/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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 -i ../../../trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:31:43,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:31:43,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:31:43,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:31:43,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:31:43,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:31:43,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:31:43,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:31:43,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:31:43,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:31:43,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:31:43,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:31:43,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:31:43,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:31:43,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:31:43,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:31:43,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:31:43,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:31:43,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:31:43,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:31:43,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:31:43,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:31:43,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:31:43,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:31:43,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:31:43,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:31:43,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:31:43,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:31:43,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:31:43,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:31:43,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:31:43,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:31:43,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:31:43,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:31:43,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:31:43,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:31:43,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:31:43,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:31:43,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:31:43,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:31:43,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:31:43,754 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 [2020-10-14 17:31:43,798 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:31:43,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:31:43,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:31:43,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:31:43,802 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:31:43,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:31:43,803 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:31:43,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:31:43,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:31:43,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:31:43,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:31:43,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:31:43,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:31:43,807 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:31:43,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:31:43,808 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:31:43,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:31:43,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:31:43,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:31:43,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:31:43,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:31:43,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:31:43,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:31:43,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:31:43,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:31:43,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:31:43,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:31:43,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:31:43,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:31:43,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:31:44,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:31:44,128 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:31:44,134 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:31:44,135 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:31:44,136 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:31:44,137 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c [2020-10-14 17:31:44,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/565124cf6/2638cec7e3a641fcb39e29759ba5aa07/FLAG07b05a5c4 [2020-10-14 17:31:44,702 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:31:44,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c [2020-10-14 17:31:44,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/565124cf6/2638cec7e3a641fcb39e29759ba5aa07/FLAG07b05a5c4 [2020-10-14 17:31:45,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/565124cf6/2638cec7e3a641fcb39e29759ba5aa07 [2020-10-14 17:31:45,087 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:31:45,089 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:31:45,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:31:45,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:31:45,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:31:45,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:31:45" (1/1) ... [2020-10-14 17:31:45,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12755b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:31:45, skipping insertion in model container [2020-10-14 17:31:45,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:31:45" (1/1) ... [2020-10-14 17:31:45,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:31:45,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:31:45,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:31:45,336 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:31:45,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:31:45,374 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:31:45,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:31:45 WrapperNode [2020-10-14 17:31:45,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:31:45,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:31:45,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:31:45,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:31:45,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:31:45" (1/1) ... [2020-10-14 17:31:45,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:31:45" (1/1) ... [2020-10-14 17:31:45,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:31:45" (1/1) ... [2020-10-14 17:31:45,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:31:45" (1/1) ... [2020-10-14 17:31:45,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:31:45" (1/1) ... [2020-10-14 17:31:45,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:31:45" (1/1) ... [2020-10-14 17:31:45,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:31:45" (1/1) ... [2020-10-14 17:31:45,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:31:45,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:31:45,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:31:45,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:31:45,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:31:45" (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 [2020-10-14 17:31:45,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:31:45,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:31:45,568 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 17:31:45,568 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:31:45,568 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:31:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:31:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 17:31:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 17:31:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:31:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:31:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:31:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:31:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:31:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:31:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:31:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:31:45,815 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:31:45,815 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 17:31:45,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:31:45 BoogieIcfgContainer [2020-10-14 17:31:45,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:31:45,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:31:45,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:31:45,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:31:45,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:31:45" (1/3) ... [2020-10-14 17:31:45,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebde29f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:31:45, skipping insertion in model container [2020-10-14 17:31:45,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:31:45" (2/3) ... [2020-10-14 17:31:45,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebde29f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:31:45, skipping insertion in model container [2020-10-14 17:31:45,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:31:45" (3/3) ... [2020-10-14 17:31:45,828 INFO L109 eAbstractionObserver]: Analyzing ICFG array_init_both_ends_multiple_sum.c [2020-10-14 17:31:45,838 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:31:45,846 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:31:45,860 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:31:45,880 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:31:45,880 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:31:45,881 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:31:45,881 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:31:45,881 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:31:45,881 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:31:45,881 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:31:45,881 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:31:45,898 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-14 17:31:45,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 17:31:45,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:31:45,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:31:45,905 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:31:45,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:31:45,911 INFO L82 PathProgramCache]: Analyzing trace with hash -428257903, now seen corresponding path program 1 times [2020-10-14 17:31:45,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:31:45,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11837168] [2020-10-14 17:31:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:31:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:31:46,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:46,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:46,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:46,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:46,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:31:46,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 17:31:46,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:31:46,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-14 17:31:46,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:31:46,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:31:46,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:31:46,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:31:46,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 17:31:46,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 17:31:46,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:31:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:31:46,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:46,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:31:46,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:31:46,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:31:46,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 17:31:46,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:31:46,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:31:46,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:31:46,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:31:46,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:31:46,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:31:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:31:46,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11837168] [2020-10-14 17:31:46,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:31:46,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:31:46,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530852956] [2020-10-14 17:31:46,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:31:46,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:31:46,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:31:46,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:31:46,869 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-10-14 17:31:47,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:31:47,048 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-10-14 17:31:47,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:31:47,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-14 17:31:47,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:31:47,060 INFO L225 Difference]: With dead ends: 50 [2020-10-14 17:31:47,060 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 17:31:47,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:31:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 17:31:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-14 17:31:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 17:31:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-14 17:31:47,112 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-10-14 17:31:47,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:31:47,112 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-14 17:31:47,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:31:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-14 17:31:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 17:31:47,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:31:47,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:31:47,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:31:47,115 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:31:47,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:31:47,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1573576037, now seen corresponding path program 1 times [2020-10-14 17:31:47,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:31:47,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312025251] [2020-10-14 17:31:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:31:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:31:47,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:47,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:47,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:47,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:48,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:48,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:48,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:48,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:49,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:49,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:31:49,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 17:31:49,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:31:49,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2421 [2020-10-14 17:31:49,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:31:49,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:31:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:31:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:31:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 17:31:49,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:31:49,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:31:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:31:49,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:49,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:31:49,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:31:49,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:31:49,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 17:31:49,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:31:49,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:31:49,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:31:49,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:31:49,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:31:49,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 17:31:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:31:49,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312025251] [2020-10-14 17:31:49,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:31:49,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 17:31:49,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194466365] [2020-10-14 17:31:49,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:31:49,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:31:49,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:31:49,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:31:49,662 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-10-14 17:31:49,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:31:49,822 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-14 17:31:49,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:31:49,823 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-14 17:31:49,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:31:49,824 INFO L225 Difference]: With dead ends: 44 [2020-10-14 17:31:49,824 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 17:31:49,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:31:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 17:31:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-14 17:31:49,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 17:31:49,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-14 17:31:49,844 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-10-14 17:31:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:31:49,847 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-14 17:31:49,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:31:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-14 17:31:49,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 17:31:49,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:31:49,849 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:31:49,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:31:49,850 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:31:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:31:49,852 INFO L82 PathProgramCache]: Analyzing trace with hash -458871105, now seen corresponding path program 2 times [2020-10-14 17:31:49,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:31:49,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102493987] [2020-10-14 17:31:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:31:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:31:49,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:49,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:49,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:51,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:51,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:51,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:52,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:53,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:53,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:53,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:54,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:54,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:54,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:54,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:31:54,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 17:31:54,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 17:31:54,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-14 17:31:54,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:31:54,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:31:54,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:31:54,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:31:54,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 17:31:54,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:31:54,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:31:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:31:54,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:54,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:31:54,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:31:54,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:31:54,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 17:31:54,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:31:54,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:31:54,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:31:54,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:31:54,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:31:54,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:31:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 17:31:54,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102493987] [2020-10-14 17:31:54,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:31:54,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:31:54,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049810407] [2020-10-14 17:31:54,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:31:54,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:31:54,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:31:54,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:31:55,000 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-10-14 17:31:55,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:31:55,200 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-14 17:31:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:31:55,201 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-14 17:31:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:31:55,203 INFO L225 Difference]: With dead ends: 54 [2020-10-14 17:31:55,203 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 17:31:55,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:31:55,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 17:31:55,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-14 17:31:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 17:31:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-14 17:31:55,223 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2020-10-14 17:31:55,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:31:55,224 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-14 17:31:55,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:31:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-14 17:31:55,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 17:31:55,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:31:55,228 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:31:55,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:31:55,233 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:31:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:31:55,234 INFO L82 PathProgramCache]: Analyzing trace with hash -936029031, now seen corresponding path program 3 times [2020-10-14 17:31:55,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:31:55,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667306334] [2020-10-14 17:31:55,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:31:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:31:55,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:55,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:55,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:57,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:57,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:58,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:58,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:58,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:59,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:31:59,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:00,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:00,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:00,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 17:32:00,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 17:32:00,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5084 [2020-10-14 17:32:00,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:00,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:00,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:32:00,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:32:00,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 17:32:00,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:32:00,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:32:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:00,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:00,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:00,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:32:00,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:32:00,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 17:32:00,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:00,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:00,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:32:00,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:32:00,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:32:00,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:32:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 17:32:00,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667306334] [2020-10-14 17:32:00,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:32:00,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:32:00,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757627075] [2020-10-14 17:32:00,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 17:32:00,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:32:00,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 17:32:00,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:32:00,463 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 8 states. [2020-10-14 17:32:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:32:00,737 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-14 17:32:00,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 17:32:00,738 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-14 17:32:00,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:32:00,740 INFO L225 Difference]: With dead ends: 64 [2020-10-14 17:32:00,740 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 17:32:00,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:32:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 17:32:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-10-14 17:32:00,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 17:32:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-14 17:32:00,749 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2020-10-14 17:32:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:32:00,750 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-14 17:32:00,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 17:32:00,750 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-14 17:32:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 17:32:00,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:32:00,752 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:32:00,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:32:00,753 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:32:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:32:00,753 INFO L82 PathProgramCache]: Analyzing trace with hash 981397235, now seen corresponding path program 4 times [2020-10-14 17:32:00,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:32:00,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971413373] [2020-10-14 17:32:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:32:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:00,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:00,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:00,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:05,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:05,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:05,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 17:32:05,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:32:05,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 17:32:05,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:05,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:05,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:32:05,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:32:05,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 17:32:05,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:32:05,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:32:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:05,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:05,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:05,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:32:05,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:32:05,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:32:05,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:05,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:05,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:32:05,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:32:05,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:32:05,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:32:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-14 17:32:05,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971413373] [2020-10-14 17:32:05,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:32:05,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 17:32:05,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979494701] [2020-10-14 17:32:05,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:32:05,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:32:05,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:32:05,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:32:05,883 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-10-14 17:32:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:32:06,126 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-10-14 17:32:06,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 17:32:06,126 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-14 17:32:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:32:06,127 INFO L225 Difference]: With dead ends: 74 [2020-10-14 17:32:06,127 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 17:32:06,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:32:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 17:32:06,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-14 17:32:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 17:32:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-14 17:32:06,141 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2020-10-14 17:32:06,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:32:06,142 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-14 17:32:06,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:32:06,142 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-14 17:32:06,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 17:32:06,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:32:06,146 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:32:06,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:32:06,146 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:32:06,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:32:06,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1276222925, now seen corresponding path program 5 times [2020-10-14 17:32:06,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:32:06,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165655406] [2020-10-14 17:32:06,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:32:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:06,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:06,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:06,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:11,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:11,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 17:32:11,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:32:11,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:32:11,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:11,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:11,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:32:11,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:32:11,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:32:11,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:32:11,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:32:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:11,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:11,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:11,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:32:11,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:32:11,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:32:11,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:11,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:11,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:32:11,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:32:11,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:32:11,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:32:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-14 17:32:11,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165655406] [2020-10-14 17:32:11,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:32:11,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:32:11,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339281721] [2020-10-14 17:32:11,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:32:11,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:32:11,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:32:11,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:32:11,274 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 10 states. [2020-10-14 17:32:11,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:32:11,499 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-14 17:32:11,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:32:11,499 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-14 17:32:11,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:32:11,500 INFO L225 Difference]: With dead ends: 84 [2020-10-14 17:32:11,500 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 17:32:11,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:32:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 17:32:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-14 17:32:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 17:32:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-14 17:32:11,514 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2020-10-14 17:32:11,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:32:11,514 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-14 17:32:11,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:32:11,514 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-14 17:32:11,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 17:32:11,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:32:11,516 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:32:11,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:32:11,516 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:32:11,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:32:11,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1711538471, now seen corresponding path program 6 times [2020-10-14 17:32:11,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:32:11,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748683617] [2020-10-14 17:32:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:32:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:11,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:11,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:11,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:16,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:16,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 17:32:16,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:32:16,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:32:16,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:16,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:16,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:32:16,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:32:16,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 17:32:16,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:32:16,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:32:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:16,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:16,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:16,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:32:16,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:32:16,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:32:16,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:16,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:16,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:32:16,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:32:16,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:32:16,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:32:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-14 17:32:16,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748683617] [2020-10-14 17:32:16,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:32:16,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:32:16,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862977828] [2020-10-14 17:32:16,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:32:16,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:32:16,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:32:16,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:32:16,653 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 11 states. [2020-10-14 17:32:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:32:16,911 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-10-14 17:32:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:32:16,912 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-14 17:32:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:32:16,913 INFO L225 Difference]: With dead ends: 94 [2020-10-14 17:32:16,915 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 17:32:16,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:32:16,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 17:32:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-10-14 17:32:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 17:32:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-14 17:32:16,928 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 51 [2020-10-14 17:32:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:32:16,929 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-14 17:32:16,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:32:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-14 17:32:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 17:32:16,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:32:16,930 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:32:16,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:32:16,931 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:32:16,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:32:16,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1140111617, now seen corresponding path program 7 times [2020-10-14 17:32:16,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:32:16,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161380173] [2020-10-14 17:32:16,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:32:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:16,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:16,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:17,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:21,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:21,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 17:32:21,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:32:21,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:32:21,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:21,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:21,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:32:21,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:32:21,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 17:32:21,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:32:22,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:32:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:22,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:22,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:22,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:32:22,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:32:22,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:32:22,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:22,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:32:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:32:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:32:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:32:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-14 17:32:22,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161380173] [2020-10-14 17:32:22,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:32:22,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:32:22,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768363884] [2020-10-14 17:32:22,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:32:22,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:32:22,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:32:22,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:32:22,090 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 12 states. [2020-10-14 17:32:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:32:22,412 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-10-14 17:32:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:32:22,412 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-14 17:32:22,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:32:22,413 INFO L225 Difference]: With dead ends: 104 [2020-10-14 17:32:22,413 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 17:32:22,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:32:22,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 17:32:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-10-14 17:32:22,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 17:32:22,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-14 17:32:22,422 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2020-10-14 17:32:22,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:32:22,422 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-14 17:32:22,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:32:22,422 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-14 17:32:22,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 17:32:22,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:32:22,423 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:32:22,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:32:22,424 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:32:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:32:22,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1846175067, now seen corresponding path program 8 times [2020-10-14 17:32:22,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:32:22,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654200967] [2020-10-14 17:32:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:32:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:22,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:22,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:24,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:24,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:27,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:27,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 17:32:27,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:32:27,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:32:27,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:27,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:27,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:32:27,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:32:27,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 17:32:27,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:32:27,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:32:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:27,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:27,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:27,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:32:27,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:32:27,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:32:27,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:27,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:27,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:32:27,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:32:27,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:32:27,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:32:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-14 17:32:27,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654200967] [2020-10-14 17:32:27,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:32:27,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:32:27,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812779750] [2020-10-14 17:32:27,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:32:27,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:32:27,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:32:27,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:32:27,609 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 13 states. [2020-10-14 17:32:27,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:32:27,946 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-10-14 17:32:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:32:27,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2020-10-14 17:32:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:32:27,948 INFO L225 Difference]: With dead ends: 114 [2020-10-14 17:32:27,948 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 17:32:27,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:32:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 17:32:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-10-14 17:32:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 17:32:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-14 17:32:27,967 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2020-10-14 17:32:27,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:32:27,968 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-14 17:32:27,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:32:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-14 17:32:27,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 17:32:27,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:32:27,972 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:32:27,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:32:27,972 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:32:27,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:32:27,973 INFO L82 PathProgramCache]: Analyzing trace with hash 854828597, now seen corresponding path program 9 times [2020-10-14 17:32:27,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:32:27,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085965260] [2020-10-14 17:32:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:32:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:27,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:28,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:30,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:31,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:33,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:33,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 17:32:33,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:32:33,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 17:32:33,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:33,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:33,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:32:33,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:32:33,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 17:32:33,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:32:33,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:32:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:33,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:33,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:33,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:32:33,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:32:33,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:32:33,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:33,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:33,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:32:33,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:32:33,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:32:33,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:32:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-14 17:32:33,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085965260] [2020-10-14 17:32:33,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:32:33,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:32:33,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653656831] [2020-10-14 17:32:33,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:32:33,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:32:33,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:32:33,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:32:33,152 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 14 states. [2020-10-14 17:32:33,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:32:33,495 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-10-14 17:32:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:32:33,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-10-14 17:32:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:32:33,498 INFO L225 Difference]: With dead ends: 124 [2020-10-14 17:32:33,498 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 17:32:33,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:32:33,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 17:32:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-10-14 17:32:33,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 17:32:33,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-14 17:32:33,507 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2020-10-14 17:32:33,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:32:33,507 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-14 17:32:33,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:32:33,508 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-14 17:32:33,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 17:32:33,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:32:33,509 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:32:33,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:32:33,509 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:32:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:32:33,510 INFO L82 PathProgramCache]: Analyzing trace with hash 568793999, now seen corresponding path program 10 times [2020-10-14 17:32:33,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:32:33,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966049526] [2020-10-14 17:32:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:32:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:33,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:33,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:36,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:37,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:39,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:39,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 17:32:39,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:32:39,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6432 [2020-10-14 17:32:39,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:39,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:39,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:32:39,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:32:39,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 17:32:39,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:32:40,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:32:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:40,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:40,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:40,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:32:40,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:32:40,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:32:40,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:40,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:40,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:32:40,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:32:40,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:32:40,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:32:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-14 17:32:40,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966049526] [2020-10-14 17:32:40,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:32:40,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:32:40,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826659306] [2020-10-14 17:32:40,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:32:40,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:32:40,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:32:40,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:32:40,116 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 15 states. [2020-10-14 17:32:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:32:40,517 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2020-10-14 17:32:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:32:40,518 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2020-10-14 17:32:40,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:32:40,519 INFO L225 Difference]: With dead ends: 134 [2020-10-14 17:32:40,519 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 17:32:40,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:32:40,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 17:32:40,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-14 17:32:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 17:32:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-14 17:32:40,529 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 75 [2020-10-14 17:32:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:32:40,529 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-14 17:32:40,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:32:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-14 17:32:40,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 17:32:40,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:32:40,531 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:32:40,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:32:40,531 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:32:40,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:32:40,532 INFO L82 PathProgramCache]: Analyzing trace with hash 77817193, now seen corresponding path program 11 times [2020-10-14 17:32:40,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:32:40,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557821071] [2020-10-14 17:32:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:32:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:40,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:40,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:45,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:45,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 17:32:45,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:32:45,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 17:32:45,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:45,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:45,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:32:45,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:32:45,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 17:32:45,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:32:45,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:32:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:45,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:45,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:45,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:32:45,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:32:45,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 17:32:45,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:45,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:45,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:32:45,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:32:45,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:32:45,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:32:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-14 17:32:45,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557821071] [2020-10-14 17:32:45,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:32:45,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:32:45,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189950789] [2020-10-14 17:32:45,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:32:45,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:32:45,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:32:45,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:32:45,810 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 16 states. [2020-10-14 17:32:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:32:46,343 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2020-10-14 17:32:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:32:46,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2020-10-14 17:32:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:32:46,345 INFO L225 Difference]: With dead ends: 144 [2020-10-14 17:32:46,345 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 17:32:46,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:32:46,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 17:32:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-10-14 17:32:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-14 17:32:46,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-14 17:32:46,373 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2020-10-14 17:32:46,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:32:46,374 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-14 17:32:46,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:32:46,374 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-14 17:32:46,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-14 17:32:46,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:32:46,376 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:32:46,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:32:46,378 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:32:46,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:32:46,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1500455875, now seen corresponding path program 12 times [2020-10-14 17:32:46,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:32:46,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057670525] [2020-10-14 17:32:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:32:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:46,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:46,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:51,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:51,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 17:32:51,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:32:51,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-14 17:32:51,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:51,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:51,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:32:51,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:32:51,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:32:51,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:32:51,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:32:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:51,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:51,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:51,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:32:51,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:32:51,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:32:51,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:51,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:51,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:32:51,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:32:51,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:32:51,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 17:32:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-14 17:32:51,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057670525] [2020-10-14 17:32:51,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:32:51,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:32:51,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552926503] [2020-10-14 17:32:51,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:32:51,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:32:51,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:32:51,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:32:51,648 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 17 states. [2020-10-14 17:32:52,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:32:52,123 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2020-10-14 17:32:52,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:32:52,123 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 87 [2020-10-14 17:32:52,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:32:52,124 INFO L225 Difference]: With dead ends: 154 [2020-10-14 17:32:52,125 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 17:32:52,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=321, Invalid=609, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:32:52,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 17:32:52,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-10-14 17:32:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 17:32:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-14 17:32:52,142 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 87 [2020-10-14 17:32:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:32:52,147 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-14 17:32:52,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:32:52,147 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-14 17:32:52,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-14 17:32:52,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:32:52,149 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:32:52,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:32:52,151 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:32:52,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:32:52,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1293481629, now seen corresponding path program 13 times [2020-10-14 17:32:52,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:32:52,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173287183] [2020-10-14 17:32:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:32:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:52,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:52,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:57,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:57,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 17:32:57,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:32:57,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-14 17:32:57,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:57,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:32:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:32:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 17:32:57,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:32:57,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:32:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:57,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:57,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:32:57,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:32:57,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:32:57,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:32:57,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:32:57,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:32:57,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:32:57,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:32:57,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:32:57,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:32:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-14 17:32:57,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173287183] [2020-10-14 17:32:57,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:32:57,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:32:57,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110270256] [2020-10-14 17:32:57,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:32:57,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:32:57,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:32:57,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:32:57,417 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 18 states. [2020-10-14 17:32:57,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:32:57,965 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2020-10-14 17:32:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:32:57,966 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 93 [2020-10-14 17:32:57,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:32:57,967 INFO L225 Difference]: With dead ends: 164 [2020-10-14 17:32:57,967 INFO L226 Difference]: Without dead ends: 103 [2020-10-14 17:32:57,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=642, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:32:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-14 17:32:57,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2020-10-14 17:32:57,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 17:32:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-10-14 17:32:57,985 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2020-10-14 17:32:57,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:32:57,985 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-10-14 17:32:57,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:32:57,985 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-10-14 17:32:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 17:32:57,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:32:57,990 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:32:57,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:32:57,990 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:32:57,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:32:57,991 INFO L82 PathProgramCache]: Analyzing trace with hash 888634871, now seen corresponding path program 14 times [2020-10-14 17:32:57,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:32:57,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147983229] [2020-10-14 17:32:57,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:32:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:32:58,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:32:58,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:03,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:03,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-14 17:33:03,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:33:03,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 17:33:03,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:03,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:03,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 17:33:03,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:33:03,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 17:33:03,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:03,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:33:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:03,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:03,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:03,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:33:03,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:33:03,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:33:03,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:03,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:03,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:33:03,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:33:03,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:33:03,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-14 17:33:03,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147983229] [2020-10-14 17:33:03,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:33:03,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:33:03,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71316815] [2020-10-14 17:33:03,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 17:33:03,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:33:03,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 17:33:03,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:33:03,264 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 19 states. [2020-10-14 17:33:03,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:33:03,843 INFO L93 Difference]: Finished difference Result 174 states and 180 transitions. [2020-10-14 17:33:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:33:03,844 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 99 [2020-10-14 17:33:03,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:33:03,845 INFO L225 Difference]: With dead ends: 174 [2020-10-14 17:33:03,845 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 17:33:03,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=725, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:33:03,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 17:33:03,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2020-10-14 17:33:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 17:33:03,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-14 17:33:03,853 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 99 [2020-10-14 17:33:03,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:33:03,853 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-14 17:33:03,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 17:33:03,853 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-14 17:33:03,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-14 17:33:03,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:33:03,855 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:33:03,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:33:03,855 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:33:03,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:33:03,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1997973039, now seen corresponding path program 15 times [2020-10-14 17:33:03,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:33:03,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734063029] [2020-10-14 17:33:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:33:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:03,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:03,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:08,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:08,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-14 17:33:08,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:33:08,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-14 17:33:08,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:08,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:08,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:33:08,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:33:08,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 17:33:08,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:09,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:33:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:09,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:09,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:09,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:33:09,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:33:09,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:33:09,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:09,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:09,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:33:09,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:33:09,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:33:09,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2020-10-14 17:33:09,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734063029] [2020-10-14 17:33:09,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:33:09,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 17:33:09,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069777870] [2020-10-14 17:33:09,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:33:09,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:33:09,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:33:09,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:33:09,149 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 20 states. [2020-10-14 17:33:09,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:33:09,750 INFO L93 Difference]: Finished difference Result 184 states and 190 transitions. [2020-10-14 17:33:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:33:09,750 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2020-10-14 17:33:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:33:09,752 INFO L225 Difference]: With dead ends: 184 [2020-10-14 17:33:09,752 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 17:33:09,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=447, Invalid=813, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:33:09,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 17:33:09,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-10-14 17:33:09,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 17:33:09,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-14 17:33:09,760 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 105 [2020-10-14 17:33:09,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:33:09,760 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-14 17:33:09,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:33:09,761 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-14 17:33:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-14 17:33:09,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:33:09,761 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:33:09,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:33:09,762 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:33:09,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:33:09,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1565862443, now seen corresponding path program 16 times [2020-10-14 17:33:09,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:33:09,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494812453] [2020-10-14 17:33:09,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:33:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:09,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:09,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:14,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:14,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-14 17:33:14,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:33:14,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 17:33:14,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:14,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:14,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 17:33:14,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:33:14,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 17:33:14,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:15,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:33:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:15,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:15,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:15,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:33:15,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:33:15,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:33:15,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:15,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:15,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:33:15,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:33:15,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:33:15,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-14 17:33:15,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494812453] [2020-10-14 17:33:15,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:33:15,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:33:15,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411167728] [2020-10-14 17:33:15,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 17:33:15,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:33:15,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 17:33:15,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:33:15,065 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 21 states. [2020-10-14 17:33:15,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:33:15,735 INFO L93 Difference]: Finished difference Result 194 states and 200 transitions. [2020-10-14 17:33:15,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:33:15,736 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 111 [2020-10-14 17:33:15,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:33:15,738 INFO L225 Difference]: With dead ends: 194 [2020-10-14 17:33:15,738 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 17:33:15,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=519, Invalid=963, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:33:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 17:33:15,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2020-10-14 17:33:15,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-14 17:33:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-14 17:33:15,750 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 111 [2020-10-14 17:33:15,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:33:15,750 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-14 17:33:15,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 17:33:15,750 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-14 17:33:15,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-14 17:33:15,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:33:15,752 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:33:15,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:33:15,752 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:33:15,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:33:15,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1563004677, now seen corresponding path program 17 times [2020-10-14 17:33:15,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:33:15,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963516024] [2020-10-14 17:33:15,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:33:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:15,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:15,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:20,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:20,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-14 17:33:20,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:33:20,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-14 17:33:20,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:20,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:20,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:33:20,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:33:20,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 17:33:20,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:21,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:33:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:21,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:21,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:21,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:33:21,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:33:21,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:33:21,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:21,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:21,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:33:21,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:33:21,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:33:21,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-10-14 17:33:21,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963516024] [2020-10-14 17:33:21,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:33:21,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 17:33:21,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104483480] [2020-10-14 17:33:21,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:33:21,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:33:21,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:33:21,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:33:21,088 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 22 states. [2020-10-14 17:33:21,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:33:21,808 INFO L93 Difference]: Finished difference Result 204 states and 210 transitions. [2020-10-14 17:33:21,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:33:21,808 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 117 [2020-10-14 17:33:21,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:33:21,810 INFO L225 Difference]: With dead ends: 204 [2020-10-14 17:33:21,810 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 17:33:21,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=556, Invalid=1004, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 17:33:21,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 17:33:21,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2020-10-14 17:33:21,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 17:33:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-10-14 17:33:21,818 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 117 [2020-10-14 17:33:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:33:21,819 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-10-14 17:33:21,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 17:33:21,819 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-10-14 17:33:21,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-14 17:33:21,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:33:21,820 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:33:21,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:33:21,820 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:33:21,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:33:21,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1138567263, now seen corresponding path program 18 times [2020-10-14 17:33:21,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:33:21,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792656902] [2020-10-14 17:33:21,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:33:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:21,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:21,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:26,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:26,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-14 17:33:26,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:33:26,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-14 17:33:26,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:26,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:26,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 17:33:26,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:33:26,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 17:33:26,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:27,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:33:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:27,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:27,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:27,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:33:27,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:33:27,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:33:27,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:27,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:27,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:33:27,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:33:27,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:33:27,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-14 17:33:27,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792656902] [2020-10-14 17:33:27,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:33:27,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:33:27,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330344301] [2020-10-14 17:33:27,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 17:33:27,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:33:27,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 17:33:27,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:33:27,190 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 23 states. [2020-10-14 17:33:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:33:27,945 INFO L93 Difference]: Finished difference Result 214 states and 220 transitions. [2020-10-14 17:33:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 17:33:27,945 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 123 [2020-10-14 17:33:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:33:27,947 INFO L225 Difference]: With dead ends: 214 [2020-10-14 17:33:27,947 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 17:33:27,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=636, Invalid=1170, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 17:33:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 17:33:27,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2020-10-14 17:33:27,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 17:33:27,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-10-14 17:33:27,956 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2020-10-14 17:33:27,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:33:27,957 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-10-14 17:33:27,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 17:33:27,957 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-10-14 17:33:27,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-14 17:33:27,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:33:27,958 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:33:27,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:33:27,958 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:33:27,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:33:27,959 INFO L82 PathProgramCache]: Analyzing trace with hash -680618439, now seen corresponding path program 19 times [2020-10-14 17:33:27,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:33:27,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671297941] [2020-10-14 17:33:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:33:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:27,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:28,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:33,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:33,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-14 17:33:33,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:33:33,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5132 [2020-10-14 17:33:33,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:33,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:33,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 17:33:33,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:33:33,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 17:33:33,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:33,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:33:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:33,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:33,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:33,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:33:33,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:33:33,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:33:33,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:33,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:33,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:33:33,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:33:33,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:33:33,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2020-10-14 17:33:33,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671297941] [2020-10-14 17:33:33,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:33:33,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 17:33:33,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847979674] [2020-10-14 17:33:33,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 17:33:33,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:33:33,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 17:33:33,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:33:33,459 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 24 states. [2020-10-14 17:33:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:33:34,193 INFO L93 Difference]: Finished difference Result 224 states and 230 transitions. [2020-10-14 17:33:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:33:34,194 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 129 [2020-10-14 17:33:34,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:33:34,195 INFO L225 Difference]: With dead ends: 224 [2020-10-14 17:33:34,195 INFO L226 Difference]: Without dead ends: 139 [2020-10-14 17:33:34,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=699, Invalid=1281, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 17:33:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-14 17:33:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2020-10-14 17:33:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-14 17:33:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2020-10-14 17:33:34,204 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 129 [2020-10-14 17:33:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:33:34,205 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2020-10-14 17:33:34,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 17:33:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2020-10-14 17:33:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-14 17:33:34,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:33:34,206 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:33:34,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:33:34,207 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:33:34,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:33:34,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1650751635, now seen corresponding path program 20 times [2020-10-14 17:33:34,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:33:34,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582595345] [2020-10-14 17:33:34,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:33:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:34,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:34,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:39,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:39,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-14 17:33:39,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:33:39,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-14 17:33:39,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:39,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:39,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 17:33:39,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:33:39,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 17:33:39,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:39,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:33:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:39,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:39,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:39,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:33:39,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:33:39,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:33:39,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:39,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:33:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:33:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:33:39,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-14 17:33:39,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582595345] [2020-10-14 17:33:39,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:33:39,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 17:33:39,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633177376] [2020-10-14 17:33:39,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 17:33:39,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:33:39,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 17:33:39,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:33:39,652 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 25 states. [2020-10-14 17:33:40,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:33:40,450 INFO L93 Difference]: Finished difference Result 234 states and 240 transitions. [2020-10-14 17:33:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 17:33:40,454 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 135 [2020-10-14 17:33:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:33:40,455 INFO L225 Difference]: With dead ends: 234 [2020-10-14 17:33:40,455 INFO L226 Difference]: Without dead ends: 145 [2020-10-14 17:33:40,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=742, Invalid=1328, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 17:33:40,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-14 17:33:40,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-10-14 17:33:40,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-14 17:33:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2020-10-14 17:33:40,463 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 135 [2020-10-14 17:33:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:33:40,464 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2020-10-14 17:33:40,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 17:33:40,464 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2020-10-14 17:33:40,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-14 17:33:40,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:33:40,466 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:33:40,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 17:33:40,466 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:33:40,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:33:40,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1379045523, now seen corresponding path program 21 times [2020-10-14 17:33:40,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:33:40,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249392860] [2020-10-14 17:33:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:33:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:40,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:40,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:45,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:45,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-14 17:33:45,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:33:45,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-14 17:33:45,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:45,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 17:33:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:33:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 17:33:45,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:45,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:33:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:45,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:45,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:45,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:33:45,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:33:45,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:33:45,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:45,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:45,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:33:45,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:33:45,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:33:45,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2020-10-14 17:33:45,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249392860] [2020-10-14 17:33:45,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:33:45,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 17:33:45,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392380052] [2020-10-14 17:33:45,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 17:33:45,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:33:45,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 17:33:45,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:33:45,948 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 26 states. [2020-10-14 17:33:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:33:46,870 INFO L93 Difference]: Finished difference Result 244 states and 250 transitions. [2020-10-14 17:33:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:33:46,873 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 141 [2020-10-14 17:33:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:33:46,875 INFO L225 Difference]: With dead ends: 244 [2020-10-14 17:33:46,875 INFO L226 Difference]: Without dead ends: 151 [2020-10-14 17:33:46,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=834, Invalid=1518, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 17:33:46,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-14 17:33:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2020-10-14 17:33:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 17:33:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2020-10-14 17:33:46,883 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 141 [2020-10-14 17:33:46,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:33:46,883 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2020-10-14 17:33:46,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 17:33:46,884 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2020-10-14 17:33:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-14 17:33:46,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:33:46,885 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:33:46,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 17:33:46,886 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:33:46,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:33:46,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2067798727, now seen corresponding path program 22 times [2020-10-14 17:33:46,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:33:46,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514702489] [2020-10-14 17:33:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:33:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:46,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:46,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:51,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:51,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-14 17:33:51,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:33:51,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:33:51,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:51,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:51,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 17:33:51,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:33:51,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-14 17:33:51,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:52,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:33:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:52,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:52,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:52,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:33:52,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:33:52,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:33:52,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:52,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:33:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:33:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:33:52,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-14 17:33:52,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514702489] [2020-10-14 17:33:52,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:33:52,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 17:33:52,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077811644] [2020-10-14 17:33:52,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 17:33:52,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:33:52,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 17:33:52,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:33:52,365 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 27 states. [2020-10-14 17:33:53,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:33:53,358 INFO L93 Difference]: Finished difference Result 254 states and 260 transitions. [2020-10-14 17:33:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 17:33:53,358 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 147 [2020-10-14 17:33:53,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:33:53,360 INFO L225 Difference]: With dead ends: 254 [2020-10-14 17:33:53,360 INFO L226 Difference]: Without dead ends: 157 [2020-10-14 17:33:53,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=906, Invalid=1644, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 17:33:53,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-14 17:33:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2020-10-14 17:33:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-14 17:33:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-10-14 17:33:53,369 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 147 [2020-10-14 17:33:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:33:53,369 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-10-14 17:33:53,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 17:33:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-10-14 17:33:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-14 17:33:53,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:33:53,371 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:33:53,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 17:33:53,371 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:33:53,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:33:53,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2128288417, now seen corresponding path program 23 times [2020-10-14 17:33:53,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:33:53,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749336814] [2020-10-14 17:33:53,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:33:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:53,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:53,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:58,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:58,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-14 17:33:58,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:33:58,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5123 [2020-10-14 17:33:58,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:58,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:58,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 17:33:58,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:33:58,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-14 17:33:58,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:58,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:33:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:33:58,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:33:58,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:33:58,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:33:58,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:33:58,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:33:58,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:33:58,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:33:58,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:33:58,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:33:58,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:33:58,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:33:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2020-10-14 17:33:59,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749336814] [2020-10-14 17:33:59,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:33:59,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 17:33:59,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790809253] [2020-10-14 17:33:59,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 17:33:59,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:33:59,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 17:33:59,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:33:59,014 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 28 states. [2020-10-14 17:33:59,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:33:59,994 INFO L93 Difference]: Finished difference Result 264 states and 270 transitions. [2020-10-14 17:33:59,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 17:33:59,995 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 153 [2020-10-14 17:33:59,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:33:59,996 INFO L225 Difference]: With dead ends: 264 [2020-10-14 17:33:59,997 INFO L226 Difference]: Without dead ends: 163 [2020-10-14 17:33:59,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=981, Invalid=1775, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 17:33:59,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-14 17:34:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2020-10-14 17:34:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-14 17:34:00,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2020-10-14 17:34:00,004 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 153 [2020-10-14 17:34:00,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:34:00,004 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2020-10-14 17:34:00,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 17:34:00,005 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2020-10-14 17:34:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-14 17:34:00,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:34:00,006 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:34:00,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 17:34:00,006 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:34:00,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:34:00,007 INFO L82 PathProgramCache]: Analyzing trace with hash -649785605, now seen corresponding path program 24 times [2020-10-14 17:34:00,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:34:00,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389969776] [2020-10-14 17:34:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:34:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:00,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:00,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:05,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:05,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-14 17:34:05,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:34:05,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-14 17:34:05,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:05,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:05,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 17:34:05,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:34:05,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 17:34:05,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:34:05,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:34:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:05,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:05,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:05,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:34:05,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:34:05,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:34:05,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:05,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:34:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:34:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:34:05,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:34:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-14 17:34:05,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389969776] [2020-10-14 17:34:05,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:34:05,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 17:34:05,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371456906] [2020-10-14 17:34:05,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 17:34:05,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:34:05,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 17:34:05,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:34:05,637 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 29 states. [2020-10-14 17:34:06,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:34:06,746 INFO L93 Difference]: Finished difference Result 274 states and 280 transitions. [2020-10-14 17:34:06,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 17:34:06,747 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 159 [2020-10-14 17:34:06,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:34:06,748 INFO L225 Difference]: With dead ends: 274 [2020-10-14 17:34:06,748 INFO L226 Difference]: Without dead ends: 169 [2020-10-14 17:34:06,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1059, Invalid=1911, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 17:34:06,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-14 17:34:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2020-10-14 17:34:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-14 17:34:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2020-10-14 17:34:06,757 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 159 [2020-10-14 17:34:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:34:06,757 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2020-10-14 17:34:06,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 17:34:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2020-10-14 17:34:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-14 17:34:06,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:34:06,758 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:34:06,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 17:34:06,758 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:34:06,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:34:06,759 INFO L82 PathProgramCache]: Analyzing trace with hash 296523733, now seen corresponding path program 25 times [2020-10-14 17:34:06,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:34:06,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170725266] [2020-10-14 17:34:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:34:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:06,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:06,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:11,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:11,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-14 17:34:11,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:34:11,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5108 [2020-10-14 17:34:11,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:11,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:11,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:34:11,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:34:11,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-14 17:34:11,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:34:12,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:34:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:12,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:12,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:12,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:34:12,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:34:12,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:34:12,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:12,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:12,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:34:12,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:34:12,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:34:12,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:34:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2020-10-14 17:34:12,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170725266] [2020-10-14 17:34:12,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:34:12,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 17:34:12,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730614193] [2020-10-14 17:34:12,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 17:34:12,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:34:12,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 17:34:12,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:34:12,637 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 30 states. [2020-10-14 17:34:13,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:34:13,911 INFO L93 Difference]: Finished difference Result 284 states and 290 transitions. [2020-10-14 17:34:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 17:34:13,912 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 165 [2020-10-14 17:34:13,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:34:13,914 INFO L225 Difference]: With dead ends: 284 [2020-10-14 17:34:13,914 INFO L226 Difference]: Without dead ends: 175 [2020-10-14 17:34:13,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1140, Invalid=2052, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 17:34:13,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-14 17:34:13,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-10-14 17:34:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-14 17:34:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2020-10-14 17:34:13,925 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 165 [2020-10-14 17:34:13,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:34:13,925 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2020-10-14 17:34:13,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 17:34:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2020-10-14 17:34:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-14 17:34:13,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:34:13,926 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:34:13,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 17:34:13,927 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:34:13,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:34:13,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1882696401, now seen corresponding path program 26 times [2020-10-14 17:34:13,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:34:13,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283727564] [2020-10-14 17:34:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:34:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:13,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:14,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:19,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:19,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-14 17:34:19,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:34:19,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-14 17:34:19,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:19,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:19,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 17:34:19,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:34:19,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-14 17:34:19,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:34:19,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:34:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:19,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:19,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:19,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:34:19,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:34:19,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:34:19,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:19,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:19,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:34:19,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:34:19,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:34:19,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:34:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-14 17:34:19,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283727564] [2020-10-14 17:34:19,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:34:19,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 17:34:19,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786036682] [2020-10-14 17:34:19,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 17:34:19,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:34:19,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 17:34:19,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:34:19,710 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 31 states. [2020-10-14 17:34:20,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:34:20,797 INFO L93 Difference]: Finished difference Result 294 states and 300 transitions. [2020-10-14 17:34:20,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 17:34:20,798 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 171 [2020-10-14 17:34:20,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:34:20,799 INFO L225 Difference]: With dead ends: 294 [2020-10-14 17:34:20,799 INFO L226 Difference]: Without dead ends: 181 [2020-10-14 17:34:20,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1224, Invalid=2198, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 17:34:20,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-14 17:34:20,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2020-10-14 17:34:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-14 17:34:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2020-10-14 17:34:20,814 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 171 [2020-10-14 17:34:20,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:34:20,814 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2020-10-14 17:34:20,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 17:34:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2020-10-14 17:34:20,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-14 17:34:20,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:34:20,816 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:34:20,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 17:34:20,817 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:34:20,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:34:20,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1781078263, now seen corresponding path program 27 times [2020-10-14 17:34:20,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:34:20,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055643664] [2020-10-14 17:34:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:34:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:20,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:20,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:26,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:26,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-14 17:34:26,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:34:26,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5314 [2020-10-14 17:34:26,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:26,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:26,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 17:34:26,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:34:26,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-14 17:34:26,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:34:26,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:34:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:26,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:26,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:26,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:34:26,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:34:26,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:34:26,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:26,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:26,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:34:26,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:34:26,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:34:26,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:34:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2020-10-14 17:34:26,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055643664] [2020-10-14 17:34:26,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:34:26,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 17:34:26,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244066931] [2020-10-14 17:34:26,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 17:34:26,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:34:26,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 17:34:26,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:34:26,807 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 32 states. [2020-10-14 17:34:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:34:28,094 INFO L93 Difference]: Finished difference Result 304 states and 310 transitions. [2020-10-14 17:34:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 17:34:28,095 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 177 [2020-10-14 17:34:28,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:34:28,096 INFO L225 Difference]: With dead ends: 304 [2020-10-14 17:34:28,096 INFO L226 Difference]: Without dead ends: 187 [2020-10-14 17:34:28,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1311, Invalid=2349, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 17:34:28,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-14 17:34:28,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2020-10-14 17:34:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-14 17:34:28,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2020-10-14 17:34:28,106 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 177 [2020-10-14 17:34:28,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:34:28,107 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2020-10-14 17:34:28,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 17:34:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2020-10-14 17:34:28,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-14 17:34:28,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:34:28,108 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:34:28,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 17:34:28,109 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:34:28,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:34:28,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1163989661, now seen corresponding path program 28 times [2020-10-14 17:34:28,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:34:28,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912762312] [2020-10-14 17:34:28,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:34:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:28,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:28,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:33,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:33,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-14 17:34:33,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:34:33,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-14 17:34:33,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:33,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:33,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 17:34:33,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:34:33,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-14 17:34:33,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:34:33,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:34:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:33,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:33,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:33,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:34:33,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:34:33,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:34:33,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:33,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:33,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:34:33,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:34:33,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:34:33,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:34:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-10-14 17:34:33,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912762312] [2020-10-14 17:34:33,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:34:33,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 17:34:33,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328579978] [2020-10-14 17:34:33,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 17:34:33,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:34:33,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 17:34:33,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:34:33,934 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 33 states. [2020-10-14 17:34:35,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:34:35,321 INFO L93 Difference]: Finished difference Result 314 states and 320 transitions. [2020-10-14 17:34:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 17:34:35,322 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 183 [2020-10-14 17:34:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:34:35,324 INFO L225 Difference]: With dead ends: 314 [2020-10-14 17:34:35,324 INFO L226 Difference]: Without dead ends: 193 [2020-10-14 17:34:35,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1401, Invalid=2505, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 17:34:35,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-14 17:34:35,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2020-10-14 17:34:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-14 17:34:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2020-10-14 17:34:35,333 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 183 [2020-10-14 17:34:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:34:35,334 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2020-10-14 17:34:35,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 17:34:35,334 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2020-10-14 17:34:35,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-14 17:34:35,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:34:35,335 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:34:35,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 17:34:35,335 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:34:35,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:34:35,336 INFO L82 PathProgramCache]: Analyzing trace with hash -479262659, now seen corresponding path program 29 times [2020-10-14 17:34:35,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:34:35,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629485188] [2020-10-14 17:34:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:34:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:35,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:35,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:40,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:40,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-14 17:34:40,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:34:40,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5128 [2020-10-14 17:34:40,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:40,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:40,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 17:34:40,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:34:40,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-14 17:34:40,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:34:41,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:34:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:41,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:41,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:41,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:34:41,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:34:41,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:34:41,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:41,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:41,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:34:41,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:34:41,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:34:41,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:34:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2523 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2020-10-14 17:34:41,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629485188] [2020-10-14 17:34:41,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:34:41,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 17:34:41,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407390208] [2020-10-14 17:34:41,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 17:34:41,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:34:41,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 17:34:41,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:34:41,230 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 34 states. [2020-10-14 17:34:42,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:34:42,825 INFO L93 Difference]: Finished difference Result 324 states and 330 transitions. [2020-10-14 17:34:42,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 17:34:42,826 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 189 [2020-10-14 17:34:42,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:34:42,827 INFO L225 Difference]: With dead ends: 324 [2020-10-14 17:34:42,828 INFO L226 Difference]: Without dead ends: 199 [2020-10-14 17:34:42,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1494, Invalid=2666, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 17:34:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-14 17:34:42,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2020-10-14 17:34:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-14 17:34:42,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2020-10-14 17:34:42,839 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 189 [2020-10-14 17:34:42,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:34:42,839 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2020-10-14 17:34:42,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 17:34:42,840 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2020-10-14 17:34:42,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-14 17:34:42,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:34:42,842 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:34:42,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 17:34:42,842 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:34:42,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:34:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1105340521, now seen corresponding path program 30 times [2020-10-14 17:34:42,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:34:42,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267828505] [2020-10-14 17:34:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:34:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:42,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:42,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:47,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:47,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-14 17:34:47,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:34:47,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-14 17:34:47,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:47,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:47,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 17:34:47,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:34:47,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-14 17:34:47,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:34:48,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:34:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:48,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:48,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:48,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:34:48,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:34:48,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:34:48,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:48,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:34:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:34:48,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:34:48,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:34:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-14 17:34:48,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267828505] [2020-10-14 17:34:48,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:34:48,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 17:34:48,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245985931] [2020-10-14 17:34:48,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 17:34:48,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:34:48,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 17:34:48,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:34:48,759 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 35 states. [2020-10-14 17:34:50,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:34:50,300 INFO L93 Difference]: Finished difference Result 334 states and 340 transitions. [2020-10-14 17:34:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 17:34:50,301 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 195 [2020-10-14 17:34:50,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:34:50,303 INFO L225 Difference]: With dead ends: 334 [2020-10-14 17:34:50,303 INFO L226 Difference]: Without dead ends: 205 [2020-10-14 17:34:50,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1590, Invalid=2832, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 17:34:50,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-14 17:34:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-10-14 17:34:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-14 17:34:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2020-10-14 17:34:50,313 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 195 [2020-10-14 17:34:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:34:50,313 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2020-10-14 17:34:50,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 17:34:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2020-10-14 17:34:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-14 17:34:50,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:34:50,315 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:34:50,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 17:34:50,315 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:34:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:34:50,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1156973711, now seen corresponding path program 31 times [2020-10-14 17:34:50,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:34:50,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624676373] [2020-10-14 17:34:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:34:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:50,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:50,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:55,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:55,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-14 17:34:55,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:34:55,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 17:34:55,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:55,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:55,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 17:34:55,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:34:55,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-14 17:34:55,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:34:56,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:34:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:56,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:56,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:34:56,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:34:56,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:34:56,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:34:56,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:34:56,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:34:56,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:34:56,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:34:56,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:34:56,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:34:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2020-10-14 17:34:56,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624676373] [2020-10-14 17:34:56,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:34:56,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 17:34:56,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628339963] [2020-10-14 17:34:56,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 17:34:56,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:34:56,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 17:34:56,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:34:56,180 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand 36 states. [2020-10-14 17:34:57,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:34:57,745 INFO L93 Difference]: Finished difference Result 344 states and 350 transitions. [2020-10-14 17:34:57,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 17:34:57,746 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 201 [2020-10-14 17:34:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:34:57,748 INFO L225 Difference]: With dead ends: 344 [2020-10-14 17:34:57,748 INFO L226 Difference]: Without dead ends: 211 [2020-10-14 17:34:57,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1689, Invalid=3003, Unknown=0, NotChecked=0, Total=4692 [2020-10-14 17:34:57,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-14 17:34:57,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-10-14 17:34:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-14 17:34:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2020-10-14 17:34:57,758 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 201 [2020-10-14 17:34:57,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:34:57,758 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2020-10-14 17:34:57,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 17:34:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2020-10-14 17:34:57,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-14 17:34:57,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:34:57,760 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:34:57,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 17:34:57,760 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:34:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:34:57,760 INFO L82 PathProgramCache]: Analyzing trace with hash -2028334133, now seen corresponding path program 32 times [2020-10-14 17:34:57,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:34:57,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595466304] [2020-10-14 17:34:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:34:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:34:57,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:34:57,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:35:02,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:35:02,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-14 17:35:02,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:35:02,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5141 [2020-10-14 17:35:02,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:35:02,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:35:02,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 17:35:02,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:35:02,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-14 17:35:02,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:35:03,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:35:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:35:03,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:35:03,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:35:03,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:35:03,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:35:03,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:35:03,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:35:03,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:35:03,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:35:03,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:35:03,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:35:03,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:35:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2020-10-14 17:35:03,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595466304] [2020-10-14 17:35:03,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:35:03,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 17:35:03,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296778915] [2020-10-14 17:35:03,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 17:35:03,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:35:03,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 17:35:03,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:35:03,808 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand 37 states. [2020-10-14 17:35:05,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:35:05,477 INFO L93 Difference]: Finished difference Result 354 states and 360 transitions. [2020-10-14 17:35:05,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 17:35:05,478 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 207 [2020-10-14 17:35:05,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:35:05,480 INFO L225 Difference]: With dead ends: 354 [2020-10-14 17:35:05,480 INFO L226 Difference]: Without dead ends: 217 [2020-10-14 17:35:05,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1791, Invalid=3179, Unknown=0, NotChecked=0, Total=4970 [2020-10-14 17:35:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-14 17:35:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2020-10-14 17:35:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-14 17:35:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2020-10-14 17:35:05,489 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 207 [2020-10-14 17:35:05,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:35:05,489 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2020-10-14 17:35:05,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 17:35:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2020-10-14 17:35:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-14 17:35:05,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:35:05,491 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:35:05,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 17:35:05,491 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:35:05,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:35:05,492 INFO L82 PathProgramCache]: Analyzing trace with hash 96256165, now seen corresponding path program 33 times [2020-10-14 17:35:05,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:35:05,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623464384] [2020-10-14 17:35:05,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:35:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:35:05,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:35:05,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:35:10,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:35:10,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-14 17:35:10,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:35:10,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5372 [2020-10-14 17:35:10,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:35:10,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:35:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 17:35:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:35:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-14 17:35:10,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:35:11,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:35:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:35:11,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:35:11,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:35:11,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:35:11,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:35:11,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:35:11,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:35:11,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:35:11,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:35:11,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:35:11,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:35:11,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:35:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2020-10-14 17:35:11,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623464384] [2020-10-14 17:35:11,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:35:11,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 17:35:11,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37601738] [2020-10-14 17:35:11,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 17:35:11,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:35:11,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 17:35:11,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:35:11,832 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand 38 states. [2020-10-14 17:35:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:35:13,584 INFO L93 Difference]: Finished difference Result 364 states and 370 transitions. [2020-10-14 17:35:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 17:35:13,585 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 213 [2020-10-14 17:35:13,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:35:13,587 INFO L225 Difference]: With dead ends: 364 [2020-10-14 17:35:13,587 INFO L226 Difference]: Without dead ends: 223 [2020-10-14 17:35:13,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1896, Invalid=3360, Unknown=0, NotChecked=0, Total=5256 [2020-10-14 17:35:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-14 17:35:13,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 220. [2020-10-14 17:35:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-14 17:35:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2020-10-14 17:35:13,596 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 213 [2020-10-14 17:35:13,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:35:13,597 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2020-10-14 17:35:13,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 17:35:13,597 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2020-10-14 17:35:13,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-14 17:35:13,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:35:13,598 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:35:13,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 17:35:13,599 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:35:13,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:35:13,599 INFO L82 PathProgramCache]: Analyzing trace with hash -890723841, now seen corresponding path program 34 times [2020-10-14 17:35:13,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:35:13,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392900902] [2020-10-14 17:35:13,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:35:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:35:13,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:35:13,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:35:18,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:35:18,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-14 17:35:18,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:35:18,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5104 [2020-10-14 17:35:18,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:35:18,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:35:18,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 17:35:18,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:35:18,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-14 17:35:18,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:35:19,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:35:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:35:19,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:35:19,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:35:19,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:35:19,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:35:19,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:35:19,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:35:19,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:35:19,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:35:19,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:35:19,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:35:19,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:35:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-10-14 17:35:19,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392900902] [2020-10-14 17:35:19,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:35:19,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 17:35:19,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821916283] [2020-10-14 17:35:19,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 17:35:19,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:35:19,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 17:35:19,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:35:19,718 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 39 states. [2020-10-14 17:35:21,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:35:21,614 INFO L93 Difference]: Finished difference Result 374 states and 380 transitions. [2020-10-14 17:35:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 17:35:21,615 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 219 [2020-10-14 17:35:21,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:35:21,617 INFO L225 Difference]: With dead ends: 374 [2020-10-14 17:35:21,617 INFO L226 Difference]: Without dead ends: 229 [2020-10-14 17:35:21,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2004, Invalid=3546, Unknown=0, NotChecked=0, Total=5550 [2020-10-14 17:35:21,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-14 17:35:21,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2020-10-14 17:35:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-14 17:35:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2020-10-14 17:35:21,632 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 219 [2020-10-14 17:35:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:35:21,633 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2020-10-14 17:35:21,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 17:35:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2020-10-14 17:35:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-14 17:35:21,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:35:21,636 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:35:21,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 17:35:21,636 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:35:21,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:35:21,636 INFO L82 PathProgramCache]: Analyzing trace with hash 354179033, now seen corresponding path program 35 times [2020-10-14 17:35:21,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:35:21,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328754007] [2020-10-14 17:35:21,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:35:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:35:21,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:35:21,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:35:26,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:35:26,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-14 17:35:26,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:35:26,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5215 [2020-10-14 17:35:26,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:35:26,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:35:26,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 17:35:26,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:35:26,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-14 17:35:26,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:35:27,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:35:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:35:27,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:35:27,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:35:27,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:35:27,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:35:27,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:35:27,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:35:27,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:35:27,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:35:27,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:35:27,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:35:27,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:35:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-14 17:35:27,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328754007] [2020-10-14 17:35:27,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:35:27,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 17:35:27,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752444977] [2020-10-14 17:35:27,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 17:35:27,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:35:27,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 17:35:27,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 17:35:27,936 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand 40 states. [2020-10-14 17:35:29,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:35:29,945 INFO L93 Difference]: Finished difference Result 384 states and 390 transitions. [2020-10-14 17:35:29,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 17:35:29,945 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 225 [2020-10-14 17:35:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:35:29,947 INFO L225 Difference]: With dead ends: 384 [2020-10-14 17:35:29,948 INFO L226 Difference]: Without dead ends: 235 [2020-10-14 17:35:29,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2115, Invalid=3737, Unknown=0, NotChecked=0, Total=5852 [2020-10-14 17:35:29,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-14 17:35:29,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2020-10-14 17:35:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-14 17:35:29,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2020-10-14 17:35:29,957 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 225 [2020-10-14 17:35:29,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:35:29,958 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2020-10-14 17:35:29,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 17:35:29,958 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2020-10-14 17:35:29,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-14 17:35:29,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:35:29,959 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:35:29,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 17:35:29,960 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:35:29,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:35:29,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1197376051, now seen corresponding path program 36 times [2020-10-14 17:35:29,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:35:29,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416973033] [2020-10-14 17:35:29,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:35:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:35:30,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:35:30,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:35:35,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:35:35,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-14 17:35:35,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:35:35,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-14 17:35:35,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:35:35,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:35:35,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 17:35:35,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 17:35:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-14 17:35:35,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:35:36,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:35:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:35:36,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:35:36,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:35:36,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:35:36,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:35:36,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:35:36,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:35:36,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:35:36,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:35:36,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:35:36,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:35:36,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:35:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2020-10-14 17:35:36,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416973033] [2020-10-14 17:35:36,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:35:36,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 17:35:36,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287134570] [2020-10-14 17:35:36,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 17:35:36,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:35:36,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 17:35:36,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 17:35:36,149 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand 41 states. [2020-10-14 17:35:38,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:35:38,323 INFO L93 Difference]: Finished difference Result 394 states and 400 transitions. [2020-10-14 17:35:38,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 17:35:38,324 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 231 [2020-10-14 17:35:38,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:35:38,326 INFO L225 Difference]: With dead ends: 394 [2020-10-14 17:35:38,326 INFO L226 Difference]: Without dead ends: 241 [2020-10-14 17:35:38,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2190, Invalid=3816, Unknown=0, NotChecked=0, Total=6006 [2020-10-14 17:35:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-14 17:35:38,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 238. [2020-10-14 17:35:38,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-14 17:35:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 240 transitions. [2020-10-14 17:35:38,335 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 240 transitions. Word has length 231 [2020-10-14 17:35:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:35:38,335 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 240 transitions. [2020-10-14 17:35:38,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 17:35:38,336 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 240 transitions. [2020-10-14 17:35:38,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-14 17:35:38,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:35:38,337 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:35:38,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 17:35:38,338 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:35:38,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:35:38,338 INFO L82 PathProgramCache]: Analyzing trace with hash -482492147, now seen corresponding path program 37 times [2020-10-14 17:35:38,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:35:38,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667944321] [2020-10-14 17:35:38,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:35:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:35:38,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:35:38,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking...