/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=BIGGEST --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/nested5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:18:59,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:18:59,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:18:59,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:18:59,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:18:59,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:18:59,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:18:59,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:18:59,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:18:59,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:18:59,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:18:59,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:18:59,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:18:59,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:18:59,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:18:59,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:18:59,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:18:59,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:18:59,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:18:59,722 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:18:59,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:18:59,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:18:59,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:18:59,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:18:59,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:18:59,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:18:59,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:18:59,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:18:59,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:18:59,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:18:59,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:18:59,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:18:59,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:18:59,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:18:59,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:18:59,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:18:59,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:18:59,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:18:59,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:18:59,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:18:59,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:18:59,737 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 [2020-10-12 16:18:59,759 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:18:59,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:18:59,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:18:59,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:18:59,761 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:18:59,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:18:59,761 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:18:59,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:18:59,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:18:59,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:18:59,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:18:59,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:18:59,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:18:59,763 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:18:59,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:18:59,763 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:18:59,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:18:59,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:18:59,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:18:59,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:18:59,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:18:59,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:18:59,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:18:59,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:18:59,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:18:59,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:18:59,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:18:59,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:18:59,765 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:18:59,766 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:19:00,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:19:00,085 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:19:00,091 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:19:00,093 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:19:00,096 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:19:00,097 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-2.c [2020-10-12 16:19:00,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/611645b80/6e5b62744914433ca982a2a0689ef8b3/FLAG2a484ba3b [2020-10-12 16:19:00,604 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:19:00,605 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested5-2.c [2020-10-12 16:19:00,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/611645b80/6e5b62744914433ca982a2a0689ef8b3/FLAG2a484ba3b [2020-10-12 16:19:00,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/611645b80/6e5b62744914433ca982a2a0689ef8b3 [2020-10-12 16:19:01,003 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:19:01,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:19:01,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:19:01,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:19:01,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:19:01,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:19:00" (1/1) ... [2020-10-12 16:19:01,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24cf129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:01, skipping insertion in model container [2020-10-12 16:19:01,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:19:00" (1/1) ... [2020-10-12 16:19:01,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:19:01,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:19:01,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:19:01,200 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:19:01,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:19:01,230 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:19:01,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:01 WrapperNode [2020-10-12 16:19:01,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:19:01,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:19:01,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:19:01,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:19:01,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:01" (1/1) ... [2020-10-12 16:19:01,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:01" (1/1) ... [2020-10-12 16:19:01,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:01" (1/1) ... [2020-10-12 16:19:01,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:01" (1/1) ... [2020-10-12 16:19:01,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:01" (1/1) ... [2020-10-12 16:19:01,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:01" (1/1) ... [2020-10-12 16:19:01,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:01" (1/1) ... [2020-10-12 16:19:01,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:19:01,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:19:01,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:19:01,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:19:01,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:01" (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 [2020-10-12 16:19:01,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:19:01,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:19:01,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:19:01,410 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:19:01,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:19:01,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:19:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:19:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:19:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:19:01,614 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:19:01,614 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-12 16:19:01,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:19:01 BoogieIcfgContainer [2020-10-12 16:19:01,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:19:01,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:19:01,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:19:01,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:19:01,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:19:00" (1/3) ... [2020-10-12 16:19:01,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ac4949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:19:01, skipping insertion in model container [2020-10-12 16:19:01,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:19:01" (2/3) ... [2020-10-12 16:19:01,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ac4949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:19:01, skipping insertion in model container [2020-10-12 16:19:01,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:19:01" (3/3) ... [2020-10-12 16:19:01,626 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-2.c [2020-10-12 16:19:01,638 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:19:01,645 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:19:01,663 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:19:01,714 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:19:01,714 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:19:01,715 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:19:01,715 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:19:01,715 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:19:01,715 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:19:01,715 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:19:01,716 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:19:01,738 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-12 16:19:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:19:01,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:01,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:01,747 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:01,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:01,753 INFO L82 PathProgramCache]: Analyzing trace with hash 2037426592, now seen corresponding path program 1 times [2020-10-12 16:19:01,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:01,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669143077] [2020-10-12 16:19:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:01,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:01,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:02,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:02,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:19:02,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:02,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-12 16:19:02,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:02,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:19:02,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:02,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:19:02,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 16:19:02,440 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 17 [2020-10-12 16:19:02,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:02,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:02,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:02,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:02,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:02,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:19:02,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:02,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:02,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:02,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:02,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:02,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669143077] [2020-10-12 16:19:02,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:19:02,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:19:02,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513733863] [2020-10-12 16:19:02,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:19:02,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:02,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:19:02,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:19:02,502 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-10-12 16:19:02,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:02,608 INFO L93 Difference]: Finished difference Result 67 states and 100 transitions. [2020-10-12 16:19:02,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:19:02,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-12 16:19:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:02,620 INFO L225 Difference]: With dead ends: 67 [2020-10-12 16:19:02,621 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 16:19:02,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:19:02,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 16:19:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2020-10-12 16:19:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 16:19:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-12 16:19:02,673 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2020-10-12 16:19:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:02,674 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-12 16:19:02,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:19:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-12 16:19:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:19:02,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:02,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:02,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:19:02,676 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash -935219944, now seen corresponding path program 1 times [2020-10-12 16:19:02,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:02,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671653266] [2020-10-12 16:19:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:02,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:02,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:02,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:19:02,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:02,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-12 16:19:02,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:02,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:19:02,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:02,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 16:19:02,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:02,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:02,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:02,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:02,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:02,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:02,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:19:02,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:02,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:02,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:02,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:02,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:02,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671653266] [2020-10-12 16:19:02,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:02,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:19:02,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578923825] [2020-10-12 16:19:02,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:19:02,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:02,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:19:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:19:02,961 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2020-10-12 16:19:02,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:02,991 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-10-12 16:19:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:19:02,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-12 16:19:02,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:02,994 INFO L225 Difference]: With dead ends: 56 [2020-10-12 16:19:02,994 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 16:19:02,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:19:02,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 16:19:03,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-10-12 16:19:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 16:19:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-12 16:19:03,003 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2020-10-12 16:19:03,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:03,003 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-12 16:19:03,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:19:03,004 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-12 16:19:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:19:03,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:03,005 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:03,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:19:03,005 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:03,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:03,006 INFO L82 PathProgramCache]: Analyzing trace with hash -465234410, now seen corresponding path program 2 times [2020-10-12 16:19:03,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:03,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558820657] [2020-10-12 16:19:03,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:03,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:03,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:03,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:19:03,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:03,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-12 16:19:03,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:19:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:03,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:03,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:03,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:03,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:03,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:03,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:03,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:03,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:03,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:03,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:03,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:03,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:03,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558820657] [2020-10-12 16:19:03,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:03,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:19:03,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278774943] [2020-10-12 16:19:03,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:19:03,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:03,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:19:03,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:19:03,178 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-10-12 16:19:03,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:03,227 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-10-12 16:19:03,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:19:03,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-12 16:19:03,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:03,232 INFO L225 Difference]: With dead ends: 55 [2020-10-12 16:19:03,232 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 16:19:03,233 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 [2020-10-12 16:19:03,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 16:19:03,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-10-12 16:19:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 16:19:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-12 16:19:03,247 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-10-12 16:19:03,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:03,251 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-12 16:19:03,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:19:03,251 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-12 16:19:03,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:19:03,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:03,252 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:03,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:19:03,252 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:03,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:03,253 INFO L82 PathProgramCache]: Analyzing trace with hash 219297684, now seen corresponding path program 3 times [2020-10-12 16:19:03,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:03,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502198438] [2020-10-12 16:19:03,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:03,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:03,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:03,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:19:03,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:03,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-12 16:19:03,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:03,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:19:03,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:03,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:19:03,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:03,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:03,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:03,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:03,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:03,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:03,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:03,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:03,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:03,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:03,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:03,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:03,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502198438] [2020-10-12 16:19:03,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:03,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:19:03,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185939588] [2020-10-12 16:19:03,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:19:03,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:03,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:19:03,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:19:03,496 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-10-12 16:19:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:03,541 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2020-10-12 16:19:03,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:19:03,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-12 16:19:03,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:03,543 INFO L225 Difference]: With dead ends: 59 [2020-10-12 16:19:03,543 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 16:19:03,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:19:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 16:19:03,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-10-12 16:19:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 16:19:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-12 16:19:03,551 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-10-12 16:19:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:03,551 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-12 16:19:03,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:19:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-12 16:19:03,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:19:03,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:03,553 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:03,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:19:03,553 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:03,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:03,554 INFO L82 PathProgramCache]: Analyzing trace with hash 924643730, now seen corresponding path program 4 times [2020-10-12 16:19:03,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:03,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823770450] [2020-10-12 16:19:03,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:03,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:03,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:03,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:03,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:19:03,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:03,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-12 16:19:03,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:03,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:19:03,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:03,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:19:03,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:04,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:04,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:04,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:04,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:04,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:04,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:04,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:04,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:04,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:04,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:04,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:19:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:04,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823770450] [2020-10-12 16:19:04,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:04,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:19:04,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848656484] [2020-10-12 16:19:04,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:19:04,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:04,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:19:04,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:19:04,076 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 9 states. [2020-10-12 16:19:04,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:04,247 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2020-10-12 16:19:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:19:04,248 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-12 16:19:04,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:04,249 INFO L225 Difference]: With dead ends: 54 [2020-10-12 16:19:04,250 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 16:19:04,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:19:04,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 16:19:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2020-10-12 16:19:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 16:19:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-12 16:19:04,258 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 22 [2020-10-12 16:19:04,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:04,259 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-12 16:19:04,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:19:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-12 16:19:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:19:04,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:04,260 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:04,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:19:04,260 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:04,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:04,261 INFO L82 PathProgramCache]: Analyzing trace with hash 157361168, now seen corresponding path program 5 times [2020-10-12 16:19:04,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:04,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405620381] [2020-10-12 16:19:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:04,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:04,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:04,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:19:04,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:04,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-12 16:19:04,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:04,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:19:04,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:04,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:19:04,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:04,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:04,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:04,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:04,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:04,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:04,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:04,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:04,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:04,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:04,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:04,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:04,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405620381] [2020-10-12 16:19:04,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:04,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:19:04,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711338389] [2020-10-12 16:19:04,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:19:04,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:04,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:19:04,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:19:04,494 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 8 states. [2020-10-12 16:19:04,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:04,563 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-10-12 16:19:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:19:04,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-12 16:19:04,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:04,565 INFO L225 Difference]: With dead ends: 72 [2020-10-12 16:19:04,565 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 16:19:04,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:19:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 16:19:04,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-10-12 16:19:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 16:19:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-12 16:19:04,572 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-10-12 16:19:04,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:04,573 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-12 16:19:04,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:19:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-12 16:19:04,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:19:04,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:04,574 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:04,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:19:04,575 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:04,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:04,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1533193998, now seen corresponding path program 6 times [2020-10-12 16:19:04,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:04,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001776346] [2020-10-12 16:19:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:04,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:04,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:04,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:19:04,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:04,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-12 16:19:04,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:04,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:19:04,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:04,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:19:04,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:04,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:04,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:04,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:04,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:04,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:04,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:04,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:04,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:04,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:04,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:04,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:04,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001776346] [2020-10-12 16:19:04,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:04,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:19:04,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492198017] [2020-10-12 16:19:04,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:19:04,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:04,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:19:04,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:19:04,832 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-10-12 16:19:04,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:04,929 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-10-12 16:19:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:19:04,929 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-12 16:19:04,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:04,930 INFO L225 Difference]: With dead ends: 71 [2020-10-12 16:19:04,931 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 16:19:04,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:19:04,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 16:19:04,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-10-12 16:19:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 16:19:04,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-12 16:19:04,937 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-10-12 16:19:04,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:04,938 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-12 16:19:04,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:19:04,938 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-12 16:19:04,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:19:04,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:04,939 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:04,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:19:04,939 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:04,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:04,940 INFO L82 PathProgramCache]: Analyzing trace with hash 858616460, now seen corresponding path program 7 times [2020-10-12 16:19:04,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:04,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850440525] [2020-10-12 16:19:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:04,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:05,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:05,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:19:05,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:05,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-12 16:19:05,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:05,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:19:05,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:05,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:19:05,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:05,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:05,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:05,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:05,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:05,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:05,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:05,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:05,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:05,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:05,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:05,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:05,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850440525] [2020-10-12 16:19:05,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:05,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:19:05,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956073641] [2020-10-12 16:19:05,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:19:05,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:05,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:19:05,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:19:05,258 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-10-12 16:19:05,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:05,366 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-12 16:19:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:19:05,367 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-12 16:19:05,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:05,368 INFO L225 Difference]: With dead ends: 75 [2020-10-12 16:19:05,368 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 16:19:05,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:19:05,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 16:19:05,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-10-12 16:19:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 16:19:05,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-12 16:19:05,374 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-10-12 16:19:05,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:05,375 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-12 16:19:05,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:19:05,375 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-12 16:19:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:19:05,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:05,376 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:05,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:19:05,377 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:05,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:05,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1129664138, now seen corresponding path program 8 times [2020-10-12 16:19:05,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:05,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136393185] [2020-10-12 16:19:05,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:05,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:05,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:05,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:05,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:19:05,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:05,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-12 16:19:05,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:05,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:19:05,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:05,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:19:05,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:09,597 WARN L193 SmtUtils]: Spent 3.60 s on a formula simplification. DAG size of input: 52 DAG size of output: 15 [2020-10-12 16:19:09,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:09,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:09,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:09,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:09,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:09,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:09,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:09,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:09,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:09,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136393185] [2020-10-12 16:19:09,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:09,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:19:09,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628465645] [2020-10-12 16:19:09,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:19:09,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:09,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:19:09,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:19:09,652 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 13 states. [2020-10-12 16:19:09,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:09,936 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-10-12 16:19:09,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:19:09,938 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-12 16:19:09,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:09,939 INFO L225 Difference]: With dead ends: 62 [2020-10-12 16:19:09,940 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 16:19:09,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:19:09,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 16:19:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-12 16:19:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 16:19:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-12 16:19:09,956 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 30 [2020-10-12 16:19:09,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:09,956 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-12 16:19:09,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:19:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-12 16:19:09,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:19:09,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:09,959 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:09,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:19:09,959 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:09,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:09,960 INFO L82 PathProgramCache]: Analyzing trace with hash -386522360, now seen corresponding path program 9 times [2020-10-12 16:19:09,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:09,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56723884] [2020-10-12 16:19:09,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:09,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:10,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:10,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:19:10,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:10,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-12 16:19:10,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:10,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:19:10,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:10,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:19:10,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:10,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:10,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:10,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:10,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:10,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:10,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:10,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:10,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:10,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56723884] [2020-10-12 16:19:10,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:10,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:19:10,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162666555] [2020-10-12 16:19:10,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:19:10,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:10,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:19:10,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:19:10,363 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 12 states. [2020-10-12 16:19:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:10,513 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-12 16:19:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:19:10,513 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-12 16:19:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:10,514 INFO L225 Difference]: With dead ends: 88 [2020-10-12 16:19:10,514 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 16:19:10,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:19:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 16:19:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-10-12 16:19:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 16:19:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-12 16:19:10,520 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-10-12 16:19:10,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:10,521 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-12 16:19:10,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:19:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-12 16:19:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:19:10,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:10,522 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:10,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:19:10,523 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:10,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1447833594, now seen corresponding path program 10 times [2020-10-12 16:19:10,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:10,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361982423] [2020-10-12 16:19:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:10,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:10,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:10,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:19:10,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:10,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-12 16:19:10,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:10,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:19:10,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:10,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:19:10,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:10,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:10,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:10,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:10,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:10,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:10,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:10,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:10,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:10,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:10,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:10,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:10,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361982423] [2020-10-12 16:19:10,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:10,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:19:10,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774479522] [2020-10-12 16:19:10,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:19:10,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:10,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:19:10,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:19:10,942 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-10-12 16:19:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:11,126 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-12 16:19:11,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:19:11,126 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-12 16:19:11,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:11,127 INFO L225 Difference]: With dead ends: 87 [2020-10-12 16:19:11,127 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 16:19:11,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:19:11,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 16:19:11,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-12 16:19:11,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 16:19:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-12 16:19:11,133 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-10-12 16:19:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:11,134 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-12 16:19:11,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:19:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-12 16:19:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:19:11,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:11,135 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:11,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:19:11,135 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:11,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:11,136 INFO L82 PathProgramCache]: Analyzing trace with hash 834286980, now seen corresponding path program 11 times [2020-10-12 16:19:11,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:11,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217560191] [2020-10-12 16:19:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:11,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:11,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:11,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:19:11,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:11,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-12 16:19:11,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:11,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:19:11,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:11,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:19:11,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:11,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:11,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:11,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:11,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:11,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:11,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:11,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:11,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:11,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:11,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:11,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:19:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:11,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217560191] [2020-10-12 16:19:11,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:11,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:19:11,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156923956] [2020-10-12 16:19:11,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:19:11,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:11,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:19:11,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:19:11,801 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 14 states. [2020-10-12 16:19:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:12,003 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-10-12 16:19:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:19:12,003 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-12 16:19:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:12,004 INFO L225 Difference]: With dead ends: 91 [2020-10-12 16:19:12,004 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 16:19:12,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:19:12,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 16:19:12,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2020-10-12 16:19:12,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 16:19:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-12 16:19:12,017 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-10-12 16:19:12,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:12,021 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-12 16:19:12,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:19:12,021 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-12 16:19:12,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:19:12,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:12,022 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:12,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:19:12,024 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:12,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:12,025 INFO L82 PathProgramCache]: Analyzing trace with hash -776129662, now seen corresponding path program 12 times [2020-10-12 16:19:12,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:12,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804467567] [2020-10-12 16:19:12,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:12,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:12,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:12,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:12,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:19:12,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:12,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-12 16:19:12,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:12,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:19:12,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:12,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:19:12,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:15,063 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 44 DAG size of output: 15 [2020-10-12 16:19:15,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:15,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:15,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:15,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:15,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:15,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:15,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:15,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:15,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:15,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:15,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:15,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804467567] [2020-10-12 16:19:15,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:15,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:19:15,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758495887] [2020-10-12 16:19:15,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:19:15,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:15,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:19:15,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:19:15,126 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 17 states. [2020-10-12 16:19:15,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:15,525 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-12 16:19:15,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:19:15,528 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-12 16:19:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:15,529 INFO L225 Difference]: With dead ends: 70 [2020-10-12 16:19:15,530 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 16:19:15,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:19:15,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 16:19:15,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2020-10-12 16:19:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 16:19:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-12 16:19:15,541 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 38 [2020-10-12 16:19:15,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:15,542 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-12 16:19:15,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:19:15,542 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-12 16:19:15,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:19:15,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:15,543 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:15,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:19:15,544 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:15,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:15,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2096671232, now seen corresponding path program 13 times [2020-10-12 16:19:15,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:15,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632657217] [2020-10-12 16:19:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:15,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:15,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:15,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:19:15,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:15,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-12 16:19:15,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:15,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:19:15,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:15,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:19:15,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:16,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:16,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:16,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:16,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:16,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:16,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:16,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:16,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:16,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:16,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:16,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:16,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632657217] [2020-10-12 16:19:16,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:16,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:19:16,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151262471] [2020-10-12 16:19:16,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:19:16,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:16,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:19:16,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:19:16,133 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 16 states. [2020-10-12 16:19:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:16,409 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2020-10-12 16:19:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:19:16,410 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-12 16:19:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:16,411 INFO L225 Difference]: With dead ends: 104 [2020-10-12 16:19:16,411 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 16:19:16,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:19:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 16:19:16,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-10-12 16:19:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 16:19:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-12 16:19:16,424 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 40 [2020-10-12 16:19:16,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:16,424 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-12 16:19:16,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:19:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-12 16:19:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 16:19:16,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:16,426 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:16,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:19:16,426 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:16,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:16,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1194359038, now seen corresponding path program 14 times [2020-10-12 16:19:16,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:16,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085466768] [2020-10-12 16:19:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:16,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:16,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:16,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:19:16,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:16,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-12 16:19:16,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:19:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:19:16,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:17,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:17,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:17,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:17,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:17,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:19:17,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:17,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:17,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:17,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:17,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:17,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085466768] [2020-10-12 16:19:17,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:17,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:19:17,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275141300] [2020-10-12 16:19:17,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:19:17,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:17,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:19:17,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:19:17,091 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 17 states. [2020-10-12 16:19:17,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:17,413 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2020-10-12 16:19:17,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:19:17,416 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-12 16:19:17,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:17,417 INFO L225 Difference]: With dead ends: 103 [2020-10-12 16:19:17,417 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 16:19:17,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:19:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 16:19:17,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-10-12 16:19:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 16:19:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-12 16:19:17,429 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 42 [2020-10-12 16:19:17,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:17,430 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-12 16:19:17,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:19:17,430 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-12 16:19:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 16:19:17,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:17,431 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:17,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:19:17,431 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:17,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:17,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1655734396, now seen corresponding path program 15 times [2020-10-12 16:19:17,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:17,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984569086] [2020-10-12 16:19:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:17,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:17,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 16:19:17,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:17,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-12 16:19:17,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:17,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:19:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:19:17,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:18,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:18,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:18,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:18,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:18,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:18,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:18,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:18,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:18,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:18,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:18,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984569086] [2020-10-12 16:19:18,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:18,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:19:18,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236029955] [2020-10-12 16:19:18,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:19:18,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:18,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:19:18,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:19:18,097 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 18 states. [2020-10-12 16:19:18,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:18,457 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2020-10-12 16:19:18,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:19:18,458 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-12 16:19:18,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:18,459 INFO L225 Difference]: With dead ends: 107 [2020-10-12 16:19:18,459 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 16:19:18,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:19:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 16:19:18,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-10-12 16:19:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 16:19:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-12 16:19:18,464 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 44 [2020-10-12 16:19:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:18,464 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-12 16:19:18,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:19:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-12 16:19:18,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 16:19:18,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:18,465 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:18,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:19:18,465 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:18,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1639145350, now seen corresponding path program 16 times [2020-10-12 16:19:18,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:18,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350248720] [2020-10-12 16:19:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:18,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:18,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 16:19:18,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:18,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-12 16:19:18,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:18,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:19:18,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:18,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:19:18,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:19,398 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 15 [2020-10-12 16:19:19,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:19,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:19,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:19,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:19,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:19,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:19,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:19,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:19,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:19,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:19,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:19,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350248720] [2020-10-12 16:19:19,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:19,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:19:19,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551312905] [2020-10-12 16:19:19,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:19:19,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:19,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:19:19,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:19:19,461 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 21 states. [2020-10-12 16:19:20,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:20,068 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-10-12 16:19:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:19:20,069 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-12 16:19:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:20,070 INFO L225 Difference]: With dead ends: 78 [2020-10-12 16:19:20,070 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 16:19:20,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:19:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 16:19:20,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2020-10-12 16:19:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 16:19:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-10-12 16:19:20,074 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 46 [2020-10-12 16:19:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:20,074 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-10-12 16:19:20,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:19:20,074 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-10-12 16:19:20,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 16:19:20,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:20,077 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:20,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:19:20,078 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:20,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:20,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1667283192, now seen corresponding path program 17 times [2020-10-12 16:19:20,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:20,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367728587] [2020-10-12 16:19:20,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:20,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:20,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 16:19:20,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:20,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-12 16:19:20,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:20,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:19:20,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:20,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 16:19:20,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:20,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:20,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:20,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:20,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:20,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:20,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:20,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:20,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:20,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:20,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:20,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367728587] [2020-10-12 16:19:20,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:20,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:19:20,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095757034] [2020-10-12 16:19:20,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:19:20,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:20,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:19:20,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:19:20,935 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 20 states. [2020-10-12 16:19:21,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:21,350 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2020-10-12 16:19:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:19:21,350 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-12 16:19:21,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:21,351 INFO L225 Difference]: With dead ends: 120 [2020-10-12 16:19:21,351 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 16:19:21,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:19:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 16:19:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2020-10-12 16:19:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 16:19:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-12 16:19:21,356 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 48 [2020-10-12 16:19:21,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:21,357 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-12 16:19:21,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:19:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-12 16:19:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 16:19:21,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:21,358 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:21,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:19:21,358 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:21,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:21,358 INFO L82 PathProgramCache]: Analyzing trace with hash 869313014, now seen corresponding path program 18 times [2020-10-12 16:19:21,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:21,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359044510] [2020-10-12 16:19:21,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:21,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:21,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:21,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:19:21,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:21,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-12 16:19:21,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:21,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:19:21,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:21,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 16:19:21,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:22,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:22,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:22,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:22,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:22,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:22,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:22,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:22,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:22,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:22,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:22,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:22,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359044510] [2020-10-12 16:19:22,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:22,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:19:22,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566175000] [2020-10-12 16:19:22,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:19:22,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:22,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:19:22,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:19:22,174 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 21 states. [2020-10-12 16:19:22,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:22,665 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2020-10-12 16:19:22,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:19:22,672 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-12 16:19:22,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:22,673 INFO L225 Difference]: With dead ends: 119 [2020-10-12 16:19:22,673 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 16:19:22,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:19:22,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 16:19:22,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2020-10-12 16:19:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 16:19:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-12 16:19:22,681 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 50 [2020-10-12 16:19:22,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:22,681 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-12 16:19:22,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:19:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-12 16:19:22,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 16:19:22,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:22,684 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:22,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:19:22,684 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:22,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:22,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1475849356, now seen corresponding path program 19 times [2020-10-12 16:19:22,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:22,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098036303] [2020-10-12 16:19:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:22,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:23,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 16:19:23,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:23,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-12 16:19:23,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:23,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:19:23,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:23,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 16:19:23,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:23,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:23,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:23,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:23,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:23,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:23,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:23,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:23,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:23,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:23,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:23,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098036303] [2020-10-12 16:19:23,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:23,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:19:23,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766296364] [2020-10-12 16:19:23,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:19:23,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:23,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:19:23,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:19:23,460 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 22 states. [2020-10-12 16:19:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:23,992 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-10-12 16:19:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:19:23,997 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-12 16:19:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:23,998 INFO L225 Difference]: With dead ends: 123 [2020-10-12 16:19:23,998 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 16:19:23,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:19:23,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 16:19:24,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-10-12 16:19:24,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 16:19:24,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-12 16:19:24,003 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 52 [2020-10-12 16:19:24,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:24,004 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-12 16:19:24,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:19:24,004 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-12 16:19:24,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 16:19:24,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:24,005 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:24,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:19:24,005 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:24,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:24,006 INFO L82 PathProgramCache]: Analyzing trace with hash -319056526, now seen corresponding path program 20 times [2020-10-12 16:19:24,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:24,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541833549] [2020-10-12 16:19:24,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:24,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:24,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:24,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:24,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 16:19:24,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:24,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 920 [2020-10-12 16:19:24,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:24,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:19:24,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:24,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:19:24,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:25,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:25,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:25,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:25,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:25,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:25,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:25,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:25,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:25,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:25,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:25,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:25,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541833549] [2020-10-12 16:19:25,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:25,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:19:25,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358794104] [2020-10-12 16:19:25,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:19:25,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:25,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:19:25,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:19:25,534 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 25 states. [2020-10-12 16:19:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:26,320 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2020-10-12 16:19:26,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:19:26,323 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-12 16:19:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:26,324 INFO L225 Difference]: With dead ends: 86 [2020-10-12 16:19:26,325 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 16:19:26,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:19:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 16:19:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2020-10-12 16:19:26,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 16:19:26,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2020-10-12 16:19:26,331 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 54 [2020-10-12 16:19:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:26,331 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2020-10-12 16:19:26,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:19:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2020-10-12 16:19:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 16:19:26,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:26,332 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:26,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:19:26,332 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:26,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1037676560, now seen corresponding path program 21 times [2020-10-12 16:19:26,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:26,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8420066] [2020-10-12 16:19:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:26,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:26,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:26,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 16:19:26,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:26,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-12 16:19:26,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:26,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:19:26,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:26,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 16:19:26,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:27,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:27,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:27,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:27,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:27,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:27,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:27,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:27,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:27,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:27,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:27,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:27,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8420066] [2020-10-12 16:19:27,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:27,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:19:27,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378011545] [2020-10-12 16:19:27,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:19:27,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:27,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:19:27,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:19:27,447 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 24 states. [2020-10-12 16:19:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:28,121 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-10-12 16:19:28,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:19:28,124 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-12 16:19:28,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:28,125 INFO L225 Difference]: With dead ends: 136 [2020-10-12 16:19:28,125 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 16:19:28,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:19:28,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 16:19:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2020-10-12 16:19:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 16:19:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-12 16:19:28,130 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 56 [2020-10-12 16:19:28,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:28,130 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-12 16:19:28,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:19:28,130 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-12 16:19:28,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 16:19:28,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:28,131 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:28,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:19:28,131 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:28,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:28,132 INFO L82 PathProgramCache]: Analyzing trace with hash -141794578, now seen corresponding path program 22 times [2020-10-12 16:19:28,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:28,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994475926] [2020-10-12 16:19:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:28,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:28,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:28,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 16:19:28,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:28,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-12 16:19:28,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:28,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:19:28,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:28,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 16:19:28,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:29,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:29,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:29,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:29,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:29,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:29,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:29,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:29,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:29,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:29,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:29,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:29,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994475926] [2020-10-12 16:19:29,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:29,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:19:29,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910051736] [2020-10-12 16:19:29,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:19:29,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:29,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:19:29,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:19:29,584 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 25 states. [2020-10-12 16:19:30,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:30,331 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2020-10-12 16:19:30,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:19:30,335 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-12 16:19:30,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:30,336 INFO L225 Difference]: With dead ends: 135 [2020-10-12 16:19:30,336 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 16:19:30,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:19:30,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 16:19:30,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-10-12 16:19:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 16:19:30,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-12 16:19:30,345 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 58 [2020-10-12 16:19:30,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:30,345 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-12 16:19:30,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:19:30,346 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-12 16:19:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 16:19:30,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:30,347 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:30,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:19:30,347 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:30,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1807330924, now seen corresponding path program 23 times [2020-10-12 16:19:30,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:30,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719400256] [2020-10-12 16:19:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:30,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:31,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:31,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 16:19:31,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:31,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-12 16:19:31,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:31,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:19:31,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:31,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 16:19:31,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:19:31,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:31,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:31,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:31,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:31,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:31,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:31,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:31,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:31,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:31,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:31,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:31,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719400256] [2020-10-12 16:19:31,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:31,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:19:31,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266016968] [2020-10-12 16:19:31,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:19:31,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:31,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:19:31,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:19:31,957 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 26 states. [2020-10-12 16:19:32,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:32,956 INFO L93 Difference]: Finished difference Result 139 states and 151 transitions. [2020-10-12 16:19:32,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:19:32,957 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-12 16:19:32,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:32,958 INFO L225 Difference]: With dead ends: 139 [2020-10-12 16:19:32,959 INFO L226 Difference]: Without dead ends: 77 [2020-10-12 16:19:32,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:19:32,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-12 16:19:32,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-10-12 16:19:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 16:19:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-12 16:19:32,969 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 60 [2020-10-12 16:19:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:32,970 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-12 16:19:32,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:19:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-12 16:19:32,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 16:19:32,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:32,971 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:32,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:19:32,974 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:32,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:32,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1983770006, now seen corresponding path program 24 times [2020-10-12 16:19:32,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:32,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250473740] [2020-10-12 16:19:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:33,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:33,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:34,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:34,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 16:19:34,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:34,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-10-12 16:19:34,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:34,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:19:34,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:34,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 16:19:34,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:34,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:34,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:34,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:34,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:34,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:34,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:34,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:34,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:34,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:34,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:34,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:34,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250473740] [2020-10-12 16:19:34,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:34,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:19:34,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985429093] [2020-10-12 16:19:34,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:19:34,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:34,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:19:34,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:19:34,832 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 29 states. [2020-10-12 16:19:35,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:35,866 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2020-10-12 16:19:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:19:35,869 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-12 16:19:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:35,870 INFO L225 Difference]: With dead ends: 94 [2020-10-12 16:19:35,870 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 16:19:35,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:19:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 16:19:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-10-12 16:19:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 16:19:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-10-12 16:19:35,877 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 62 [2020-10-12 16:19:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:35,877 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-10-12 16:19:35,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:19:35,877 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-10-12 16:19:35,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 16:19:35,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:35,878 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:35,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:19:35,878 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:35,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1195470568, now seen corresponding path program 25 times [2020-10-12 16:19:35,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:35,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768081988] [2020-10-12 16:19:35,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:35,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:36,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:36,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 16:19:36,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:36,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-10-12 16:19:36,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:36,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:19:36,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:36,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 16:19:36,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:37,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:37,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:37,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:37,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:37,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:37,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:37,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:37,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:37,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:37,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:37,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:37,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768081988] [2020-10-12 16:19:37,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:37,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:19:37,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221297843] [2020-10-12 16:19:37,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:19:37,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:37,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:19:37,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:19:37,204 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 28 states. [2020-10-12 16:19:38,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:38,088 INFO L93 Difference]: Finished difference Result 152 states and 166 transitions. [2020-10-12 16:19:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:19:38,091 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-12 16:19:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:38,092 INFO L225 Difference]: With dead ends: 152 [2020-10-12 16:19:38,092 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 16:19:38,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:19:38,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 16:19:38,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-10-12 16:19:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 16:19:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-12 16:19:38,097 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 64 [2020-10-12 16:19:38,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:38,098 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-12 16:19:38,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:19:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-12 16:19:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 16:19:38,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:38,099 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:38,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:19:38,099 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:38,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:38,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1571052570, now seen corresponding path program 26 times [2020-10-12 16:19:38,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:38,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051341837] [2020-10-12 16:19:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:38,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:38,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:38,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 16:19:38,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:38,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-10-12 16:19:38,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:38,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:19:38,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:38,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 16:19:38,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:39,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:39,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:39,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:39,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:39,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:39,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:39,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:39,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:39,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:39,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:39,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:39,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051341837] [2020-10-12 16:19:39,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:39,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:19:39,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805049949] [2020-10-12 16:19:39,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:19:39,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:39,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:19:39,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:19:39,618 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 29 states. [2020-10-12 16:19:40,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:40,548 INFO L93 Difference]: Finished difference Result 151 states and 163 transitions. [2020-10-12 16:19:40,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:19:40,549 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-12 16:19:40,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:40,550 INFO L225 Difference]: With dead ends: 151 [2020-10-12 16:19:40,550 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 16:19:40,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:19:40,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 16:19:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2020-10-12 16:19:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 16:19:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-12 16:19:40,555 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 66 [2020-10-12 16:19:40,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:40,558 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-12 16:19:40,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:19:40,558 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-12 16:19:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 16:19:40,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:40,559 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:40,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:19:40,559 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1615031964, now seen corresponding path program 27 times [2020-10-12 16:19:40,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:40,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557237067] [2020-10-12 16:19:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:40,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:41,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:41,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 16:19:41,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:41,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-10-12 16:19:41,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:41,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:19:41,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:41,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 16:19:41,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:42,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:42,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:42,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:42,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:42,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:42,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:42,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:42,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:42,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:42,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:42,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:42,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557237067] [2020-10-12 16:19:42,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:42,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:19:42,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30815294] [2020-10-12 16:19:42,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:19:42,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:42,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:19:42,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:19:42,022 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 30 states. [2020-10-12 16:19:43,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:43,069 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2020-10-12 16:19:43,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:19:43,070 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-12 16:19:43,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:43,071 INFO L225 Difference]: With dead ends: 155 [2020-10-12 16:19:43,071 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 16:19:43,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:19:43,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 16:19:43,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2020-10-12 16:19:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 16:19:43,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-12 16:19:43,078 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 68 [2020-10-12 16:19:43,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:43,078 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-12 16:19:43,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:19:43,078 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-12 16:19:43,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 16:19:43,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:43,079 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:43,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:19:43,080 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:43,080 INFO L82 PathProgramCache]: Analyzing trace with hash -929556638, now seen corresponding path program 28 times [2020-10-12 16:19:43,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:43,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798902619] [2020-10-12 16:19:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:43,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:43,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:43,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:43,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 16:19:43,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:43,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 857 [2020-10-12 16:19:43,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:19:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 16:19:43,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:48,621 WARN L193 SmtUtils]: Spent 3.90 s on a formula simplification. DAG size of input: 44 DAG size of output: 15 [2020-10-12 16:19:48,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:48,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:48,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:48,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:48,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:48,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:48,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:48,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:48,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:48,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:48,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:48,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798902619] [2020-10-12 16:19:48,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:48,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:19:48,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948285998] [2020-10-12 16:19:48,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:19:48,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:48,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:19:48,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:19:48,714 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 33 states. [2020-10-12 16:19:50,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:50,071 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2020-10-12 16:19:50,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:19:50,072 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-12 16:19:50,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:50,073 INFO L225 Difference]: With dead ends: 102 [2020-10-12 16:19:50,074 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 16:19:50,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:19:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 16:19:50,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2020-10-12 16:19:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 16:19:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-10-12 16:19:50,080 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 70 [2020-10-12 16:19:50,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:50,080 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-10-12 16:19:50,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:19:50,080 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-10-12 16:19:50,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 16:19:50,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:50,081 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:50,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:19:50,082 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:50,082 INFO L82 PathProgramCache]: Analyzing trace with hash 682235360, now seen corresponding path program 29 times [2020-10-12 16:19:50,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:50,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711375514] [2020-10-12 16:19:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:50,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:50,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:50,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 16:19:50,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:50,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-12 16:19:50,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:50,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:19:50,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:50,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 16:19:50,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:51,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:51,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:51,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:51,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:51,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:51,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:51,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:51,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:51,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:51,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:51,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:51,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711375514] [2020-10-12 16:19:51,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:51,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:19:51,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573768862] [2020-10-12 16:19:51,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:19:51,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:51,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:19:51,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:19:51,619 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 32 states. [2020-10-12 16:19:52,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:52,842 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2020-10-12 16:19:52,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:19:52,844 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-12 16:19:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:52,845 INFO L225 Difference]: With dead ends: 168 [2020-10-12 16:19:52,845 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 16:19:52,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:19:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 16:19:52,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-10-12 16:19:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 16:19:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-12 16:19:52,853 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 72 [2020-10-12 16:19:52,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:52,853 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-12 16:19:52,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:19:52,853 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-12 16:19:52,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 16:19:52,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:52,857 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:52,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:19:52,857 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:52,857 INFO L82 PathProgramCache]: Analyzing trace with hash -868848418, now seen corresponding path program 30 times [2020-10-12 16:19:52,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:52,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60478914] [2020-10-12 16:19:52,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:52,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:53,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:53,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 16:19:53,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:53,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 688 [2020-10-12 16:19:53,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:53,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:19:53,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:53,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 16:19:53,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:54,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:54,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:54,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:54,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:54,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:54,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:54,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:54,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:54,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:54,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:54,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:54,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60478914] [2020-10-12 16:19:54,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:54,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:19:54,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067805708] [2020-10-12 16:19:54,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:19:54,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:54,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:19:54,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:19:54,462 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 33 states. [2020-10-12 16:19:55,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:55,770 INFO L93 Difference]: Finished difference Result 167 states and 179 transitions. [2020-10-12 16:19:55,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:19:55,770 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-12 16:19:55,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:55,771 INFO L225 Difference]: With dead ends: 167 [2020-10-12 16:19:55,772 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 16:19:55,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:19:55,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 16:19:55,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-10-12 16:19:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 16:19:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-10-12 16:19:55,778 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 74 [2020-10-12 16:19:55,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:55,785 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-10-12 16:19:55,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:19:55,786 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-10-12 16:19:55,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 16:19:55,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:55,787 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:55,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:19:55,787 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:55,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:55,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1106707364, now seen corresponding path program 31 times [2020-10-12 16:19:55,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:55,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635991048] [2020-10-12 16:19:55,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:55,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:56,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:56,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 16:19:56,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:56,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 819 [2020-10-12 16:19:56,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:56,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:19:56,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:19:56,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 16:19:56,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:57,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:57,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:57,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:57,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:57,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:57,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:57,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:57,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:57,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:57,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:57,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:57,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635991048] [2020-10-12 16:19:57,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:57,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:19:57,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743996537] [2020-10-12 16:19:57,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:19:57,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:57,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:19:57,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:19:57,689 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 34 states. [2020-10-12 16:19:59,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:59,050 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2020-10-12 16:19:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:19:59,052 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-12 16:19:59,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:59,054 INFO L225 Difference]: With dead ends: 171 [2020-10-12 16:19:59,054 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 16:19:59,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:19:59,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 16:19:59,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2020-10-12 16:19:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 16:19:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-10-12 16:19:59,060 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 76 [2020-10-12 16:19:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:59,060 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-10-12 16:19:59,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:19:59,060 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-10-12 16:19:59,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 16:19:59,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:59,061 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:59,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:19:59,062 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:59,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:59,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2055887782, now seen corresponding path program 32 times [2020-10-12 16:19:59,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:59,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043741299] [2020-10-12 16:19:59,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:59,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:59,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:00,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:00,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 16:20:00,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:00,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-10-12 16:20:00,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:00,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:20:00,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:20:00,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 16:20:00,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:01,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:01,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:01,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:01,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:01,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:01,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:01,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:01,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:01,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:01,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:01,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:01,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043741299] [2020-10-12 16:20:01,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:01,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:20:01,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474153334] [2020-10-12 16:20:01,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:20:01,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:01,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:20:01,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:20:01,396 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 37 states. [2020-10-12 16:20:03,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:03,169 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2020-10-12 16:20:03,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 16:20:03,170 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-12 16:20:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:03,171 INFO L225 Difference]: With dead ends: 110 [2020-10-12 16:20:03,171 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 16:20:03,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:20:03,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 16:20:03,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 92. [2020-10-12 16:20:03,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 16:20:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2020-10-12 16:20:03,177 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 78 [2020-10-12 16:20:03,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:03,178 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2020-10-12 16:20:03,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:20:03,178 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2020-10-12 16:20:03,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 16:20:03,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:03,179 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:03,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:20:03,179 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:03,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:03,180 INFO L82 PathProgramCache]: Analyzing trace with hash 609764568, now seen corresponding path program 33 times [2020-10-12 16:20:03,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:03,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799856821] [2020-10-12 16:20:03,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:03,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:04,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:04,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 16:20:04,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:04,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 894 [2020-10-12 16:20:04,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:04,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:20:04,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:20:04,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 16:20:04,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:05,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:05,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:05,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:05,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:05,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:05,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:05,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:05,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:05,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799856821] [2020-10-12 16:20:05,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:05,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:20:05,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316667753] [2020-10-12 16:20:05,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:20:05,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:05,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:20:05,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:20:05,135 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand 36 states. [2020-10-12 16:20:06,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:06,705 INFO L93 Difference]: Finished difference Result 184 states and 198 transitions. [2020-10-12 16:20:06,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:20:06,705 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-12 16:20:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:06,706 INFO L225 Difference]: With dead ends: 184 [2020-10-12 16:20:06,706 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 16:20:06,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:20:06,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 16:20:06,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2020-10-12 16:20:06,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 16:20:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-10-12 16:20:06,718 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 80 [2020-10-12 16:20:06,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:06,719 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-10-12 16:20:06,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 16:20:06,719 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-10-12 16:20:06,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 16:20:06,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:06,720 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:06,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:20:06,720 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:06,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:06,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1793802794, now seen corresponding path program 34 times [2020-10-12 16:20:06,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:06,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250018759] [2020-10-12 16:20:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:06,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:07,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:07,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 16:20:07,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:07,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-12 16:20:07,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:20:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:20:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 16:20:07,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:08,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:08,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:08,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:08,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:08,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:08,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:08,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:08,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:08,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:08,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:08,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:08,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250018759] [2020-10-12 16:20:08,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:08,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:20:08,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114788006] [2020-10-12 16:20:08,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:20:08,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:08,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:20:08,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:20:08,582 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 37 states. [2020-10-12 16:20:10,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:10,237 INFO L93 Difference]: Finished difference Result 183 states and 195 transitions. [2020-10-12 16:20:10,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:20:10,238 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-12 16:20:10,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:10,239 INFO L225 Difference]: With dead ends: 183 [2020-10-12 16:20:10,239 INFO L226 Difference]: Without dead ends: 99 [2020-10-12 16:20:10,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:20:10,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-12 16:20:10,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2020-10-12 16:20:10,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 16:20:10,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-10-12 16:20:10,246 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 82 [2020-10-12 16:20:10,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:10,247 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-10-12 16:20:10,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:20:10,247 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-10-12 16:20:10,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 16:20:10,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:10,248 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:10,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:20:10,248 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:10,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:10,249 INFO L82 PathProgramCache]: Analyzing trace with hash -929632428, now seen corresponding path program 35 times [2020-10-12 16:20:10,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:10,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948372266] [2020-10-12 16:20:10,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:10,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:11,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:11,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 16:20:11,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:11,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 892 [2020-10-12 16:20:11,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:11,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:20:11,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:20:11,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 16:20:11,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:12,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:12,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:12,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:12,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:12,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:12,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:12,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:12,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:12,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:12,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:12,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:12,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948372266] [2020-10-12 16:20:12,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:12,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:20:12,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964633464] [2020-10-12 16:20:12,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:20:12,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:12,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:20:12,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:20:12,305 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 38 states. [2020-10-12 16:20:14,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:14,088 INFO L93 Difference]: Finished difference Result 187 states and 199 transitions. [2020-10-12 16:20:14,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 16:20:14,089 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-12 16:20:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:14,090 INFO L225 Difference]: With dead ends: 187 [2020-10-12 16:20:14,090 INFO L226 Difference]: Without dead ends: 101 [2020-10-12 16:20:14,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:20:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-12 16:20:14,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2020-10-12 16:20:14,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 16:20:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-12 16:20:14,097 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 84 [2020-10-12 16:20:14,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:14,098 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-12 16:20:14,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:20:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-12 16:20:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 16:20:14,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:14,099 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:14,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:20:14,099 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:14,100 INFO L82 PathProgramCache]: Analyzing trace with hash 609401170, now seen corresponding path program 36 times [2020-10-12 16:20:14,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:14,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411950143] [2020-10-12 16:20:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:14,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:14,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:15,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:15,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 16:20:15,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:15,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1528 [2020-10-12 16:20:15,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:15,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:20:15,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:20:15,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-12 16:20:15,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:22,948 WARN L193 SmtUtils]: Spent 6.01 s on a formula simplification. DAG size of input: 44 DAG size of output: 15 [2020-10-12 16:20:23,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:23,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:23,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:23,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:23,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:23,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:23,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:23,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:23,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:23,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:23,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:23,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411950143] [2020-10-12 16:20:23,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:23,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:20:23,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208383045] [2020-10-12 16:20:23,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:20:23,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:23,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:20:23,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:20:23,069 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 41 states. [2020-10-12 16:20:25,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:25,273 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2020-10-12 16:20:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:20:25,277 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-12 16:20:25,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:25,278 INFO L225 Difference]: With dead ends: 118 [2020-10-12 16:20:25,278 INFO L226 Difference]: Without dead ends: 116 [2020-10-12 16:20:25,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:20:25,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-12 16:20:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 100. [2020-10-12 16:20:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-12 16:20:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-10-12 16:20:25,285 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 86 [2020-10-12 16:20:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:25,286 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-10-12 16:20:25,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:20:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-10-12 16:20:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 16:20:25,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:25,294 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:25,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:20:25,294 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:25,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:25,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2143028272, now seen corresponding path program 37 times [2020-10-12 16:20:25,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:25,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795893537] [2020-10-12 16:20:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:25,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:26,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:26,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 16:20:26,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:26,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 800 [2020-10-12 16:20:26,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:26,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:20:26,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:20:26,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 16:20:26,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:27,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:27,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:27,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:27,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:27,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:27,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:27,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:27,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:27,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:27,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795893537] [2020-10-12 16:20:27,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:27,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 16:20:27,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450523103] [2020-10-12 16:20:27,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 16:20:27,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:27,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 16:20:27,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:20:27,389 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 40 states. [2020-10-12 16:20:29,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:29,386 INFO L93 Difference]: Finished difference Result 200 states and 214 transitions. [2020-10-12 16:20:29,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 16:20:29,387 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-12 16:20:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:29,388 INFO L225 Difference]: With dead ends: 200 [2020-10-12 16:20:29,388 INFO L226 Difference]: Without dead ends: 105 [2020-10-12 16:20:29,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:20:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-12 16:20:29,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-10-12 16:20:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 16:20:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-10-12 16:20:29,395 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 88 [2020-10-12 16:20:29,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:29,395 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-10-12 16:20:29,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 16:20:29,396 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-10-12 16:20:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 16:20:29,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:29,397 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:29,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:20:29,397 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:29,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1527867698, now seen corresponding path program 38 times [2020-10-12 16:20:29,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:29,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488645996] [2020-10-12 16:20:29,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:29,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:30,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:30,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 16:20:30,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:30,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 891 [2020-10-12 16:20:30,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:30,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:20:30,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:20:30,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 16:20:30,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:31,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:31,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:31,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:31,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:31,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:31,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:31,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:31,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:31,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:31,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:31,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:31,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488645996] [2020-10-12 16:20:31,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:31,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:20:31,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024780509] [2020-10-12 16:20:31,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:20:31,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:31,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:20:31,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:20:31,630 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 41 states. [2020-10-12 16:20:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:33,746 INFO L93 Difference]: Finished difference Result 199 states and 211 transitions. [2020-10-12 16:20:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:20:33,751 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-12 16:20:33,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:33,752 INFO L225 Difference]: With dead ends: 199 [2020-10-12 16:20:33,752 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 16:20:33,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:20:33,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 16:20:33,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2020-10-12 16:20:33,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 16:20:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-10-12 16:20:33,758 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 90 [2020-10-12 16:20:33,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:33,759 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-10-12 16:20:33,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:20:33,759 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-10-12 16:20:33,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-12 16:20:33,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:33,760 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:33,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:20:33,760 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:33,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1230924364, now seen corresponding path program 39 times [2020-10-12 16:20:33,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:33,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149626809] [2020-10-12 16:20:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:33,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:34,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:34,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 16:20:34,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:34,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1117 [2020-10-12 16:20:34,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:34,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:20:34,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:20:34,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 16:20:34,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:36,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:36,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:36,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:36,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:36,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:36,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:36,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:36,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:36,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:36,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:36,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:36,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149626809] [2020-10-12 16:20:36,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:36,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:20:36,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147138773] [2020-10-12 16:20:36,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:20:36,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:36,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:20:36,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:20:36,270 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 42 states. [2020-10-12 16:20:38,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:38,511 INFO L93 Difference]: Finished difference Result 203 states and 215 transitions. [2020-10-12 16:20:38,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:20:38,511 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-12 16:20:38,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:38,513 INFO L225 Difference]: With dead ends: 203 [2020-10-12 16:20:38,513 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 16:20:38,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:20:38,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 16:20:38,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-10-12 16:20:38,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 16:20:38,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-12 16:20:38,519 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2020-10-12 16:20:38,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:38,519 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-12 16:20:38,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:20:38,520 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-12 16:20:38,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 16:20:38,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:38,521 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:38,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:20:38,521 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:38,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1859692982, now seen corresponding path program 40 times [2020-10-12 16:20:38,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:38,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891645218] [2020-10-12 16:20:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:38,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:39,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:40,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:40,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 16:20:40,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:40,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2317 [2020-10-12 16:20:40,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:40,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:20:40,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:20:40,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 16:20:40,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:42,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:42,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:42,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:42,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:42,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:42,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:42,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:42,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:42,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:42,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:42,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:42,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891645218] [2020-10-12 16:20:42,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:42,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:20:42,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303379612] [2020-10-12 16:20:42,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:20:42,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:42,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:20:42,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:20:42,536 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 45 states. [2020-10-12 16:20:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:45,149 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2020-10-12 16:20:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:20:45,150 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-10-12 16:20:45,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:45,150 INFO L225 Difference]: With dead ends: 126 [2020-10-12 16:20:45,151 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 16:20:45,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:20:45,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 16:20:45,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 108. [2020-10-12 16:20:45,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-12 16:20:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-10-12 16:20:45,157 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 94 [2020-10-12 16:20:45,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:45,157 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-10-12 16:20:45,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:20:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-10-12 16:20:45,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 16:20:45,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:45,158 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:45,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:20:45,159 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:45,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:45,159 INFO L82 PathProgramCache]: Analyzing trace with hash 174406344, now seen corresponding path program 41 times [2020-10-12 16:20:45,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:45,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801914609] [2020-10-12 16:20:45,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:45,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:46,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:46,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 16:20:46,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:46,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1534 [2020-10-12 16:20:46,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:46,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:20:46,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:20:46,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 16:20:46,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:48,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:48,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:48,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:48,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:48,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:48,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:20:48,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:48,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:48,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:48,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:48,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:48,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801914609] [2020-10-12 16:20:48,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:48,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 16:20:48,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22852455] [2020-10-12 16:20:48,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 16:20:48,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:48,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 16:20:48,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:20:48,200 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 44 states. [2020-10-12 16:20:50,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:50,603 INFO L93 Difference]: Finished difference Result 216 states and 230 transitions. [2020-10-12 16:20:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 16:20:50,603 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-12 16:20:50,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:50,604 INFO L225 Difference]: With dead ends: 216 [2020-10-12 16:20:50,604 INFO L226 Difference]: Without dead ends: 113 [2020-10-12 16:20:50,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:20:50,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-12 16:20:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2020-10-12 16:20:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-12 16:20:50,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-12 16:20:50,611 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 96 [2020-10-12 16:20:50,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:50,612 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-12 16:20:50,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 16:20:50,612 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-12 16:20:50,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 16:20:50,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:50,613 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:50,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:20:50,614 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:50,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:50,614 INFO L82 PathProgramCache]: Analyzing trace with hash 733738950, now seen corresponding path program 42 times [2020-10-12 16:20:50,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:50,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434189236] [2020-10-12 16:20:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:50,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:51,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:51,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 16:20:51,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:51,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1351 [2020-10-12 16:20:51,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:51,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:20:51,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:20:51,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-12 16:20:51,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:53,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:53,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:53,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:53,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:53,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:53,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:53,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:53,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:53,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:53,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:53,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:53,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434189236] [2020-10-12 16:20:53,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:53,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:20:53,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420649163] [2020-10-12 16:20:53,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:20:53,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:53,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:20:53,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:20:53,595 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 45 states. [2020-10-12 16:20:56,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:56,167 INFO L93 Difference]: Finished difference Result 215 states and 227 transitions. [2020-10-12 16:20:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:20:56,167 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-12 16:20:56,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:56,168 INFO L225 Difference]: With dead ends: 215 [2020-10-12 16:20:56,168 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 16:20:56,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:20:56,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 16:20:56,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2020-10-12 16:20:56,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 16:20:56,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-10-12 16:20:56,176 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 98 [2020-10-12 16:20:56,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:56,176 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-10-12 16:20:56,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:20:56,177 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-10-12 16:20:56,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-12 16:20:56,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:56,177 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:56,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:20:56,178 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:56,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:56,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1381461316, now seen corresponding path program 43 times [2020-10-12 16:20:56,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:56,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632472522] [2020-10-12 16:20:56,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:56,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:57,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:57,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-12 16:20:57,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:57,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1700 [2020-10-12 16:20:57,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:57,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:20:57,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:20:57,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-12 16:20:57,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:59,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:59,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:59,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:59,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:59,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:59,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:59,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:59,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:59,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:59,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:59,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:59,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632472522] [2020-10-12 16:20:59,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:59,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 16:20:59,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541457065] [2020-10-12 16:20:59,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 16:20:59,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:59,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 16:20:59,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:20:59,571 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 46 states. [2020-10-12 16:21:02,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:02,202 INFO L93 Difference]: Finished difference Result 219 states and 231 transitions. [2020-10-12 16:21:02,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 16:21:02,203 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-12 16:21:02,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:02,204 INFO L225 Difference]: With dead ends: 219 [2020-10-12 16:21:02,205 INFO L226 Difference]: Without dead ends: 117 [2020-10-12 16:21:02,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:21:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-12 16:21:02,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2020-10-12 16:21:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 16:21:02,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-10-12 16:21:02,210 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 100 [2020-10-12 16:21:02,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:02,210 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-10-12 16:21:02,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 16:21:02,210 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-10-12 16:21:02,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-12 16:21:02,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:02,211 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:02,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:21:02,211 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:02,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:02,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1072397122, now seen corresponding path program 44 times [2020-10-12 16:21:02,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:02,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490237182] [2020-10-12 16:21:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:02,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:04,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:04,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:04,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-12 16:21:04,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:04,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2174 [2020-10-12 16:21:04,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:04,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 16:21:04,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:04,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-12 16:21:04,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:10,245 WARN L193 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2020-10-12 16:21:10,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:10,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:10,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:10,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:21:10,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:10,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:10,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:10,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:10,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:10,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:10,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:10,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490237182] [2020-10-12 16:21:10,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:10,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:21:10,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532151855] [2020-10-12 16:21:10,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:21:10,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:10,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:21:10,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:21:10,396 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 49 states. [2020-10-12 16:21:13,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:13,523 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2020-10-12 16:21:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:21:13,524 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-10-12 16:21:13,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:13,525 INFO L225 Difference]: With dead ends: 134 [2020-10-12 16:21:13,525 INFO L226 Difference]: Without dead ends: 132 [2020-10-12 16:21:13,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:21:13,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-12 16:21:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 116. [2020-10-12 16:21:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-12 16:21:13,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2020-10-12 16:21:13,531 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 102 [2020-10-12 16:21:13,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:13,532 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2020-10-12 16:21:13,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:21:13,532 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2020-10-12 16:21:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-12 16:21:13,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:13,533 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:13,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:21:13,533 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:13,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:13,534 INFO L82 PathProgramCache]: Analyzing trace with hash 414450112, now seen corresponding path program 45 times [2020-10-12 16:21:13,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:13,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593907885] [2020-10-12 16:21:13,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:13,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:15,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:15,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-12 16:21:15,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:15,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1697 [2020-10-12 16:21:15,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:15,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:21:15,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:15,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-12 16:21:15,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:17,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:17,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:17,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:17,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:21:17,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:17,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:21:17,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:17,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:17,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:17,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:17,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:17,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593907885] [2020-10-12 16:21:17,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:17,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:21:17,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007198011] [2020-10-12 16:21:17,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:21:17,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:17,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:21:17,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:21:17,064 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand 48 states. [2020-10-12 16:21:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:20,038 INFO L93 Difference]: Finished difference Result 232 states and 246 transitions. [2020-10-12 16:21:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:21:20,038 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-12 16:21:20,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:20,039 INFO L225 Difference]: With dead ends: 232 [2020-10-12 16:21:20,040 INFO L226 Difference]: Without dead ends: 121 [2020-10-12 16:21:20,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:21:20,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-12 16:21:20,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 113. [2020-10-12 16:21:20,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 16:21:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2020-10-12 16:21:20,046 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 104 [2020-10-12 16:21:20,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:20,047 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2020-10-12 16:21:20,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:21:20,047 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2020-10-12 16:21:20,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-12 16:21:20,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:20,048 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:20,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:21:20,048 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:20,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:20,049 INFO L82 PathProgramCache]: Analyzing trace with hash -512433986, now seen corresponding path program 46 times [2020-10-12 16:21:20,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:20,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394580745] [2020-10-12 16:21:20,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:20,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:21,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:21,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 16:21:21,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:21,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1792 [2020-10-12 16:21:21,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 16:21:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 16:21:21,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:23,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:23,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:23,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:23,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:21:23,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:23,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:21:23,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:23,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:23,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:23,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:23,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:23,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394580745] [2020-10-12 16:21:23,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:23,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:21:23,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655300811] [2020-10-12 16:21:23,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:21:23,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:23,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:21:23,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:21:23,757 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 49 states. [2020-10-12 16:21:26,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:26,633 INFO L93 Difference]: Finished difference Result 231 states and 243 transitions. [2020-10-12 16:21:26,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:21:26,636 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-12 16:21:26,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:26,637 INFO L225 Difference]: With dead ends: 231 [2020-10-12 16:21:26,637 INFO L226 Difference]: Without dead ends: 123 [2020-10-12 16:21:26,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:21:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-12 16:21:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 115. [2020-10-12 16:21:26,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 16:21:26,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2020-10-12 16:21:26,643 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 106 [2020-10-12 16:21:26,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:26,644 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2020-10-12 16:21:26,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:21:26,644 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2020-10-12 16:21:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 16:21:26,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:26,645 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:26,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:21:26,645 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:26,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:26,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2105145404, now seen corresponding path program 47 times [2020-10-12 16:21:26,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:26,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896293641] [2020-10-12 16:21:26,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:26,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:28,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:28,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-12 16:21:28,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:28,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1584 [2020-10-12 16:21:28,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:28,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 16:21:28,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:28,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-12 16:21:28,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:30,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:30,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:30,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:30,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:21:30,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:30,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:21:30,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:30,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:30,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:30,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896293641] [2020-10-12 16:21:30,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:30,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 16:21:30,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33635078] [2020-10-12 16:21:30,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 16:21:30,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:30,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 16:21:30,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:21:30,227 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 50 states. [2020-10-12 16:21:33,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:33,353 INFO L93 Difference]: Finished difference Result 235 states and 247 transitions. [2020-10-12 16:21:33,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 16:21:33,359 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-12 16:21:33,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:33,360 INFO L225 Difference]: With dead ends: 235 [2020-10-12 16:21:33,360 INFO L226 Difference]: Without dead ends: 125 [2020-10-12 16:21:33,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:21:33,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-12 16:21:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2020-10-12 16:21:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-12 16:21:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-10-12 16:21:33,369 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 108 [2020-10-12 16:21:33,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:33,369 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-10-12 16:21:33,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 16:21:33,369 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-10-12 16:21:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-12 16:21:33,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:33,370 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:33,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:21:33,370 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:33,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:33,371 INFO L82 PathProgramCache]: Analyzing trace with hash 748103738, now seen corresponding path program 48 times [2020-10-12 16:21:33,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:33,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581177158] [2020-10-12 16:21:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:33,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:34,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:35,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:35,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 16:21:35,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:35,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2380 [2020-10-12 16:21:35,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:35,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 16:21:35,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:35,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-12 16:21:35,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:46,139 WARN L193 SmtUtils]: Spent 8.28 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2020-10-12 16:21:46,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:46,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:46,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:46,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:21:46,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:46,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:21:46,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:46,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:46,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:46,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581177158] [2020-10-12 16:21:46,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:46,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 16:21:46,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236941718] [2020-10-12 16:21:46,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 16:21:46,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:46,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 16:21:46,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:21:46,294 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 53 states. [2020-10-12 16:21:49,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:49,728 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2020-10-12 16:21:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 16:21:49,728 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 110 [2020-10-12 16:21:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:49,729 INFO L225 Difference]: With dead ends: 142 [2020-10-12 16:21:49,729 INFO L226 Difference]: Without dead ends: 140 [2020-10-12 16:21:49,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:21:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-12 16:21:49,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 124. [2020-10-12 16:21:49,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-12 16:21:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2020-10-12 16:21:49,735 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 110 [2020-10-12 16:21:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:49,736 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2020-10-12 16:21:49,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 16:21:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2020-10-12 16:21:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-12 16:21:49,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:49,736 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:49,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:21:49,737 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:49,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:49,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1993846600, now seen corresponding path program 49 times [2020-10-12 16:21:49,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:49,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397967823] [2020-10-12 16:21:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:49,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:52,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:52,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-12 16:21:52,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:52,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2257 [2020-10-12 16:21:52,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:52,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 16:21:52,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:52,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-12 16:21:52,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:54,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:54,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:54,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:54,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:21:54,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:54,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:21:54,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:54,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:54,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:54,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:54,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:54,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397967823] [2020-10-12 16:21:54,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:54,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 16:21:54,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369155664] [2020-10-12 16:21:54,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 16:21:54,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:54,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 16:21:54,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:21:54,150 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand 52 states. [2020-10-12 16:21:57,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:57,339 INFO L93 Difference]: Finished difference Result 248 states and 262 transitions. [2020-10-12 16:21:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 16:21:57,340 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-12 16:21:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:57,341 INFO L225 Difference]: With dead ends: 248 [2020-10-12 16:21:57,342 INFO L226 Difference]: Without dead ends: 129 [2020-10-12 16:21:57,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:21:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-12 16:21:57,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2020-10-12 16:21:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-12 16:21:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2020-10-12 16:21:57,351 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 112 [2020-10-12 16:21:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:57,352 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2020-10-12 16:21:57,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 16:21:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2020-10-12 16:21:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 16:21:57,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:57,353 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:57,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:21:57,353 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:57,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:57,354 INFO L82 PathProgramCache]: Analyzing trace with hash 101798326, now seen corresponding path program 50 times [2020-10-12 16:21:57,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:57,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959857102] [2020-10-12 16:21:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:57,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:59,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:59,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 16:21:59,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:59,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2429 [2020-10-12 16:21:59,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:59,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 16:21:59,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:21:59,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 16:21:59,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:02,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:02,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:02,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:02,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:02,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:02,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:22:02,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:02,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:02,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:02,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:02,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:02,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959857102] [2020-10-12 16:22:02,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:02,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 16:22:02,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228853945] [2020-10-12 16:22:02,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 16:22:02,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:02,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 16:22:02,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:22:02,079 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand 53 states. [2020-10-12 16:22:05,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:05,396 INFO L93 Difference]: Finished difference Result 247 states and 259 transitions. [2020-10-12 16:22:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 16:22:05,399 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2020-10-12 16:22:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:05,401 INFO L225 Difference]: With dead ends: 247 [2020-10-12 16:22:05,401 INFO L226 Difference]: Without dead ends: 131 [2020-10-12 16:22:05,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:22:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-12 16:22:05,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 123. [2020-10-12 16:22:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-12 16:22:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2020-10-12 16:22:05,408 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 114 [2020-10-12 16:22:05,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:05,408 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2020-10-12 16:22:05,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 16:22:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2020-10-12 16:22:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 16:22:05,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:05,409 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:05,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:22:05,410 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:05,410 INFO L82 PathProgramCache]: Analyzing trace with hash -323089612, now seen corresponding path program 51 times [2020-10-12 16:22:05,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:05,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871794148] [2020-10-12 16:22:05,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:05,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:08,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:08,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 16:22:08,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:08,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2717 [2020-10-12 16:22:08,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:08,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 16:22:08,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:08,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-12 16:22:08,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:10,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:10,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:10,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:10,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:10,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:10,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:22:10,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:10,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:10,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:10,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:10,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:10,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871794148] [2020-10-12 16:22:10,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:10,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 16:22:10,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579932667] [2020-10-12 16:22:10,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 16:22:10,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:10,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 16:22:10,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:22:10,464 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand 54 states. [2020-10-12 16:22:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:14,002 INFO L93 Difference]: Finished difference Result 251 states and 263 transitions. [2020-10-12 16:22:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 16:22:14,004 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 116 [2020-10-12 16:22:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:14,005 INFO L225 Difference]: With dead ends: 251 [2020-10-12 16:22:14,005 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 16:22:14,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:22:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 16:22:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2020-10-12 16:22:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-12 16:22:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2020-10-12 16:22:14,012 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 116 [2020-10-12 16:22:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:14,012 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2020-10-12 16:22:14,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 16:22:14,012 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2020-10-12 16:22:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 16:22:14,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:14,013 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:14,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:22:14,013 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:14,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:14,014 INFO L82 PathProgramCache]: Analyzing trace with hash -618504910, now seen corresponding path program 52 times [2020-10-12 16:22:14,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:14,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232845780] [2020-10-12 16:22:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:14,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:15,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:17,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:17,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-12 16:22:17,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:17,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3910 [2020-10-12 16:22:17,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:17,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 16:22:17,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:17,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-12 16:22:17,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:20,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:20,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:20,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:20,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:20,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:20,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:22:20,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:20,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:20,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:20,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:20,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:20,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232845780] [2020-10-12 16:22:20,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:20,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 16:22:20,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111830806] [2020-10-12 16:22:20,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 16:22:20,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:20,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 16:22:20,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3068, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:22:20,510 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand 57 states. [2020-10-12 16:22:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:24,328 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2020-10-12 16:22:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 16:22:24,329 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 118 [2020-10-12 16:22:24,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:24,330 INFO L225 Difference]: With dead ends: 150 [2020-10-12 16:22:24,330 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 16:22:24,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=128, Invalid=3178, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:22:24,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 16:22:24,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 132. [2020-10-12 16:22:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-12 16:22:24,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-10-12 16:22:24,335 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 118 [2020-10-12 16:22:24,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:24,335 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-10-12 16:22:24,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 16:22:24,335 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-10-12 16:22:24,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-12 16:22:24,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:24,336 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:24,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:22:24,336 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:24,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:24,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1044764752, now seen corresponding path program 53 times [2020-10-12 16:22:24,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:24,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541925319] [2020-10-12 16:22:24,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:24,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:26,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:26,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-12 16:22:26,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:26,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2325 [2020-10-12 16:22:26,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:26,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 16:22:26,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:26,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-12 16:22:26,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:29,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:29,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:29,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:29,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:29,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:29,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:22:29,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:29,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:29,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:29,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:29,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:29,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541925319] [2020-10-12 16:22:29,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:29,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-12 16:22:29,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953817457] [2020-10-12 16:22:29,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-12 16:22:29,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:29,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-12 16:22:29,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:22:29,175 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 56 states. [2020-10-12 16:22:32,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:32,823 INFO L93 Difference]: Finished difference Result 264 states and 278 transitions. [2020-10-12 16:22:32,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 16:22:32,824 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 120 [2020-10-12 16:22:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:32,825 INFO L225 Difference]: With dead ends: 264 [2020-10-12 16:22:32,825 INFO L226 Difference]: Without dead ends: 137 [2020-10-12 16:22:32,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:22:32,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-12 16:22:32,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 129. [2020-10-12 16:22:32,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 16:22:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2020-10-12 16:22:32,832 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 120 [2020-10-12 16:22:32,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:32,833 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2020-10-12 16:22:32,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-12 16:22:32,833 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2020-10-12 16:22:32,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-12 16:22:32,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:32,834 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:32,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:22:32,834 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:32,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:32,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1636387502, now seen corresponding path program 54 times [2020-10-12 16:22:32,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:32,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071567880] [2020-10-12 16:22:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:32,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:36,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:36,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 16:22:36,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:36,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3563 [2020-10-12 16:22:36,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:36,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 16:22:36,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:36,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-12 16:22:36,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:38,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:39,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:39,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:39,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:39,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:39,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:22:39,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:39,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:39,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:39,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:39,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:39,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071567880] [2020-10-12 16:22:39,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:39,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 16:22:39,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909910472] [2020-10-12 16:22:39,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 16:22:39,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:39,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 16:22:39,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:22:39,033 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 57 states. [2020-10-12 16:22:42,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:42,735 INFO L93 Difference]: Finished difference Result 263 states and 275 transitions. [2020-10-12 16:22:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 16:22:42,741 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 122 [2020-10-12 16:22:42,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:42,742 INFO L225 Difference]: With dead ends: 263 [2020-10-12 16:22:42,742 INFO L226 Difference]: Without dead ends: 139 [2020-10-12 16:22:42,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:22:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-12 16:22:42,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2020-10-12 16:22:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 16:22:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2020-10-12 16:22:42,749 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 122 [2020-10-12 16:22:42,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:42,749 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2020-10-12 16:22:42,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 16:22:42,750 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2020-10-12 16:22:42,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-12 16:22:42,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:42,751 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:42,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:22:42,751 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:42,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:42,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1243325996, now seen corresponding path program 55 times [2020-10-12 16:22:42,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:42,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383330655] [2020-10-12 16:22:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:42,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:45,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:45,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-12 16:22:45,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:45,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3076 [2020-10-12 16:22:45,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:45,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-12 16:22:45,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:22:45,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-12 16:22:45,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:48,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:48,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:48,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:48,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:48,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:48,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:22:48,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:48,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:48,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:48,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:48,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:48,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383330655] [2020-10-12 16:22:48,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:48,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-12 16:22:48,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274085777] [2020-10-12 16:22:48,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-12 16:22:48,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:48,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-12 16:22:48,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:22:48,529 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand 58 states. [2020-10-12 16:22:52,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:52,438 INFO L93 Difference]: Finished difference Result 267 states and 279 transitions. [2020-10-12 16:22:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 16:22:52,438 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 124 [2020-10-12 16:22:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:52,439 INFO L225 Difference]: With dead ends: 267 [2020-10-12 16:22:52,439 INFO L226 Difference]: Without dead ends: 141 [2020-10-12 16:22:52,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:22:52,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-12 16:22:52,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2020-10-12 16:22:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-12 16:22:52,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2020-10-12 16:22:52,445 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 124 [2020-10-12 16:22:52,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:52,445 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2020-10-12 16:22:52,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-12 16:22:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2020-10-12 16:22:52,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 16:22:52,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:52,446 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:52,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:22:52,446 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:52,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:52,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1468340778, now seen corresponding path program 56 times [2020-10-12 16:22:52,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:52,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264860743] [2020-10-12 16:22:52,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:52,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:56,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking...