/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:56:15,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:56:15,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:56:15,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:56:15,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:56:15,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:56:15,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:56:15,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:56:15,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:56:15,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:56:15,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:56:15,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:56:15,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:56:15,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:56:15,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:56:15,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:56:15,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:56:15,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:56:15,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:56:15,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:56:15,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:56:15,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:56:15,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:56:15,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:56:15,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:56:15,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:56:15,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:56:15,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:56:15,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:56:15,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:56:15,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:56:15,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:56:15,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:56:15,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:56:15,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:56:15,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:56:15,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:56:15,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:56:15,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:56:15,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:56:15,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:56:15,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 20:56:15,887 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:56:15,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:56:15,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:56:15,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:56:15,893 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:56:15,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:56:15,894 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:56:15,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:56:15,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:56:15,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:56:15,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:56:15,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:56:15,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:56:15,896 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:56:15,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:56:15,896 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:56:15,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:56:15,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:56:15,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:56:15,897 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:56:15,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:56:15,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:56:15,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:56:15,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:56:15,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:56:15,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:56:15,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:56:15,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:56:15,899 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:56:15,899 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:56:16,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:56:16,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:56:16,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:56:16,313 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:56:16,314 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:56:16,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label09.c [2020-10-26 20:56:16,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bced2df2/d2bae3cf3c78471f890199f205bea3e9/FLAG73e7d0c31 [2020-10-26 20:56:17,325 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:56:17,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label09.c [2020-10-26 20:56:17,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bced2df2/d2bae3cf3c78471f890199f205bea3e9/FLAG73e7d0c31 [2020-10-26 20:56:17,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bced2df2/d2bae3cf3c78471f890199f205bea3e9 [2020-10-26 20:56:17,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:56:17,829 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:56:17,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:56:17,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:56:17,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:56:17,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:56:17" (1/1) ... [2020-10-26 20:56:17,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a4f94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:56:17, skipping insertion in model container [2020-10-26 20:56:17,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:56:17" (1/1) ... [2020-10-26 20:56:17,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:56:18,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:56:19,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:56:19,634 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:56:20,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:56:20,406 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:56:20,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:56:20 WrapperNode [2020-10-26 20:56:20,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:56:20,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:56:20,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:56:20,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:56:20,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:56:20" (1/1) ... [2020-10-26 20:56:20,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:56:20" (1/1) ... [2020-10-26 20:56:20,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:56:20" (1/1) ... [2020-10-26 20:56:20,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:56:20" (1/1) ... [2020-10-26 20:56:20,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:56:20" (1/1) ... [2020-10-26 20:56:20,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:56:20" (1/1) ... [2020-10-26 20:56:20,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:56:20" (1/1) ... [2020-10-26 20:56:20,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:56:20,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:56:20,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:56:20,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:56:20,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:56:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:56:20,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:56:20,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:56:20,869 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:56:20,869 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:56:20,869 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 20:56:20,869 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 20:56:20,869 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 20:56:20,869 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:56:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:56:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 20:56:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 20:56:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 20:56:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:56:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:56:20,870 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:56:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:56:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:56:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:56:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:56:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:56:20,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:56:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:56:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:56:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:56:20,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:56:26,530 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:56:26,530 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:56:26,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:56:26 BoogieIcfgContainer [2020-10-26 20:56:26,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:56:26,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:56:26,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:56:26,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:56:26,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:56:17" (1/3) ... [2020-10-26 20:56:26,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728a1e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:56:26, skipping insertion in model container [2020-10-26 20:56:26,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:56:20" (2/3) ... [2020-10-26 20:56:26,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728a1e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:56:26, skipping insertion in model container [2020-10-26 20:56:26,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:56:26" (3/3) ... [2020-10-26 20:56:26,544 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label09.c [2020-10-26 20:56:26,557 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:56:26,563 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:56:26,577 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:56:26,612 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:56:26,613 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:56:26,613 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:56:26,613 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:56:26,613 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:56:26,613 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:56:26,614 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:56:26,614 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:56:26,651 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-26 20:56:26,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2020-10-26 20:56:26,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:26,705 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:56:26,706 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:26,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:26,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1022754952, now seen corresponding path program 1 times [2020-10-26 20:56:26,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:26,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978108253] [2020-10-26 20:56:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:27,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:32,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:32,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 799 [2020-10-26 20:56:32,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:32,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5123 [2020-10-26 20:56:32,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:32,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 20:56:32,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:32,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 790 [2020-10-26 20:56:32,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:56:33,524 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 20:56:33,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:33,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:33,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:33,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:33,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:33,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:56:33,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:33,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:33,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:33,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:33,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:56:34,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978108253] [2020-10-26 20:56:34,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:56:34,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 20:56:34,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523877439] [2020-10-26 20:56:34,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:56:34,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:34,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:56:34,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:56:34,563 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 4 states. [2020-10-26 20:56:34,835 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 20:56:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:45,814 INFO L93 Difference]: Finished difference Result 2677 states and 5143 transitions. [2020-10-26 20:56:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:56:45,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 783 [2020-10-26 20:56:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:45,873 INFO L225 Difference]: With dead ends: 2677 [2020-10-26 20:56:45,874 INFO L226 Difference]: Without dead ends: 1703 [2020-10-26 20:56:45,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:56:45,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-26 20:56:46,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1690. [2020-10-26 20:56:46,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-10-26 20:56:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2730 transitions. [2020-10-26 20:56:46,061 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2730 transitions. Word has length 783 [2020-10-26 20:56:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:46,063 INFO L481 AbstractCegarLoop]: Abstraction has 1690 states and 2730 transitions. [2020-10-26 20:56:46,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:56:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2730 transitions. [2020-10-26 20:56:46,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 792 [2020-10-26 20:56:46,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:46,094 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:56:46,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:56:46,095 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:46,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2042725478, now seen corresponding path program 1 times [2020-10-26 20:56:46,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:46,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322798201] [2020-10-26 20:56:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:46,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:47,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:51,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:51,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:51,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 809 [2020-10-26 20:56:51,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:56:51,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5183 [2020-10-26 20:56:51,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:51,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:56:51,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:51,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 20:56:51,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 20:56:51,854 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 20:56:51,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:51,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:51,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:51,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:51,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:51,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:56:51,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:51,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:51,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:51,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:51,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 20:56:51,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:51,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:51,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:51,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 20:56:51,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:51,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:56:51,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:51,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:51,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:51,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 20:56:51,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:56:52,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322798201] [2020-10-26 20:56:52,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:56:52,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:56:52,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103551707] [2020-10-26 20:56:52,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:56:52,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:52,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:56:52,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:56:52,475 INFO L87 Difference]: Start difference. First operand 1690 states and 2730 transitions. Second operand 7 states. [2020-10-26 20:56:52,626 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-26 20:56:55,024 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-26 20:57:06,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:06,706 INFO L93 Difference]: Finished difference Result 5192 states and 8432 transitions. [2020-10-26 20:57:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:57:06,707 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 791 [2020-10-26 20:57:06,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:06,731 INFO L225 Difference]: With dead ends: 5192 [2020-10-26 20:57:06,731 INFO L226 Difference]: Without dead ends: 3508 [2020-10-26 20:57:06,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:57:06,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2020-10-26 20:57:06,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 3439. [2020-10-26 20:57:06,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3439 states. [2020-10-26 20:57:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 5024 transitions. [2020-10-26 20:57:06,908 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 5024 transitions. Word has length 791 [2020-10-26 20:57:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:06,909 INFO L481 AbstractCegarLoop]: Abstraction has 3439 states and 5024 transitions. [2020-10-26 20:57:06,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:57:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 5024 transitions. [2020-10-26 20:57:06,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2020-10-26 20:57:06,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:06,948 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:57:06,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:57:06,949 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:06,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:06,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1067985675, now seen corresponding path program 1 times [2020-10-26 20:57:06,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:06,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637581808] [2020-10-26 20:57:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:07,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:08,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:11,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:12,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:12,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 814 [2020-10-26 20:57:12,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:57:12,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 20:57:12,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:12,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:57:12,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:12,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 20:57:12,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:12,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:12,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:12,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:12,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:12,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:12,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:57:12,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:12,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:12,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:12,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:12,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:12,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:12,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:12,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:12,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 20:57:12,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:12,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:57:12,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:12,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:12,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:12,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 20:57:12,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:57:12,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637581808] [2020-10-26 20:57:12,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:57:12,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:57:12,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820091267] [2020-10-26 20:57:12,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:57:12,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:12,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:57:12,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:57:12,687 INFO L87 Difference]: Start difference. First operand 3439 states and 5024 transitions. Second operand 7 states. [2020-10-26 20:57:12,829 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 20:57:15,460 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 20:57:25,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:25,998 INFO L93 Difference]: Finished difference Result 10504 states and 15670 transitions. [2020-10-26 20:57:25,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:57:25,999 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 796 [2020-10-26 20:57:25,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:26,038 INFO L225 Difference]: With dead ends: 10504 [2020-10-26 20:57:26,038 INFO L226 Difference]: Without dead ends: 7071 [2020-10-26 20:57:26,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:57:26,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7071 states. [2020-10-26 20:57:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7071 to 6999. [2020-10-26 20:57:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6999 states. [2020-10-26 20:57:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6999 states to 6999 states and 9417 transitions. [2020-10-26 20:57:26,258 INFO L78 Accepts]: Start accepts. Automaton has 6999 states and 9417 transitions. Word has length 796 [2020-10-26 20:57:26,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:26,259 INFO L481 AbstractCegarLoop]: Abstraction has 6999 states and 9417 transitions. [2020-10-26 20:57:26,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:57:26,259 INFO L276 IsEmpty]: Start isEmpty. Operand 6999 states and 9417 transitions. [2020-10-26 20:57:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 801 [2020-10-26 20:57:26,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:26,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:57:26,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:57:26,285 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:26,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:26,286 INFO L82 PathProgramCache]: Analyzing trace with hash 123947219, now seen corresponding path program 1 times [2020-10-26 20:57:26,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:26,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570110698] [2020-10-26 20:57:26,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:26,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:27,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:28,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:31,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:31,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 818 [2020-10-26 20:57:31,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:57:31,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-26 20:57:31,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:31,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:57:31,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:31,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 20:57:31,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:31,700 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 20:57:31,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:31,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:31,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:31,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:31,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:31,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:57:31,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:31,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:31,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:31,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:31,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:31,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:31,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:31,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:31,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:57:31,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:31,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:57:31,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:31,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:31,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:31,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:57:31,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:57:32,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570110698] [2020-10-26 20:57:32,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:57:32,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:57:32,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729849227] [2020-10-26 20:57:32,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:57:32,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:32,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:57:32,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:57:32,182 INFO L87 Difference]: Start difference. First operand 6999 states and 9417 transitions. Second operand 7 states. [2020-10-26 20:57:32,319 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-26 20:57:39,586 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-26 20:57:45,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:45,417 INFO L93 Difference]: Finished difference Result 17838 states and 24522 transitions. [2020-10-26 20:57:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:57:45,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 800 [2020-10-26 20:57:45,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:45,476 INFO L225 Difference]: With dead ends: 17838 [2020-10-26 20:57:45,476 INFO L226 Difference]: Without dead ends: 10845 [2020-10-26 20:57:45,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:57:45,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10845 states. [2020-10-26 20:57:45,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10845 to 10569. [2020-10-26 20:57:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-10-26 20:57:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 13658 transitions. [2020-10-26 20:57:45,794 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 13658 transitions. Word has length 800 [2020-10-26 20:57:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:45,794 INFO L481 AbstractCegarLoop]: Abstraction has 10569 states and 13658 transitions. [2020-10-26 20:57:45,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:57:45,794 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 13658 transitions. [2020-10-26 20:57:45,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 818 [2020-10-26 20:57:45,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:45,828 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:57:45,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:57:45,828 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:45,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:45,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1756252424, now seen corresponding path program 1 times [2020-10-26 20:57:45,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:45,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198693373] [2020-10-26 20:57:45,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:46,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:46,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:46,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:51,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:51,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 837 [2020-10-26 20:57:51,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:57:51,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-26 20:57:51,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:51,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:57:51,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:51,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 20:57:51,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:51,413 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 20:57:51,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:51,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:51,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:51,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:51,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:51,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:57:51,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:51,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:51,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:51,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:51,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:51,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:51,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:51,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:51,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:51,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 20:57:51,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:57:51,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-26 20:57:51,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:51,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:51,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:51,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 20:57:51,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 20:57:51,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 20:57:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:51,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:51,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:51,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 20:57:51,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:51,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:57:51,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:51,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:51,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:51,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 20:57:51,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:57:52,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198693373] [2020-10-26 20:57:52,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:52,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:57:52,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120885653] [2020-10-26 20:57:52,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:57:52,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:52,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:57:52,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:57:52,187 INFO L87 Difference]: Start difference. First operand 10569 states and 13658 transitions. Second operand 8 states. [2020-10-26 20:57:52,344 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-26 20:57:55,407 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-26 20:58:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:58:14,319 INFO L93 Difference]: Finished difference Result 30093 states and 41034 transitions. [2020-10-26 20:58:14,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 20:58:14,320 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 817 [2020-10-26 20:58:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:58:14,395 INFO L225 Difference]: With dead ends: 30093 [2020-10-26 20:58:14,395 INFO L226 Difference]: Without dead ends: 19530 [2020-10-26 20:58:14,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:58:14,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19530 states. [2020-10-26 20:58:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19530 to 19403. [2020-10-26 20:58:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19403 states. [2020-10-26 20:58:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19403 states to 19403 states and 25276 transitions. [2020-10-26 20:58:14,922 INFO L78 Accepts]: Start accepts. Automaton has 19403 states and 25276 transitions. Word has length 817 [2020-10-26 20:58:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:58:14,922 INFO L481 AbstractCegarLoop]: Abstraction has 19403 states and 25276 transitions. [2020-10-26 20:58:14,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:58:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 19403 states and 25276 transitions. [2020-10-26 20:58:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-10-26 20:58:14,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:58:14,984 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:58:14,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:58:14,984 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:58:14,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:58:14,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1366142588, now seen corresponding path program 1 times [2020-10-26 20:58:14,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:58:14,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233796809] [2020-10-26 20:58:14,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:58:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:15,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:17,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:19,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:19,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 839 [2020-10-26 20:58:19,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:58:19,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4737 [2020-10-26 20:58:19,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:19,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:58:19,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-26 20:58:19,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 787 [2020-10-26 20:58:19,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:20,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:58:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:20,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:20,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:20,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:58:20,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:20,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:58:20,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:20,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:58:20,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:20,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:58:20,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:20,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:58:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:20,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:20,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:20,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:58:20,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:20,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:58:20,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:20,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:58:20,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:20,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:58:20,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:20,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 20:58:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:20,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:20,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:20,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:58:20,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:20,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:58:20,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:20,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:58:20,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:20,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:58:20,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:58:21,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233796809] [2020-10-26 20:58:21,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:58:21,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:58:21,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197913561] [2020-10-26 20:58:21,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:58:21,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:58:21,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:58:21,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:58:21,294 INFO L87 Difference]: Start difference. First operand 19403 states and 25276 transitions. Second operand 5 states. [2020-10-26 20:58:21,596 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 20:58:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:58:32,888 INFO L93 Difference]: Finished difference Result 45584 states and 61087 transitions. [2020-10-26 20:58:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:58:32,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 819 [2020-10-26 20:58:32,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:58:32,993 INFO L225 Difference]: With dead ends: 45584 [2020-10-26 20:58:32,993 INFO L226 Difference]: Without dead ends: 26211 [2020-10-26 20:58:33,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:58:33,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26211 states. [2020-10-26 20:58:33,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26211 to 26172. [2020-10-26 20:58:33,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26172 states. [2020-10-26 20:58:33,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26172 states to 26172 states and 33854 transitions. [2020-10-26 20:58:33,790 INFO L78 Accepts]: Start accepts. Automaton has 26172 states and 33854 transitions. Word has length 819 [2020-10-26 20:58:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:58:33,792 INFO L481 AbstractCegarLoop]: Abstraction has 26172 states and 33854 transitions. [2020-10-26 20:58:33,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:58:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 26172 states and 33854 transitions. [2020-10-26 20:58:33,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 980 [2020-10-26 20:58:33,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:58:33,870 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:58:33,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:58:33,871 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:58:33,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:58:33,872 INFO L82 PathProgramCache]: Analyzing trace with hash 489402464, now seen corresponding path program 1 times [2020-10-26 20:58:33,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:58:33,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796051558] [2020-10-26 20:58:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:58:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:34,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:34,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:34,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:35,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:39,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:39,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1003 [2020-10-26 20:58:39,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:58:39,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-26 20:58:39,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:39,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:58:39,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:58:39,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-10-26 20:58:39,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:39,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:58:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:39,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:39,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:39,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:58:39,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:39,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:58:39,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:39,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:58:39,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:39,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:58:39,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:40,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:58:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:40,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:40,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:40,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:40,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:58:40,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:58:40,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:58:40,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:40,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:58:40,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:58:40,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:58:40,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:40,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 20:58:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:40,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:40,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:40,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:40,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:58:40,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:58:40,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:58:40,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:40,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:58:40,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:58:40,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:58:40,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:40,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 20:58:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:40,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:40,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:40,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-26 20:58:40,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:40,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-26 20:58:40,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:40,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:58:40,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:58:40,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-26 20:58:40,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:40,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-10-26 20:58:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:40,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:40,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:40,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-26 20:58:40,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:40,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:58:40,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:40,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:58:40,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-26 20:58:40,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:58:40,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 206 proven. 67 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-26 20:58:41,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796051558] [2020-10-26 20:58:41,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:58:41,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:58:41,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542819675] [2020-10-26 20:58:41,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:58:41,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:58:41,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:58:41,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:58:41,399 INFO L87 Difference]: Start difference. First operand 26172 states and 33854 transitions. Second operand 9 states. [2020-10-26 20:58:41,538 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 20:58:45,834 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-26 20:58:55,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:58:55,882 INFO L93 Difference]: Finished difference Result 70397 states and 93791 transitions. [2020-10-26 20:58:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:58:55,883 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 979 [2020-10-26 20:58:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:58:56,018 INFO L225 Difference]: With dead ends: 70397 [2020-10-26 20:58:56,018 INFO L226 Difference]: Without dead ends: 44235 [2020-10-26 20:58:56,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:58:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44235 states. [2020-10-26 20:58:57,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44235 to 43187. [2020-10-26 20:58:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43187 states. [2020-10-26 20:58:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43187 states to 43187 states and 52763 transitions. [2020-10-26 20:58:57,136 INFO L78 Accepts]: Start accepts. Automaton has 43187 states and 52763 transitions. Word has length 979 [2020-10-26 20:58:57,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:58:57,137 INFO L481 AbstractCegarLoop]: Abstraction has 43187 states and 52763 transitions. [2020-10-26 20:58:57,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:58:57,137 INFO L276 IsEmpty]: Start isEmpty. Operand 43187 states and 52763 transitions. [2020-10-26 20:58:57,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2020-10-26 20:58:57,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:58:57,207 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:58:57,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:58:57,208 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:58:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:58:57,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1176549727, now seen corresponding path program 1 times [2020-10-26 20:58:57,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:58:57,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453329682] [2020-10-26 20:58:57,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:58:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:57,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:57,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:57,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:02,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:02,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1004 [2020-10-26 20:59:02,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:59:02,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 20:59:02,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:02,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:59:02,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-26 20:59:02,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-26 20:59:02,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:02,588 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 20:59:02,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:59:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:02,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:02,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:02,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:59:02,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:02,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:59:02,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:02,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:59:02,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:59:02,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:59:02,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:02,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:59:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:02,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:02,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:02,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:59:02,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:02,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:59:02,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:02,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:59:02,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:59:02,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:59:02,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:02,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 20:59:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:02,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:02,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:02,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:59:02,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:02,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:59:02,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:02,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:59:02,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:59:02,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:59:02,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:02,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 20:59:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:02,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:02,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:02,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 20:59:02,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:02,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-26 20:59:02,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:02,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:59:02,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:59:02,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:59:02,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:02,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-26 20:59:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:02,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:02,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:02,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 20:59:02,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:02,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:59:02,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:02,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:59:02,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-26 20:59:02,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:59:02,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-26 20:59:03,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453329682] [2020-10-26 20:59:03,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:59:03,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:59:03,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468288228] [2020-10-26 20:59:03,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:59:03,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:59:03,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:59:03,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:59:03,325 INFO L87 Difference]: Start difference. First operand 43187 states and 52763 transitions. Second operand 7 states. [2020-10-26 20:59:03,737 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 20:59:14,941 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 20:59:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:59:20,560 INFO L93 Difference]: Finished difference Result 97500 states and 122103 transitions. [2020-10-26 20:59:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:59:20,561 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 980 [2020-10-26 20:59:20,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:59:20,714 INFO L225 Difference]: With dead ends: 97500 [2020-10-26 20:59:20,715 INFO L226 Difference]: Without dead ends: 52645 [2020-10-26 20:59:20,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:59:20,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52645 states. [2020-10-26 20:59:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52645 to 50008. [2020-10-26 20:59:21,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50008 states. [2020-10-26 20:59:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50008 states to 50008 states and 59668 transitions. [2020-10-26 20:59:22,051 INFO L78 Accepts]: Start accepts. Automaton has 50008 states and 59668 transitions. Word has length 980 [2020-10-26 20:59:22,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:59:22,051 INFO L481 AbstractCegarLoop]: Abstraction has 50008 states and 59668 transitions. [2020-10-26 20:59:22,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:59:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 50008 states and 59668 transitions. [2020-10-26 20:59:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1170 [2020-10-26 20:59:22,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:59:22,112 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:59:22,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:59:22,112 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:59:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:59:22,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1949203402, now seen corresponding path program 1 times [2020-10-26 20:59:22,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:59:22,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358915465] [2020-10-26 20:59:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:59:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:22,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:22,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:26,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:27,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:27,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1195 [2020-10-26 20:59:27,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:59:27,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 20:59:27,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:27,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:59:27,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 298 [2020-10-26 20:59:27,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 20:59:27,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:27,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:59:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:27,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:27,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:27,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:59:27,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:27,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:59:27,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:27,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:59:27,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:59:27,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:59:27,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:27,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:59:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:27,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:27,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:27,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:59:27,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:27,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:59:27,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:27,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:59:27,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:59:27,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:59:27,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:27,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 20:59:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:27,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:27,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:27,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-26 20:59:27,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:27,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-26 20:59:27,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:27,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:59:27,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:59:27,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 262 [2020-10-26 20:59:27,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:28,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-10-26 20:59:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:28,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:28,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:28,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 20:59:28,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:28,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:59:28,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:28,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:59:28,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:59:28,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:59:28,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:28,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 295 [2020-10-26 20:59:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:28,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:28,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:28,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 20:59:28,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:28,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 20:59:28,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:28,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:59:28,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:59:28,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 20:59:28,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:28,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-10-26 20:59:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:28,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:28,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:59:28,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 20:59:28,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:59:28,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 20:59:28,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:59:28,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:59:28,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-26 20:59:28,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:59:28,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:59:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 428 proven. 30 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 20:59:29,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358915465] [2020-10-26 20:59:29,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:59:29,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:59:29,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144102647] [2020-10-26 20:59:29,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:59:29,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:59:29,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:59:29,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:59:29,212 INFO L87 Difference]: Start difference. First operand 50008 states and 59668 transitions. Second operand 7 states. [2020-10-26 20:59:29,352 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 20:59:43,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:59:43,157 INFO L93 Difference]: Finished difference Result 110135 states and 131714 transitions. [2020-10-26 20:59:43,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:59:43,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1169 [2020-10-26 20:59:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:59:43,330 INFO L225 Difference]: With dead ends: 110135 [2020-10-26 20:59:43,330 INFO L226 Difference]: Without dead ends: 60967 [2020-10-26 20:59:43,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:59:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60967 states. [2020-10-26 20:59:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60967 to 59255. [2020-10-26 20:59:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59255 states. [2020-10-26 20:59:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59255 states to 59255 states and 69534 transitions. [2020-10-26 20:59:44,871 INFO L78 Accepts]: Start accepts. Automaton has 59255 states and 69534 transitions. Word has length 1169 [2020-10-26 20:59:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:59:44,872 INFO L481 AbstractCegarLoop]: Abstraction has 59255 states and 69534 transitions. [2020-10-26 20:59:44,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:59:44,872 INFO L276 IsEmpty]: Start isEmpty. Operand 59255 states and 69534 transitions. [2020-10-26 20:59:45,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1191 [2020-10-26 20:59:45,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:59:45,236 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:59:45,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:59:45,236 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:59:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:59:45,239 INFO L82 PathProgramCache]: Analyzing trace with hash 73566367, now seen corresponding path program 1 times [2020-10-26 20:59:45,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:59:45,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628528945] [2020-10-26 20:59:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:59:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:59:45,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:45,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:59:45,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking...