26 19:40:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:40:06,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:06,216 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:06,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:40:06,216 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:06,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:06,216 INFO L82 PathProgramCache]: Analyzing trace with hash -386933268, now seen corresponding path program 9 times [2020-10-26 19:40:06,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:06,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890356599] [2020-10-26 19:40:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:06,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:06,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:06,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:06,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:06,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:06,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:07,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:08,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking...