/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:26:41,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:26:41,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:26:41,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:26:41,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:26:41,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:26:41,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:26:41,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:26:41,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:26:41,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:26:41,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:26:41,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:26:41,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:26:41,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:26:41,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:26:41,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:26:41,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:26:41,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:26:41,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:26:41,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:26:41,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:26:41,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:26:41,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:26:41,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:26:41,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:26:41,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:26:41,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:26:41,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:26:41,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:26:41,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:26:41,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:26:41,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:26:41,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:26:41,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:26:41,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:26:41,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:26:41,817 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:26:41,817 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:26:41,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:26:41,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:26:41,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:26:41,827 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 [2020-10-28 18:26:41,894 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:26:41,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:26:41,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:26:41,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:26:41,899 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:26:41,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:26:41,899 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:26:41,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:26:41,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:26:41,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:26:41,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:26:41,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:26:41,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:26:41,902 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:26:41,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:26:41,902 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:26:41,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:26:41,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:26:41,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:26:41,903 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:26:41,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:26:41,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:26:41,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:26:41,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:26:41,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:26:41,904 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:26:41,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:26:41,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:26:41,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:26:41,905 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:26:42,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:26:42,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:26:42,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:26:42,377 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:26:42,378 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:26:42,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:26:42,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/657197ed6/a207b7c6839a44e0b0a517a3595b6cb9/FLAG522a3afca [2020-10-28 18:26:43,208 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:26:43,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:26:43,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/657197ed6/a207b7c6839a44e0b0a517a3595b6cb9/FLAG522a3afca [2020-10-28 18:26:43,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/657197ed6/a207b7c6839a44e0b0a517a3595b6cb9 [2020-10-28 18:26:43,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:26:43,521 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:26:43,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:26:43,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:26:43,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:26:43,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:26:43" (1/1) ... [2020-10-28 18:26:43,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60899723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:43, skipping insertion in model container [2020-10-28 18:26:43,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:26:43" (1/1) ... [2020-10-28 18:26:43,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:26:43,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:26:44,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:26:44,108 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:26:44,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:26:44,342 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:26:44,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:44 WrapperNode [2020-10-28 18:26:44,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:26:44,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:26:44,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:26:44,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:26:44,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:44" (1/1) ... [2020-10-28 18:26:44,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:44" (1/1) ... [2020-10-28 18:26:44,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:44" (1/1) ... [2020-10-28 18:26:44,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:44" (1/1) ... [2020-10-28 18:26:44,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:44" (1/1) ... [2020-10-28 18:26:44,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:44" (1/1) ... [2020-10-28 18:26:44,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:44" (1/1) ... [2020-10-28 18:26:44,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:26:44,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:26:44,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:26:44,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:26:44,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:44" (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 [2020-10-28 18:26:44,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:26:44,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:26:44,525 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:26:44,526 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:26:44,526 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:26:44,526 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:26:44,526 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:26:44,526 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:26:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:26:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:26:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:26:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:26:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:26:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:26:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:26:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:26:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:26:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:26:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:26:44,529 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:26:44,529 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:26:44,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:26:44,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:26:44,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:26:44,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:26:44,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:26:44,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:26:44,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:26:45,962 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:26:45,962 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:26:45,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:26:45 BoogieIcfgContainer [2020-10-28 18:26:45,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:26:45,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:26:45,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:26:45,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:26:45,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:26:43" (1/3) ... [2020-10-28 18:26:45,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48067c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:26:45, skipping insertion in model container [2020-10-28 18:26:45,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:26:44" (2/3) ... [2020-10-28 18:26:45,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48067c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:26:45, skipping insertion in model container [2020-10-28 18:26:45,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:26:45" (3/3) ... [2020-10-28 18:26:45,974 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:26:45,987 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:26:45,992 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:26:46,007 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:26:46,038 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:26:46,038 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:26:46,038 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:26:46,038 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:26:46,038 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:26:46,039 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:26:46,039 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:26:46,039 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:26:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-10-28 18:26:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 18:26:46,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:46,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:26:46,077 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:46,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:46,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1835724327, now seen corresponding path program 1 times [2020-10-28 18:26:46,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:46,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578387026] [2020-10-28 18:26:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:46,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:46,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:46,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:47,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:47,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:48,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:48,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:48,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:48,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:49,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:49,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:51,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:51,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 18:26:51,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:26:51,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:26:51,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:51,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:51,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:26:51,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:26:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 18:26:51,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:26:52,112 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:26:52,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:26:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:52,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:52,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:52,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:26:52,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:26:52,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:26:52,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:52,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:52,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:26:52,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:26:52,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:26:52,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:26:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:26:52,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578387026] [2020-10-28 18:26:52,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:26:52,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:26:52,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374304580] [2020-10-28 18:26:52,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:26:52,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:26:52,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:26:52,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:26:52,196 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 7 states. [2020-10-28 18:26:52,775 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:26:55,175 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:26:56,591 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-28 18:26:56,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:26:56,727 INFO L93 Difference]: Finished difference Result 684 states and 1132 transitions. [2020-10-28 18:26:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:26:56,730 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-10-28 18:26:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:26:56,749 INFO L225 Difference]: With dead ends: 684 [2020-10-28 18:26:56,750 INFO L226 Difference]: Without dead ends: 535 [2020-10-28 18:26:56,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:26:56,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-10-28 18:26:56,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 254. [2020-10-28 18:26:56,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-28 18:26:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 331 transitions. [2020-10-28 18:26:56,865 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 331 transitions. Word has length 51 [2020-10-28 18:26:56,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:26:56,866 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 331 transitions. [2020-10-28 18:26:56,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:26:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 331 transitions. [2020-10-28 18:26:56,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 18:26:56,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:56,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:26:56,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:26:56,871 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:56,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:56,872 INFO L82 PathProgramCache]: Analyzing trace with hash 984145560, now seen corresponding path program 1 times [2020-10-28 18:26:56,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:56,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351931745] [2020-10-28 18:26:56,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:56,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:56,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:57,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:57,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:57,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:57,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:57,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:58,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:58,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:00,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:00,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:01,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:01,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 18:27:01,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:27:01,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 18:27:01,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:01,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:01,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:27:01,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:27:01,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 18:27:01,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:02,635 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:27:02,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:02,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:02,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:02,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:02,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:02,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:27:02,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:02,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:02,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:02,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:02,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:02,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:02,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351931745] [2020-10-28 18:27:02,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:02,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:27:02,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85507920] [2020-10-28 18:27:02,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:27:02,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:02,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:27:02,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:27:02,701 INFO L87 Difference]: Start difference. First operand 254 states and 331 transitions. Second operand 8 states. [2020-10-28 18:27:03,829 WARN L193 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 177 [2020-10-28 18:27:06,096 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:27:08,467 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 179 [2020-10-28 18:27:08,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:08,590 INFO L93 Difference]: Finished difference Result 1254 states and 1832 transitions. [2020-10-28 18:27:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 18:27:08,591 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-10-28 18:27:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:08,600 INFO L225 Difference]: With dead ends: 1254 [2020-10-28 18:27:08,601 INFO L226 Difference]: Without dead ends: 1128 [2020-10-28 18:27:08,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2020-10-28 18:27:08,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2020-10-28 18:27:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 261. [2020-10-28 18:27:08,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-28 18:27:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 338 transitions. [2020-10-28 18:27:08,672 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 338 transitions. Word has length 51 [2020-10-28 18:27:08,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:08,673 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 338 transitions. [2020-10-28 18:27:08,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:27:08,673 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 338 transitions. [2020-10-28 18:27:08,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 18:27:08,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:08,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:08,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:27:08,687 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:08,688 INFO L82 PathProgramCache]: Analyzing trace with hash -317377367, now seen corresponding path program 1 times [2020-10-28 18:27:08,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:08,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464956637] [2020-10-28 18:27:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:08,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:08,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:08,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:08,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:09,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:09,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:10,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:10,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:10,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:10,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:11,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:11,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:11,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:12,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:12,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:12,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:13,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:13,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:13,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:13,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 18:27:13,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 18:27:13,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 18:27:13,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:13,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:13,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:27:13,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:27:13,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 18:27:13,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:14,309 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:27:14,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:14,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:14,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:14,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:14,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:14,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 18:27:14,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:14,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:14,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:14,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:27:14,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:14,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464956637] [2020-10-28 18:27:14,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:14,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:27:14,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114790852] [2020-10-28 18:27:14,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:27:14,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:14,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:27:14,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:27:14,386 INFO L87 Difference]: Start difference. First operand 261 states and 338 transitions. Second operand 7 states. [2020-10-28 18:27:14,875 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:27:16,509 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:27:17,616 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-28 18:27:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:17,770 INFO L93 Difference]: Finished difference Result 712 states and 1015 transitions. [2020-10-28 18:27:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:27:17,771 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-28 18:27:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:17,776 INFO L225 Difference]: With dead ends: 712 [2020-10-28 18:27:17,776 INFO L226 Difference]: Without dead ends: 606 [2020-10-28 18:27:17,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-10-28 18:27:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-10-28 18:27:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 292. [2020-10-28 18:27:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-28 18:27:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 375 transitions. [2020-10-28 18:27:17,825 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 375 transitions. Word has length 52 [2020-10-28 18:27:17,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:17,828 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 375 transitions. [2020-10-28 18:27:17,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:27:17,828 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 375 transitions. [2020-10-28 18:27:17,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 18:27:17,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:17,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:17,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:27:17,831 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:17,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2094149536, now seen corresponding path program 1 times [2020-10-28 18:27:17,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:17,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858763402] [2020-10-28 18:27:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:17,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:17,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:17,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:18,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:18,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:18,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:18,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:19,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:19,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:20,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:21,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:21,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:21,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:21,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:21,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:21,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:22,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:22,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:22,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:22,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:22,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:22,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 18:27:22,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-28 18:27:22,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:27:22,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:22,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:27:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:27:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 18:27:22,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:23,437 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:27:23,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:23,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:23,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:23,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:23,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:23,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:27:23,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:23,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:23,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:23,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:23,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:23,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:23,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858763402] [2020-10-28 18:27:23,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:23,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:27:23,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646099273] [2020-10-28 18:27:23,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:27:23,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:23,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:27:23,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:27:23,484 INFO L87 Difference]: Start difference. First operand 292 states and 375 transitions. Second operand 8 states. [2020-10-28 18:27:24,034 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:27:25,834 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:27:26,495 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:27:27,441 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-28 18:27:27,959 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:27:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:28,046 INFO L93 Difference]: Finished difference Result 771 states and 1069 transitions. [2020-10-28 18:27:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 18:27:28,047 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-28 18:27:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:28,052 INFO L225 Difference]: With dead ends: 771 [2020-10-28 18:27:28,052 INFO L226 Difference]: Without dead ends: 670 [2020-10-28 18:27:28,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-10-28 18:27:28,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-10-28 18:27:28,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 300. [2020-10-28 18:27:28,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-28 18:27:28,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 386 transitions. [2020-10-28 18:27:28,098 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 386 transitions. Word has length 52 [2020-10-28 18:27:28,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:28,098 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 386 transitions. [2020-10-28 18:27:28,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:27:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 386 transitions. [2020-10-28 18:27:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 18:27:28,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:28,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:28,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:27:28,100 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:28,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:28,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1993602881, now seen corresponding path program 1 times [2020-10-28 18:27:28,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:28,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304209355] [2020-10-28 18:27:28,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:28,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:28,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:28,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:28,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:28,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:28,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:28,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:28,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:29,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:29,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:31,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:31,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:31,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:31,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:31,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:32,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:32,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:33,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:33,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 18:27:33,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:27:33,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:27:33,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:33,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:33,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:27:33,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:27:33,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 18:27:33,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:33,797 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:27:33,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:33,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:33,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:33,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:33,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:33,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 18:27:33,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:33,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:33,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:33,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:33,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:27:33,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:33,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304209355] [2020-10-28 18:27:33,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:33,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:27:33,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002676597] [2020-10-28 18:27:33,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:27:33,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:33,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:27:33,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:27:33,865 INFO L87 Difference]: Start difference. First operand 300 states and 386 transitions. Second operand 8 states. [2020-10-28 18:27:34,367 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:27:35,887 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:27:37,523 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:27:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:37,837 INFO L93 Difference]: Finished difference Result 862 states and 1225 transitions. [2020-10-28 18:27:37,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:27:37,837 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-28 18:27:37,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:37,845 INFO L225 Difference]: With dead ends: 862 [2020-10-28 18:27:37,845 INFO L226 Difference]: Without dead ends: 739 [2020-10-28 18:27:37,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:27:37,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2020-10-28 18:27:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 316. [2020-10-28 18:27:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-28 18:27:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 406 transitions. [2020-10-28 18:27:37,884 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 406 transitions. Word has length 52 [2020-10-28 18:27:37,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:37,884 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 406 transitions. [2020-10-28 18:27:37,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:27:37,885 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 406 transitions. [2020-10-28 18:27:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 18:27:37,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:37,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:37,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:27:37,886 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:37,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:37,887 INFO L82 PathProgramCache]: Analyzing trace with hash 725720351, now seen corresponding path program 1 times [2020-10-28 18:27:37,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:37,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480535960] [2020-10-28 18:27:37,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:37,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:37,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:37,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:39,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:39,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:39,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:39,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:40,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:40,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:42,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:42,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:42,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:42,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:42,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:42,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:42,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:42,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:42,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 18:27:42,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-28 18:27:42,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:27:42,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:42,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:42,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:27:42,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:27:42,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:27:42,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:43,637 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:27:43,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:43,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:43,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:43,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:43,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:43,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 18:27:43,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:43,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:43,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:27:43,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:43,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:27:43,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:43,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480535960] [2020-10-28 18:27:43,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:43,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:27:43,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302504314] [2020-10-28 18:27:43,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:27:43,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:43,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:27:43,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:27:43,727 INFO L87 Difference]: Start difference. First operand 316 states and 406 transitions. Second operand 8 states. [2020-10-28 18:27:44,226 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:27:45,817 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-28 18:27:46,722 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:27:46,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:46,813 INFO L93 Difference]: Finished difference Result 448 states and 590 transitions. [2020-10-28 18:27:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:27:46,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-28 18:27:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:46,817 INFO L225 Difference]: With dead ends: 448 [2020-10-28 18:27:46,818 INFO L226 Difference]: Without dead ends: 434 [2020-10-28 18:27:46,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:27:46,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-28 18:27:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 318. [2020-10-28 18:27:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-28 18:27:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 408 transitions. [2020-10-28 18:27:46,850 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 408 transitions. Word has length 52 [2020-10-28 18:27:46,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:46,850 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 408 transitions. [2020-10-28 18:27:46,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:27:46,850 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 408 transitions. [2020-10-28 18:27:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 18:27:46,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:46,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:46,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:27:46,852 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:46,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:46,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1187259699, now seen corresponding path program 1 times [2020-10-28 18:27:46,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:46,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213324762] [2020-10-28 18:27:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:46,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:46,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:46,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:47,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:47,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:47,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:47,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:47,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:47,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:51,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:51,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 18:27:51,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:27:51,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:27:51,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:51,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:51,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:27:51,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:27:51,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 18:27:51,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:52,588 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:27:52,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:52,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:52,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:52,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:52,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:52,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:27:52,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:52,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:52,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:52,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:52,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:52,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:52,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213324762] [2020-10-28 18:27:52,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:52,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:27:52,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803826202] [2020-10-28 18:27:52,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:27:52,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:52,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:27:52,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:27:52,645 INFO L87 Difference]: Start difference. First operand 318 states and 408 transitions. Second operand 8 states. [2020-10-28 18:27:53,205 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 18:27:54,634 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 18:27:55,293 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 18:27:55,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:55,909 INFO L93 Difference]: Finished difference Result 567 states and 761 transitions. [2020-10-28 18:27:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:27:55,910 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-28 18:27:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:55,913 INFO L225 Difference]: With dead ends: 567 [2020-10-28 18:27:55,913 INFO L226 Difference]: Without dead ends: 436 [2020-10-28 18:27:55,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-28 18:27:55,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-28 18:27:55,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 264. [2020-10-28 18:27:55,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-28 18:27:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 333 transitions. [2020-10-28 18:27:55,945 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 333 transitions. Word has length 53 [2020-10-28 18:27:55,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:55,945 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 333 transitions. [2020-10-28 18:27:55,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:27:55,945 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 333 transitions. [2020-10-28 18:27:55,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 18:27:55,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:55,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:55,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:27:55,947 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:55,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:55,947 INFO L82 PathProgramCache]: Analyzing trace with hash 961004469, now seen corresponding path program 1 times [2020-10-28 18:27:55,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:55,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702432009] [2020-10-28 18:27:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:55,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:56,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:56,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:56,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:56,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:56,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:56,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:56,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:56,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:56,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:57,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:58,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:58,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:59,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:59,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:59,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:00,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:00,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:00,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:00,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 18:28:00,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 18:28:00,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:28:00,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:00,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:00,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:28:00,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:00,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 18:28:00,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:01,510 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:28:01,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:01,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:01,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:01,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:01,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:01,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:28:01,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:01,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:01,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:01,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:01,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:01,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:01,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702432009] [2020-10-28 18:28:01,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:01,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:28:01,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66569255] [2020-10-28 18:28:01,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:28:01,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:01,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:28:01,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:28:01,565 INFO L87 Difference]: Start difference. First operand 264 states and 333 transitions. Second operand 8 states. [2020-10-28 18:28:02,082 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:28:03,457 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:28:04,661 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:28:04,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:04,848 INFO L93 Difference]: Finished difference Result 848 states and 1182 transitions. [2020-10-28 18:28:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:28:04,849 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-28 18:28:04,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:04,854 INFO L225 Difference]: With dead ends: 848 [2020-10-28 18:28:04,854 INFO L226 Difference]: Without dead ends: 710 [2020-10-28 18:28:04,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:28:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2020-10-28 18:28:04,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 278. [2020-10-28 18:28:04,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-28 18:28:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 351 transitions. [2020-10-28 18:28:04,900 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 351 transitions. Word has length 53 [2020-10-28 18:28:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:04,900 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 351 transitions. [2020-10-28 18:28:04,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:28:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 351 transitions. [2020-10-28 18:28:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 18:28:04,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:04,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:04,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:28:04,902 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:04,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:04,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1854663768, now seen corresponding path program 1 times [2020-10-28 18:28:04,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:04,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495351491] [2020-10-28 18:28:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:04,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:04,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:05,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:05,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:05,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:05,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:05,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:06,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:06,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:09,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:09,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 18:28:09,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:28:09,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:28:09,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:09,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:09,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:28:09,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:09,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 18:28:09,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:10,459 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:28:10,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:10,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:10,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:10,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:10,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:10,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 18:28:10,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:10,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:10,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:10,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:10,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:10,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:10,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495351491] [2020-10-28 18:28:10,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:10,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:28:10,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760919031] [2020-10-28 18:28:10,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:28:10,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:10,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:28:10,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:28:10,521 INFO L87 Difference]: Start difference. First operand 278 states and 351 transitions. Second operand 6 states. [2020-10-28 18:28:11,084 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:28:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:11,955 INFO L93 Difference]: Finished difference Result 427 states and 558 transitions. [2020-10-28 18:28:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:28:11,956 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-28 18:28:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:11,958 INFO L225 Difference]: With dead ends: 427 [2020-10-28 18:28:11,958 INFO L226 Difference]: Without dead ends: 241 [2020-10-28 18:28:11,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:28:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-28 18:28:12,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2020-10-28 18:28:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-28 18:28:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 307 transitions. [2020-10-28 18:28:12,007 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 307 transitions. Word has length 53 [2020-10-28 18:28:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:12,007 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 307 transitions. [2020-10-28 18:28:12,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:28:12,007 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 307 transitions. [2020-10-28 18:28:12,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 18:28:12,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:12,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:12,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:28:12,009 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:12,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:12,009 INFO L82 PathProgramCache]: Analyzing trace with hash -104077909, now seen corresponding path program 1 times [2020-10-28 18:28:12,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:12,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830221146] [2020-10-28 18:28:12,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:12,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:12,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:12,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:12,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:12,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:12,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:12,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:13,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:14,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:14,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:14,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:14,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:15,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:16,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:17,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:17,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 18:28:17,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:28:17,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:28:17,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:17,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:17,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:28:17,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:28:17,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 18:28:17,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:17,588 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:28:17,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:17,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:17,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:17,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:17,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:17,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:28:17,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:17,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:17,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:17,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:17,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:17,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:17,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830221146] [2020-10-28 18:28:17,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:17,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:28:17,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429417666] [2020-10-28 18:28:17,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:28:17,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:17,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:28:17,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:28:17,625 INFO L87 Difference]: Start difference. First operand 241 states and 307 transitions. Second operand 7 states. [2020-10-28 18:28:18,215 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-28 18:28:19,380 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:28:19,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:19,777 INFO L93 Difference]: Finished difference Result 400 states and 520 transitions. [2020-10-28 18:28:19,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:28:19,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-28 18:28:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:19,781 INFO L225 Difference]: With dead ends: 400 [2020-10-28 18:28:19,781 INFO L226 Difference]: Without dead ends: 251 [2020-10-28 18:28:19,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:28:19,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-28 18:28:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 241. [2020-10-28 18:28:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-28 18:28:19,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 303 transitions. [2020-10-28 18:28:19,814 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 303 transitions. Word has length 54 [2020-10-28 18:28:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:19,815 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 303 transitions. [2020-10-28 18:28:19,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:28:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 303 transitions. [2020-10-28 18:28:19,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:28:19,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:19,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:19,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:28:19,816 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:19,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:19,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1705406796, now seen corresponding path program 1 times [2020-10-28 18:28:19,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:19,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927657176] [2020-10-28 18:28:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:19,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:19,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:20,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:20,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:28:20,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:28:20,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 883 [2020-10-28 18:28:20,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:20,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:20,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:28:20,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:20,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 18:28:20,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:21,233 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:28:21,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:21,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:21,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:21,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:21,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:21,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:28:21,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:21,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:21,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:21,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:21,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:21,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:21,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927657176] [2020-10-28 18:28:21,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:21,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:28:21,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944715470] [2020-10-28 18:28:21,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:28:21,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:21,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:28:21,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:28:21,272 INFO L87 Difference]: Start difference. First operand 241 states and 303 transitions. Second operand 6 states. [2020-10-28 18:28:21,837 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:28:22,864 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:28:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:23,277 INFO L93 Difference]: Finished difference Result 499 states and 662 transitions. [2020-10-28 18:28:23,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:28:23,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 18:28:23,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:23,279 INFO L225 Difference]: With dead ends: 499 [2020-10-28 18:28:23,280 INFO L226 Difference]: Without dead ends: 345 [2020-10-28 18:28:23,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:28:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-28 18:28:23,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 321. [2020-10-28 18:28:23,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-28 18:28:23,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 430 transitions. [2020-10-28 18:28:23,333 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 430 transitions. Word has length 56 [2020-10-28 18:28:23,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:23,333 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 430 transitions. [2020-10-28 18:28:23,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:28:23,333 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 430 transitions. [2020-10-28 18:28:23,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:28:23,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:23,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:23,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:28:23,335 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:23,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:23,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1440500839, now seen corresponding path program 1 times [2020-10-28 18:28:23,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:23,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781124776] [2020-10-28 18:28:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:23,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:23,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:23,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:23,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:23,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:23,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:24,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:24,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:24,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:24,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:27,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:27,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:28:27,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:28:27,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4322 [2020-10-28 18:28:27,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:27,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:28:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 18:28:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 18:28:27,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:28,187 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:28:28,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:28,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:28,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:28,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:28,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:28,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:28:28,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:28,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:28,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:28,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781124776] [2020-10-28 18:28:28,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:28,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:28:28,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544733984] [2020-10-28 18:28:28,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:28:28,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:28,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:28:28,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:28:28,214 INFO L87 Difference]: Start difference. First operand 321 states and 430 transitions. Second operand 6 states. [2020-10-28 18:28:28,734 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:28:31,089 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:28:31,622 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:28:31,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:31,787 INFO L93 Difference]: Finished difference Result 1801 states and 2606 transitions. [2020-10-28 18:28:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:28:31,788 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 18:28:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:31,794 INFO L225 Difference]: With dead ends: 1801 [2020-10-28 18:28:31,794 INFO L226 Difference]: Without dead ends: 1622 [2020-10-28 18:28:31,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:28:31,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2020-10-28 18:28:31,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 883. [2020-10-28 18:28:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-10-28 18:28:31,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1250 transitions. [2020-10-28 18:28:31,968 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1250 transitions. Word has length 56 [2020-10-28 18:28:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:31,969 INFO L481 AbstractCegarLoop]: Abstraction has 883 states and 1250 transitions. [2020-10-28 18:28:31,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:28:31,969 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1250 transitions. [2020-10-28 18:28:31,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:28:31,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:31,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:31,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:28:31,970 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:31,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:31,971 INFO L82 PathProgramCache]: Analyzing trace with hash 867709920, now seen corresponding path program 1 times [2020-10-28 18:28:31,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:31,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142177271] [2020-10-28 18:28:31,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:32,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:32,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:32,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:32,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:32,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:32,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:33,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:33,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:34,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:34,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:28:34,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:28:34,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2637 [2020-10-28 18:28:34,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:34,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:34,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:28:34,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:28:34,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:28:34,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:35,266 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:28:35,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:35,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:35,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:35,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:35,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:35,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:28:35,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:35,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:35,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:35,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:35,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:35,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:35,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142177271] [2020-10-28 18:28:35,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:35,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:28:35,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703110871] [2020-10-28 18:28:35,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:28:35,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:35,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:28:35,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:28:35,310 INFO L87 Difference]: Start difference. First operand 883 states and 1250 transitions. Second operand 9 states. [2020-10-28 18:28:35,866 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-28 18:28:37,160 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 18:28:37,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:37,636 INFO L93 Difference]: Finished difference Result 1057 states and 1504 transitions. [2020-10-28 18:28:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:28:37,636 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-28 18:28:37,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:37,640 INFO L225 Difference]: With dead ends: 1057 [2020-10-28 18:28:37,641 INFO L226 Difference]: Without dead ends: 1052 [2020-10-28 18:28:37,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:28:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2020-10-28 18:28:37,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 880. [2020-10-28 18:28:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2020-10-28 18:28:37,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1246 transitions. [2020-10-28 18:28:37,767 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1246 transitions. Word has length 56 [2020-10-28 18:28:37,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:37,768 INFO L481 AbstractCegarLoop]: Abstraction has 880 states and 1246 transitions. [2020-10-28 18:28:37,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:28:37,768 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1246 transitions. [2020-10-28 18:28:37,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:28:37,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:37,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:37,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:28:37,769 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:37,770 INFO L82 PathProgramCache]: Analyzing trace with hash 368085089, now seen corresponding path program 1 times [2020-10-28 18:28:37,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:37,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854295761] [2020-10-28 18:28:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:37,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:37,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:37,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:38,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:40,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:40,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:28:40,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:28:40,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2369 [2020-10-28 18:28:40,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:40,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:40,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 18:28:40,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:40,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:28:40,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:40,865 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:28:40,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:40,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:40,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:40,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:40,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:40,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:28:40,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:40,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:40,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:40,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:40,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:40,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:40,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854295761] [2020-10-28 18:28:40,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:40,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:28:40,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692000240] [2020-10-28 18:28:40,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 18:28:40,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:40,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 18:28:40,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:28:40,914 INFO L87 Difference]: Start difference. First operand 880 states and 1246 transitions. Second operand 11 states. [2020-10-28 18:28:41,596 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 18:28:43,176 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:28:44,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:44,678 INFO L93 Difference]: Finished difference Result 2774 states and 4025 transitions. [2020-10-28 18:28:44,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:28:44,681 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-28 18:28:44,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:44,689 INFO L225 Difference]: With dead ends: 2774 [2020-10-28 18:28:44,689 INFO L226 Difference]: Without dead ends: 2078 [2020-10-28 18:28:44,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2020-10-28 18:28:44,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2020-10-28 18:28:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 880. [2020-10-28 18:28:44,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2020-10-28 18:28:44,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1244 transitions. [2020-10-28 18:28:44,855 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1244 transitions. Word has length 57 [2020-10-28 18:28:44,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:44,855 INFO L481 AbstractCegarLoop]: Abstraction has 880 states and 1244 transitions. [2020-10-28 18:28:44,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 18:28:44,855 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1244 transitions. [2020-10-28 18:28:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:28:44,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:44,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:44,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:28:44,857 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:44,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:44,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1067713812, now seen corresponding path program 1 times [2020-10-28 18:28:44,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:44,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31602596] [2020-10-28 18:28:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:44,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:44,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:45,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:45,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:45,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:45,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:45,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:45,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:46,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:46,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:46,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:46,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:46,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:49,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:49,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:28:49,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:28:49,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:28:49,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:49,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:49,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:28:49,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:49,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:28:49,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:50,530 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:28:50,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:50,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:50,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:50,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:50,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:50,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:28:50,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:50,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:50,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:50,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:50,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:50,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:50,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31602596] [2020-10-28 18:28:50,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:50,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:28:50,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335972914] [2020-10-28 18:28:50,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:28:50,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:50,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:28:50,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:28:50,586 INFO L87 Difference]: Start difference. First operand 880 states and 1244 transitions. Second operand 10 states. [2020-10-28 18:28:51,239 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 18:28:52,453 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-28 18:28:53,008 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:28:54,102 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:28:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:54,179 INFO L93 Difference]: Finished difference Result 1064 states and 1511 transitions. [2020-10-28 18:28:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:28:54,180 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-28 18:28:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:54,183 INFO L225 Difference]: With dead ends: 1064 [2020-10-28 18:28:54,183 INFO L226 Difference]: Without dead ends: 661 [2020-10-28 18:28:54,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2020-10-28 18:28:54,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-10-28 18:28:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 486. [2020-10-28 18:28:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2020-10-28 18:28:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 672 transitions. [2020-10-28 18:28:54,258 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 672 transitions. Word has length 57 [2020-10-28 18:28:54,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:54,259 INFO L481 AbstractCegarLoop]: Abstraction has 486 states and 672 transitions. [2020-10-28 18:28:54,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:28:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 672 transitions. [2020-10-28 18:28:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:28:54,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:54,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-28 18:28:54,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:28:54,260 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:54,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:54,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1875712707, now seen corresponding path program 1 times [2020-10-28 18:28:54,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:54,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649496199] [2020-10-28 18:28:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:54,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:54,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:54,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:54,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:54,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:55,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:57,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:57,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:28:57,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:28:57,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2857 [2020-10-28 18:28:57,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:57,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:57,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:28:57,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:28:57,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 18:28:57,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:57,775 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:28:57,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:57,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:57,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:57,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:57,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:57,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:28:57,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:57,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:57,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:28:57,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:57,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:28:57,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:28:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:28:57,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649496199] [2020-10-28 18:28:57,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:57,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:28:57,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024678538] [2020-10-28 18:28:57,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:28:57,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:57,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:28:57,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:28:57,823 INFO L87 Difference]: Start difference. First operand 486 states and 672 transitions. Second operand 10 states. [2020-10-28 18:28:58,505 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 18:28:59,803 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-28 18:29:00,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:00,272 INFO L93 Difference]: Finished difference Result 845 states and 1201 transitions. [2020-10-28 18:29:00,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:29:00,274 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-28 18:29:00,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:00,276 INFO L225 Difference]: With dead ends: 845 [2020-10-28 18:29:00,276 INFO L226 Difference]: Without dead ends: 486 [2020-10-28 18:29:00,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2020-10-28 18:29:00,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-10-28 18:29:00,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 486. [2020-10-28 18:29:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2020-10-28 18:29:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 671 transitions. [2020-10-28 18:29:00,349 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 671 transitions. Word has length 58 [2020-10-28 18:29:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:00,350 INFO L481 AbstractCegarLoop]: Abstraction has 486 states and 671 transitions. [2020-10-28 18:29:00,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:29:00,350 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 671 transitions. [2020-10-28 18:29:00,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:29:00,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:00,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-28 18:29:00,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:29:00,351 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:00,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:00,351 INFO L82 PathProgramCache]: Analyzing trace with hash 795371964, now seen corresponding path program 1 times [2020-10-28 18:29:00,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:00,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708035136] [2020-10-28 18:29:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:00,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:00,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:00,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:00,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:01,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:01,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:29:01,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:29:01,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1105 [2020-10-28 18:29:01,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:01,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:01,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:29:01,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:29:01,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 18:29:01,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:02,115 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:29:02,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:02,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:02,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:02,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:02,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:02,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:29:02,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:02,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:02,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:02,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:02,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:02,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:02,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708035136] [2020-10-28 18:29:02,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:02,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:29:02,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087561666] [2020-10-28 18:29:02,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:29:02,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:02,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:29:02,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:29:02,157 INFO L87 Difference]: Start difference. First operand 486 states and 671 transitions. Second operand 9 states. [2020-10-28 18:29:02,765 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-28 18:29:04,063 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 18:29:05,250 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:29:05,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:05,285 INFO L93 Difference]: Finished difference Result 491 states and 674 transitions. [2020-10-28 18:29:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:29:05,286 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-28 18:29:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:05,288 INFO L225 Difference]: With dead ends: 491 [2020-10-28 18:29:05,289 INFO L226 Difference]: Without dead ends: 484 [2020-10-28 18:29:05,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:29:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-10-28 18:29:05,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 481. [2020-10-28 18:29:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-28 18:29:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 662 transitions. [2020-10-28 18:29:05,386 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 662 transitions. Word has length 59 [2020-10-28 18:29:05,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:05,386 INFO L481 AbstractCegarLoop]: Abstraction has 481 states and 662 transitions. [2020-10-28 18:29:05,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:29:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 662 transitions. [2020-10-28 18:29:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:29:05,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:05,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-28 18:29:05,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:29:05,388 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:05,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:05,388 INFO L82 PathProgramCache]: Analyzing trace with hash -113879204, now seen corresponding path program 1 times [2020-10-28 18:29:05,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:05,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625593179] [2020-10-28 18:29:05,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:05,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:05,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:05,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:05,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:06,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:06,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:29:06,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:29:06,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1310 [2020-10-28 18:29:06,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:06,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:06,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:29:06,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:29:06,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 18:29:06,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:07,391 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:29:07,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:07,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:07,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:07,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:07,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:07,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:29:07,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:07,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:07,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:07,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625593179] [2020-10-28 18:29:07,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:07,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:29:07,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670940702] [2020-10-28 18:29:07,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:29:07,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:07,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:29:07,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:29:07,422 INFO L87 Difference]: Start difference. First operand 481 states and 662 transitions. Second operand 9 states. [2020-10-28 18:29:08,074 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-28 18:29:09,669 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 18:29:09,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:09,681 INFO L93 Difference]: Finished difference Result 483 states and 663 transitions. [2020-10-28 18:29:09,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:29:09,683 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-28 18:29:09,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:09,685 INFO L225 Difference]: With dead ends: 483 [2020-10-28 18:29:09,685 INFO L226 Difference]: Without dead ends: 470 [2020-10-28 18:29:09,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-28 18:29:09,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-10-28 18:29:09,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2020-10-28 18:29:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2020-10-28 18:29:09,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 648 transitions. [2020-10-28 18:29:09,766 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 648 transitions. Word has length 59 [2020-10-28 18:29:09,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:09,766 INFO L481 AbstractCegarLoop]: Abstraction has 470 states and 648 transitions. [2020-10-28 18:29:09,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:29:09,766 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 648 transitions. [2020-10-28 18:29:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 18:29:09,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:09,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:09,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 18:29:09,769 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:09,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1275383932, now seen corresponding path program 1 times [2020-10-28 18:29:09,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:09,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670311507] [2020-10-28 18:29:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:09,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:09,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:09,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:09,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:09,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:14,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:14,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 18:29:14,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:29:14,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4775 [2020-10-28 18:29:14,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:14,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:14,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:14,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 18:29:14,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:29:14,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:15,106 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:29:15,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:15,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:15,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:15,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:15,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:15,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:29:15,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:15,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:15,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:15,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:15,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:15,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:15,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670311507] [2020-10-28 18:29:15,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:15,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:29:15,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478031992] [2020-10-28 18:29:15,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:29:15,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:15,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:29:15,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:29:15,135 INFO L87 Difference]: Start difference. First operand 470 states and 648 transitions. Second operand 4 states. [2020-10-28 18:29:15,680 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:29:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:16,380 INFO L93 Difference]: Finished difference Result 1108 states and 1588 transitions. [2020-10-28 18:29:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:29:16,381 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-28 18:29:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:16,385 INFO L225 Difference]: With dead ends: 1108 [2020-10-28 18:29:16,385 INFO L226 Difference]: Without dead ends: 773 [2020-10-28 18:29:16,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:29:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2020-10-28 18:29:16,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 770. [2020-10-28 18:29:16,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2020-10-28 18:29:16,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1076 transitions. [2020-10-28 18:29:16,557 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1076 transitions. Word has length 77 [2020-10-28 18:29:16,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:16,557 INFO L481 AbstractCegarLoop]: Abstraction has 770 states and 1076 transitions. [2020-10-28 18:29:16,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:29:16,557 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1076 transitions. [2020-10-28 18:29:16,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 18:29:16,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:16,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:16,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 18:29:16,559 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:16,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:16,560 INFO L82 PathProgramCache]: Analyzing trace with hash 427934866, now seen corresponding path program 1 times [2020-10-28 18:29:16,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:16,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526757330] [2020-10-28 18:29:16,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:16,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:16,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:16,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:16,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:16,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:16,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:17,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:17,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:17,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:17,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:17,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:18,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:18,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:18,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:19,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:21,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:21,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 18:29:21,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:29:21,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:29:21,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:21,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:21,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:21,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 18:29:21,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 18:29:21,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:22,108 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:29:22,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:22,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:22,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:22,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:22,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:22,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:29:22,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:22,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:22,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:22,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:22,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:22,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:22,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526757330] [2020-10-28 18:29:22,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:22,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:29:22,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059963491] [2020-10-28 18:29:22,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:29:22,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:22,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:29:22,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:29:22,154 INFO L87 Difference]: Start difference. First operand 770 states and 1076 transitions. Second operand 4 states. [2020-10-28 18:29:22,741 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:29:23,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:23,686 INFO L93 Difference]: Finished difference Result 1976 states and 2824 transitions. [2020-10-28 18:29:23,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:29:23,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-28 18:29:23,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:23,692 INFO L225 Difference]: With dead ends: 1976 [2020-10-28 18:29:23,692 INFO L226 Difference]: Without dead ends: 1341 [2020-10-28 18:29:23,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:29:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2020-10-28 18:29:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1266. [2020-10-28 18:29:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1266 states. [2020-10-28 18:29:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1788 transitions. [2020-10-28 18:29:23,998 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1788 transitions. Word has length 79 [2020-10-28 18:29:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:23,998 INFO L481 AbstractCegarLoop]: Abstraction has 1266 states and 1788 transitions. [2020-10-28 18:29:23,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:29:23,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1788 transitions. [2020-10-28 18:29:24,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 18:29:24,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:24,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:24,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 18:29:24,005 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:24,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:24,005 INFO L82 PathProgramCache]: Analyzing trace with hash 151756763, now seen corresponding path program 1 times [2020-10-28 18:29:24,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:24,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359912757] [2020-10-28 18:29:24,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:24,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:24,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:24,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:24,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:24,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:24,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:24,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:25,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:29,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:29,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 18:29:29,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:29:29,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:29:29,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:29,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:29,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:29,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 18:29:29,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 18:29:29,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:29,542 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:29:29,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:29,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:29,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:29,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:29,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:29,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:29:29,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:29,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:29,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:29,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:29,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:29,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:29,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359912757] [2020-10-28 18:29:29,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:29,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:29:29,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666508894] [2020-10-28 18:29:29,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:29:29,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:29,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:29:29,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:29:29,575 INFO L87 Difference]: Start difference. First operand 1266 states and 1788 transitions. Second operand 4 states. [2020-10-28 18:29:30,122 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:29:31,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:31,011 INFO L93 Difference]: Finished difference Result 2996 states and 4308 transitions. [2020-10-28 18:29:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:29:31,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 18:29:31,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:31,018 INFO L225 Difference]: With dead ends: 2996 [2020-10-28 18:29:31,018 INFO L226 Difference]: Without dead ends: 1865 [2020-10-28 18:29:31,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:29:31,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2020-10-28 18:29:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1862. [2020-10-28 18:29:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1862 states. [2020-10-28 18:29:31,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2632 transitions. [2020-10-28 18:29:31,344 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2632 transitions. Word has length 80 [2020-10-28 18:29:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:31,345 INFO L481 AbstractCegarLoop]: Abstraction has 1862 states and 2632 transitions. [2020-10-28 18:29:31,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:29:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2632 transitions. [2020-10-28 18:29:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 18:29:31,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:31,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:31,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 18:29:31,347 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:31,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:31,348 INFO L82 PathProgramCache]: Analyzing trace with hash -389223876, now seen corresponding path program 1 times [2020-10-28 18:29:31,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:31,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974012210] [2020-10-28 18:29:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:31,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:31,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:31,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:31,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:31,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:31,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:31,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:32,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:36,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:36,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:36,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 18:29:36,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:29:36,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:29:36,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:36,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:36,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:29:36,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:29:36,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 18:29:36,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:36,951 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:29:36,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:36,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:36,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:36,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:36,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:36,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:29:36,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:36,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:36,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:36,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:36,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:36,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:36,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974012210] [2020-10-28 18:29:36,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:36,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:29:36,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797163284] [2020-10-28 18:29:36,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:29:36,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:36,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:29:36,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:29:36,985 INFO L87 Difference]: Start difference. First operand 1862 states and 2632 transitions. Second operand 5 states. [2020-10-28 18:29:37,599 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 18:29:38,877 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-28 18:29:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:39,357 INFO L93 Difference]: Finished difference Result 5076 states and 7188 transitions. [2020-10-28 18:29:39,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:29:39,364 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-10-28 18:29:39,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:39,380 INFO L225 Difference]: With dead ends: 5076 [2020-10-28 18:29:39,380 INFO L226 Difference]: Without dead ends: 3349 [2020-10-28 18:29:39,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:29:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3349 states. [2020-10-28 18:29:40,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3349 to 3298. [2020-10-28 18:29:40,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3298 states. [2020-10-28 18:29:40,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3298 states to 3298 states and 4556 transitions. [2020-10-28 18:29:40,046 INFO L78 Accepts]: Start accepts. Automaton has 3298 states and 4556 transitions. Word has length 80 [2020-10-28 18:29:40,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:40,046 INFO L481 AbstractCegarLoop]: Abstraction has 3298 states and 4556 transitions. [2020-10-28 18:29:40,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:29:40,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3298 states and 4556 transitions. [2020-10-28 18:29:40,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 18:29:40,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:40,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:40,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 18:29:40,049 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:40,050 INFO L82 PathProgramCache]: Analyzing trace with hash -515921482, now seen corresponding path program 1 times [2020-10-28 18:29:40,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:40,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000683619] [2020-10-28 18:29:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:40,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:40,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:40,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:40,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:40,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:40,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:42,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:42,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:43,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:43,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:43,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:45,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:45,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 18:29:45,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:29:45,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:29:45,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:45,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:45,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:45,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 18:29:45,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:29:45,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:45,621 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:29:45,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:45,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:45,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:45,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:45,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:45,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:29:45,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:45,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:45,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:45,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:45,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:45,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:45,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000683619] [2020-10-28 18:29:45,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:45,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:29:45,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230203784] [2020-10-28 18:29:45,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:29:45,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:45,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:29:45,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:29:45,649 INFO L87 Difference]: Start difference. First operand 3298 states and 4556 transitions. Second operand 4 states. [2020-10-28 18:29:46,205 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:29:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:47,879 INFO L93 Difference]: Finished difference Result 8928 states and 12320 transitions. [2020-10-28 18:29:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:29:47,880 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 18:29:47,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:47,914 INFO L225 Difference]: With dead ends: 8928 [2020-10-28 18:29:47,914 INFO L226 Difference]: Without dead ends: 5765 [2020-10-28 18:29:47,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:29:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5765 states. [2020-10-28 18:29:48,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5765 to 5426. [2020-10-28 18:29:48,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5426 states. [2020-10-28 18:29:48,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5426 states to 5426 states and 7428 transitions. [2020-10-28 18:29:48,924 INFO L78 Accepts]: Start accepts. Automaton has 5426 states and 7428 transitions. Word has length 80 [2020-10-28 18:29:48,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:48,925 INFO L481 AbstractCegarLoop]: Abstraction has 5426 states and 7428 transitions. [2020-10-28 18:29:48,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:29:48,925 INFO L276 IsEmpty]: Start isEmpty. Operand 5426 states and 7428 transitions. [2020-10-28 18:29:48,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:29:48,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:48,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:48,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 18:29:48,928 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:48,928 INFO L82 PathProgramCache]: Analyzing trace with hash 2005089097, now seen corresponding path program 1 times [2020-10-28 18:29:48,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:48,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772160587] [2020-10-28 18:29:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:48,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:49,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:49,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:49,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:49,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:49,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:49,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:50,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:50,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:50,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:50,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:50,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:51,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:51,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:52,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:53,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:53,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:29:53,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:29:53,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:29:53,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:53,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:53,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:29:53,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 18:29:53,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 18:29:53,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:54,479 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:29:54,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:54,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:54,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:54,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:54,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:54,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:29:54,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:54,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:54,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:54,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772160587] [2020-10-28 18:29:54,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:54,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:29:54,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792995570] [2020-10-28 18:29:54,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:29:54,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:54,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:29:54,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:29:54,508 INFO L87 Difference]: Start difference. First operand 5426 states and 7428 transitions. Second operand 5 states. [2020-10-28 18:29:55,051 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:29:57,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:57,258 INFO L93 Difference]: Finished difference Result 10672 states and 14712 transitions. [2020-10-28 18:29:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:29:57,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-10-28 18:29:57,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:57,277 INFO L225 Difference]: With dead ends: 10672 [2020-10-28 18:29:57,278 INFO L226 Difference]: Without dead ends: 8001 [2020-10-28 18:29:57,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:29:57,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2020-10-28 18:29:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 5338. [2020-10-28 18:29:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5338 states. [2020-10-28 18:29:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 7336 transitions. [2020-10-28 18:29:58,345 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 7336 transitions. Word has length 82 [2020-10-28 18:29:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:58,345 INFO L481 AbstractCegarLoop]: Abstraction has 5338 states and 7336 transitions. [2020-10-28 18:29:58,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:29:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 7336 transitions. [2020-10-28 18:29:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:29:58,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:58,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:58,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 18:29:58,347 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:58,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:58,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1340272836, now seen corresponding path program 1 times [2020-10-28 18:29:58,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:58,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313714484] [2020-10-28 18:29:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:58,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:58,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:58,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:58,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:58,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:58,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:59,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:59,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:59,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:59,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:59,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:59,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:59,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:59,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:00,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:01,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:01,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:03,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:03,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:30:03,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:30:03,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:30:03,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:03,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:03,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:03,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 18:30:03,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:30:03,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:03,915 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:30:03,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:03,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:03,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:03,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:03,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:03,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:30:03,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:03,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:03,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:03,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:03,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:03,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:03,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313714484] [2020-10-28 18:30:03,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:03,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:30:03,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392981205] [2020-10-28 18:30:03,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:30:03,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:03,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:30:03,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:30:03,945 INFO L87 Difference]: Start difference. First operand 5338 states and 7336 transitions. Second operand 4 states. [2020-10-28 18:30:04,513 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:30:06,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:06,699 INFO L93 Difference]: Finished difference Result 10610 states and 14764 transitions. [2020-10-28 18:30:06,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:30:06,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 18:30:06,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:06,715 INFO L225 Difference]: With dead ends: 10610 [2020-10-28 18:30:06,715 INFO L226 Difference]: Without dead ends: 7695 [2020-10-28 18:30:06,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:30:06,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7695 states. [2020-10-28 18:30:08,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7695 to 7342. [2020-10-28 18:30:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7342 states. [2020-10-28 18:30:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7342 states to 7342 states and 10080 transitions. [2020-10-28 18:30:08,218 INFO L78 Accepts]: Start accepts. Automaton has 7342 states and 10080 transitions. Word has length 82 [2020-10-28 18:30:08,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:08,219 INFO L481 AbstractCegarLoop]: Abstraction has 7342 states and 10080 transitions. [2020-10-28 18:30:08,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:30:08,219 INFO L276 IsEmpty]: Start isEmpty. Operand 7342 states and 10080 transitions. [2020-10-28 18:30:08,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:30:08,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:08,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:08,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 18:30:08,220 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:08,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:08,220 INFO L82 PathProgramCache]: Analyzing trace with hash -857211497, now seen corresponding path program 1 times [2020-10-28 18:30:08,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:08,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085173681] [2020-10-28 18:30:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:08,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:08,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:08,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:08,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:08,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:11,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:11,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:30:11,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:30:11,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2929 [2020-10-28 18:30:11,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:11,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:11,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:30:11,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:30:11,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:30:11,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:11,741 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:30:11,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:11,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:11,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:11,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:11,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:11,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:30:11,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:11,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:11,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:11,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085173681] [2020-10-28 18:30:11,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:11,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:30:11,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446761882] [2020-10-28 18:30:11,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:30:11,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:11,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:30:11,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:30:11,770 INFO L87 Difference]: Start difference. First operand 7342 states and 10080 transitions. Second operand 8 states. [2020-10-28 18:30:12,370 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-28 18:30:13,828 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:30:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:16,312 INFO L93 Difference]: Finished difference Result 18266 states and 25068 transitions. [2020-10-28 18:30:16,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:30:16,313 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2020-10-28 18:30:16,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:16,335 INFO L225 Difference]: With dead ends: 18266 [2020-10-28 18:30:16,335 INFO L226 Difference]: Without dead ends: 11011 [2020-10-28 18:30:16,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:30:16,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11011 states. [2020-10-28 18:30:17,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11011 to 7342. [2020-10-28 18:30:17,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7342 states. [2020-10-28 18:30:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7342 states to 7342 states and 10078 transitions. [2020-10-28 18:30:17,963 INFO L78 Accepts]: Start accepts. Automaton has 7342 states and 10078 transitions. Word has length 82 [2020-10-28 18:30:17,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:17,963 INFO L481 AbstractCegarLoop]: Abstraction has 7342 states and 10078 transitions. [2020-10-28 18:30:17,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:30:17,964 INFO L276 IsEmpty]: Start isEmpty. Operand 7342 states and 10078 transitions. [2020-10-28 18:30:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 18:30:17,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:17,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:17,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 18:30:17,964 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:17,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:17,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1857553654, now seen corresponding path program 1 times [2020-10-28 18:30:17,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:17,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552859398] [2020-10-28 18:30:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:18,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:18,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:18,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:20,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:20,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 18:30:20,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:30:20,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2867 [2020-10-28 18:30:20,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:20,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:20,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:30:20,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-28 18:30:20,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 18:30:20,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:21,397 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:30:21,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:21,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:21,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:21,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:21,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:21,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:30:21,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:21,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:21,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:21,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:21,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:21,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:21,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552859398] [2020-10-28 18:30:21,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:21,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:30:21,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646026579] [2020-10-28 18:30:21,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:30:21,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:21,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:30:21,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:30:21,422 INFO L87 Difference]: Start difference. First operand 7342 states and 10078 transitions. Second operand 6 states. [2020-10-28 18:30:24,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:24,769 INFO L93 Difference]: Finished difference Result 12501 states and 16972 transitions. [2020-10-28 18:30:24,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:30:24,770 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-28 18:30:24,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:24,795 INFO L225 Difference]: With dead ends: 12501 [2020-10-28 18:30:24,795 INFO L226 Difference]: Without dead ends: 12498 [2020-10-28 18:30:24,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:30:24,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12498 states. [2020-10-28 18:30:26,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12498 to 7726. [2020-10-28 18:30:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7726 states. [2020-10-28 18:30:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7726 states to 7726 states and 10430 transitions. [2020-10-28 18:30:26,833 INFO L78 Accepts]: Start accepts. Automaton has 7726 states and 10430 transitions. Word has length 84 [2020-10-28 18:30:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:26,834 INFO L481 AbstractCegarLoop]: Abstraction has 7726 states and 10430 transitions. [2020-10-28 18:30:26,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:30:26,834 INFO L276 IsEmpty]: Start isEmpty. Operand 7726 states and 10430 transitions. [2020-10-28 18:30:26,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 18:30:26,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:26,837 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:26,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 18:30:26,838 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:26,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:26,838 INFO L82 PathProgramCache]: Analyzing trace with hash -45316980, now seen corresponding path program 1 times [2020-10-28 18:30:26,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:26,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42555504] [2020-10-28 18:30:26,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:26,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:26,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:26,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:27,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:27,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:28,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:28,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:28,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:28,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:28,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:29,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:29,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking...