/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/loops-crafted-1/in-de32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:24:05,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:24:05,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:24:05,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:24:05,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:24:05,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:24:05,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:24:05,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:24:05,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:24:05,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:24:05,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:24:05,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:24:05,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:24:05,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:24:05,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:24:05,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:24:05,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:24:05,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:24:05,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:24:05,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:24:05,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:24:05,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:24:05,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:24:05,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:24:05,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:24:05,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:24:05,834 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:24:05,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:24:05,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:24:05,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:24:05,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:24:05,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:24:05,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:24:05,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:24:05,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:24:05,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:24:05,840 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:24:05,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:24:05,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:24:05,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:24:05,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:24:05,844 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 05:24:05,893 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:24:05,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:24:05,895 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:24:05,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:24:05,896 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:24:05,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:24:05,896 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:24:05,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:24:05,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:24:05,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:24:05,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:24:05,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:24:05,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:24:05,898 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:24:05,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:24:05,898 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:24:05,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:24:05,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:24:05,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:24:05,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:24:05,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:24:05,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:24:05,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:24:05,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:24:05,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:24:05,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:24:05,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:24:05,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:24:05,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:24:05,903 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:24:06,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:24:06,271 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:24:06,275 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:24:06,276 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:24:06,277 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:24:06,278 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de32.c [2020-10-14 05:24:06,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/860badef7/1ccf50cbab454300a28669d6e3887bc9/FLAGdfeae7408 [2020-10-14 05:24:06,827 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:24:06,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de32.c [2020-10-14 05:24:06,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/860badef7/1ccf50cbab454300a28669d6e3887bc9/FLAGdfeae7408 [2020-10-14 05:24:07,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/860badef7/1ccf50cbab454300a28669d6e3887bc9 [2020-10-14 05:24:07,182 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:24:07,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:24:07,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:24:07,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:24:07,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:24:07,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:24:07" (1/1) ... [2020-10-14 05:24:07,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f1c8c30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:07, skipping insertion in model container [2020-10-14 05:24:07,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:24:07" (1/1) ... [2020-10-14 05:24:07,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:24:07,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:24:07,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:24:07,420 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:24:07,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:24:07,450 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:24:07,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:07 WrapperNode [2020-10-14 05:24:07,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:24:07,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:24:07,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:24:07,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:24:07,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:07" (1/1) ... [2020-10-14 05:24:07,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:07" (1/1) ... [2020-10-14 05:24:07,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:07" (1/1) ... [2020-10-14 05:24:07,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:07" (1/1) ... [2020-10-14 05:24:07,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:07" (1/1) ... [2020-10-14 05:24:07,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:07" (1/1) ... [2020-10-14 05:24:07,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:07" (1/1) ... [2020-10-14 05:24:07,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:24:07,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:24:07,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:24:07,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:24:07,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:07" (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 05:24:07,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:24:07,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:24:07,638 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:24:07,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:24:07,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:24:07,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 05:24:07,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:24:07,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:24:07,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:24:07,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:24:07,844 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:24:07,845 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 05:24:07,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:24:07 BoogieIcfgContainer [2020-10-14 05:24:07,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:24:07,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:24:07,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:24:07,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:24:07,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:24:07" (1/3) ... [2020-10-14 05:24:07,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5639fdff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:24:07, skipping insertion in model container [2020-10-14 05:24:07,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:24:07" (2/3) ... [2020-10-14 05:24:07,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5639fdff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:24:07, skipping insertion in model container [2020-10-14 05:24:07,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:24:07" (3/3) ... [2020-10-14 05:24:07,858 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de32.c [2020-10-14 05:24:07,870 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:24:07,877 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:24:07,895 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:24:07,959 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:24:07,960 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:24:07,960 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:24:07,960 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:24:07,960 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:24:07,960 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:24:07,961 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:24:07,961 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:24:07,983 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-14 05:24:07,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 05:24:07,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:07,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:07,991 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:07,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:07,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1939139363, now seen corresponding path program 1 times [2020-10-14 05:24:08,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:08,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522945577] [2020-10-14 05:24:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:08,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:08,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:08,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 05:24:08,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:08,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-14 05:24:08,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:08,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:08,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:24:08,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:24:08,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:24:08,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:24:08,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:08,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:08,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:08,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:08,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:08,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:24:08,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:08,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:08,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:08,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:08,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:08,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:24:08,374 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 05:24:08,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522945577] [2020-10-14 05:24:08,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:08,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:24:08,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051282953] [2020-10-14 05:24:08,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:24:08,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:08,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:24:08,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:08,406 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-10-14 05:24:08,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:08,532 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2020-10-14 05:24:08,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:24:08,535 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-14 05:24:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:08,550 INFO L225 Difference]: With dead ends: 46 [2020-10-14 05:24:08,551 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:24:08,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:08,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:24:08,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-14 05:24:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 05:24:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-10-14 05:24:08,597 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2020-10-14 05:24:08,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:08,598 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-10-14 05:24:08,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:24:08,598 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-10-14 05:24:08,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:24:08,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:08,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:08,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:24:08,600 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:08,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:08,601 INFO L82 PathProgramCache]: Analyzing trace with hash 51759658, now seen corresponding path program 1 times [2020-10-14 05:24:08,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:08,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858253775] [2020-10-14 05:24:08,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:08,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:08,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:08,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:08,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:24:08,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:08,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-14 05:24:08,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:08,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:08,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:24:08,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:08,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:24:08,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 05:24:08,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:08,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:08,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:08,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:08,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:08,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 05:24:08,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:08,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:08,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:08,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:08,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:08,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:24:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:08,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858253775] [2020-10-14 05:24:08,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:08,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:24:08,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737266476] [2020-10-14 05:24:08,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:24:08,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:08,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:24:08,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:24:08,879 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2020-10-14 05:24:08,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:08,909 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2020-10-14 05:24:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:24:08,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-14 05:24:08,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:08,915 INFO L225 Difference]: With dead ends: 29 [2020-10-14 05:24:08,915 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:24:08,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:24:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:24:08,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-14 05:24:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 05:24:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-10-14 05:24:08,935 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2020-10-14 05:24:08,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:08,935 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-10-14 05:24:08,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:24:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-10-14 05:24:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:24:08,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:08,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:08,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:24:08,938 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:08,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1454588057, now seen corresponding path program 1 times [2020-10-14 05:24:08,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:08,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852201054] [2020-10-14 05:24:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:08,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:08,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:09,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:09,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:24:09,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:09,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-14 05:24:09,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:09,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:09,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:24:09,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:24:09,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:24:09,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:09,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:09,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:09,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:09,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:09,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:09,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:24:09,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:09,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:09,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:09,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:09,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:09,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:09,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852201054] [2020-10-14 05:24:09,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:09,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:24:09,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312480521] [2020-10-14 05:24:09,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:24:09,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:09,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:24:09,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:09,133 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 4 states. [2020-10-14 05:24:09,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:09,199 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-10-14 05:24:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:24:09,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 05:24:09,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:09,201 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:24:09,201 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 05:24:09,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 05:24:09,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-14 05:24:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 05:24:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-14 05:24:09,206 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2020-10-14 05:24:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:09,207 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-14 05:24:09,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:24:09,207 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-14 05:24:09,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:24:09,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:09,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:09,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:24:09,209 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:09,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1239468623, now seen corresponding path program 1 times [2020-10-14 05:24:09,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:09,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453565042] [2020-10-14 05:24:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:09,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:09,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:09,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:09,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:24:09,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:09,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-14 05:24:09,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:09,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:09,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:24:09,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:09,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:24:09,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:09,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:09,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:09,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:09,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:09,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:09,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:09,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:09,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:09,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:09,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:09,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:09,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:24:09,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453565042] [2020-10-14 05:24:09,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:09,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:24:09,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622714978] [2020-10-14 05:24:09,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:24:09,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:09,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:24:09,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:09,387 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-10-14 05:24:09,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:09,442 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-10-14 05:24:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:24:09,443 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-14 05:24:09,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:09,444 INFO L225 Difference]: With dead ends: 30 [2020-10-14 05:24:09,444 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 05:24:09,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 05:24:09,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-14 05:24:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:24:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-14 05:24:09,451 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-10-14 05:24:09,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:09,451 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-14 05:24:09,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:24:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-14 05:24:09,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:24:09,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:09,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:09,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:24:09,453 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash 342366825, now seen corresponding path program 1 times [2020-10-14 05:24:09,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:09,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152134950] [2020-10-14 05:24:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:09,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:09,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:09,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:24:09,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:09,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-14 05:24:09,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:09,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:09,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:24:09,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:24:09,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:24:09,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:09,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:09,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:09,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:09,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:09,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:09,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:09,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:09,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:09,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:09,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:09,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:09,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:24:09,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152134950] [2020-10-14 05:24:09,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:09,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:24:09,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376215170] [2020-10-14 05:24:09,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:24:09,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:09,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:24:09,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:09,673 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-10-14 05:24:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:09,742 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-14 05:24:09,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:24:09,743 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 05:24:09,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:09,746 INFO L225 Difference]: With dead ends: 35 [2020-10-14 05:24:09,746 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:24:09,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:24:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:24:09,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-14 05:24:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 05:24:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-14 05:24:09,764 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 16 [2020-10-14 05:24:09,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:09,765 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-14 05:24:09,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:24:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-14 05:24:09,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:24:09,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:09,766 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:09,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:24:09,767 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:09,767 INFO L82 PathProgramCache]: Analyzing trace with hash -596259126, now seen corresponding path program 2 times [2020-10-14 05:24:09,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:09,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972618840] [2020-10-14 05:24:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:09,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:09,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:09,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:10,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:10,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:24:10,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:10,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-14 05:24:10,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:10,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:10,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:24:10,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:24:10,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 05:24:10,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:10,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:10,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:10,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:10,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:10,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:10,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:10,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:10,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:10,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:10,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:10,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:10,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:24:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:24:10,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972618840] [2020-10-14 05:24:10,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:24:10,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:24:10,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121189098] [2020-10-14 05:24:10,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:24:10,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:10,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:24:10,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:24:10,077 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2020-10-14 05:24:10,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:10,132 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-10-14 05:24:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:24:10,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-14 05:24:10,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:10,135 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:24:10,135 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 05:24:10,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:24:10,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 05:24:10,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-14 05:24:10,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 05:24:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-14 05:24:10,153 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2020-10-14 05:24:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:10,154 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-14 05:24:10,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:24:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-14 05:24:10,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:24:10,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:10,157 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:10,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:24:10,157 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:10,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:10,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1697985137, now seen corresponding path program 2 times [2020-10-14 05:24:10,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:10,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780385460] [2020-10-14 05:24:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:10,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:10,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:10,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:10,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:24:10,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:10,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-14 05:24:10,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:10,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:10,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:24:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:24:10,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:10,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:10,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:10,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:10,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:10,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:10,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:10,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:10,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:10,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:10,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:10,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:10,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:24:10,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780385460] [2020-10-14 05:24:10,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:10,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:24:10,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755298369] [2020-10-14 05:24:10,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:24:10,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:10,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:24:10,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:10,495 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 6 states. [2020-10-14 05:24:10,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:10,557 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-10-14 05:24:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:24:10,558 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-14 05:24:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:10,558 INFO L225 Difference]: With dead ends: 31 [2020-10-14 05:24:10,559 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 05:24:10,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 05:24:10,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-14 05:24:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 05:24:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-14 05:24:10,565 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2020-10-14 05:24:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:10,565 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-14 05:24:10,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:24:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-14 05:24:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:24:10,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:10,566 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:10,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:24:10,567 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:10,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1138800679, now seen corresponding path program 3 times [2020-10-14 05:24:10,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:10,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304012996] [2020-10-14 05:24:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:10,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:10,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:10,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:10,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:24:10,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:10,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-14 05:24:10,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:10,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:10,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:24:10,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:10,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:24:10,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:10,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:10,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:10,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:10,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:10,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:10,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:10,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:10,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:10,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:10,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:10,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:10,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:24:10,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304012996] [2020-10-14 05:24:10,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:10,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:24:10,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123307339] [2020-10-14 05:24:10,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:24:10,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:10,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:24:10,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:24:10,899 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 7 states. [2020-10-14 05:24:10,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:10,995 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-10-14 05:24:10,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:24:10,996 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 05:24:10,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:10,997 INFO L225 Difference]: With dead ends: 37 [2020-10-14 05:24:10,997 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 05:24:10,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:24:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 05:24:11,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-14 05:24:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 05:24:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-14 05:24:11,004 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-10-14 05:24:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:11,005 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-14 05:24:11,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:24:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-14 05:24:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:24:11,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:11,006 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:11,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:24:11,007 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:11,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1409184419, now seen corresponding path program 4 times [2020-10-14 05:24:11,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:11,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837253551] [2020-10-14 05:24:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:11,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:11,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:11,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:24:11,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:11,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-14 05:24:11,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:11,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:11,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:24:11,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:24:11,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:24:11,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:11,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:11,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:11,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:11,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:11,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:11,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:11,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:11,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:11,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:11,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:11,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:11,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:24:11,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837253551] [2020-10-14 05:24:11,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:11,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:24:11,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172426810] [2020-10-14 05:24:11,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:24:11,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:11,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:24:11,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:24:11,221 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 7 states. [2020-10-14 05:24:11,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:11,297 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-10-14 05:24:11,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:24:11,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-14 05:24:11,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:11,298 INFO L225 Difference]: With dead ends: 43 [2020-10-14 05:24:11,298 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 05:24:11,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:11,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 05:24:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-14 05:24:11,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 05:24:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-14 05:24:11,306 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 19 [2020-10-14 05:24:11,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:11,306 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-14 05:24:11,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:24:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-14 05:24:11,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:24:11,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:11,308 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:11,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:24:11,308 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:11,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:11,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1485591170, now seen corresponding path program 5 times [2020-10-14 05:24:11,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:11,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002248798] [2020-10-14 05:24:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:11,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:11,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:11,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:11,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:11,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:24:11,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:11,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-14 05:24:11,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:11,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:11,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:24:11,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:11,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:24:11,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:11,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:11,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:11,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:11,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:11,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:11,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:11,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:11,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:11,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:11,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:11,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:11,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:24:11,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002248798] [2020-10-14 05:24:11,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:11,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:24:11,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082854604] [2020-10-14 05:24:11,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:24:11,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:11,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:24:11,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:24:11,860 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-10-14 05:24:11,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:11,928 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2020-10-14 05:24:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:24:11,929 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-14 05:24:11,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:11,930 INFO L225 Difference]: With dead ends: 63 [2020-10-14 05:24:11,930 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 05:24:11,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:24:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 05:24:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 37. [2020-10-14 05:24:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:24:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2020-10-14 05:24:11,939 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 19 [2020-10-14 05:24:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:11,939 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2020-10-14 05:24:11,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:24:11,940 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2020-10-14 05:24:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:24:11,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:11,941 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:11,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:24:11,941 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:11,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:11,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1201145767, now seen corresponding path program 6 times [2020-10-14 05:24:11,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:11,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056968209] [2020-10-14 05:24:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:11,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:12,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:12,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:12,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:24:12,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:12,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-14 05:24:12,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:12,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:12,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:24:12,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:12,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:24:12,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:12,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:12,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:12,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:12,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:12,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:12,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:12,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:12,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:12,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:12,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:12,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:12,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:24:12,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056968209] [2020-10-14 05:24:12,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:12,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:24:12,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622024474] [2020-10-14 05:24:12,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:24:12,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:12,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:24:12,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:12,502 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 8 states. [2020-10-14 05:24:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:12,593 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-10-14 05:24:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:24:12,594 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-14 05:24:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:12,594 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:24:12,594 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 05:24:12,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:24:12,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 05:24:12,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-14 05:24:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 05:24:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-14 05:24:12,600 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2020-10-14 05:24:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:12,601 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-14 05:24:12,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:24:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-14 05:24:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:24:12,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:12,602 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:12,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:24:12,602 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:12,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:12,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1226851753, now seen corresponding path program 7 times [2020-10-14 05:24:12,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:12,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777569322] [2020-10-14 05:24:12,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:12,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:12,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:12,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:12,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:24:12,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:12,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-14 05:24:12,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:12,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:12,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:24:12,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:12,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:24:12,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:12,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:12,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:12,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:12,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:12,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:12,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:12,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:12,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:12,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:12,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:12,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:12,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:24:12,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777569322] [2020-10-14 05:24:12,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:12,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:24:12,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616325898] [2020-10-14 05:24:12,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:24:12,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:12,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:24:12,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:12,994 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 8 states. [2020-10-14 05:24:13,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:13,099 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-10-14 05:24:13,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:24:13,100 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-14 05:24:13,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:13,101 INFO L225 Difference]: With dead ends: 43 [2020-10-14 05:24:13,101 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 05:24:13,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:24:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 05:24:13,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-14 05:24:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 05:24:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-14 05:24:13,107 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2020-10-14 05:24:13,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:13,108 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-14 05:24:13,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:24:13,108 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-14 05:24:13,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:24:13,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:13,109 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:13,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:24:13,110 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:13,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:13,110 INFO L82 PathProgramCache]: Analyzing trace with hash 648805497, now seen corresponding path program 8 times [2020-10-14 05:24:13,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:13,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043442379] [2020-10-14 05:24:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:13,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:13,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:13,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:13,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:13,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:24:13,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:13,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-14 05:24:13,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:13,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:13,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:24:13,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:24:13,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:24:13,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:13,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:13,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:13,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:13,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:13,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:13,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:13,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:13,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:13,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:13,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:13,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:13,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:24:13,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043442379] [2020-10-14 05:24:13,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:13,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:24:13,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083878756] [2020-10-14 05:24:13,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:24:13,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:13,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:24:13,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:13,772 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-10-14 05:24:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:13,822 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-10-14 05:24:13,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:24:13,823 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 05:24:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:13,824 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:24:13,824 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 05:24:13,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:13,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 05:24:13,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-14 05:24:13,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 05:24:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-14 05:24:13,831 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 20 [2020-10-14 05:24:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:13,832 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-14 05:24:13,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:24:13,832 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-14 05:24:13,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:24:13,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:13,833 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:13,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:24:13,834 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:13,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:13,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1186812906, now seen corresponding path program 9 times [2020-10-14 05:24:13,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:13,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805906268] [2020-10-14 05:24:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:13,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:13,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:13,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:14,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:14,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:24:14,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:14,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 571 [2020-10-14 05:24:14,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:14,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:14,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:24:14,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:14,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:24:14,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:14,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:14,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:14,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:14,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:14,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:14,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:14,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:14,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:14,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:14,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:14,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:14,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:24:14,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805906268] [2020-10-14 05:24:14,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:14,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:24:14,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993095554] [2020-10-14 05:24:14,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:24:14,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:14,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:24:14,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:14,508 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2020-10-14 05:24:14,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:14,590 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2020-10-14 05:24:14,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:24:14,590 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-14 05:24:14,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:14,591 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:24:14,592 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 05:24:14,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:14,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 05:24:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2020-10-14 05:24:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 05:24:14,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-10-14 05:24:14,599 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 20 [2020-10-14 05:24:14,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:14,599 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-10-14 05:24:14,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:24:14,599 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-10-14 05:24:14,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:24:14,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:14,600 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:14,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:24:14,600 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:14,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:14,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1042280975, now seen corresponding path program 10 times [2020-10-14 05:24:14,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:14,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28768668] [2020-10-14 05:24:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:14,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:14,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:15,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:15,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:24:15,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:15,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-14 05:24:15,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:15,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:15,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:24:15,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:15,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:24:15,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:15,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:15,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:15,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:15,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:15,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:15,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:15,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:15,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:15,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:15,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:15,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:15,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:24:15,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28768668] [2020-10-14 05:24:15,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:15,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:24:15,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454983104] [2020-10-14 05:24:15,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:24:15,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:15,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:24:15,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:24:15,228 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 9 states. [2020-10-14 05:24:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:15,363 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-14 05:24:15,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:24:15,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-14 05:24:15,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:15,364 INFO L225 Difference]: With dead ends: 53 [2020-10-14 05:24:15,364 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 05:24:15,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:24:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 05:24:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-10-14 05:24:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:24:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-14 05:24:15,372 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 21 [2020-10-14 05:24:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:15,373 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-14 05:24:15,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:24:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-14 05:24:15,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:24:15,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:15,375 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:15,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:24:15,375 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:15,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:15,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1366367153, now seen corresponding path program 11 times [2020-10-14 05:24:15,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:15,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026646259] [2020-10-14 05:24:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:15,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:15,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:15,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:15,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:15,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:24:15,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:15,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-14 05:24:15,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:15,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:15,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:24:15,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:24:15,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:24:15,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:16,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:16,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:16,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:16,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:16,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:16,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:16,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:16,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:16,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:16,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:24:16,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026646259] [2020-10-14 05:24:16,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:16,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:24:16,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766503629] [2020-10-14 05:24:16,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:24:16,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:16,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:24:16,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:24:16,068 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2020-10-14 05:24:16,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:16,217 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-10-14 05:24:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:24:16,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-14 05:24:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:16,219 INFO L225 Difference]: With dead ends: 48 [2020-10-14 05:24:16,219 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 05:24:16,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 05:24:16,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-10-14 05:24:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:24:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-14 05:24:16,230 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 21 [2020-10-14 05:24:16,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:16,232 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-14 05:24:16,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:24:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-14 05:24:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:24:16,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:16,234 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:16,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:24:16,234 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:16,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:16,235 INFO L82 PathProgramCache]: Analyzing trace with hash -384445847, now seen corresponding path program 12 times [2020-10-14 05:24:16,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:16,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607915263] [2020-10-14 05:24:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:16,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:16,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:16,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:24:16,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:16,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-14 05:24:16,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:16,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:16,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:24:16,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:24:16,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:24:16,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:16,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:16,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:16,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:16,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:16,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:16,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:16,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:16,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:16,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:16,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:16,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:16,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:24:16,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607915263] [2020-10-14 05:24:16,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:16,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:24:16,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979948392] [2020-10-14 05:24:16,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:24:16,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:16,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:24:16,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:16,509 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 8 states. [2020-10-14 05:24:16,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:16,602 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-10-14 05:24:16,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:24:16,602 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-14 05:24:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:16,603 INFO L225 Difference]: With dead ends: 66 [2020-10-14 05:24:16,603 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 05:24:16,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:24:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 05:24:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2020-10-14 05:24:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 05:24:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-10-14 05:24:16,618 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 22 [2020-10-14 05:24:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:16,618 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-10-14 05:24:16,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:24:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-10-14 05:24:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:24:16,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:16,621 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:16,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:24:16,622 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:16,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:16,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1663304369, now seen corresponding path program 13 times [2020-10-14 05:24:16,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:16,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137270942] [2020-10-14 05:24:16,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:16,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:16,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:17,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:17,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:24:17,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:17,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-14 05:24:17,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:17,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:17,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:24:17,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:17,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:24:17,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:17,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:17,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:17,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:17,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:17,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:17,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:17,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:17,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:17,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:17,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:17,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:17,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:24:17,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137270942] [2020-10-14 05:24:17,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:17,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:24:17,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548681438] [2020-10-14 05:24:17,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:24:17,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:17,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:24:17,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:24:17,430 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 10 states. [2020-10-14 05:24:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:17,616 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-14 05:24:17,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:24:17,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-14 05:24:17,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:17,619 INFO L225 Difference]: With dead ends: 53 [2020-10-14 05:24:17,620 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 05:24:17,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:24:17,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 05:24:17,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-14 05:24:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 05:24:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-14 05:24:17,637 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 23 [2020-10-14 05:24:17,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:17,638 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-14 05:24:17,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:24:17,638 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-14 05:24:17,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:24:17,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:17,639 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:17,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:24:17,643 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:17,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:17,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1101766237, now seen corresponding path program 14 times [2020-10-14 05:24:17,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:17,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082845514] [2020-10-14 05:24:17,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:17,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:17,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:18,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:18,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:24:18,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:18,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-14 05:24:18,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:18,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:18,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:24:18,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:18,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:24:18,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:18,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:18,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:18,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:18,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:18,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:18,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:18,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:18,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:18,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:18,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:18,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:18,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:24:18,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082845514] [2020-10-14 05:24:18,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:18,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:24:18,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690171370] [2020-10-14 05:24:18,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:24:18,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:18,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:24:18,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:24:18,264 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 10 states. [2020-10-14 05:24:18,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:18,438 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-14 05:24:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:24:18,439 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-14 05:24:18,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:18,440 INFO L225 Difference]: With dead ends: 50 [2020-10-14 05:24:18,440 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 05:24:18,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:24:18,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 05:24:18,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-14 05:24:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:24:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-14 05:24:18,447 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 23 [2020-10-14 05:24:18,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:18,447 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-14 05:24:18,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:24:18,447 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-14 05:24:18,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:24:18,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:18,449 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:18,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:24:18,449 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:18,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:18,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1976600209, now seen corresponding path program 15 times [2020-10-14 05:24:18,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:18,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072198212] [2020-10-14 05:24:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:18,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:18,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:18,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:19,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:19,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:24:19,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:19,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1157 [2020-10-14 05:24:19,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:19,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:24:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:24:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:24:19,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:19,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:19,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:19,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:19,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:19,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:19,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:19,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:19,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:19,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:19,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:19,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:19,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:24:19,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072198212] [2020-10-14 05:24:19,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:19,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:24:19,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6561898] [2020-10-14 05:24:19,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:24:19,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:19,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:24:19,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:19,719 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 8 states. [2020-10-14 05:24:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:19,858 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2020-10-14 05:24:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:24:19,859 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-14 05:24:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:19,860 INFO L225 Difference]: With dead ends: 47 [2020-10-14 05:24:19,860 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 05:24:19,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:24:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 05:24:19,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-14 05:24:19,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 05:24:19,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-14 05:24:19,869 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 23 [2020-10-14 05:24:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:19,870 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-14 05:24:19,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:24:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-14 05:24:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:24:19,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:19,873 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:19,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:24:19,873 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:19,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1816727582, now seen corresponding path program 16 times [2020-10-14 05:24:19,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:19,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245383660] [2020-10-14 05:24:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:19,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:19,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:19,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:20,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:20,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:24:20,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:20,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-10-14 05:24:20,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:20,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:24:20,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:20,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:24:20,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:20,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:20,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:20,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:20,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:20,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:20,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:20,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:20,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:20,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:20,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:20,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:20,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:24:20,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245383660] [2020-10-14 05:24:20,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:20,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:24:20,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506666713] [2020-10-14 05:24:20,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:24:20,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:20,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:24:20,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:24:20,851 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 9 states. [2020-10-14 05:24:20,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:20,953 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2020-10-14 05:24:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:24:20,953 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-14 05:24:20,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:20,954 INFO L225 Difference]: With dead ends: 71 [2020-10-14 05:24:20,954 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 05:24:20,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:24:20,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 05:24:20,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2020-10-14 05:24:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 05:24:20,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-14 05:24:20,964 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 23 [2020-10-14 05:24:20,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:20,965 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-14 05:24:20,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:24:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-14 05:24:20,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:24:20,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:20,966 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:20,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:24:20,966 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:20,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:20,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1208674407, now seen corresponding path program 17 times [2020-10-14 05:24:20,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:20,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188924979] [2020-10-14 05:24:20,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:20,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:21,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:21,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:21,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:24:21,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:21,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-14 05:24:21,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:21,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:21,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:24:21,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:21,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:24:21,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:21,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:21,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:21,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:21,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:21,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:21,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:21,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:21,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:21,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:21,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:21,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:21,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:24:21,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188924979] [2020-10-14 05:24:21,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:21,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:24:21,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903285223] [2020-10-14 05:24:21,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:24:21,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:21,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:24:21,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:24:21,975 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 11 states. [2020-10-14 05:24:22,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:22,165 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-14 05:24:22,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:24:22,166 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-14 05:24:22,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:22,166 INFO L225 Difference]: With dead ends: 62 [2020-10-14 05:24:22,167 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 05:24:22,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:24:22,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 05:24:22,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-10-14 05:24:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 05:24:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-10-14 05:24:22,174 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 24 [2020-10-14 05:24:22,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:22,175 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-10-14 05:24:22,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:24:22,175 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-10-14 05:24:22,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:24:22,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:22,175 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:22,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:24:22,176 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:22,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:22,176 INFO L82 PathProgramCache]: Analyzing trace with hash -394565223, now seen corresponding path program 18 times [2020-10-14 05:24:22,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:22,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373714882] [2020-10-14 05:24:22,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:22,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:22,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:22,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:23,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:23,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:24:23,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:23,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-10-14 05:24:23,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:23,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:23,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:24:23,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:24:23,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:24:23,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:23,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:23,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:23,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:23,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:23,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:23,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:23,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:23,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:23,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:23,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:23,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:23,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 05:24:23,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373714882] [2020-10-14 05:24:23,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:23,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:24:23,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127300946] [2020-10-14 05:24:23,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:24:23,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:23,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:24:23,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:24:23,406 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 8 states. [2020-10-14 05:24:23,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:23,624 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-14 05:24:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:24:23,624 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-14 05:24:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:23,625 INFO L225 Difference]: With dead ends: 56 [2020-10-14 05:24:23,625 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 05:24:23,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:24:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 05:24:23,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-10-14 05:24:23,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 05:24:23,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-14 05:24:23,637 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 24 [2020-10-14 05:24:23,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:23,637 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-14 05:24:23,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:24:23,638 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-14 05:24:23,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:24:23,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:23,638 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:23,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:24:23,639 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:23,639 INFO L82 PathProgramCache]: Analyzing trace with hash 182109661, now seen corresponding path program 19 times [2020-10-14 05:24:23,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:23,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434240472] [2020-10-14 05:24:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:23,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:23,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:23,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:24:23,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:23,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-14 05:24:23,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:23,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:23,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:24:23,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:24:23,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:24:23,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:23,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:23,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:23,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:23,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:23,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:23,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:23,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:23,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:23,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:23,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:23,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:23,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:24:23,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434240472] [2020-10-14 05:24:23,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:23,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:24:23,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757646750] [2020-10-14 05:24:23,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:24:23,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:23,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:24:23,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:24:23,970 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 9 states. [2020-10-14 05:24:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:24,093 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-10-14 05:24:24,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:24:24,094 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-14 05:24:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:24,094 INFO L225 Difference]: With dead ends: 77 [2020-10-14 05:24:24,095 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 05:24:24,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:24:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 05:24:24,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2020-10-14 05:24:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:24:24,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-14 05:24:24,109 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 25 [2020-10-14 05:24:24,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:24,109 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-14 05:24:24,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:24:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-14 05:24:24,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:24:24,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:24,110 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:24,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:24:24,110 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:24,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:24,111 INFO L82 PathProgramCache]: Analyzing trace with hash 346742809, now seen corresponding path program 20 times [2020-10-14 05:24:24,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:24,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577976984] [2020-10-14 05:24:24,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:24,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:24,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:25,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:25,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:24:25,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:25,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1302 [2020-10-14 05:24:25,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:25,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:25,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:24:25,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:24:25,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:24:25,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:25,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:25,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:25,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:25,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:25,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:25,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:25,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:25,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:25,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:25,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:25,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:25,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:24:25,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577976984] [2020-10-14 05:24:25,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:25,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:24:25,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282573289] [2020-10-14 05:24:25,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:24:25,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:25,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:24:25,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:24:25,586 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 12 states. [2020-10-14 05:24:26,582 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-10-14 05:24:29,571 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~z~0 2))) (and (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 4)) 4294967296)) 4294967298)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 2)) 4294967296)) 4294967296)) (<= c_main_~y~0 .cse0) (<= .cse0 c_main_~y~0) (<= (+ (* 4294967296 (div c_main_~y~0 4294967296)) 1) c_main_~y~0))) is different from false [2020-10-14 05:24:29,960 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-10-14 05:24:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:30,227 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-14 05:24:30,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:24:30,227 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-14 05:24:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:30,228 INFO L225 Difference]: With dead ends: 78 [2020-10-14 05:24:30,228 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 05:24:30,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=120, Invalid=483, Unknown=1, NotChecked=46, Total=650 [2020-10-14 05:24:30,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 05:24:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2020-10-14 05:24:30,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:24:30,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-14 05:24:30,233 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2020-10-14 05:24:30,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:30,233 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-14 05:24:30,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:24:30,234 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-14 05:24:30,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:24:30,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:30,234 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:30,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:24:30,234 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:30,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:30,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2117204567, now seen corresponding path program 21 times [2020-10-14 05:24:30,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:30,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429037862] [2020-10-14 05:24:30,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:30,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:30,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:31,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:31,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:24:31,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:31,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1029 [2020-10-14 05:24:31,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:31,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:31,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:24:31,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:31,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:24:31,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:31,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:31,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:31,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:31,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:31,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:31,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:31,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:31,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:31,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:31,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:31,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:31,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:24:31,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429037862] [2020-10-14 05:24:31,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:31,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:24:31,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726500510] [2020-10-14 05:24:31,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:24:31,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:31,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:24:31,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:24:31,458 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-10-14 05:24:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:31,717 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-14 05:24:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:24:31,718 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-14 05:24:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:31,719 INFO L225 Difference]: With dead ends: 52 [2020-10-14 05:24:31,719 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:24:31,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:24:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:24:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-14 05:24:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 05:24:31,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-14 05:24:31,726 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 26 [2020-10-14 05:24:31,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:31,726 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-14 05:24:31,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:24:31,727 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-14 05:24:31,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:24:31,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:31,727 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:31,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:24:31,728 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:31,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:31,728 INFO L82 PathProgramCache]: Analyzing trace with hash 970402255, now seen corresponding path program 22 times [2020-10-14 05:24:31,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:31,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059988281] [2020-10-14 05:24:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:31,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:31,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:32,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:32,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:24:32,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:32,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1077 [2020-10-14 05:24:32,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:32,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:32,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:24:32,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:32,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:24:32,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:32,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:32,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:32,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:32,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:32,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:32,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:32,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:32,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:32,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:32,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:32,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:32,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:24:32,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059988281] [2020-10-14 05:24:32,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:32,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:24:32,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794889871] [2020-10-14 05:24:32,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:24:32,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:32,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:24:32,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:24:32,992 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 13 states. [2020-10-14 05:24:33,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:33,201 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-14 05:24:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:24:33,202 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-14 05:24:33,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:33,203 INFO L225 Difference]: With dead ends: 53 [2020-10-14 05:24:33,203 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 05:24:33,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:24:33,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 05:24:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-14 05:24:33,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:24:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-14 05:24:33,214 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 27 [2020-10-14 05:24:33,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:33,216 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-14 05:24:33,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:24:33,216 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-14 05:24:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:24:33,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:33,216 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:33,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:24:33,216 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:33,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1762195022, now seen corresponding path program 23 times [2020-10-14 05:24:33,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:33,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321469140] [2020-10-14 05:24:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:33,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:33,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:33,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:35,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:35,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:24:35,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:35,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2109 [2020-10-14 05:24:35,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:35,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:35,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:24:35,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:35,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:24:35,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:35,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:35,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:35,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:35,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:35,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:35,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:35,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:35,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:35,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:35,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:35,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:35,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:24:35,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321469140] [2020-10-14 05:24:35,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:35,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:24:35,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229874034] [2020-10-14 05:24:35,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:24:35,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:35,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:24:35,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:24:35,528 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-10-14 05:24:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:35,914 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2020-10-14 05:24:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:24:35,915 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-14 05:24:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:35,916 INFO L225 Difference]: With dead ends: 67 [2020-10-14 05:24:35,916 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 05:24:35,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:24:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 05:24:35,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-10-14 05:24:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 05:24:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-14 05:24:35,939 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 27 [2020-10-14 05:24:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:35,939 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-14 05:24:35,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:24:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-14 05:24:35,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:24:35,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:35,942 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:35,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:24:35,943 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:35,943 INFO L82 PathProgramCache]: Analyzing trace with hash -2098034071, now seen corresponding path program 24 times [2020-10-14 05:24:35,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:35,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042266408] [2020-10-14 05:24:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:35,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:36,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:36,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:24:36,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:36,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-14 05:24:36,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:36,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:36,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:24:36,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:24:36,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:24:36,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:36,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:36,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:36,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:36,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:36,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:36,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:36,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:36,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:36,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:36,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:36,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:36,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:24:36,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042266408] [2020-10-14 05:24:36,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:36,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:24:36,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450171650] [2020-10-14 05:24:36,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:24:36,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:36,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:24:36,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:24:36,363 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 10 states. [2020-10-14 05:24:36,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:36,508 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2020-10-14 05:24:36,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:24:36,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 05:24:36,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:36,510 INFO L225 Difference]: With dead ends: 92 [2020-10-14 05:24:36,510 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 05:24:36,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:24:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 05:24:36,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2020-10-14 05:24:36,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 05:24:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-10-14 05:24:36,522 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 28 [2020-10-14 05:24:36,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:36,522 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-10-14 05:24:36,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:24:36,522 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-10-14 05:24:36,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:24:36,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:36,523 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:36,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:24:36,523 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:36,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1764497993, now seen corresponding path program 25 times [2020-10-14 05:24:36,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:36,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537795370] [2020-10-14 05:24:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:36,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:36,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:36,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:38,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:24:38,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:38,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1776 [2020-10-14 05:24:38,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:38,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:38,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:24:38,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 05:24:38,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:24:38,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:38,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:38,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:38,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:38,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:38,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:38,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:38,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:38,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:38,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:38,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:38,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-14 05:24:38,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537795370] [2020-10-14 05:24:38,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:38,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:24:38,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813908035] [2020-10-14 05:24:38,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:24:38,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:38,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:24:38,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:24:38,431 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 10 states. [2020-10-14 05:24:38,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:38,651 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-10-14 05:24:38,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:24:38,652 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 05:24:38,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:38,653 INFO L225 Difference]: With dead ends: 65 [2020-10-14 05:24:38,653 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 05:24:38,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:24:38,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 05:24:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-14 05:24:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 05:24:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-14 05:24:38,665 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 28 [2020-10-14 05:24:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:38,665 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-14 05:24:38,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:24:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-14 05:24:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 05:24:38,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:38,666 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:38,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:24:38,666 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:38,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1564687631, now seen corresponding path program 26 times [2020-10-14 05:24:38,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:38,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650713895] [2020-10-14 05:24:38,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:38,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:39,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 05:24:39,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:39,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1130 [2020-10-14 05:24:39,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:39,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:39,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:24:39,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:39,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:24:39,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:39,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:39,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:39,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:39,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:39,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:39,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:39,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:39,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:39,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:39,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:39,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:24:40,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650713895] [2020-10-14 05:24:40,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:40,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:24:40,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024757363] [2020-10-14 05:24:40,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:24:40,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:40,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:24:40,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:24:40,002 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 14 states. [2020-10-14 05:24:40,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:40,266 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2020-10-14 05:24:40,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:24:40,266 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-14 05:24:40,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:40,267 INFO L225 Difference]: With dead ends: 65 [2020-10-14 05:24:40,267 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 05:24:40,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:24:40,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 05:24:40,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-14 05:24:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 05:24:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-14 05:24:40,276 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 29 [2020-10-14 05:24:40,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:40,276 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-14 05:24:40,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:24:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-14 05:24:40,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 05:24:40,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:40,277 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:40,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:24:40,277 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:40,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:40,278 INFO L82 PathProgramCache]: Analyzing trace with hash 124628701, now seen corresponding path program 27 times [2020-10-14 05:24:40,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:40,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474588118] [2020-10-14 05:24:40,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:40,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:40,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:41,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:41,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 05:24:41,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:41,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1268 [2020-10-14 05:24:41,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:41,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:41,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:24:41,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:41,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:24:41,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:41,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:41,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:41,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:41,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:41,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:41,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:41,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:41,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:41,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:41,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:41,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:41,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 05:24:41,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474588118] [2020-10-14 05:24:41,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:41,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:24:41,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045649967] [2020-10-14 05:24:41,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:24:41,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:41,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:24:41,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:24:41,744 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 14 states. [2020-10-14 05:24:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:42,069 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-14 05:24:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:24:42,070 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-14 05:24:42,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:42,071 INFO L225 Difference]: With dead ends: 60 [2020-10-14 05:24:42,071 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 05:24:42,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:24:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 05:24:42,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-14 05:24:42,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 05:24:42,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-14 05:24:42,087 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 29 [2020-10-14 05:24:42,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:42,087 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-14 05:24:42,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:24:42,088 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-14 05:24:42,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 05:24:42,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:42,088 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:42,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:24:42,089 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:42,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:42,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097327, now seen corresponding path program 28 times [2020-10-14 05:24:42,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:42,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959716864] [2020-10-14 05:24:42,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:42,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:42,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:42,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:43,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:43,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 05:24:43,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:43,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1759 [2020-10-14 05:24:43,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:43,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:43,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:24:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:24:43,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:44,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:44,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:44,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:44,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:44,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:44,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:44,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:44,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:44,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:44,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:44,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:44,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:24:44,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959716864] [2020-10-14 05:24:44,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:44,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:24:44,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434967486] [2020-10-14 05:24:44,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:24:44,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:44,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:24:44,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:24:44,016 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 11 states. [2020-10-14 05:24:44,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:44,194 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2020-10-14 05:24:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:24:44,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-14 05:24:44,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:44,195 INFO L225 Difference]: With dead ends: 88 [2020-10-14 05:24:44,195 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 05:24:44,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:24:44,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 05:24:44,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-10-14 05:24:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:24:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-14 05:24:44,204 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 29 [2020-10-14 05:24:44,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:44,204 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-14 05:24:44,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:24:44,204 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-14 05:24:44,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:24:44,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:44,205 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:44,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:24:44,205 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:44,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:44,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1634146137, now seen corresponding path program 29 times [2020-10-14 05:24:44,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:44,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608195561] [2020-10-14 05:24:44,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:44,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:44,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:45,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:45,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:24:45,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:45,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1392 [2020-10-14 05:24:45,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:45,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:45,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:24:45,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:45,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:24:45,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:45,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:45,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:45,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:45,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:45,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:45,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:45,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:45,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:45,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:45,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:45,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:45,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 05:24:45,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608195561] [2020-10-14 05:24:45,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:45,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:24:45,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207450220] [2020-10-14 05:24:45,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:24:45,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:45,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:24:45,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:24:45,839 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 15 states. [2020-10-14 05:24:46,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:46,200 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2020-10-14 05:24:46,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:24:46,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-14 05:24:46,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:46,206 INFO L225 Difference]: With dead ends: 76 [2020-10-14 05:24:46,206 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 05:24:46,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:24:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 05:24:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2020-10-14 05:24:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 05:24:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-14 05:24:46,222 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 30 [2020-10-14 05:24:46,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:46,222 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-14 05:24:46,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:24:46,223 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-14 05:24:46,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:24:46,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:46,223 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:46,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:24:46,224 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:46,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:46,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1037714838, now seen corresponding path program 30 times [2020-10-14 05:24:46,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:46,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625312763] [2020-10-14 05:24:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:46,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:46,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:46,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:48,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:48,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:24:48,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:48,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2114 [2020-10-14 05:24:48,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:48,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:48,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:24:48,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:48,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:24:48,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:48,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:48,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:48,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:48,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:48,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:48,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:48,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:48,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:48,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:24:48,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625312763] [2020-10-14 05:24:48,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:48,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:24:48,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025321236] [2020-10-14 05:24:48,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:24:48,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:48,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:24:48,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:24:48,527 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 12 states. [2020-10-14 05:24:48,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:48,708 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-10-14 05:24:48,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:24:48,709 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 05:24:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:48,710 INFO L225 Difference]: With dead ends: 98 [2020-10-14 05:24:48,710 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 05:24:48,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:24:48,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 05:24:48,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2020-10-14 05:24:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 05:24:48,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-14 05:24:48,720 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 30 [2020-10-14 05:24:48,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:48,721 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-14 05:24:48,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:24:48,721 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-14 05:24:48,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:24:48,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:48,722 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:48,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:24:48,722 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:48,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:48,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1184546397, now seen corresponding path program 31 times [2020-10-14 05:24:48,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:48,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349155164] [2020-10-14 05:24:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:48,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:49,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:49,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:24:49,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:49,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-14 05:24:49,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:49,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:49,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:24:49,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:24:49,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:24:49,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:49,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:49,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:49,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:49,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:49,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:49,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:49,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:49,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:49,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:49,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:49,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:49,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 05:24:49,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349155164] [2020-10-14 05:24:49,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:49,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:24:49,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88035344] [2020-10-14 05:24:49,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:24:49,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:49,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:24:49,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:24:49,265 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 11 states. [2020-10-14 05:24:49,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:49,445 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2020-10-14 05:24:49,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:24:49,445 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-14 05:24:49,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:49,446 INFO L225 Difference]: With dead ends: 122 [2020-10-14 05:24:49,447 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 05:24:49,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:24:49,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 05:24:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 72. [2020-10-14 05:24:49,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 05:24:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-10-14 05:24:49,459 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 31 [2020-10-14 05:24:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:49,460 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-10-14 05:24:49,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:24:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-10-14 05:24:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:24:49,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:49,461 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:49,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:24:49,461 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:49,461 INFO L82 PathProgramCache]: Analyzing trace with hash -507607473, now seen corresponding path program 32 times [2020-10-14 05:24:49,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:49,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925481582] [2020-10-14 05:24:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:49,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:49,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:50,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:50,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:24:50,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:50,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1037 [2020-10-14 05:24:50,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:50,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:50,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:24:50,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:50,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:24:50,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:50,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:50,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:50,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:50,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:50,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:50,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:50,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:50,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:50,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:50,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:50,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:50,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-14 05:24:50,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925481582] [2020-10-14 05:24:50,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:50,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:24:50,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677884584] [2020-10-14 05:24:50,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:24:50,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:50,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:24:50,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:24:50,727 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 15 states. [2020-10-14 05:24:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:51,162 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2020-10-14 05:24:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:24:51,163 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-14 05:24:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:51,164 INFO L225 Difference]: With dead ends: 95 [2020-10-14 05:24:51,164 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 05:24:51,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:24:51,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 05:24:51,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2020-10-14 05:24:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 05:24:51,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-10-14 05:24:51,182 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 31 [2020-10-14 05:24:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:51,182 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-10-14 05:24:51,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:24:51,182 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-10-14 05:24:51,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:24:51,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:51,183 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:51,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:24:51,183 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:51,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:51,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1149382513, now seen corresponding path program 33 times [2020-10-14 05:24:51,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:51,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967988043] [2020-10-14 05:24:51,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:51,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:51,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:51,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:53,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:53,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:24:53,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:24:53,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2499 [2020-10-14 05:24:53,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:53,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:53,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:24:53,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:24:53,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:24:53,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:53,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:53,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:53,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:53,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:53,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:53,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:53,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:53,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:53,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:53,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:53,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:53,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 05:24:53,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967988043] [2020-10-14 05:24:53,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:53,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:24:53,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013506981] [2020-10-14 05:24:53,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:24:53,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:53,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:24:53,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:24:53,945 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 12 states. [2020-10-14 05:24:54,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:54,297 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2020-10-14 05:24:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:24:54,298 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-14 05:24:54,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:54,299 INFO L225 Difference]: With dead ends: 94 [2020-10-14 05:24:54,299 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 05:24:54,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:24:54,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 05:24:54,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-14 05:24:54,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 05:24:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2020-10-14 05:24:54,312 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 31 [2020-10-14 05:24:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:54,312 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2020-10-14 05:24:54,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:24:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2020-10-14 05:24:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:24:54,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:54,313 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:54,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:24:54,313 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:54,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:54,313 INFO L82 PathProgramCache]: Analyzing trace with hash 131856345, now seen corresponding path program 34 times [2020-10-14 05:24:54,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:54,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902579092] [2020-10-14 05:24:54,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:54,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:54,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:56,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:24:56,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:56,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1702 [2020-10-14 05:24:56,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:56,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:56,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:24:56,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:56,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:24:56,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:56,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:56,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:56,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:56,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:56,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:56,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:56,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:56,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:56,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:56,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:56,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 05:24:56,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902579092] [2020-10-14 05:24:56,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:56,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:24:56,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989712672] [2020-10-14 05:24:56,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:24:56,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:56,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:24:56,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:24:56,266 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand 16 states. [2020-10-14 05:24:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:56,605 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2020-10-14 05:24:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:24:56,606 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-10-14 05:24:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:56,607 INFO L225 Difference]: With dead ends: 86 [2020-10-14 05:24:56,607 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 05:24:56,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:24:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 05:24:56,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-14 05:24:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:24:56,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2020-10-14 05:24:56,617 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 32 [2020-10-14 05:24:56,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:56,617 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2020-10-14 05:24:56,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:24:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2020-10-14 05:24:56,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:24:56,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:56,618 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:56,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:24:56,618 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:56,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:56,619 INFO L82 PathProgramCache]: Analyzing trace with hash -12270167, now seen corresponding path program 35 times [2020-10-14 05:24:56,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:56,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118502018] [2020-10-14 05:24:56,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:56,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:56,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:58,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:24:58,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:58,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1519 [2020-10-14 05:24:58,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:58,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:58,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:24:58,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:58,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:24:58,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:58,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:58,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:58,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:58,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:58,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:58,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:58,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:58,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:58,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:58,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:58,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-14 05:24:58,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118502018] [2020-10-14 05:24:58,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:58,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:24:58,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231100505] [2020-10-14 05:24:58,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:24:58,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:58,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:24:58,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:24:58,392 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand 16 states. [2020-10-14 05:24:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:58,777 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2020-10-14 05:24:58,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:24:58,777 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-10-14 05:24:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:58,779 INFO L225 Difference]: With dead ends: 88 [2020-10-14 05:24:58,780 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 05:24:58,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:24:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 05:24:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2020-10-14 05:24:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 05:24:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2020-10-14 05:24:58,794 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 32 [2020-10-14 05:24:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:58,795 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2020-10-14 05:24:58,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:24:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2020-10-14 05:24:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:24:58,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:58,796 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:58,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:24:58,796 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:58,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:58,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1836682865, now seen corresponding path program 36 times [2020-10-14 05:24:58,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:58,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947343473] [2020-10-14 05:24:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:58,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:58,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:01,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:01,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:25:01,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:01,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2435 [2020-10-14 05:25:01,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:01,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:01,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:25:01,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:01,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:25:01,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:01,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:01,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:01,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:01,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:01,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:01,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:01,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:01,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:01,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:01,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:01,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:01,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-14 05:25:01,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947343473] [2020-10-14 05:25:01,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:01,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:25:01,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718380612] [2020-10-14 05:25:01,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:25:01,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:01,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:25:01,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:25:01,527 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 17 states. [2020-10-14 05:25:01,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:01,988 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2020-10-14 05:25:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:25:01,988 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-14 05:25:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:01,990 INFO L225 Difference]: With dead ends: 89 [2020-10-14 05:25:01,990 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 05:25:01,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:25:01,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 05:25:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2020-10-14 05:25:02,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 05:25:02,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2020-10-14 05:25:02,002 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 33 [2020-10-14 05:25:02,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:02,002 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2020-10-14 05:25:02,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:25:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2020-10-14 05:25:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:25:02,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:02,003 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:02,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:25:02,004 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:02,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1877672738, now seen corresponding path program 37 times [2020-10-14 05:25:02,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:02,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129199589] [2020-10-14 05:25:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:02,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:02,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:05,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:05,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:25:05,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:05,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3761 [2020-10-14 05:25:05,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:05,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:05,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:25:05,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:05,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:25:05,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:05,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:05,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:05,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:05,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:05,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:05,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:05,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:05,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:05,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:05,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:05,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:05,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:25:06,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129199589] [2020-10-14 05:25:06,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:06,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:25:06,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832718228] [2020-10-14 05:25:06,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:25:06,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:06,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:25:06,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:25:06,005 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 13 states. [2020-10-14 05:25:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:06,314 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2020-10-14 05:25:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:25:06,315 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-14 05:25:06,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:06,316 INFO L225 Difference]: With dead ends: 120 [2020-10-14 05:25:06,317 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 05:25:06,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:25:06,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 05:25:06,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-14 05:25:06,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 05:25:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-10-14 05:25:06,333 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 33 [2020-10-14 05:25:06,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:06,333 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-10-14 05:25:06,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:25:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-10-14 05:25:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:25:06,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:06,334 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:06,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:25:06,334 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:06,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1736065641, now seen corresponding path program 38 times [2020-10-14 05:25:06,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:06,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316097904] [2020-10-14 05:25:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:06,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:07,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:25:07,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:07,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-10-14 05:25:07,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:07,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:07,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:25:07,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:25:07,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:25:07,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:07,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:07,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:07,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:07,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:07,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:25:07,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:07,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:07,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:07,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:07,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:07,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-14 05:25:07,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316097904] [2020-10-14 05:25:07,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:07,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:25:07,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785390418] [2020-10-14 05:25:07,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:25:07,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:07,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:25:07,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:25:07,251 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 12 states. [2020-10-14 05:25:07,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:07,516 INFO L93 Difference]: Finished difference Result 141 states and 162 transitions. [2020-10-14 05:25:07,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:25:07,516 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-14 05:25:07,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:07,517 INFO L225 Difference]: With dead ends: 141 [2020-10-14 05:25:07,517 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 05:25:07,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:25:07,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 05:25:07,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 84. [2020-10-14 05:25:07,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 05:25:07,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2020-10-14 05:25:07,537 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 34 [2020-10-14 05:25:07,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:07,537 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2020-10-14 05:25:07,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:25:07,538 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2020-10-14 05:25:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:25:07,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:07,538 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:07,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:25:07,539 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:07,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:07,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1563111065, now seen corresponding path program 39 times [2020-10-14 05:25:07,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:07,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025550905] [2020-10-14 05:25:07,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:07,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:07,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:09,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:09,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:25:09,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:09,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1756 [2020-10-14 05:25:09,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:09,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:09,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:25:09,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:09,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:25:09,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:09,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:09,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:09,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:09,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:09,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:09,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:09,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:09,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:09,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:09,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:25:09,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025550905] [2020-10-14 05:25:09,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:09,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:25:09,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460187315] [2020-10-14 05:25:09,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:25:09,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:09,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:25:09,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:25:09,649 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand 17 states. [2020-10-14 05:25:10,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:10,546 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2020-10-14 05:25:10,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:25:10,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-14 05:25:10,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:10,548 INFO L225 Difference]: With dead ends: 109 [2020-10-14 05:25:10,548 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 05:25:10,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:25:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 05:25:10,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2020-10-14 05:25:10,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 05:25:10,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2020-10-14 05:25:10,587 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 34 [2020-10-14 05:25:10,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:10,587 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2020-10-14 05:25:10,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:25:10,588 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2020-10-14 05:25:10,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:25:10,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:10,589 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:10,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:25:10,590 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:10,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:10,590 INFO L82 PathProgramCache]: Analyzing trace with hash 30275737, now seen corresponding path program 40 times [2020-10-14 05:25:10,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:10,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604384096] [2020-10-14 05:25:10,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:10,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:10,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:11,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:14,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:25:14,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:14,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4060 [2020-10-14 05:25:14,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:14,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:14,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:25:14,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:14,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:25:14,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:14,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:14,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:14,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:14,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:14,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:14,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:14,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:14,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:14,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:14,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:14,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:14,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:25:14,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604384096] [2020-10-14 05:25:14,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:14,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:25:14,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587030587] [2020-10-14 05:25:14,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:25:14,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:14,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:25:14,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:25:14,870 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 14 states. [2020-10-14 05:25:15,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:15,163 INFO L93 Difference]: Finished difference Result 150 states and 182 transitions. [2020-10-14 05:25:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:25:15,164 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-14 05:25:15,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:15,165 INFO L225 Difference]: With dead ends: 150 [2020-10-14 05:25:15,165 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 05:25:15,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:25:15,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 05:25:15,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 94. [2020-10-14 05:25:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 05:25:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2020-10-14 05:25:15,199 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 34 [2020-10-14 05:25:15,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:15,200 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2020-10-14 05:25:15,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:25:15,200 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2020-10-14 05:25:15,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:25:15,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:15,207 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:15,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:25:15,207 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:15,208 INFO L82 PathProgramCache]: Analyzing trace with hash 822119631, now seen corresponding path program 41 times [2020-10-14 05:25:15,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:15,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90959821] [2020-10-14 05:25:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:15,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:15,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:18,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 05:25:18,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:18,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2990 [2020-10-14 05:25:18,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:18,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:18,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:25:18,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 05:25:18,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:25:18,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:18,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:18,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:18,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:18,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:18,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:18,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:18,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:18,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:18,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:18,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:18,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:18,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-14 05:25:18,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90959821] [2020-10-14 05:25:18,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:18,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:25:18,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097537100] [2020-10-14 05:25:18,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:25:18,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:18,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:25:18,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:25:18,637 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand 18 states. [2020-10-14 05:25:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:26,143 INFO L93 Difference]: Finished difference Result 174 states and 199 transitions. [2020-10-14 05:25:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:25:26,144 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-10-14 05:25:26,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:26,145 INFO L225 Difference]: With dead ends: 174 [2020-10-14 05:25:26,146 INFO L226 Difference]: Without dead ends: 151 [2020-10-14 05:25:26,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=124, Invalid=475, Unknown=1, NotChecked=0, Total=600 [2020-10-14 05:25:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-14 05:25:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 73. [2020-10-14 05:25:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 05:25:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-10-14 05:25:26,158 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 35 [2020-10-14 05:25:26,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:26,159 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-10-14 05:25:26,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:25:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-10-14 05:25:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:25:26,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:26,159 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:26,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:25:26,160 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2050195619, now seen corresponding path program 42 times [2020-10-14 05:25:26,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:26,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387364941] [2020-10-14 05:25:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:26,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:26,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:28,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:28,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 05:25:28,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:28,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2769 [2020-10-14 05:25:28,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:28,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:28,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:25:28,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:28,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:25:28,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:29,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:29,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:29,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:29,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:29,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:29,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:29,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:29,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:29,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:29,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:29,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:29,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:25:29,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387364941] [2020-10-14 05:25:29,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:29,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:25:29,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453773905] [2020-10-14 05:25:29,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:25:29,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:29,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:25:29,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:25:29,290 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 18 states. [2020-10-14 05:25:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:29,791 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2020-10-14 05:25:29,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:25:29,792 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-10-14 05:25:29,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:29,793 INFO L225 Difference]: With dead ends: 98 [2020-10-14 05:25:29,793 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 05:25:29,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:25:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 05:25:29,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2020-10-14 05:25:29,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 05:25:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-10-14 05:25:29,813 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 35 [2020-10-14 05:25:29,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:29,816 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-10-14 05:25:29,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:25:29,817 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-10-14 05:25:29,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:25:29,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:29,823 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:29,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:25:29,824 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:29,824 INFO L82 PathProgramCache]: Analyzing trace with hash -952863682, now seen corresponding path program 43 times [2020-10-14 05:25:29,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:29,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145608863] [2020-10-14 05:25:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:29,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:29,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:31,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:34,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:34,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 05:25:34,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:34,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4658 [2020-10-14 05:25:34,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:34,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:34,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:25:34,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 05:25:34,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:25:34,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:34,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:34,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:34,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:34,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:34,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:34,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:34,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:34,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:34,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:34,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:34,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:34,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-14 05:25:34,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145608863] [2020-10-14 05:25:34,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:34,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:25:34,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697316906] [2020-10-14 05:25:34,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:25:34,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:34,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:25:34,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:25:34,726 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 14 states. [2020-10-14 05:25:35,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:35,115 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-10-14 05:25:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:25:35,115 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-14 05:25:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:35,116 INFO L225 Difference]: With dead ends: 105 [2020-10-14 05:25:35,116 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 05:25:35,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:25:35,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 05:25:35,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-14 05:25:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 05:25:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-10-14 05:25:35,132 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 35 [2020-10-14 05:25:35,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:35,132 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-10-14 05:25:35,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:25:35,132 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-10-14 05:25:35,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:25:35,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:35,133 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:35,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:25:35,133 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:35,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1901414169, now seen corresponding path program 44 times [2020-10-14 05:25:35,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:35,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102298990] [2020-10-14 05:25:35,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:35,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:35,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:38,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:38,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:25:38,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:38,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3062 [2020-10-14 05:25:38,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:38,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:38,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:25:38,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:38,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:25:38,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:38,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:38,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:38,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:38,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:38,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:38,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:38,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:38,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:38,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:38,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:38,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:38,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:25:38,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102298990] [2020-10-14 05:25:38,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:38,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:25:38,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363620074] [2020-10-14 05:25:38,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:25:38,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:38,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:25:38,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:25:38,540 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 19 states. [2020-10-14 05:25:39,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:39,075 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2020-10-14 05:25:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:25:39,076 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-10-14 05:25:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:39,077 INFO L225 Difference]: With dead ends: 101 [2020-10-14 05:25:39,077 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 05:25:39,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:25:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 05:25:39,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2020-10-14 05:25:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 05:25:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-10-14 05:25:39,092 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 36 [2020-10-14 05:25:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:39,093 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-10-14 05:25:39,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:25:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-10-14 05:25:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 05:25:39,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:39,094 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:39,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:25:39,094 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:39,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:39,094 INFO L82 PathProgramCache]: Analyzing trace with hash -152733987, now seen corresponding path program 45 times [2020-10-14 05:25:39,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:39,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948527314] [2020-10-14 05:25:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:39,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:39,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:39,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:25:39,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:39,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-14 05:25:39,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:39,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:39,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:25:39,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 05:25:39,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:25:39,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:39,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:39,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:39,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:39,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:39,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:39,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:39,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:39,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:39,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:39,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:39,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:39,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:25:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:25:39,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948527314] [2020-10-14 05:25:39,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:39,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:25:39,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862752264] [2020-10-14 05:25:39,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:25:39,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:39,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:25:39,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:25:39,760 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 13 states. [2020-10-14 05:25:40,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:40,006 INFO L93 Difference]: Finished difference Result 150 states and 168 transitions. [2020-10-14 05:25:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:25:40,006 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-14 05:25:40,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:40,008 INFO L225 Difference]: With dead ends: 150 [2020-10-14 05:25:40,008 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 05:25:40,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:25:40,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 05:25:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 81. [2020-10-14 05:25:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 05:25:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2020-10-14 05:25:40,023 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 37 [2020-10-14 05:25:40,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:40,023 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2020-10-14 05:25:40,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:25:40,023 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2020-10-14 05:25:40,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 05:25:40,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:40,024 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:40,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:25:40,024 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:40,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:40,025 INFO L82 PathProgramCache]: Analyzing trace with hash 999806479, now seen corresponding path program 46 times [2020-10-14 05:25:40,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:40,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358493714] [2020-10-14 05:25:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:40,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:40,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:43,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:43,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:25:43,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:43,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3503 [2020-10-14 05:25:43,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:43,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:43,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:25:43,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:43,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:25:43,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:43,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:43,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:43,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:43,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:43,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:43,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:43,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:43,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:43,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:43,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:43,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 05:25:43,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358493714] [2020-10-14 05:25:43,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:43,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:25:43,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808000128] [2020-10-14 05:25:43,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:25:43,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:43,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:25:43,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:25:43,880 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 19 states. [2020-10-14 05:25:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:44,649 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2020-10-14 05:25:44,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:25:44,650 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-14 05:25:44,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:44,652 INFO L225 Difference]: With dead ends: 108 [2020-10-14 05:25:44,652 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 05:25:44,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:25:44,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 05:25:44,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2020-10-14 05:25:44,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 05:25:44,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-10-14 05:25:44,670 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 37 [2020-10-14 05:25:44,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:44,670 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-10-14 05:25:44,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:25:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-10-14 05:25:44,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 05:25:44,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:44,671 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:44,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 05:25:44,672 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:44,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:44,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1228601265, now seen corresponding path program 47 times [2020-10-14 05:25:44,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:44,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205316670] [2020-10-14 05:25:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:44,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:44,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:45,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:49,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:25:49,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:25:49,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 05:25:49,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:49,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:49,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:25:49,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:49,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:25:49,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:49,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:49,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:49,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:49,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:49,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:49,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:25:49,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:49,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:49,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:49,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:49,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:49,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 05:25:49,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205316670] [2020-10-14 05:25:49,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:49,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:25:49,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154409597] [2020-10-14 05:25:49,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:25:49,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:49,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:25:49,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:25:49,914 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 15 states. [2020-10-14 05:25:50,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:50,176 INFO L93 Difference]: Finished difference Result 145 states and 171 transitions. [2020-10-14 05:25:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:25:50,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-14 05:25:50,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:50,178 INFO L225 Difference]: With dead ends: 145 [2020-10-14 05:25:50,179 INFO L226 Difference]: Without dead ends: 139 [2020-10-14 05:25:50,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:25:50,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-14 05:25:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 92. [2020-10-14 05:25:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 05:25:50,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2020-10-14 05:25:50,198 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 37 [2020-10-14 05:25:50,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:50,198 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2020-10-14 05:25:50,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:25:50,199 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2020-10-14 05:25:50,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:25:50,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:50,199 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:50,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 05:25:50,200 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:50,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:50,200 INFO L82 PathProgramCache]: Analyzing trace with hash 593182617, now seen corresponding path program 48 times [2020-10-14 05:25:50,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:50,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203633906] [2020-10-14 05:25:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:50,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:50,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:54,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:54,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:25:54,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:25:54,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4663 [2020-10-14 05:25:54,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:54,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:54,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:25:54,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:25:54,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:25:54,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:25:55,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:25:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:55,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:55,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:25:55,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:25:55,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:25:55,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:25:55,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:25:55,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:25:55,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:25:55,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:25:55,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:25:55,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:25:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:25:55,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203633906] [2020-10-14 05:25:55,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:25:55,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:25:55,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679885862] [2020-10-14 05:25:55,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:25:55,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:25:55,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:25:55,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:25:55,344 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand 20 states. [2020-10-14 05:25:55,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:25:55,855 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2020-10-14 05:25:55,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:25:55,856 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-14 05:25:55,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:25:55,857 INFO L225 Difference]: With dead ends: 106 [2020-10-14 05:25:55,857 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 05:25:55,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:25:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 05:25:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-14 05:25:55,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 05:25:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2020-10-14 05:25:55,869 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 38 [2020-10-14 05:25:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:25:55,869 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2020-10-14 05:25:55,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:25:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2020-10-14 05:25:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:25:55,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:25:55,870 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:25:55,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 05:25:55,870 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:25:55,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:25:55,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1820362153, now seen corresponding path program 49 times [2020-10-14 05:25:55,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:25:55,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269008679] [2020-10-14 05:25:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:25:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:25:55,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:25:55,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:00,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:00,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:26:00,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:00,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4446 [2020-10-14 05:26:00,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:00,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:00,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:26:00,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:00,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:26:00,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:00,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:00,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:00,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:00,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:00,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:00,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:00,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:00,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:00,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:00,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:00,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:00,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 05:26:00,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269008679] [2020-10-14 05:26:00,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:00,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:26:00,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299506936] [2020-10-14 05:26:00,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:26:00,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:00,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:26:00,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:26:00,692 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 20 states. [2020-10-14 05:26:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:01,257 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2020-10-14 05:26:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:26:01,258 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-14 05:26:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:01,259 INFO L225 Difference]: With dead ends: 108 [2020-10-14 05:26:01,259 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 05:26:01,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:26:01,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 05:26:01,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2020-10-14 05:26:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 05:26:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-10-14 05:26:01,273 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 38 [2020-10-14 05:26:01,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:01,273 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-10-14 05:26:01,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:26:01,273 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-10-14 05:26:01,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:26:01,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:01,274 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:01,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 05:26:01,274 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:01,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:01,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1741926026, now seen corresponding path program 50 times [2020-10-14 05:26:01,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:01,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682029623] [2020-10-14 05:26:01,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:01,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:01,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:01,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:06,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:06,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:26:06,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:06,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 05:26:06,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:06,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:06,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:26:06,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:06,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:26:06,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:06,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:06,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:06,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:06,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:06,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:06,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:06,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:06,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:06,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:06,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:06,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:06,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 05:26:06,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682029623] [2020-10-14 05:26:06,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:06,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:26:06,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595137884] [2020-10-14 05:26:06,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:26:06,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:06,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:26:06,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:26:06,535 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 16 states. [2020-10-14 05:26:06,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:06,861 INFO L93 Difference]: Finished difference Result 146 states and 173 transitions. [2020-10-14 05:26:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:26:06,861 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-14 05:26:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:06,862 INFO L225 Difference]: With dead ends: 146 [2020-10-14 05:26:06,862 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 05:26:06,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:26:06,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 05:26:06,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 92. [2020-10-14 05:26:06,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 05:26:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2020-10-14 05:26:06,883 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 38 [2020-10-14 05:26:06,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:06,883 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2020-10-14 05:26:06,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:26:06,884 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2020-10-14 05:26:06,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:26:06,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:06,884 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:06,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 05:26:06,885 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:06,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:06,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1487784271, now seen corresponding path program 51 times [2020-10-14 05:26:06,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:06,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381863401] [2020-10-14 05:26:06,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:06,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:07,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:11,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:11,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 05:26:11,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:11,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4997 [2020-10-14 05:26:11,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:11,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:11,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:26:11,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:11,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:26:11,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:12,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:12,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:12,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:12,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:12,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:12,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:12,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:12,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:12,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:12,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:12,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:12,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 05:26:12,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381863401] [2020-10-14 05:26:12,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:12,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:26:12,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880289994] [2020-10-14 05:26:12,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:26:12,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:12,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:26:12,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:26:12,278 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand 21 states. [2020-10-14 05:26:12,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:12,920 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2020-10-14 05:26:12,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:26:12,921 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-14 05:26:12,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:12,922 INFO L225 Difference]: With dead ends: 119 [2020-10-14 05:26:12,922 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 05:26:12,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:26:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 05:26:12,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-14 05:26:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 05:26:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2020-10-14 05:26:12,945 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 39 [2020-10-14 05:26:12,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:12,945 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2020-10-14 05:26:12,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:26:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2020-10-14 05:26:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:26:12,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:12,946 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:12,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 05:26:12,947 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:12,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:12,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1438166947, now seen corresponding path program 52 times [2020-10-14 05:26:12,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:12,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505505994] [2020-10-14 05:26:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:12,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:13,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:16,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:16,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 05:26:16,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:16,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3679 [2020-10-14 05:26:16,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:16,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:16,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:26:16,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:16,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:26:16,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:17,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:17,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:17,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:17,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:17,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:17,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:17,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:17,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:17,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-14 05:26:17,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505505994] [2020-10-14 05:26:17,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:17,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:26:17,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516351298] [2020-10-14 05:26:17,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:26:17,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:17,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:26:17,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:26:17,012 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand 20 states. [2020-10-14 05:26:17,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:17,800 INFO L93 Difference]: Finished difference Result 122 states and 135 transitions. [2020-10-14 05:26:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:26:17,801 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-10-14 05:26:17,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:17,802 INFO L225 Difference]: With dead ends: 122 [2020-10-14 05:26:17,802 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 05:26:17,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:26:17,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 05:26:17,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2020-10-14 05:26:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 05:26:17,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2020-10-14 05:26:17,817 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 39 [2020-10-14 05:26:17,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:17,817 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2020-10-14 05:26:17,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:26:17,817 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2020-10-14 05:26:17,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:26:17,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:17,818 INFO L422 BasicCegarLoop]: trace histogram [13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:17,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 05:26:17,818 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:17,819 INFO L82 PathProgramCache]: Analyzing trace with hash -661008465, now seen corresponding path program 53 times [2020-10-14 05:26:17,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:17,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532833] [2020-10-14 05:26:17,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:17,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:17,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:19,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:22,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:22,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 05:26:22,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:22,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:26:22,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:22,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:22,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:26:22,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 05:26:22,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:26:22,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:23,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:23,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:23,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:23,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:23,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:23,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:23,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:23,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:23,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:23,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:23,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:23,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:26:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-14 05:26:23,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532833] [2020-10-14 05:26:23,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:23,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:26:23,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936690619] [2020-10-14 05:26:23,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:26:23,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:23,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:26:23,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:26:23,237 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand 16 states. [2020-10-14 05:26:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:24,122 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2020-10-14 05:26:24,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:26:24,123 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-14 05:26:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:24,124 INFO L225 Difference]: With dead ends: 129 [2020-10-14 05:26:24,125 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 05:26:24,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:26:24,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 05:26:24,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-14 05:26:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-14 05:26:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2020-10-14 05:26:24,159 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 39 [2020-10-14 05:26:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:24,160 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2020-10-14 05:26:24,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:26:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2020-10-14 05:26:24,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:26:24,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:24,161 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:24,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 05:26:24,162 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:24,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:24,162 INFO L82 PathProgramCache]: Analyzing trace with hash -232195479, now seen corresponding path program 54 times [2020-10-14 05:26:24,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:24,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669931536] [2020-10-14 05:26:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:24,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:24,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:24,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:26:24,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:24,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 713 [2020-10-14 05:26:24,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:24,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:24,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:26:24,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 05:26:24,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:26:24,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:25,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:25,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:25,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:25,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:25,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:25,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:25,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:25,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:25,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:25,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:25,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:25,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 05:26:25,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669931536] [2020-10-14 05:26:25,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:25,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:26:25,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726670520] [2020-10-14 05:26:25,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:26:25,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:25,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:26:25,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:26:25,325 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand 14 states. [2020-10-14 05:26:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:25,875 INFO L93 Difference]: Finished difference Result 188 states and 212 transitions. [2020-10-14 05:26:25,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:26:25,876 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-14 05:26:25,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:25,878 INFO L225 Difference]: With dead ends: 188 [2020-10-14 05:26:25,878 INFO L226 Difference]: Without dead ends: 173 [2020-10-14 05:26:25,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:26:25,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-14 05:26:25,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 107. [2020-10-14 05:26:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 05:26:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2020-10-14 05:26:25,917 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 40 [2020-10-14 05:26:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:25,918 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2020-10-14 05:26:25,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:26:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2020-10-14 05:26:25,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:26:25,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:25,919 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:25,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 05:26:25,920 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:25,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:25,921 INFO L82 PathProgramCache]: Analyzing trace with hash -844335527, now seen corresponding path program 55 times [2020-10-14 05:26:25,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:25,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259324961] [2020-10-14 05:26:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:25,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:26,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:30,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:30,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:26:30,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:30,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 05:26:30,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:30,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:30,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:26:30,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:30,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:26:30,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:31,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:31,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:31,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:31,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:31,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:31,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:31,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:31,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:31,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:31,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:31,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:31,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-14 05:26:31,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259324961] [2020-10-14 05:26:31,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:31,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:26:31,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2176530] [2020-10-14 05:26:31,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:26:31,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:31,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:26:31,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:26:31,348 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand 21 states. [2020-10-14 05:26:32,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:32,212 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-10-14 05:26:32,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:26:32,213 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-10-14 05:26:32,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:32,214 INFO L225 Difference]: With dead ends: 136 [2020-10-14 05:26:32,214 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 05:26:32,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:26:32,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 05:26:32,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2020-10-14 05:26:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-14 05:26:32,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2020-10-14 05:26:32,232 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 40 [2020-10-14 05:26:32,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:32,233 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2020-10-14 05:26:32,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:26:32,233 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2020-10-14 05:26:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 05:26:32,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:32,233 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:32,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 05:26:32,234 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:32,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:32,234 INFO L82 PathProgramCache]: Analyzing trace with hash -2011960177, now seen corresponding path program 56 times [2020-10-14 05:26:32,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:32,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921645645] [2020-10-14 05:26:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:32,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:32,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:37,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:37,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 05:26:37,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:37,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:26:37,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:37,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:26:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:26:37,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:37,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:37,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:37,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:37,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:37,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:37,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:37,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:37,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:37,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:37,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:37,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:37,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 05:26:37,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921645645] [2020-10-14 05:26:37,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:37,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:26:37,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425817263] [2020-10-14 05:26:37,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:26:37,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:37,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:26:37,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:26:37,696 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand 22 states. [2020-10-14 05:26:38,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:38,273 INFO L93 Difference]: Finished difference Result 123 states and 136 transitions. [2020-10-14 05:26:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:26:38,275 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 41 [2020-10-14 05:26:38,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:38,275 INFO L225 Difference]: With dead ends: 123 [2020-10-14 05:26:38,276 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 05:26:38,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:26:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 05:26:38,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-14 05:26:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-14 05:26:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2020-10-14 05:26:38,295 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 41 [2020-10-14 05:26:38,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:38,295 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2020-10-14 05:26:38,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:26:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2020-10-14 05:26:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 05:26:38,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:38,296 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:38,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 05:26:38,296 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:38,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:38,297 INFO L82 PathProgramCache]: Analyzing trace with hash 384569309, now seen corresponding path program 57 times [2020-10-14 05:26:38,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:38,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138397509] [2020-10-14 05:26:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:38,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:38,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:43,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:43,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 05:26:43,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:43,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 05:26:43,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:43,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:43,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:26:43,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:43,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:26:43,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:43,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:43,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:43,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:43,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:43,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:43,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:26:43,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:43,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:43,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:43,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:43,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:43,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-14 05:26:43,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138397509] [2020-10-14 05:26:43,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:43,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:26:43,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690382708] [2020-10-14 05:26:43,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:26:43,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:43,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:26:43,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:26:43,754 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand 22 states. [2020-10-14 05:26:44,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:44,423 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2020-10-14 05:26:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:26:44,424 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 41 [2020-10-14 05:26:44,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:44,426 INFO L225 Difference]: With dead ends: 125 [2020-10-14 05:26:44,426 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 05:26:44,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:26:44,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 05:26:44,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2020-10-14 05:26:44,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 05:26:44,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-10-14 05:26:44,459 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 41 [2020-10-14 05:26:44,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:44,460 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-10-14 05:26:44,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:26:44,460 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-10-14 05:26:44,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 05:26:44,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:44,461 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:44,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 05:26:44,461 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:44,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:44,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1734302658, now seen corresponding path program 58 times [2020-10-14 05:26:44,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:44,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209532481] [2020-10-14 05:26:44,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:44,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:44,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:46,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:49,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:49,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 05:26:49,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:26:49,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:26:49,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:49,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:49,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:26:49,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:49,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 05:26:49,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:49,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:49,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:49,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:49,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:49,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:49,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:49,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:49,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:49,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:49,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:49,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:49,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:26:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-14 05:26:49,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209532481] [2020-10-14 05:26:49,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:49,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:26:49,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416038066] [2020-10-14 05:26:49,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:26:49,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:49,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:26:49,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:26:49,781 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 17 states. [2020-10-14 05:26:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:50,149 INFO L93 Difference]: Finished difference Result 166 states and 195 transitions. [2020-10-14 05:26:50,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:26:50,149 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-14 05:26:50,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:50,151 INFO L225 Difference]: With dead ends: 166 [2020-10-14 05:26:50,151 INFO L226 Difference]: Without dead ends: 160 [2020-10-14 05:26:50,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:26:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-14 05:26:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 108. [2020-10-14 05:26:50,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-14 05:26:50,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2020-10-14 05:26:50,169 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 41 [2020-10-14 05:26:50,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:50,169 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2020-10-14 05:26:50,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:26:50,169 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2020-10-14 05:26:50,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:26:50,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:50,170 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:50,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 05:26:50,170 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:50,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:50,170 INFO L82 PathProgramCache]: Analyzing trace with hash -174086439, now seen corresponding path program 59 times [2020-10-14 05:26:50,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:50,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524489725] [2020-10-14 05:26:50,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:50,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:50,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:55,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:55,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:26:55,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:26:55,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-14 05:26:55,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:55,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:55,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:26:55,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:26:55,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:26:55,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:55,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:26:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:55,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:55,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:26:55,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:26:55,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:26:55,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:26:55,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:26:55,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:26:55,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:26:55,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:26:55,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:26:55,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:26:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-14 05:26:55,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524489725] [2020-10-14 05:26:55,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:26:55,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:26:55,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780764457] [2020-10-14 05:26:55,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:26:55,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:26:55,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:26:55,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:26:55,719 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand 23 states. [2020-10-14 05:26:56,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:26:56,479 INFO L93 Difference]: Finished difference Result 137 states and 151 transitions. [2020-10-14 05:26:56,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:26:56,480 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-10-14 05:26:56,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:26:56,481 INFO L225 Difference]: With dead ends: 137 [2020-10-14 05:26:56,481 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 05:26:56,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:26:56,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 05:26:56,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2020-10-14 05:26:56,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 05:26:56,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2020-10-14 05:26:56,508 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 42 [2020-10-14 05:26:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:26:56,508 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2020-10-14 05:26:56,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:26:56,508 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2020-10-14 05:26:56,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:26:56,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:26:56,509 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:26:56,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 05:26:56,510 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:26:56,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:26:56,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1970558743, now seen corresponding path program 60 times [2020-10-14 05:26:56,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:26:56,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268050286] [2020-10-14 05:26:56,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:26:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:26:56,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:26:56,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:01,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:01,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:27:01,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:01,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 05:27:01,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:01,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:01,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:27:01,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:01,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:27:01,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:01,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:01,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:01,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:01,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:01,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:01,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:27:01,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:01,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:01,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:01,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:01,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:01,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-14 05:27:01,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268050286] [2020-10-14 05:27:01,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:01,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:27:01,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529655897] [2020-10-14 05:27:01,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:27:01,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:01,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:27:01,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:27:01,995 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand 22 states. [2020-10-14 05:27:02,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:02,939 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2020-10-14 05:27:02,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:27:02,942 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-10-14 05:27:02,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:02,944 INFO L225 Difference]: With dead ends: 140 [2020-10-14 05:27:02,944 INFO L226 Difference]: Without dead ends: 123 [2020-10-14 05:27:02,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:27:02,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-14 05:27:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 110. [2020-10-14 05:27:02,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 05:27:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2020-10-14 05:27:02,968 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 42 [2020-10-14 05:27:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:02,968 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2020-10-14 05:27:02,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:27:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2020-10-14 05:27:02,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:27:02,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:02,969 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:02,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 05:27:02,969 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:02,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:02,970 INFO L82 PathProgramCache]: Analyzing trace with hash 959165689, now seen corresponding path program 61 times [2020-10-14 05:27:02,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:02,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574013400] [2020-10-14 05:27:02,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:02,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:03,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:03,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:07,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:07,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:27:07,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:27:07,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:27:07,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:07,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:07,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:27:07,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 05:27:07,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:27:07,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:08,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:08,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:08,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:08,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:08,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:08,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:08,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:08,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:08,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:08,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:08,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:08,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-14 05:27:08,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574013400] [2020-10-14 05:27:08,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:08,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:27:08,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982070859] [2020-10-14 05:27:08,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:27:08,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:08,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:27:08,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:27:08,378 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand 18 states. [2020-10-14 05:27:09,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:09,020 INFO L93 Difference]: Finished difference Result 148 states and 164 transitions. [2020-10-14 05:27:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:27:09,020 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-14 05:27:09,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:09,021 INFO L225 Difference]: With dead ends: 148 [2020-10-14 05:27:09,021 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 05:27:09,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:27:09,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 05:27:09,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-14 05:27:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 05:27:09,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2020-10-14 05:27:09,047 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 42 [2020-10-14 05:27:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:09,048 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2020-10-14 05:27:09,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:27:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2020-10-14 05:27:09,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:27:09,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:09,048 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:09,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-14 05:27:09,049 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:09,049 INFO L82 PathProgramCache]: Analyzing trace with hash -312545443, now seen corresponding path program 62 times [2020-10-14 05:27:09,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:09,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099525874] [2020-10-14 05:27:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:09,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:09,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:09,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:27:09,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:09,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-14 05:27:09,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:09,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:09,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:27:09,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:27:09,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:27:09,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:10,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:10,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:10,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:10,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:10,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:10,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:10,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:10,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:10,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:10,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:10,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:10,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-14 05:27:10,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099525874] [2020-10-14 05:27:10,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:10,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:27:10,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400073360] [2020-10-14 05:27:10,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:27:10,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:10,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:27:10,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:27:10,143 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand 15 states. [2020-10-14 05:27:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:10,486 INFO L93 Difference]: Finished difference Result 212 states and 238 transitions. [2020-10-14 05:27:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:27:10,487 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-14 05:27:10,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:10,489 INFO L225 Difference]: With dead ends: 212 [2020-10-14 05:27:10,489 INFO L226 Difference]: Without dead ends: 196 [2020-10-14 05:27:10,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:27:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-14 05:27:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 123. [2020-10-14 05:27:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 05:27:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 138 transitions. [2020-10-14 05:27:10,515 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 138 transitions. Word has length 43 [2020-10-14 05:27:10,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:10,516 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 138 transitions. [2020-10-14 05:27:10,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:27:10,516 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 138 transitions. [2020-10-14 05:27:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:27:10,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:10,517 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:10,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-14 05:27:10,517 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:10,517 INFO L82 PathProgramCache]: Analyzing trace with hash 965424591, now seen corresponding path program 63 times [2020-10-14 05:27:10,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:10,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082385423] [2020-10-14 05:27:10,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:10,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:10,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:15,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:15,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:27:15,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:15,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:27:15,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:15,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:15,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:27:15,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:27:15,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:27:15,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:16,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:16,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:16,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:16,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:16,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:16,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:16,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:16,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:16,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:16,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:16,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:16,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:27:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-14 05:27:16,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082385423] [2020-10-14 05:27:16,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:16,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:27:16,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228354920] [2020-10-14 05:27:16,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:27:16,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:27:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:27:16,029 INFO L87 Difference]: Start difference. First operand 123 states and 138 transitions. Second operand 23 states. [2020-10-14 05:27:17,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:27:17,096 INFO L93 Difference]: Finished difference Result 154 states and 169 transitions. [2020-10-14 05:27:17,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:27:17,101 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2020-10-14 05:27:17,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:27:17,102 INFO L225 Difference]: With dead ends: 154 [2020-10-14 05:27:17,102 INFO L226 Difference]: Without dead ends: 137 [2020-10-14 05:27:17,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:27:17,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-14 05:27:17,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 124. [2020-10-14 05:27:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 05:27:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 139 transitions. [2020-10-14 05:27:17,130 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 139 transitions. Word has length 43 [2020-10-14 05:27:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:27:17,131 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 139 transitions. [2020-10-14 05:27:17,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:27:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 139 transitions. [2020-10-14 05:27:17,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:27:17,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:27:17,132 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:27:17,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-14 05:27:17,132 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:27:17,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:27:17,132 INFO L82 PathProgramCache]: Analyzing trace with hash -309807271, now seen corresponding path program 64 times [2020-10-14 05:27:17,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:27:17,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187200805] [2020-10-14 05:27:17,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:27:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:17,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:17,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:22,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:22,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:27:22,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:27:22,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 05:27:22,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:22,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:22,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:27:22,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 05:27:22,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:27:22,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:22,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:27:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:27:22,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:27:22,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:27:22,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:27:22,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:27:22,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:27:22,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:27:22,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:27:22,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:27:22,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:27:22,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:27:22,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:27:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-14 05:27:22,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187200805] [2020-10-14 05:27:22,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:27:22,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:27:22,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420312232] [2020-10-14 05:27:22,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:27:22,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:27:22,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:27:22,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:27:22,880 INFO L87 Difference]: Start difference. First operand 124 states and 139 transitions. Second operand 24 states. [2020-10-14 05:27:24,906 WARN L838 $PredicateComparison]: unable to prove that (and (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 9)) 4294967296)) 4294967303)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 11)) 4294967296)) 4294967305)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 4)) 4294967296)) 4294967298)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 2)) 4294967296)) 4294967296)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 3)) 4294967296)) 4294967297)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 7)) 4294967296)) 4294967301)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 5)) 4294967296)) 4294967299)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 8)) 4294967296)) 4294967302)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 6)) 4294967296)) 4294967300)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 10)) 4294967296)) 4294967304))) is different from false [2020-10-14 05:27:26,271 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-10-14 05:27:28,803 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-14 05:27:32,538 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 54 [2020-10-14 05:27:42,341 WARN L193 SmtUtils]: Spent 4.51 s on a formula simplification that was a NOOP. DAG size: 61 [2020-10-14 05:28:02,614 WARN L193 SmtUtils]: Spent 8.97 s on a formula simplification that was a NOOP. DAG size: 68