/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 --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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:32:44,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:32:44,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:32:44,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:32:44,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:32:44,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:32:44,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:32:44,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:32:44,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:32:44,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:32:44,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:32:44,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:32:44,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:32:44,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:32:44,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:32:44,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:32:44,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:32:44,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:32:44,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:32:44,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:32:44,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:32:44,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:32:44,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:32:44,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:32:44,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:32:44,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:32:44,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:32:44,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:32:44,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:32:44,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:32:44,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:32:44,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:32:44,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:32:44,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:32:44,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:32:44,619 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:32:44,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:32:44,620 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:32:44,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:32:44,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:32:44,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:32:44,623 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 [2020-09-21 11:32:44,648 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:32:44,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:32:44,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:32:44,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:32:44,650 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:32:44,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:32:44,650 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:32:44,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:32:44,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:32:44,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:32:44,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:32:44,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:32:44,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:32:44,652 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:32:44,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:32:44,652 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:32:44,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:32:44,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:32:44,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:32:44,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:32:44,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:32:44,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:32:44,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:32:44,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:32:44,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:32:44,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:32:44,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:32:44,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:32:44,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:32:44,655 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.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;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:32:45,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:32:45,135 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:32:45,140 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:32:45,142 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:32:45,142 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:32:45,143 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-09-21 11:32:45,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10bc27443/faa531e2de2e474fa9671b209d8d8de1/FLAG7817c029c [2020-09-21 11:32:45,767 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:32:45,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-09-21 11:32:45,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10bc27443/faa531e2de2e474fa9671b209d8d8de1/FLAG7817c029c [2020-09-21 11:32:46,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10bc27443/faa531e2de2e474fa9671b209d8d8de1 [2020-09-21 11:32:46,108 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:32:46,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:32:46,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:46,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:32:46,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:32:46,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:46" (1/1) ... [2020-09-21 11:32:46,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30fa97df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:46, skipping insertion in model container [2020-09-21 11:32:46,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:46" (1/1) ... [2020-09-21 11:32:46,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:32:46,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:32:46,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:46,375 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:32:46,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:46,409 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:32:46,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:46 WrapperNode [2020-09-21 11:32:46,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:46,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:32:46,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:32:46,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:32:46,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:46" (1/1) ... [2020-09-21 11:32:46,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:46" (1/1) ... [2020-09-21 11:32:46,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:46" (1/1) ... [2020-09-21 11:32:46,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:46" (1/1) ... [2020-09-21 11:32:46,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:46" (1/1) ... [2020-09-21 11:32:46,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:46" (1/1) ... [2020-09-21 11:32:46,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:46" (1/1) ... [2020-09-21 11:32:46,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:32:46,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:32:46,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:32:46,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:32:46,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:46" (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 [2020-09-21 11:32:46,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:32:46,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:32:46,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:32:46,601 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:32:46,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:32:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:32:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:32:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:32:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:32:46,818 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:32:46,818 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:32:46,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:46 BoogieIcfgContainer [2020-09-21 11:32:46,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:32:46,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:32:46,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:32:46,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:32:46,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:32:46" (1/3) ... [2020-09-21 11:32:46,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18763a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:46, skipping insertion in model container [2020-09-21 11:32:46,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:46" (2/3) ... [2020-09-21 11:32:46,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18763a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:46, skipping insertion in model container [2020-09-21 11:32:46,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:46" (3/3) ... [2020-09-21 11:32:46,846 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_12.c [2020-09-21 11:32:46,872 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:32:46,882 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:32:46,912 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:32:46,950 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:32:46,950 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:32:46,951 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:32:46,951 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:32:46,951 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:32:46,952 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:32:46,952 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:32:46,952 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:32:46,977 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-21 11:32:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 11:32:46,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:46,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:46,989 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:46,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:46,996 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2020-09-21 11:32:47,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:47,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638147615] [2020-09-21 11:32:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:47,130 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:47,130 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:47,130 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:47,131 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:47,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:32:47,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:47,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:32:47,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:47,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:47,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:47,162 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:47,162 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:47,163 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:47,163 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:47,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:47,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:47,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:47,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:47,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:47,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:47,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:47,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:47,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638147615] [2020-09-21 11:32:47,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:47,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 11:32:47,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652451165] [2020-09-21 11:32:47,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 11:32:47,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:47,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 11:32:47,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:32:47,201 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-09-21 11:32:47,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:47,231 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-09-21 11:32:47,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 11:32:47,233 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-21 11:32:47,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:47,244 INFO L225 Difference]: With dead ends: 32 [2020-09-21 11:32:47,244 INFO L226 Difference]: Without dead ends: 13 [2020-09-21 11:32:47,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:32:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-09-21 11:32:47,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-09-21 11:32:47,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-21 11:32:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-09-21 11:32:47,302 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-09-21 11:32:47,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:47,302 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-09-21 11:32:47,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 11:32:47,303 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-09-21 11:32:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 11:32:47,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:47,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:47,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:32:47,305 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:47,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:47,305 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2020-09-21 11:32:47,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:47,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266239255] [2020-09-21 11:32:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:47,446 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:47,447 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:47,448 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:47,449 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:47,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:32:47,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:47,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-21 11:32:47,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:47,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:47,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:32:47,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:32:47,769 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 19 [2020-09-21 11:32:47,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:47,804 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:47,805 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:47,805 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:47,806 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:47,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:47,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:47,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:32:47,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:47,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:47,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:47,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:47,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:32:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:47,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266239255] [2020-09-21 11:32:47,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:47,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:32:47,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131590413] [2020-09-21 11:32:47,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:47,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:47,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:47,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:47,823 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-09-21 11:32:47,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:47,872 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-09-21 11:32:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:32:47,873 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-09-21 11:32:47,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:47,874 INFO L225 Difference]: With dead ends: 21 [2020-09-21 11:32:47,875 INFO L226 Difference]: Without dead ends: 16 [2020-09-21 11:32:47,876 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 [2020-09-21 11:32:47,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-21 11:32:47,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-21 11:32:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-21 11:32:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-09-21 11:32:47,882 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-09-21 11:32:47,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:47,883 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-09-21 11:32:47,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-09-21 11:32:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:32:47,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:47,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:47,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:32:47,885 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:47,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:47,885 INFO L82 PathProgramCache]: Analyzing trace with hash 743821333, now seen corresponding path program 1 times [2020-09-21 11:32:47,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:47,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869945539] [2020-09-21 11:32:47,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:47,910 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:47,911 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:47,911 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:47,911 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:47,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:32:47,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:47,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:32:47,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:47,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:32:47,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:47,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 11:32:47,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:47,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:47,955 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:47,956 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:47,956 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:47,956 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:47,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:47,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:47,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:47,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:47,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:47,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:47,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:47,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:47,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869945539] [2020-09-21 11:32:47,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:47,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:32:47,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002405124] [2020-09-21 11:32:47,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:32:47,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:47,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:32:47,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:32:47,964 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 3 states. [2020-09-21 11:32:47,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:47,984 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-09-21 11:32:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:32:47,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-09-21 11:32:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:47,986 INFO L225 Difference]: With dead ends: 27 [2020-09-21 11:32:47,986 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 11:32:47,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:32:47,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 11:32:47,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-09-21 11:32:47,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 11:32:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-09-21 11:32:47,992 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-09-21 11:32:47,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:47,992 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-09-21 11:32:47,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:32:47,993 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-09-21 11:32:47,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 11:32:47,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:47,994 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:47,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:32:47,994 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:47,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:47,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1575207660, now seen corresponding path program 1 times [2020-09-21 11:32:47,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:47,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714002406] [2020-09-21 11:32:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,029 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:48,029 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,029 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,029 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 11:32:48,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 11:32:48,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:32:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:48,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:32:48,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:48,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,128 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:48,128 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,128 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,130 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:48,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:32:48,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:48,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:48,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:48,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:32:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:48,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714002406] [2020-09-21 11:32:48,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:48,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-21 11:32:48,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100844142] [2020-09-21 11:32:48,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:32:48,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:48,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:32:48,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:32:48,140 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-09-21 11:32:48,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:48,172 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-09-21 11:32:48,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:32:48,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-21 11:32:48,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:48,174 INFO L225 Difference]: With dead ends: 30 [2020-09-21 11:32:48,174 INFO L226 Difference]: Without dead ends: 22 [2020-09-21 11:32:48,175 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 [2020-09-21 11:32:48,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-21 11:32:48,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-09-21 11:32:48,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:32:48,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-09-21 11:32:48,182 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-09-21 11:32:48,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:48,183 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-09-21 11:32:48,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:32:48,183 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-09-21 11:32:48,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 11:32:48,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:48,184 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:48,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:32:48,185 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:48,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:48,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1075985333, now seen corresponding path program 2 times [2020-09-21 11:32:48,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:48,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358862270] [2020-09-21 11:32:48,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,218 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:48,218 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,218 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,219 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:32:48,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 11:32:48,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:48,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:48,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:32:48,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:48,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,300 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:48,300 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,300 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,300 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:48,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:48,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:48,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:48,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:48,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:48,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358862270] [2020-09-21 11:32:48,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:48,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:32:48,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473980727] [2020-09-21 11:32:48,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:48,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:48,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:48,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:48,307 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-09-21 11:32:48,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:48,347 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-09-21 11:32:48,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:32:48,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-21 11:32:48,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:48,348 INFO L225 Difference]: With dead ends: 33 [2020-09-21 11:32:48,349 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 11:32:48,349 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 [2020-09-21 11:32:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 11:32:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-09-21 11:32:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 11:32:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-21 11:32:48,355 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-09-21 11:32:48,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:48,356 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-21 11:32:48,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-21 11:32:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:32:48,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:48,357 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:48,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:32:48,358 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:48,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:48,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1682133644, now seen corresponding path program 3 times [2020-09-21 11:32:48,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:48,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105303835] [2020-09-21 11:32:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,431 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:48,432 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,432 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,432 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:32:48,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-21 11:32:48,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:32:48,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:48,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:32:48,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:32:48,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,549 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:48,549 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,549 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,550 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:48,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:48,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:48,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:48,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:48,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:48,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105303835] [2020-09-21 11:32:48,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:48,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:32:48,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812469491] [2020-09-21 11:32:48,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:32:48,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:48,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:32:48,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:48,562 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-09-21 11:32:48,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:48,653 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-09-21 11:32:48,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:32:48,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-09-21 11:32:48,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:48,657 INFO L225 Difference]: With dead ends: 36 [2020-09-21 11:32:48,657 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 11:32:48,658 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 [2020-09-21 11:32:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 11:32:48,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-09-21 11:32:48,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 11:32:48,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-09-21 11:32:48,672 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-09-21 11:32:48,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:48,675 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-09-21 11:32:48,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:32:48,675 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-09-21 11:32:48,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 11:32:48,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:48,676 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:48,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:32:48,677 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:48,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1785237675, now seen corresponding path program 4 times [2020-09-21 11:32:48,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:48,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352854668] [2020-09-21 11:32:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,727 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:48,728 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,728 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,728 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:32:48,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 11:32:48,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:32:48,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:32:48,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:48,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,840 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:48,841 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,841 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,841 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:48,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:48,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:48,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:48,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:48,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352854668] [2020-09-21 11:32:48,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:48,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:32:48,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602015972] [2020-09-21 11:32:48,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:32:48,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:48,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:32:48,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:48,848 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-09-21 11:32:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:48,930 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-09-21 11:32:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:32:48,931 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-09-21 11:32:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:48,932 INFO L225 Difference]: With dead ends: 39 [2020-09-21 11:32:48,932 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 11:32:48,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 11:32:48,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-09-21 11:32:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 11:32:48,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-09-21 11:32:48,940 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-09-21 11:32:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:48,941 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-09-21 11:32:48,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:32:48,941 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-09-21 11:32:48,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 11:32:48,942 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:48,942 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:48,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:32:48,942 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:48,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:48,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1839158740, now seen corresponding path program 5 times [2020-09-21 11:32:48,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:48,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62388008] [2020-09-21 11:32:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:48,976 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:48,977 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:48,977 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:48,977 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:48,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 11:32:48,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:48,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:32:48,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:48,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:32:48,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:48,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:32:48,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,087 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,087 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,088 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,088 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:49,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:49,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:49,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:49,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:49,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:49,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62388008] [2020-09-21 11:32:49,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:49,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:32:49,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610195766] [2020-09-21 11:32:49,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:32:49,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:32:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:32:49,095 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-09-21 11:32:49,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:49,203 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-09-21 11:32:49,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:32:49,204 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-21 11:32:49,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:49,205 INFO L225 Difference]: With dead ends: 42 [2020-09-21 11:32:49,205 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 11:32:49,206 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 [2020-09-21 11:32:49,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 11:32:49,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-09-21 11:32:49,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 11:32:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-09-21 11:32:49,214 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-09-21 11:32:49,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:49,215 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-09-21 11:32:49,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:32:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-09-21 11:32:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 11:32:49,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:49,216 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:49,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:32:49,217 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:49,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:49,217 INFO L82 PathProgramCache]: Analyzing trace with hash 754936565, now seen corresponding path program 6 times [2020-09-21 11:32:49,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:49,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292908216] [2020-09-21 11:32:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,256 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:49,256 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,256 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,256 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-21 11:32:49,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 11:32:49,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:32:49,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:49,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 11:32:49,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,394 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,395 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,395 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,395 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:49,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:49,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:49,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:49,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:49,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:49,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292908216] [2020-09-21 11:32:49,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:49,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:32:49,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584725099] [2020-09-21 11:32:49,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:32:49,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:49,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:32:49,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:32:49,419 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-09-21 11:32:49,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:49,574 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-21 11:32:49,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:32:49,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-09-21 11:32:49,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:49,576 INFO L225 Difference]: With dead ends: 45 [2020-09-21 11:32:49,576 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 11:32:49,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:32:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 11:32:49,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-09-21 11:32:49,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 11:32:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-21 11:32:49,586 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-09-21 11:32:49,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:49,586 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-21 11:32:49,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:32:49,587 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-21 11:32:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 11:32:49,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:49,588 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:49,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:32:49,588 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:49,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:49,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1153812940, now seen corresponding path program 7 times [2020-09-21 11:32:49,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:49,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126219180] [2020-09-21 11:32:49,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,628 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:49,628 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,629 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,629 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-21 11:32:49,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 11:32:49,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:32:49,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:49,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:32:49,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,769 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,770 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,770 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,770 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:49,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:49,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:49,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:49,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:49,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:49,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126219180] [2020-09-21 11:32:49,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:49,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:32:49,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774243180] [2020-09-21 11:32:49,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:32:49,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:49,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:32:49,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:32:49,778 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-09-21 11:32:49,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:49,923 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-09-21 11:32:49,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:32:49,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-09-21 11:32:49,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:49,925 INFO L225 Difference]: With dead ends: 48 [2020-09-21 11:32:49,925 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 11:32:49,926 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 [2020-09-21 11:32:49,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 11:32:49,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-09-21 11:32:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 11:32:49,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-09-21 11:32:49,932 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-09-21 11:32:49,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:49,933 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-09-21 11:32:49,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:32:49,933 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-09-21 11:32:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 11:32:49,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:49,934 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:49,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:32:49,935 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:49,935 INFO L82 PathProgramCache]: Analyzing trace with hash 656682645, now seen corresponding path program 8 times [2020-09-21 11:32:49,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:49,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955160465] [2020-09-21 11:32:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,980 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:49,981 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,981 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,981 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:32:49,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 11:32:49,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:32:49,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:49,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-21 11:32:49,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:50,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:50,154 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:50,155 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:50,155 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:50,155 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:50,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:50,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:50,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:50,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:50,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:50,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:50,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:50,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:50,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955160465] [2020-09-21 11:32:50,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:50,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:32:50,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803841081] [2020-09-21 11:32:50,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:32:50,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:50,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:32:50,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:32:50,163 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-09-21 11:32:50,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:50,342 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-09-21 11:32:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:32:50,343 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-09-21 11:32:50,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:50,344 INFO L225 Difference]: With dead ends: 51 [2020-09-21 11:32:50,344 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 11:32:50,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:32:50,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 11:32:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-09-21 11:32:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 11:32:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-21 11:32:50,351 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-09-21 11:32:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:50,352 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-21 11:32:50,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:32:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-21 11:32:50,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 11:32:50,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:50,353 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:50,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:32:50,354 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:50,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:50,364 INFO L82 PathProgramCache]: Analyzing trace with hash 931352212, now seen corresponding path program 9 times [2020-09-21 11:32:50,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:50,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473940656] [2020-09-21 11:32:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:50,442 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:50,442 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:50,442 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:50,443 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:50,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-21 11:32:50,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:50,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-21 11:32:50,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:50,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:32:50,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:50,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 11:32:50,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:50,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:50,661 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:50,661 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:50,661 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:50,662 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:50,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:50,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:50,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:50,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:50,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:50,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473940656] [2020-09-21 11:32:50,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:50,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:32:50,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243098432] [2020-09-21 11:32:50,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:32:50,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:50,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:32:50,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:32:50,673 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 12 states. [2020-09-21 11:32:50,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:50,891 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-09-21 11:32:50,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:32:50,892 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-09-21 11:32:50,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:50,893 INFO L225 Difference]: With dead ends: 54 [2020-09-21 11:32:50,893 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 11:32:50,893 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 [2020-09-21 11:32:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 11:32:50,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-09-21 11:32:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 11:32:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-09-21 11:32:50,905 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2020-09-21 11:32:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:50,906 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-09-21 11:32:50,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:32:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-09-21 11:32:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 11:32:50,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:50,907 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:50,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 11:32:50,909 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:50,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:50,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1699723829, now seen corresponding path program 10 times [2020-09-21 11:32:50,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:50,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090140493] [2020-09-21 11:32:50,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:50,983 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:50,983 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:50,983 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:50,983 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:50,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-21 11:32:50,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:50,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-21 11:32:50,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:32:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-21 11:32:50,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:51,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:51,173 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:51,173 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:51,173 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:51,173 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:51,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:51,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:51,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:51,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:51,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:51,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:51,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:51,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:51,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090140493] [2020-09-21 11:32:51,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:51,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 11:32:51,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520810946] [2020-09-21 11:32:51,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:32:51,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:51,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:32:51,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:32:51,182 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 13 states. [2020-09-21 11:32:51,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:51,462 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-09-21 11:32:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 11:32:51,463 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-09-21 11:32:51,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:51,463 INFO L225 Difference]: With dead ends: 57 [2020-09-21 11:32:51,464 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 11:32:51,464 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 [2020-09-21 11:32:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 11:32:51,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-09-21 11:32:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 11:32:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-09-21 11:32:51,470 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2020-09-21 11:32:51,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:51,471 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-09-21 11:32:51,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:32:51,471 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-09-21 11:32:51,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 11:32:51,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:51,472 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:51,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 11:32:51,472 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:51,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:51,473 INFO L82 PathProgramCache]: Analyzing trace with hash 82878196, now seen corresponding path program 11 times [2020-09-21 11:32:51,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:51,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643458094] [2020-09-21 11:32:51,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:51,527 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:51,528 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:51,528 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:51,528 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:51,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-21 11:32:51,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:51,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-21 11:32:51,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:51,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:32:51,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:51,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-21 11:32:51,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:51,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:51,730 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:51,731 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:51,731 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:51,731 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:51,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:51,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:51,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:51,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:51,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:51,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:51,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:51,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:51,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643458094] [2020-09-21 11:32:51,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:51,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 11:32:51,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203067304] [2020-09-21 11:32:51,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 11:32:51,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 11:32:51,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:32:51,742 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 14 states. [2020-09-21 11:32:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:52,020 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-21 11:32:52,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 11:32:52,021 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-09-21 11:32:52,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:52,022 INFO L225 Difference]: With dead ends: 60 [2020-09-21 11:32:52,022 INFO L226 Difference]: Without dead ends: 52 [2020-09-21 11:32:52,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:32:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-21 11:32:52,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-09-21 11:32:52,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-21 11:32:52,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-09-21 11:32:52,033 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2020-09-21 11:32:52,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:52,033 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-09-21 11:32:52,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 11:32:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-09-21 11:32:52,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-21 11:32:52,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:52,036 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:52,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 11:32:52,036 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:52,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:52,037 INFO L82 PathProgramCache]: Analyzing trace with hash 692850133, now seen corresponding path program 12 times [2020-09-21 11:32:52,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:52,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321920722] [2020-09-21 11:32:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:52,125 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:52,126 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:52,126 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:52,126 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:52,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-21 11:32:52,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:52,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-21 11:32:52,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:52,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:32:52,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:52,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-21 11:32:52,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:52,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:52,400 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:52,400 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:52,400 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:52,401 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:52,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:52,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:52,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:52,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:52,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:52,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:52,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:52,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:52,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321920722] [2020-09-21 11:32:52,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:52,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 11:32:52,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339178501] [2020-09-21 11:32:52,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 11:32:52,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:52,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 11:32:52,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:32:52,421 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 15 states. [2020-09-21 11:32:52,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:52,815 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-09-21 11:32:52,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:32:52,816 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-09-21 11:32:52,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:52,817 INFO L225 Difference]: With dead ends: 63 [2020-09-21 11:32:52,817 INFO L226 Difference]: Without dead ends: 55 [2020-09-21 11:32:52,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:32:52,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-21 11:32:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-09-21 11:32:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-21 11:32:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-09-21 11:32:52,824 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2020-09-21 11:32:52,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:52,825 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-09-21 11:32:52,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 11:32:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-09-21 11:32:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-21 11:32:52,826 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:52,826 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:52,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 11:32:52,826 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:52,827 INFO L82 PathProgramCache]: Analyzing trace with hash 360195924, now seen corresponding path program 13 times [2020-09-21 11:32:52,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:52,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540556141] [2020-09-21 11:32:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:52,882 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:52,882 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:52,882 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:52,883 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:52,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-21 11:32:52,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:52,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-21 11:32:52,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:52,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 11:32:52,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:52,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-21 11:32:52,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:53,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:53,151 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:53,151 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:53,152 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:53,152 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:53,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:53,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:53,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:53,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:53,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:53,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:53,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:53,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 27 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:53,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540556141] [2020-09-21 11:32:53,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:53,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 11:32:53,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239652147] [2020-09-21 11:32:53,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 11:32:53,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:53,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 11:32:53,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:32:53,159 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 16 states. [2020-09-21 11:32:53,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:53,552 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-21 11:32:53,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 11:32:53,552 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-09-21 11:32:53,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:53,553 INFO L225 Difference]: With dead ends: 66 [2020-09-21 11:32:53,553 INFO L226 Difference]: Without dead ends: 58 [2020-09-21 11:32:53,554 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 [2020-09-21 11:32:53,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-21 11:32:53,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-21 11:32:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-21 11:32:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-09-21 11:32:53,574 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2020-09-21 11:32:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:53,574 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-09-21 11:32:53,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 11:32:53,575 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-09-21 11:32:53,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 11:32:53,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:53,575 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:53,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 11:32:53,576 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:53,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:53,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1251792523, now seen corresponding path program 14 times [2020-09-21 11:32:53,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:53,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026646259] [2020-09-21 11:32:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:53,661 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:53,662 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:53,662 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:53,662 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:53,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-21 11:32:53,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:53,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-21 11:32:53,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:53,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-21 11:32:53,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:53,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-21 11:32:53,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:54,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:54,017 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:54,018 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:54,018 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:54,018 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:54,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:54,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:54,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:54,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:54,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:54,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:54,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:54,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:54,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026646259] [2020-09-21 11:32:54,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:54,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 11:32:54,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753294370] [2020-09-21 11:32:54,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 11:32:54,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:54,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 11:32:54,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:32:54,028 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 17 states. [2020-09-21 11:32:54,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:54,537 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2020-09-21 11:32:54,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 11:32:54,537 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2020-09-21 11:32:54,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:54,538 INFO L225 Difference]: With dead ends: 69 [2020-09-21 11:32:54,538 INFO L226 Difference]: Without dead ends: 61 [2020-09-21 11:32:54,539 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 [2020-09-21 11:32:54,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-21 11:32:54,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-09-21 11:32:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-21 11:32:54,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-09-21 11:32:54,546 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2020-09-21 11:32:54,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:54,546 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-09-21 11:32:54,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 11:32:54,546 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-09-21 11:32:54,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-21 11:32:54,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:54,547 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:54,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 11:32:54,548 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:54,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:54,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1970280524, now seen corresponding path program 15 times [2020-09-21 11:32:54,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:54,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152432662] [2020-09-21 11:32:54,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:54,662 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:54,662 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:54,662 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:54,662 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:54,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-21 11:32:54,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:54,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-09-21 11:32:54,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:54,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-21 11:32:54,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:54,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-21 11:32:54,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:54,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:54,998 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:54,998 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:54,998 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:54,998 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:54,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:54,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:54,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:54,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:54,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:54,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:54,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:55,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 31 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:55,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152432662] [2020-09-21 11:32:55,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:55,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 11:32:55,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149731484] [2020-09-21 11:32:55,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 11:32:55,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:55,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 11:32:55,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:32:55,011 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 18 states. [2020-09-21 11:32:55,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:55,573 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-09-21 11:32:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 11:32:55,574 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-09-21 11:32:55,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:55,575 INFO L225 Difference]: With dead ends: 72 [2020-09-21 11:32:55,575 INFO L226 Difference]: Without dead ends: 64 [2020-09-21 11:32:55,576 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 [2020-09-21 11:32:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-21 11:32:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-09-21 11:32:55,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-21 11:32:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-09-21 11:32:55,585 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2020-09-21 11:32:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:55,585 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-09-21 11:32:55,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 11:32:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-09-21 11:32:55,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 11:32:55,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:55,586 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:55,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 11:32:55,587 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:55,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:55,587 INFO L82 PathProgramCache]: Analyzing trace with hash -329315051, now seen corresponding path program 16 times [2020-09-21 11:32:55,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:55,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190395583] [2020-09-21 11:32:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:55,661 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:55,661 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:55,661 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:55,662 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:55,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-21 11:32:55,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:55,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-21 11:32:55,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:55,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-21 11:32:55,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:55,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-21 11:32:55,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:56,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:56,011 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:56,011 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:56,011 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:56,011 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:56,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:56,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:56,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:56,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:56,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:56,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:56,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:56,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:56,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190395583] [2020-09-21 11:32:56,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:56,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 11:32:56,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782118216] [2020-09-21 11:32:56,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 11:32:56,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:56,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 11:32:56,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:32:56,021 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 19 states. [2020-09-21 11:32:56,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:56,611 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-09-21 11:32:56,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 11:32:56,612 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-09-21 11:32:56,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:56,613 INFO L225 Difference]: With dead ends: 75 [2020-09-21 11:32:56,613 INFO L226 Difference]: Without dead ends: 67 [2020-09-21 11:32:56,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:32:56,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-21 11:32:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-09-21 11:32:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-21 11:32:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-09-21 11:32:56,620 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 61 [2020-09-21 11:32:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:56,620 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-09-21 11:32:56,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 11:32:56,620 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-09-21 11:32:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-21 11:32:56,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:56,621 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:56,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 11:32:56,622 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:56,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:56,622 INFO L82 PathProgramCache]: Analyzing trace with hash 355328020, now seen corresponding path program 17 times [2020-09-21 11:32:56,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:56,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221930217] [2020-09-21 11:32:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:56,707 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:56,708 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:56,708 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:56,708 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:56,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-21 11:32:56,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:56,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-21 11:32:56,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:56,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-21 11:32:56,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:56,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-21 11:32:56,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:57,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:57,081 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:57,081 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:57,081 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:57,081 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:57,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:57,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:57,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:57,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:57,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:57,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:57,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:57,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 35 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:57,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221930217] [2020-09-21 11:32:57,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:57,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-21 11:32:57,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210479240] [2020-09-21 11:32:57,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-21 11:32:57,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:57,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-21 11:32:57,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:32:57,094 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 20 states. [2020-09-21 11:32:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:57,822 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-09-21 11:32:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 11:32:57,823 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-09-21 11:32:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:57,824 INFO L225 Difference]: With dead ends: 78 [2020-09-21 11:32:57,824 INFO L226 Difference]: Without dead ends: 70 [2020-09-21 11:32:57,825 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 [2020-09-21 11:32:57,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-21 11:32:57,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-09-21 11:32:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-21 11:32:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-09-21 11:32:57,832 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2020-09-21 11:32:57,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:57,832 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-09-21 11:32:57,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-21 11:32:57,832 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-09-21 11:32:57,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-21 11:32:57,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:57,833 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:57,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 11:32:57,833 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:57,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:57,834 INFO L82 PathProgramCache]: Analyzing trace with hash -242632523, now seen corresponding path program 18 times [2020-09-21 11:32:57,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:57,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550135839] [2020-09-21 11:32:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:57,921 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:57,921 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:57,922 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:57,922 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:57,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-21 11:32:57,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:57,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-21 11:32:57,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:57,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 11:32:57,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:57,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-21 11:32:57,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:58,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:58,307 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:58,307 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:58,307 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:58,308 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:58,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:58,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:58,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:58,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:58,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:58,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:58,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:58,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 37 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:58,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550135839] [2020-09-21 11:32:58,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:58,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 11:32:58,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475005909] [2020-09-21 11:32:58,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 11:32:58,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:58,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 11:32:58,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:32:58,320 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 21 states. [2020-09-21 11:32:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:59,148 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2020-09-21 11:32:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 11:32:59,149 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-09-21 11:32:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:59,150 INFO L225 Difference]: With dead ends: 81 [2020-09-21 11:32:59,150 INFO L226 Difference]: Without dead ends: 73 [2020-09-21 11:32:59,151 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 [2020-09-21 11:32:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-21 11:32:59,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-09-21 11:32:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-21 11:32:59,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-09-21 11:32:59,158 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 67 [2020-09-21 11:32:59,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:59,158 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-09-21 11:32:59,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 11:32:59,159 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-09-21 11:32:59,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-21 11:32:59,159 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:59,160 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:59,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 11:32:59,160 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:59,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:59,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1439174772, now seen corresponding path program 19 times [2020-09-21 11:32:59,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:59,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791870625] [2020-09-21 11:32:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:59,255 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:59,255 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:59,255 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:59,255 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:59,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-21 11:32:59,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:59,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-21 11:32:59,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:59,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-21 11:32:59,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:59,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-21 11:32:59,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:59,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:59,652 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:59,652 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:59,652 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:59,652 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:59,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:59,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:59,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:59,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:59,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:59,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:59,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 39 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:59,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791870625] [2020-09-21 11:32:59,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:59,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 11:32:59,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931870698] [2020-09-21 11:32:59,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 11:32:59,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:59,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 11:32:59,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:32:59,666 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 22 states. [2020-09-21 11:33:00,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:00,571 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-09-21 11:33:00,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 11:33:00,574 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2020-09-21 11:33:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:00,575 INFO L225 Difference]: With dead ends: 84 [2020-09-21 11:33:00,575 INFO L226 Difference]: Without dead ends: 76 [2020-09-21 11:33:00,576 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 [2020-09-21 11:33:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-21 11:33:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-09-21 11:33:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-21 11:33:00,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-09-21 11:33:00,583 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 70 [2020-09-21 11:33:00,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:00,583 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-09-21 11:33:00,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 11:33:00,584 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-09-21 11:33:00,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-21 11:33:00,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:00,584 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:00,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 11:33:00,585 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:00,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:00,585 INFO L82 PathProgramCache]: Analyzing trace with hash -928175019, now seen corresponding path program 20 times [2020-09-21 11:33:00,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:00,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028109764] [2020-09-21 11:33:00,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:00,727 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:00,731 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:00,731 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:00,731 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:00,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-21 11:33:00,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:00,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-21 11:33:00,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:00,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-21 11:33:00,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:33:00,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-09-21 11:33:00,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:01,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:01,216 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:01,216 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:01,217 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:01,217 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:01,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:33:01,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:01,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:01,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:01,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:01,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:01,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:01,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:01,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028109764] [2020-09-21 11:33:01,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:01,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 11:33:01,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823492918] [2020-09-21 11:33:01,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 11:33:01,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:01,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 11:33:01,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:33:01,229 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 23 states. [2020-09-21 11:33:02,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:02,199 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-09-21 11:33:02,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 11:33:02,199 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 73 [2020-09-21 11:33:02,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:02,201 INFO L225 Difference]: With dead ends: 87 [2020-09-21 11:33:02,201 INFO L226 Difference]: Without dead ends: 79 [2020-09-21 11:33:02,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:33:02,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-21 11:33:02,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-09-21 11:33:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-21 11:33:02,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-09-21 11:33:02,208 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2020-09-21 11:33:02,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:02,208 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-09-21 11:33:02,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 11:33:02,208 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-09-21 11:33:02,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-21 11:33:02,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:02,209 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:02,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 11:33:02,209 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:02,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:02,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1012168916, now seen corresponding path program 21 times [2020-09-21 11:33:02,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:02,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951131341] [2020-09-21 11:33:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:02,334 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:02,335 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:02,335 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:02,335 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:02,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-21 11:33:02,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:02,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-21 11:33:02,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:02,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-21 11:33:02,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:33:02,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-21 11:33:02,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:02,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:02,862 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:02,862 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:02,863 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:02,863 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:02,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:33:02,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:02,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:02,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:02,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:02,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:02,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:02,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 43 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:02,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951131341] [2020-09-21 11:33:02,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:02,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 11:33:02,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426264020] [2020-09-21 11:33:02,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 11:33:02,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:02,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 11:33:02,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:33:02,878 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 24 states. [2020-09-21 11:33:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:04,001 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-09-21 11:33:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 11:33:04,003 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2020-09-21 11:33:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:04,010 INFO L225 Difference]: With dead ends: 90 [2020-09-21 11:33:04,011 INFO L226 Difference]: Without dead ends: 82 [2020-09-21 11:33:04,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:33:04,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-21 11:33:04,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-09-21 11:33:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-21 11:33:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-09-21 11:33:04,022 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 76 [2020-09-21 11:33:04,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:04,022 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-09-21 11:33:04,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 11:33:04,023 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-09-21 11:33:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-21 11:33:04,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:04,024 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:04,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 11:33:04,030 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:04,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:04,031 INFO L82 PathProgramCache]: Analyzing trace with hash -166500363, now seen corresponding path program 22 times [2020-09-21 11:33:04,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:04,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893104890] [2020-09-21 11:33:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:04,205 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:04,205 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:04,205 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:04,206 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:04,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-21 11:33:04,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:04,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-09-21 11:33:04,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:04,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-21 11:33:04,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:33:04,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-09-21 11:33:04,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:04,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:04,937 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:04,938 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:04,938 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:04,938 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:04,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:33:04,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:04,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:04,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:04,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:04,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:04,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:04,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 45 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:04,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893104890] [2020-09-21 11:33:04,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:04,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-21 11:33:04,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944227359] [2020-09-21 11:33:04,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-21 11:33:04,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:04,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-21 11:33:04,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-09-21 11:33:04,966 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 25 states. [2020-09-21 11:33:06,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:06,100 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-09-21 11:33:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 11:33:06,101 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 79 [2020-09-21 11:33:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:06,102 INFO L225 Difference]: With dead ends: 93 [2020-09-21 11:33:06,102 INFO L226 Difference]: Without dead ends: 85 [2020-09-21 11:33:06,102 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 [2020-09-21 11:33:06,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-21 11:33:06,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-09-21 11:33:06,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-21 11:33:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-09-21 11:33:06,111 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2020-09-21 11:33:06,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:06,111 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-09-21 11:33:06,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-21 11:33:06,111 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-09-21 11:33:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-21 11:33:06,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:06,113 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:06,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 11:33:06,113 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:06,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:06,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1749621044, now seen corresponding path program 23 times [2020-09-21 11:33:06,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:06,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595773488] [2020-09-21 11:33:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:06,255 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:06,255 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:06,255 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:06,255 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:06,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-21 11:33:06,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:06,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-09-21 11:33:06,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:06,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-21 11:33:06,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:33:06,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-21 11:33:06,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:06,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:06,843 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:06,843 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:06,844 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:06,844 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:06,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:33:06,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:06,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:06,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:06,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:06,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:06,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:06,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 47 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:06,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595773488] [2020-09-21 11:33:06,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:06,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-21 11:33:06,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803804345] [2020-09-21 11:33:06,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-21 11:33:06,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:06,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-21 11:33:06,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-09-21 11:33:06,857 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 26 states. [2020-09-21 11:33:08,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:08,169 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2020-09-21 11:33:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-21 11:33:08,170 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 82 [2020-09-21 11:33:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:08,171 INFO L225 Difference]: With dead ends: 96 [2020-09-21 11:33:08,171 INFO L226 Difference]: Without dead ends: 88 [2020-09-21 11:33:08,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-09-21 11:33:08,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-21 11:33:08,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-09-21 11:33:08,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-21 11:33:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-09-21 11:33:08,179 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2020-09-21 11:33:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:08,179 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-09-21 11:33:08,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-21 11:33:08,180 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-09-21 11:33:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-21 11:33:08,182 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:08,182 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:08,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 11:33:08,182 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:08,183 INFO L82 PathProgramCache]: Analyzing trace with hash 512125845, now seen corresponding path program 24 times [2020-09-21 11:33:08,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:08,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883194793] [2020-09-21 11:33:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:08,346 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:08,346 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:08,347 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:08,347 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:08,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-21 11:33:08,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:08,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-09-21 11:33:08,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:08,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-21 11:33:08,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:33:08,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-21 11:33:08,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:08,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:08,977 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:08,977 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:08,977 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:08,977 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:08,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:33:08,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:08,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:08,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:08,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:08,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:08,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:08,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 49 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:08,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883194793] [2020-09-21 11:33:08,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:08,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-21 11:33:08,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663983358] [2020-09-21 11:33:08,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-21 11:33:08,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:08,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-21 11:33:08,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-09-21 11:33:08,996 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 27 states. [2020-09-21 11:33:10,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:10,287 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2020-09-21 11:33:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-21 11:33:10,287 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 85 [2020-09-21 11:33:10,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:10,288 INFO L225 Difference]: With dead ends: 99 [2020-09-21 11:33:10,288 INFO L226 Difference]: Without dead ends: 91 [2020-09-21 11:33:10,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-09-21 11:33:10,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-21 11:33:10,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-09-21 11:33:10,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-21 11:33:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-09-21 11:33:10,296 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 85 [2020-09-21 11:33:10,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:10,296 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-09-21 11:33:10,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-21 11:33:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-09-21 11:33:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-21 11:33:10,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:10,297 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:10,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 11:33:10,298 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:10,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:10,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2003045996, now seen corresponding path program 25 times [2020-09-21 11:33:10,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:10,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019858873] [2020-09-21 11:33:10,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:10,444 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:10,445 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:10,445 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:10,445 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:10,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-09-21 11:33:10,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:10,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-21 11:33:10,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:10,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-21 11:33:10,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:33:10,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-21 11:33:10,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:11,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:11,147 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:11,148 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:11,148 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:11,148 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:11,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:33:11,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:11,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:11,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:11,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:11,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:11,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:11,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 51 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:11,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019858873] [2020-09-21 11:33:11,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:11,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-21 11:33:11,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200107361] [2020-09-21 11:33:11,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-21 11:33:11,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:11,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-21 11:33:11,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-09-21 11:33:11,166 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 28 states. [2020-09-21 11:33:12,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:12,726 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-09-21 11:33:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-21 11:33:12,727 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 88 [2020-09-21 11:33:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:12,728 INFO L225 Difference]: With dead ends: 102 [2020-09-21 11:33:12,729 INFO L226 Difference]: Without dead ends: 94 [2020-09-21 11:33:12,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-09-21 11:33:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-21 11:33:12,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-09-21 11:33:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-21 11:33:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-09-21 11:33:12,742 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 88 [2020-09-21 11:33:12,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:12,742 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-09-21 11:33:12,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-21 11:33:12,742 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-09-21 11:33:12,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-21 11:33:12,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:12,744 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:12,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 11:33:12,744 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:12,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:12,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1487915211, now seen corresponding path program 26 times [2020-09-21 11:33:12,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:12,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367090527] [2020-09-21 11:33:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:12,934 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:12,935 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:12,935 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:12,935 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:12,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-21 11:33:12,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:12,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-09-21 11:33:12,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:12,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-21 11:33:12,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:33:12,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-09-21 11:33:12,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:13,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:13,782 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:13,783 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:13,783 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:13,783 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:13,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:33:13,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:13,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:13,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:13,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:13,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:13,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:13,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:13,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367090527] [2020-09-21 11:33:13,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:13,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-21 11:33:13,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969673899] [2020-09-21 11:33:13,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-21 11:33:13,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:13,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-21 11:33:13,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-09-21 11:33:13,816 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 29 states. [2020-09-21 11:33:15,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:15,455 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2020-09-21 11:33:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-21 11:33:15,456 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 91 [2020-09-21 11:33:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:15,458 INFO L225 Difference]: With dead ends: 105 [2020-09-21 11:33:15,458 INFO L226 Difference]: Without dead ends: 97 [2020-09-21 11:33:15,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-09-21 11:33:15,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-21 11:33:15,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-09-21 11:33:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-21 11:33:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-09-21 11:33:15,466 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 91 [2020-09-21 11:33:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:15,467 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-09-21 11:33:15,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-21 11:33:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-09-21 11:33:15,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-21 11:33:15,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:15,468 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:15,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-21 11:33:15,468 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:15,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1144847884, now seen corresponding path program 27 times [2020-09-21 11:33:15,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:15,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423261533] [2020-09-21 11:33:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:15,613 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:15,613 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:15,613 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:15,613 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:15,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-09-21 11:33:15,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:15,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-09-21 11:33:15,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:15,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-21 11:33:15,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:33:15,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-09-21 11:33:15,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:16,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,332 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:16,332 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,332 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,333 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:33:16,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:16,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:16,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:16,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:16,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 55 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:16,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423261533] [2020-09-21 11:33:16,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:16,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-21 11:33:16,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631279712] [2020-09-21 11:33:16,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-21 11:33:16,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:16,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-21 11:33:16,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-09-21 11:33:16,361 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 30 states. [2020-09-21 11:33:18,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:18,148 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-09-21 11:33:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-21 11:33:18,149 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 94 [2020-09-21 11:33:18,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:18,150 INFO L225 Difference]: With dead ends: 108 [2020-09-21 11:33:18,151 INFO L226 Difference]: Without dead ends: 100 [2020-09-21 11:33:18,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-09-21 11:33:18,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-21 11:33:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-09-21 11:33:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-21 11:33:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-09-21 11:33:18,158 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 94 [2020-09-21 11:33:18,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:18,159 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-09-21 11:33:18,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-21 11:33:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-09-21 11:33:18,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-21 11:33:18,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:18,160 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:18,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-21 11:33:18,161 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:18,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:18,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1446693589, now seen corresponding path program 28 times [2020-09-21 11:33:18,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:18,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736489611] [2020-09-21 11:33:18,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:18,339 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:18,340 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:18,340 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:18,340 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:18,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-21 11:33:18,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:18,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-09-21 11:33:18,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:18,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-21 11:33:18,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:33:18,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-09-21 11:33:18,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:19,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:19,202 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:19,203 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:19,203 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:19,203 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:19,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:33:19,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:19,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:19,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:19,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:19,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:19,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:19,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 57 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:19,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736489611] [2020-09-21 11:33:19,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:19,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-21 11:33:19,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172793003] [2020-09-21 11:33:19,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-21 11:33:19,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:19,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-21 11:33:19,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-09-21 11:33:19,222 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 31 states. [2020-09-21 11:33:21,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:21,115 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2020-09-21 11:33:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-21 11:33:21,116 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 97 [2020-09-21 11:33:21,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:21,117 INFO L225 Difference]: With dead ends: 111 [2020-09-21 11:33:21,117 INFO L226 Difference]: Without dead ends: 103 [2020-09-21 11:33:21,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-09-21 11:33:21,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-21 11:33:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-09-21 11:33:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-21 11:33:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-09-21 11:33:21,124 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 97 [2020-09-21 11:33:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:21,124 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-09-21 11:33:21,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-21 11:33:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-09-21 11:33:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-21 11:33:21,125 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:21,126 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:21,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-21 11:33:21,126 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:21,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:21,126 INFO L82 PathProgramCache]: Analyzing trace with hash -273397164, now seen corresponding path program 29 times [2020-09-21 11:33:21,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:21,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947584597] [2020-09-21 11:33:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:21,299 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:21,299 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:21,300 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:21,300 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:21,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-09-21 11:33:21,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:21,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-09-21 11:33:21,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:21,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-09-21 11:33:21,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:33:21,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-21 11:33:21,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:22,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:22,112 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:22,112 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:22,112 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:22,112 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:22,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:33:22,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:22,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:22,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:22,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:22,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:22,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:22,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 59 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:22,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947584597] [2020-09-21 11:33:22,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:22,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-21 11:33:22,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421580824] [2020-09-21 11:33:22,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-21 11:33:22,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:22,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-21 11:33:22,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-09-21 11:33:22,130 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 32 states. [2020-09-21 11:33:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:24,141 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2020-09-21 11:33:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-21 11:33:24,142 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 100 [2020-09-21 11:33:24,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:24,143 INFO L225 Difference]: With dead ends: 114 [2020-09-21 11:33:24,144 INFO L226 Difference]: Without dead ends: 106 [2020-09-21 11:33:24,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-09-21 11:33:24,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-21 11:33:24,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-09-21 11:33:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-21 11:33:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-09-21 11:33:24,152 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2020-09-21 11:33:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:24,152 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-09-21 11:33:24,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-21 11:33:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-09-21 11:33:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-21 11:33:24,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:24,153 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:24,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-21 11:33:24,154 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:24,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:24,154 INFO L82 PathProgramCache]: Analyzing trace with hash -242211211, now seen corresponding path program 30 times [2020-09-21 11:33:24,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:24,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699686299] [2020-09-21 11:33:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:24,321 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:24,322 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:24,322 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:24,322 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:24,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-21 11:33:24,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:24,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-09-21 11:33:24,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:24,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-21 11:33:24,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:33:24,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-21 11:33:24,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:25,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:25,216 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:25,216 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:25,216 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:25,216 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:25,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:33:25,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:25,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:25,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:25,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:25,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:25,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:25,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 61 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:25,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699686299] [2020-09-21 11:33:25,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:25,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-21 11:33:25,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000980572] [2020-09-21 11:33:25,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-21 11:33:25,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:25,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-21 11:33:25,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 11:33:25,241 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 33 states. [2020-09-21 11:33:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:27,346 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2020-09-21 11:33:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-21 11:33:27,348 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 103 [2020-09-21 11:33:27,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:27,349 INFO L225 Difference]: With dead ends: 117 [2020-09-21 11:33:27,349 INFO L226 Difference]: Without dead ends: 109 [2020-09-21 11:33:27,350 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 [2020-09-21 11:33:27,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-21 11:33:27,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-09-21 11:33:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-21 11:33:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-09-21 11:33:27,357 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 103 [2020-09-21 11:33:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:27,358 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-09-21 11:33:27,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-21 11:33:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-09-21 11:33:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-21 11:33:27,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:27,359 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:27,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-21 11:33:27,360 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:27,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1105578676, now seen corresponding path program 31 times [2020-09-21 11:33:27,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:27,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352230586] [2020-09-21 11:33:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:27,563 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:27,563 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:27,564 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:27,564 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:27,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-09-21 11:33:27,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:27,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-09-21 11:33:27,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:27,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-09-21 11:33:27,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:33:27,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-09-21 11:33:27,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:28,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:28,496 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:28,496 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:28,496 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:28,497 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:28,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:33:28,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:28,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:28,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:28,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:28,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:28,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:28,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 63 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:28,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352230586] [2020-09-21 11:33:28,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:28,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-21 11:33:28,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574265394] [2020-09-21 11:33:28,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-21 11:33:28,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:28,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-21 11:33:28,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 11:33:28,530 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 34 states. [2020-09-21 11:33:30,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:30,869 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2020-09-21 11:33:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-21 11:33:30,870 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 106 [2020-09-21 11:33:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:30,872 INFO L225 Difference]: With dead ends: 120 [2020-09-21 11:33:30,872 INFO L226 Difference]: Without dead ends: 112 [2020-09-21 11:33:30,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 11:33:30,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-21 11:33:30,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-09-21 11:33:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-21 11:33:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-09-21 11:33:30,887 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 106 [2020-09-21 11:33:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:30,887 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-09-21 11:33:30,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-21 11:33:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-09-21 11:33:30,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-21 11:33:30,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:30,889 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:30,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-21 11:33:30,891 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:30,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:30,891 INFO L82 PathProgramCache]: Analyzing trace with hash -535148011, now seen corresponding path program 32 times [2020-09-21 11:33:30,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:30,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883617055] [2020-09-21 11:33:30,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:31,091 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:31,092 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:31,092 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:31,092 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:31,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-09-21 11:33:31,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:31,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-09-21 11:33:31,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:31,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-21 11:33:31,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:33:31,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-09-21 11:33:31,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:32,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:32,143 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:32,143 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:32,143 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:32,143 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:32,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:33:32,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:32,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:33:32,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:32,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 65 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:32,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883617055] [2020-09-21 11:33:32,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:32,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-21 11:33:32,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554180775] [2020-09-21 11:33:32,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-21 11:33:32,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:32,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-21 11:33:32,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 11:33:32,164 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 35 states. [2020-09-21 11:33:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:34,645 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2020-09-21 11:33:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-21 11:33:34,646 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 109 [2020-09-21 11:33:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:34,647 INFO L225 Difference]: With dead ends: 123 [2020-09-21 11:33:34,647 INFO L226 Difference]: Without dead ends: 115 [2020-09-21 11:33:34,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 11:33:34,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-21 11:33:34,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-09-21 11:33:34,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-21 11:33:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-09-21 11:33:34,655 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 109 [2020-09-21 11:33:34,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:34,655 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-09-21 11:33:34,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-21 11:33:34,655 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-09-21 11:33:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-21 11:33:34,656 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:34,657 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:34,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-21 11:33:34,657 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:34,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:34,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1598915348, now seen corresponding path program 33 times [2020-09-21 11:33:34,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:34,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792833112] [2020-09-21 11:33:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:34,876 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:34,877 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:34,877 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:34,877 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:34,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-21 11:33:34,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:34,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-09-21 11:33:34,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:34,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-09-21 11:33:34,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:33:34,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-09-21 11:33:34,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:36,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:36,030 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:36,031 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:36,031 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:36,031 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:36,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:33:36,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:36,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:33:36,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:36,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:36,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:36,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:36,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 67 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:36,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792833112] [2020-09-21 11:33:36,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:36,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-21 11:33:36,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700513116] [2020-09-21 11:33:36,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-21 11:33:36,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:36,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-21 11:33:36,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-09-21 11:33:36,061 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 36 states. [2020-09-21 11:33:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:38,709 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2020-09-21 11:33:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-21 11:33:38,710 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 112 [2020-09-21 11:33:38,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:38,711 INFO L225 Difference]: With dead ends: 126 [2020-09-21 11:33:38,711 INFO L226 Difference]: Without dead ends: 118 [2020-09-21 11:33:38,713 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 [2020-09-21 11:33:38,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-21 11:33:38,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-09-21 11:33:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-21 11:33:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2020-09-21 11:33:38,719 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 112 [2020-09-21 11:33:38,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:38,720 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2020-09-21 11:33:38,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-21 11:33:38,720 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2020-09-21 11:33:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-21 11:33:38,721 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:38,721 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:38,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-21 11:33:38,722 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:38,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:38,722 INFO L82 PathProgramCache]: Analyzing trace with hash -920439371, now seen corresponding path program 34 times [2020-09-21 11:33:38,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:38,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683171622] [2020-09-21 11:33:38,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:38,938 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:38,938 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:38,939 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:38,939 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:38,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-09-21 11:33:38,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:38,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-09-21 11:33:38,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:38,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-21 11:33:38,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:33:38,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-09-21 11:33:38,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0