/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:59:08,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:59:08,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:59:08,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:59:08,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:59:08,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:59:08,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:59:08,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:59:08,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:59:08,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:59:08,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:59:08,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:59:08,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:59:08,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:59:08,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:59:08,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:59:08,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:59:08,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:59:08,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:59:08,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:59:08,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:59:08,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:59:08,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:59:08,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:59:08,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:59:08,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:59:08,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:59:08,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:59:08,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:59:08,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:59:08,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:59:08,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:59:08,982 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:59:08,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:59:08,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:59:08,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:59:08,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:59:08,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:59:08,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:59:08,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:59:08,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:59:08,988 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:59:09,025 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:59:09,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:59:09,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:59:09,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:59:09,028 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:59:09,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:59:09,028 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:59:09,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:59:09,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:59:09,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:59:09,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:59:09,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:59:09,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:59:09,031 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:59:09,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:59:09,031 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:59:09,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:59:09,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:59:09,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:59:09,032 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:59:09,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:59:09,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:59:09,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:59:09,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:59:09,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:59:09,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:59:09,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:59:09,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:59:09,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:59:09,034 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:59:09,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:59:09,331 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:59:09,334 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:59:09,336 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:59:09,337 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:59:09,337 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2020-10-13 10:59:09,411 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/447c6071d/0e79239750294f829b371df8dd4321df/FLAGc61d9ae8b [2020-10-13 10:59:09,839 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:59:09,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2020-10-13 10:59:09,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/447c6071d/0e79239750294f829b371df8dd4321df/FLAGc61d9ae8b [2020-10-13 10:59:10,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/447c6071d/0e79239750294f829b371df8dd4321df [2020-10-13 10:59:10,217 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:59:10,219 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:59:10,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:59:10,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:59:10,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:59:10,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:10" (1/1) ... [2020-10-13 10:59:10,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dadf5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:10, skipping insertion in model container [2020-10-13 10:59:10,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:10" (1/1) ... [2020-10-13 10:59:10,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:59:10,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:59:10,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:59:10,436 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:59:10,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:59:10,467 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:59:10,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:10 WrapperNode [2020-10-13 10:59:10,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:59:10,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:59:10,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:59:10,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:59:10,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:10" (1/1) ... [2020-10-13 10:59:10,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:10" (1/1) ... [2020-10-13 10:59:10,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:10" (1/1) ... [2020-10-13 10:59:10,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:10" (1/1) ... [2020-10-13 10:59:10,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:10" (1/1) ... [2020-10-13 10:59:10,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:10" (1/1) ... [2020-10-13 10:59:10,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:10" (1/1) ... [2020-10-13 10:59:10,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:59:10,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:59:10,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:59:10,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:59:10,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:59:10,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:59:10,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:59:10,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:59:10,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:59:10,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:59:10,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:59:10,652 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:59:10,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:59:10,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:59:10,820 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:59:10,820 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:59:10,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:10 BoogieIcfgContainer [2020-10-13 10:59:10,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:59:10,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:59:10,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:59:10,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:59:10,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:59:10" (1/3) ... [2020-10-13 10:59:10,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30bf458f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:10, skipping insertion in model container [2020-10-13 10:59:10,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:10" (2/3) ... [2020-10-13 10:59:10,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30bf458f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:10, skipping insertion in model container [2020-10-13 10:59:10,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:10" (3/3) ... [2020-10-13 10:59:10,832 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono1_1-1.c [2020-10-13 10:59:10,842 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:59:10,849 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:59:10,862 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:59:10,886 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:59:10,887 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:59:10,887 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:59:10,887 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:59:10,887 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:59:10,887 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:59:10,888 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:59:10,888 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:59:10,906 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-13 10:59:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:59:10,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:10,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:10,912 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:10,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:10,917 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-10-13 10:59:10,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:10,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459759797] [2020-10-13 10:59:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:11,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:11,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:11,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:59:11,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:11,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-13 10:59:11,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:11,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:11,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:59:11,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:11,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:59:11,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:11,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:11,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:11,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:11,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:11,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:59:11,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:11,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:11,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:11,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:11,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:11,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459759797] [2020-10-13 10:59:11,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:59:11,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 10:59:11,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124622451] [2020-10-13 10:59:11,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 10:59:11,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:11,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 10:59:11,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:59:11,121 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-13 10:59:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:11,140 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-13 10:59:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 10:59:11,141 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-13 10:59:11,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:11,148 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:59:11,148 INFO L226 Difference]: Without dead ends: 12 [2020-10-13 10:59:11,152 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 [2020-10-13 10:59:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-13 10:59:11,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-13 10:59:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-13 10:59:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-13 10:59:11,187 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-10-13 10:59:11,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:11,188 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-13 10:59:11,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 10:59:11,188 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-13 10:59:11,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:59:11,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:11,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:11,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:59:11,190 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:11,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:11,190 INFO L82 PathProgramCache]: Analyzing trace with hash -730736584, now seen corresponding path program 1 times [2020-10-13 10:59:11,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:11,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054240153] [2020-10-13 10:59:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:11,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:11,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:11,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:59:11,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:11,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-13 10:59:11,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:11,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:59:11,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:11,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:59:11,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:11,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:11,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:11,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:11,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:11,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:11,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:59:11,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:11,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:11,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:11,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:11,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:59:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:11,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054240153] [2020-10-13 10:59:11,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:59:11,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:59:11,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343847788] [2020-10-13 10:59:11,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:59:11,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:11,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:59:11,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:11,348 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-13 10:59:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:11,403 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-10-13 10:59:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:59:11,405 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:59:11,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:11,406 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:59:11,406 INFO L226 Difference]: Without dead ends: 14 [2020-10-13 10:59:11,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:11,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-13 10:59:11,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-13 10:59:11,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 10:59:11,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-13 10:59:11,413 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-13 10:59:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:11,414 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-13 10:59:11,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:59:11,414 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-13 10:59:11,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:59:11,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:11,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:11,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:59:11,416 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:11,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1082855947, now seen corresponding path program 1 times [2020-10-13 10:59:11,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:11,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55177509] [2020-10-13 10:59:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:11,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:11,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:11,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:59:11,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:11,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-13 10:59:11,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:11,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:59:11,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:59:11,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:59:11,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:59:11,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:11,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:11,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:11,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:11,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:11,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:59:11,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:11,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:11,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:11,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:11,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:11,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55177509] [2020-10-13 10:59:11,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:59:11,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:59:11,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796126636] [2020-10-13 10:59:11,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:59:11,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:11,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:59:11,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:11,630 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-10-13 10:59:11,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:11,684 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-13 10:59:11,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:59:11,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-13 10:59:11,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:11,685 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:59:11,685 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:59:11,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:11,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:59:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-13 10:59:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:59:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-13 10:59:11,695 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-13 10:59:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:11,695 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-13 10:59:11,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:59:11,696 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-13 10:59:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:59:11,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:11,698 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:11,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:59:11,698 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:11,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:11,699 INFO L82 PathProgramCache]: Analyzing trace with hash -109889104, now seen corresponding path program 1 times [2020-10-13 10:59:11,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:11,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203851017] [2020-10-13 10:59:11,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:11,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:11,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:11,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:11,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:59:11,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:11,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-13 10:59:11,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:11,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:59:11,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:59:11,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:59:11,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:11,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:11,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:11,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:11,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:11,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:11,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:59:11,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:11,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:11,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:11,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:11,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:11,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203851017] [2020-10-13 10:59:11,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:11,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:59:11,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761646292] [2020-10-13 10:59:11,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:59:11,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:11,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:59:11,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:11,930 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-13 10:59:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:14,037 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-13 10:59:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:59:14,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 10:59:14,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:14,105 INFO L225 Difference]: With dead ends: 23 [2020-10-13 10:59:14,105 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 10:59:14,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:14,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 10:59:14,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-13 10:59:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:59:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-13 10:59:14,112 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-13 10:59:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:14,113 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-13 10:59:14,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:59:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-13 10:59:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:59:14,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:14,114 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:14,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:59:14,115 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:14,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:14,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1391623509, now seen corresponding path program 2 times [2020-10-13 10:59:14,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:14,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937363040] [2020-10-13 10:59:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:14,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:14,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:14,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:14,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:59:14,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:14,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-13 10:59:14,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:14,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:59:14,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:14,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:59:14,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-10-13 10:59:14,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:14,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:14,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:14,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:14,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:14,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:14,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:14,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:14,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:14,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:14,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:59:14,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937363040] [2020-10-13 10:59:14,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:14,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:59:14,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347841164] [2020-10-13 10:59:14,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:59:14,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:14,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:59:14,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:14,406 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-10-13 10:59:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:14,439 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-13 10:59:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:59:14,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 10:59:14,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:14,440 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:59:14,441 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 10:59:14,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:14,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 10:59:14,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 10:59:14,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 10:59:14,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-13 10:59:14,448 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-13 10:59:14,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:14,448 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-13 10:59:14,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:59:14,448 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-13 10:59:14,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:59:14,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:14,449 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:14,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:59:14,450 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:14,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:14,450 INFO L82 PathProgramCache]: Analyzing trace with hash -89745752, now seen corresponding path program 3 times [2020-10-13 10:59:14,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:14,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646781352] [2020-10-13 10:59:14,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:14,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:14,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:14,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:14,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:59:14,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:14,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-13 10:59:14,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:14,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:59:14,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:59:14,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:59:14,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:14,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:14,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:14,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:14,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:14,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:14,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:14,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:14,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:14,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:14,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:14,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:59:14,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646781352] [2020-10-13 10:59:14,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:14,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:59:14,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422539735] [2020-10-13 10:59:14,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:59:14,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:14,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:59:14,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:59:14,724 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-10-13 10:59:14,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:14,892 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-13 10:59:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:59:14,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-13 10:59:14,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:14,894 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:59:14,894 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:59:14,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:59:14,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:59:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-13 10:59:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:59:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-13 10:59:14,901 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2020-10-13 10:59:14,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:14,902 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-13 10:59:14,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:59:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-13 10:59:14,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:59:14,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:14,903 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:14,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:59:14,903 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:14,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:14,904 INFO L82 PathProgramCache]: Analyzing trace with hash 786268579, now seen corresponding path program 4 times [2020-10-13 10:59:14,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:14,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259559297] [2020-10-13 10:59:14,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:14,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:14,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:15,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:15,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:59:15,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:15,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-13 10:59:15,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:15,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:59:15,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:15,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:59:15,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:15,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:15,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:15,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:15,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:15,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:15,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:15,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:15,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:15,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:15,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:15,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:59:15,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259559297] [2020-10-13 10:59:15,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:15,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:59:15,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964380779] [2020-10-13 10:59:15,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:59:15,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:15,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:59:15,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:59:15,250 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2020-10-13 10:59:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:15,287 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-13 10:59:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:59:15,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 10:59:15,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:15,289 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:59:15,289 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 10:59:15,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:59:15,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 10:59:15,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 10:59:15,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:59:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-13 10:59:15,297 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 20 [2020-10-13 10:59:15,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:15,297 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-13 10:59:15,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:59:15,298 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-13 10:59:15,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:59:15,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:15,299 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:15,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:59:15,299 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:15,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:15,300 INFO L82 PathProgramCache]: Analyzing trace with hash 564285216, now seen corresponding path program 5 times [2020-10-13 10:59:15,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:15,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124208837] [2020-10-13 10:59:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:15,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:15,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:15,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:15,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:59:15,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:15,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-13 10:59:15,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:15,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:59:15,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:59:15,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:59:15,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:15,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:15,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:15,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:15,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:15,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:15,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:15,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:15,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:15,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:15,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:15,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:59:15,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124208837] [2020-10-13 10:59:15,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:15,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:59:15,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192055660] [2020-10-13 10:59:15,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:59:15,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:15,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:59:15,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:59:15,644 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-10-13 10:59:19,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:19,054 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-10-13 10:59:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:59:19,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 10:59:19,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:19,056 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:59:19,056 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 10:59:19,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:59:19,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 10:59:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-13 10:59:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:59:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-13 10:59:19,063 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2020-10-13 10:59:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:19,063 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-13 10:59:19,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:59:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-13 10:59:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:59:19,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:19,064 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:19,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:59:19,065 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:19,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:19,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2050163685, now seen corresponding path program 6 times [2020-10-13 10:59:19,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:19,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205041796] [2020-10-13 10:59:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:19,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:19,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:19,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:19,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:59:19,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:19,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-13 10:59:19,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:19,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:59:19,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:19,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:59:19,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:19,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:19,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:19,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:19,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:19,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:19,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:19,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:19,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:19,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:19,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:19,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:59:19,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205041796] [2020-10-13 10:59:19,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:19,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:59:19,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959601340] [2020-10-13 10:59:19,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:59:19,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:19,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:59:19,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:59:19,529 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-10-13 10:59:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:19,590 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-10-13 10:59:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:59:19,591 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-13 10:59:19,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:19,592 INFO L225 Difference]: With dead ends: 41 [2020-10-13 10:59:19,592 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:59:19,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:59:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:59:19,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 10:59:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:59:19,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-13 10:59:19,605 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 24 [2020-10-13 10:59:19,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:19,606 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-13 10:59:19,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:59:19,606 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-13 10:59:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:59:19,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:19,607 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:19,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:59:19,607 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:19,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:19,608 INFO L82 PathProgramCache]: Analyzing trace with hash -968572136, now seen corresponding path program 7 times [2020-10-13 10:59:19,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:19,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134330220] [2020-10-13 10:59:19,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:19,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:19,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:20,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:20,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:59:20,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:20,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-10-13 10:59:20,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:20,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:59:20,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:59:20,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:59:20,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:20,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:20,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:20,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:20,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:20,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:20,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:20,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:20,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:59:20,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134330220] [2020-10-13 10:59:20,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:20,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:59:20,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159679741] [2020-10-13 10:59:20,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:59:20,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:20,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:59:20,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:59:20,218 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-10-13 10:59:20,855 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2020-10-13 10:59:21,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:21,207 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2020-10-13 10:59:21,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:59:21,208 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-13 10:59:21,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:21,209 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:59:21,209 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:59:21,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:59:21,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:59:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-13 10:59:21,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:59:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-13 10:59:21,217 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 26 [2020-10-13 10:59:21,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:21,217 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-13 10:59:21,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:59:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-13 10:59:21,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:59:21,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:21,218 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:21,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:59:21,219 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:21,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:21,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1952296429, now seen corresponding path program 8 times [2020-10-13 10:59:21,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:21,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874898494] [2020-10-13 10:59:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:21,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:21,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:21,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:21,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:59:21,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:21,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-13 10:59:21,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:21,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:59:21,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:21,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:59:21,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:21,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:21,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:21,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:21,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:21,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:21,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:21,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:21,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:21,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:21,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:21,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 10:59:21,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874898494] [2020-10-13 10:59:21,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:21,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:59:21,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691491134] [2020-10-13 10:59:21,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:59:21,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:21,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:59:21,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:59:21,765 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 7 states. [2020-10-13 10:59:21,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:21,826 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-10-13 10:59:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:59:21,826 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-13 10:59:21,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:21,827 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:59:21,827 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 10:59:21,828 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 [2020-10-13 10:59:21,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 10:59:21,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 10:59:21,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:59:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-13 10:59:21,837 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 28 [2020-10-13 10:59:21,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:21,837 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-13 10:59:21,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:59:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-13 10:59:21,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:59:21,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:21,840 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:21,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:59:21,842 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:21,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:21,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1397468528, now seen corresponding path program 9 times [2020-10-13 10:59:21,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:21,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414117903] [2020-10-13 10:59:21,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:21,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:21,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:22,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:22,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:59:22,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:22,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-10-13 10:59:22,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:22,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:59:22,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:59:22,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:59:22,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:22,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:22,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:22,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:22,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:22,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:22,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:22,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:22,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:22,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:22,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:22,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 10:59:22,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414117903] [2020-10-13 10:59:22,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:22,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:59:22,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413130771] [2020-10-13 10:59:22,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:59:22,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:22,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:59:22,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:59:22,717 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 8 states. [2020-10-13 10:59:25,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:25,243 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-10-13 10:59:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:59:25,244 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 10:59:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:25,245 INFO L225 Difference]: With dead ends: 41 [2020-10-13 10:59:25,245 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 10:59:25,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:59:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 10:59:25,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-13 10:59:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 10:59:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-13 10:59:25,252 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 30 [2020-10-13 10:59:25,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:25,253 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-13 10:59:25,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:59:25,253 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-13 10:59:25,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:59:25,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:25,254 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:25,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:59:25,254 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:25,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:25,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1804868725, now seen corresponding path program 10 times [2020-10-13 10:59:25,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:25,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639811164] [2020-10-13 10:59:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:25,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:25,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:26,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:59:26,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:26,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 736 [2020-10-13 10:59:26,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:26,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:59:26,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:26,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:59:26,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:26,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:26,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:26,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:26,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:26,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:26,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:26,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:26,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:26,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:26,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 10:59:26,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639811164] [2020-10-13 10:59:26,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:26,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:59:26,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152490095] [2020-10-13 10:59:26,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:59:26,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:26,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:59:26,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:59:26,103 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 8 states. [2020-10-13 10:59:26,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:26,177 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-10-13 10:59:26,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:59:26,179 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 10:59:26,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:26,180 INFO L225 Difference]: With dead ends: 53 [2020-10-13 10:59:26,180 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 10:59:26,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:59:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 10:59:26,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 10:59:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 10:59:26,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-13 10:59:26,189 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 32 [2020-10-13 10:59:26,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:26,190 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-13 10:59:26,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:59:26,190 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-13 10:59:26,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:59:26,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:26,192 INFO L422 BasicCegarLoop]: trace histogram [12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:26,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:59:26,193 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:26,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:26,193 INFO L82 PathProgramCache]: Analyzing trace with hash -480289400, now seen corresponding path program 11 times [2020-10-13 10:59:26,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:26,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960267661] [2020-10-13 10:59:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:26,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:27,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:27,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:59:27,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:27,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 915 [2020-10-13 10:59:27,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:27,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:59:27,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:59:27,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:59:27,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:27,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:27,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:27,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:27,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:27,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:27,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:59:27,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:27,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:27,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:27,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:27,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 10:59:27,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960267661] [2020-10-13 10:59:27,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:27,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:59:27,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872281560] [2020-10-13 10:59:27,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:59:27,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:27,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:59:27,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:59:27,301 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 9 states. [2020-10-13 10:59:28,214 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2020-10-13 10:59:28,504 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2020-10-13 10:59:38,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:38,672 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2020-10-13 10:59:38,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:59:38,673 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-13 10:59:38,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:38,674 INFO L225 Difference]: With dead ends: 45 [2020-10-13 10:59:38,674 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 10:59:38,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=65, Invalid=116, Unknown=1, NotChecked=0, Total=182 [2020-10-13 10:59:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 10:59:38,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-13 10:59:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:59:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-13 10:59:38,683 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 34 [2020-10-13 10:59:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:38,684 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-13 10:59:38,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:59:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-13 10:59:38,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:59:38,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:38,685 INFO L422 BasicCegarLoop]: trace histogram [13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:38,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:59:38,685 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:38,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:38,686 INFO L82 PathProgramCache]: Analyzing trace with hash -864022397, now seen corresponding path program 12 times [2020-10-13 10:59:38,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:38,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357678224] [2020-10-13 10:59:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:38,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:38,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:39,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:39,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:59:39,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:39,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 970 [2020-10-13 10:59:39,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:39,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:59:39,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:39,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:59:39,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:39,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:39,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:39,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:39,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:39,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:39,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:39,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:39,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:39,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:39,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:39,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:59:39,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357678224] [2020-10-13 10:59:39,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:39,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:59:39,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508430140] [2020-10-13 10:59:39,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:59:39,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:39,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:59:39,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:59:39,797 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 9 states. [2020-10-13 10:59:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:39,886 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2020-10-13 10:59:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:59:39,887 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-13 10:59:39,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:39,888 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:59:39,888 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 10:59:39,889 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 [2020-10-13 10:59:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 10:59:39,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-13 10:59:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:59:39,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-13 10:59:39,904 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 36 [2020-10-13 10:59:39,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:39,905 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-13 10:59:39,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:59:39,905 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-13 10:59:39,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:59:39,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:39,906 INFO L422 BasicCegarLoop]: trace histogram [14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:39,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:59:39,907 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:39,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:39,907 INFO L82 PathProgramCache]: Analyzing trace with hash 553403392, now seen corresponding path program 13 times [2020-10-13 10:59:39,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:39,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636315539] [2020-10-13 10:59:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:39,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:39,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:41,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:41,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:59:41,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:41,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1100 [2020-10-13 10:59:41,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:41,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:59:41,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:59:41,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:59:41,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:43,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:43,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:43,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:43,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:43,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:43,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:43,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:43,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:43,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:43,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:43,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 49 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 10:59:43,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636315539] [2020-10-13 10:59:43,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:43,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:59:43,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777024062] [2020-10-13 10:59:43,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:59:43,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:43,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:59:43,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2020-10-13 10:59:43,297 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 10 states. [2020-10-13 10:59:49,404 WARN L193 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 54 DAG size of output: 19 [2020-10-13 10:59:54,944 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2020-10-13 10:59:59,559 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2020-10-13 11:00:09,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:09,632 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-13 11:00:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 11:00:09,637 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-13 11:00:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:09,638 INFO L225 Difference]: With dead ends: 50 [2020-10-13 11:00:09,638 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 11:00:09,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=98, Invalid=171, Unknown=3, NotChecked=0, Total=272 [2020-10-13 11:00:09,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 11:00:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-10-13 11:00:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 11:00:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-10-13 11:00:09,647 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 38 [2020-10-13 11:00:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:09,647 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-10-13 11:00:09,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:00:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-10-13 11:00:09,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 11:00:09,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:09,648 INFO L422 BasicCegarLoop]: trace histogram [15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:09,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 11:00:09,649 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:09,649 INFO L82 PathProgramCache]: Analyzing trace with hash 377305339, now seen corresponding path program 14 times [2020-10-13 11:00:09,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:09,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915966242] [2020-10-13 11:00:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:09,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:09,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:10,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:10,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 11:00:10,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:00:10,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1323 [2020-10-13 11:00:10,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:10,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:00:10,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:10,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:00:10,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:11,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:11,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:11,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:11,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:11,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:11,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:11,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:11,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:11,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:11,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:11,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 11:00:11,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915966242] [2020-10-13 11:00:11,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:11,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:00:11,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616525702] [2020-10-13 11:00:11,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:00:11,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:11,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:00:11,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:00:11,107 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 10 states. [2020-10-13 11:00:11,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:11,212 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-10-13 11:00:11,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:00:11,214 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-13 11:00:11,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:11,215 INFO L225 Difference]: With dead ends: 65 [2020-10-13 11:00:11,215 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 11:00:11,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:00:11,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 11:00:11,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 11:00:11,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 11:00:11,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-13 11:00:11,225 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 40 [2020-10-13 11:00:11,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:11,230 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-13 11:00:11,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:00:11,230 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-13 11:00:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 11:00:11,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:11,231 INFO L422 BasicCegarLoop]: trace histogram [16, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:11,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 11:00:11,232 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:11,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1568053768, now seen corresponding path program 15 times [2020-10-13 11:00:11,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:11,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675836936] [2020-10-13 11:00:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:11,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:11,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:12,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:12,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 11:00:12,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:00:12,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1525 [2020-10-13 11:00:12,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:12,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:00:12,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 11:00:12,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:00:12,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:00:12,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:12,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:12,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:12,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:12,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:12,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:12,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:12,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:12,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:12,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:12,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 64 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 11:00:12,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675836936] [2020-10-13 11:00:12,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:12,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:00:12,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858017786] [2020-10-13 11:00:12,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:00:12,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:12,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:00:12,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:00:12,976 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 11 states. [2020-10-13 11:00:16,115 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 19 [2020-10-13 11:00:16,896 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2020-10-13 11:00:22,189 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 19 [2020-10-13 11:00:30,556 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2020-10-13 11:00:36,458 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2020-10-13 11:00:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:52,019 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-10-13 11:00:52,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:00:52,021 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-13 11:00:52,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:52,022 INFO L225 Difference]: With dead ends: 56 [2020-10-13 11:00:52,022 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 11:00:52,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=133, Invalid=244, Unknown=3, NotChecked=0, Total=380 [2020-10-13 11:00:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 11:00:52,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-10-13 11:00:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 11:00:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-10-13 11:00:52,032 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 42 [2020-10-13 11:00:52,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:52,032 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-10-13 11:00:52,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:00:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-10-13 11:00:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 11:00:52,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:52,033 INFO L422 BasicCegarLoop]: trace histogram [17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:52,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 11:00:52,033 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:52,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1766440179, now seen corresponding path program 16 times [2020-10-13 11:00:52,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:52,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732537804] [2020-10-13 11:00:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:52,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:52,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:53,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 11:00:53,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:00:53,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1463 [2020-10-13 11:00:53,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:53,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:00:53,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:53,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:00:53,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:53,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:53,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:53,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:53,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:53,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:53,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:53,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:53,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:53,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:53,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:00:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 11:00:53,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732537804] [2020-10-13 11:00:53,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:53,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:00:53,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080202233] [2020-10-13 11:00:53,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:00:53,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:53,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:00:53,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:00:53,678 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 11 states. [2020-10-13 11:00:53,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:53,868 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2020-10-13 11:00:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 11:00:53,872 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-13 11:00:53,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:53,873 INFO L225 Difference]: With dead ends: 71 [2020-10-13 11:00:53,873 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 11:00:53,874 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 [2020-10-13 11:00:53,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 11:00:53,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 11:00:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 11:00:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-13 11:00:53,895 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 44 [2020-10-13 11:00:53,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:53,895 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-13 11:00:53,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:00:53,896 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-13 11:00:53,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 11:00:53,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:53,904 INFO L422 BasicCegarLoop]: trace histogram [18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:53,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 11:00:53,905 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:53,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:53,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1991433360, now seen corresponding path program 17 times [2020-10-13 11:00:53,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:53,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678197050] [2020-10-13 11:00:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:53,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:55,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:55,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 11:00:55,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:00:55,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1883 [2020-10-13 11:00:55,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:55,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:00:55,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 11:00:55,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:00:55,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:56,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:56,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:56,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:56,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:56,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:56,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:56,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:56,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:56,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:56,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:56,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 81 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 11:00:56,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678197050] [2020-10-13 11:00:56,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:56,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 11:00:56,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937204665] [2020-10-13 11:00:56,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 11:00:56,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:56,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 11:00:56,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:00:56,048 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 12 states. [2020-10-13 11:00:58,579 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-13 11:00:58,972 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-13 11:00:59,269 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-13 11:00:59,524 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-13 11:01:00,400 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-13 11:01:21,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:21,657 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2020-10-13 11:01:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 11:01:21,658 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 11:01:21,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:21,659 INFO L225 Difference]: With dead ends: 62 [2020-10-13 11:01:21,659 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 11:01:21,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=162, Invalid=340, Unknown=4, NotChecked=0, Total=506 [2020-10-13 11:01:21,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 11:01:21,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-10-13 11:01:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 11:01:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-10-13 11:01:21,668 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 46 [2020-10-13 11:01:21,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:21,669 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-10-13 11:01:21,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 11:01:21,669 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-10-13 11:01:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 11:01:21,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:21,670 INFO L422 BasicCegarLoop]: trace histogram [19, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:21,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 11:01:21,670 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:21,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1374421909, now seen corresponding path program 18 times [2020-10-13 11:01:21,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:21,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836806854] [2020-10-13 11:01:21,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:21,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:21,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:23,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:23,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 11:01:23,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:01:23,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1766 [2020-10-13 11:01:23,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:23,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:01:23,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:23,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:01:23,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:23,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:23,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:23,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:23,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:23,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:23,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:23,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:23,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:23,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:23,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:23,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 90 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 11:01:23,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836806854] [2020-10-13 11:01:23,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:23,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 11:01:23,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251738413] [2020-10-13 11:01:23,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 11:01:23,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:23,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 11:01:23,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:01:23,616 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 12 states. [2020-10-13 11:01:23,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:23,797 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2020-10-13 11:01:23,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 11:01:23,800 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-13 11:01:23,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:23,801 INFO L225 Difference]: With dead ends: 77 [2020-10-13 11:01:23,801 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 11:01:23,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:01:23,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 11:01:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 11:01:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 11:01:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-13 11:01:23,810 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 48 [2020-10-13 11:01:23,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:23,810 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-13 11:01:23,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 11:01:23,811 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-13 11:01:23,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 11:01:23,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:23,811 INFO L422 BasicCegarLoop]: trace histogram [20, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:23,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 11:01:23,812 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:23,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1193943960, now seen corresponding path program 19 times [2020-10-13 11:01:23,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:23,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535845243] [2020-10-13 11:01:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:23,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:23,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:25,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:25,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 11:01:25,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:01:25,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1835 [2020-10-13 11:01:25,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:01:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 11:01:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:01:25,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:28,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:28,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:28,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:28,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:28,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:28,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:28,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:28,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:28,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:28,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:28,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 98 refuted. 2 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-13 11:01:28,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535845243] [2020-10-13 11:01:28,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:28,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:01:28,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347809507] [2020-10-13 11:01:28,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:01:28,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:28,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:01:28,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=122, Unknown=1, NotChecked=0, Total=156 [2020-10-13 11:01:28,109 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 13 states. [2020-10-13 11:01:28,911 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-13 11:01:33,363 WARN L193 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 73 DAG size of output: 17 [2020-10-13 11:01:36,583 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-13 11:01:38,857 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-13 11:01:43,714 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-13 11:01:46,934 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2020-10-13 11:02:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:08,012 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-10-13 11:02:08,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 11:02:08,015 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-13 11:02:08,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:08,015 INFO L225 Difference]: With dead ends: 62 [2020-10-13 11:02:08,015 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 11:02:08,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=172, Invalid=331, Unknown=3, NotChecked=0, Total=506 [2020-10-13 11:02:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 11:02:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-13 11:02:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 11:02:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-13 11:02:08,024 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 50 [2020-10-13 11:02:08,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:08,025 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-13 11:02:08,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:02:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-13 11:02:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 11:02:08,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:08,026 INFO L422 BasicCegarLoop]: trace histogram [21, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:08,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 11:02:08,026 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:08,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:08,026 INFO L82 PathProgramCache]: Analyzing trace with hash 508712803, now seen corresponding path program 20 times [2020-10-13 11:02:08,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:08,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827790329] [2020-10-13 11:02:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:08,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:08,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:09,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:09,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 11:02:09,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:02:09,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1868 [2020-10-13 11:02:09,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:09,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:02:09,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:09,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:02:09,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:10,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:10,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:10,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:10,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:10,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:10,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:02:10,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:10,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:10,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 110 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 11:02:10,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827790329] [2020-10-13 11:02:10,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:10,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:02:10,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681046823] [2020-10-13 11:02:10,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:02:10,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:10,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:02:10,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:02:10,107 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 13 states. [2020-10-13 11:02:10,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:10,311 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-10-13 11:02:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 11:02:10,312 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-13 11:02:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:10,313 INFO L225 Difference]: With dead ends: 83 [2020-10-13 11:02:10,313 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 11:02:10,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:02:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 11:02:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 11:02:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 11:02:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-13 11:02:10,322 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 52 [2020-10-13 11:02:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:10,322 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-13 11:02:10,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:02:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-13 11:02:10,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 11:02:10,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:10,323 INFO L422 BasicCegarLoop]: trace histogram [22, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:10,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 11:02:10,323 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:10,323 INFO L82 PathProgramCache]: Analyzing trace with hash 888795360, now seen corresponding path program 21 times [2020-10-13 11:02:10,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:10,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673410882] [2020-10-13 11:02:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:10,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:10,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:12,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:12,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 11:02:12,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:02:12,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2170 [2020-10-13 11:02:12,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:12,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:02:12,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 11:02:12,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:02:12,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:16,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:16,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:16,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:16,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:16,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:16,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:16,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:16,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:16,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:16,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:16,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 117 refuted. 4 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-13 11:02:16,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673410882] [2020-10-13 11:02:16,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:16,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 11:02:16,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485023641] [2020-10-13 11:02:16,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 11:02:16,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:16,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 11:02:16,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=144, Unknown=2, NotChecked=0, Total=182 [2020-10-13 11:02:16,990 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 14 states. [2020-10-13 11:02:19,579 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-13 11:02:23,661 WARN L838 $PredicateComparison]: unable to prove that (and (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)) 10000004)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)) 10000012)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)) 10000010)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) 10000002)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)) 10000008)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 17)) 4294967296)) 10000016)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)) 10000006)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 21)) 4294967296)) 10000020)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 19)) 4294967296)) 10000018)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 (- 15)) 4294967296)) 10000014))) is different from false [2020-10-13 11:02:28,442 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-13 11:02:31,411 WARN L193 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 80 DAG size of output: 17 [2020-10-13 11:02:32,189 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-13 11:02:35,054 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-13 11:02:51,002 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2020-10-13 11:02:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:53,258 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2020-10-13 11:02:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 11:02:53,258 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-13 11:02:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:53,260 INFO L225 Difference]: With dead ends: 66 [2020-10-13 11:02:53,260 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 11:02:53,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=177, Invalid=374, Unknown=5, NotChecked=44, Total=600 [2020-10-13 11:02:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 11:02:53,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-10-13 11:02:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 11:02:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2020-10-13 11:02:53,269 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 54 [2020-10-13 11:02:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:53,269 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2020-10-13 11:02:53,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 11:02:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2020-10-13 11:02:53,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 11:02:53,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:53,270 INFO L422 BasicCegarLoop]: trace histogram [23, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:53,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 11:02:53,270 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:53,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:53,271 INFO L82 PathProgramCache]: Analyzing trace with hash 566439387, now seen corresponding path program 22 times [2020-10-13 11:02:53,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:53,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066364339] [2020-10-13 11:02:53,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:53,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:53,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:55,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:55,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 11:02:55,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:02:55,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2155 [2020-10-13 11:02:55,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:55,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:02:55,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:55,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:02:55,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:55,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:55,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:55,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:55,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:55,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:55,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:55,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:55,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:55,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:55,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:55,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 132 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 11:02:55,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066364339] [2020-10-13 11:02:55,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:55,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 11:02:55,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36067530] [2020-10-13 11:02:55,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 11:02:55,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:55,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 11:02:55,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:02:55,654 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 14 states. [2020-10-13 11:02:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:55,902 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2020-10-13 11:02:55,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:02:55,904 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-13 11:02:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:55,905 INFO L225 Difference]: With dead ends: 89 [2020-10-13 11:02:55,905 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 11:02:55,905 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 [2020-10-13 11:02:55,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 11:02:55,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-13 11:02:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 11:02:55,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-10-13 11:02:55,912 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 56 [2020-10-13 11:02:55,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:55,913 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-10-13 11:02:55,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 11:02:55,913 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-10-13 11:02:55,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 11:02:55,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:55,913 INFO L422 BasicCegarLoop]: trace histogram [24, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:55,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 11:02:55,914 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:55,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:55,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2637608, now seen corresponding path program 23 times [2020-10-13 11:02:55,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:55,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112558508] [2020-10-13 11:02:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:55,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:55,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:58,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:58,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 11:02:58,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:02:58,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2573 [2020-10-13 11:02:58,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:58,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:02:58,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 11:02:58,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 11:02:58,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:59,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:59,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:59,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:59,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:59,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:59,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:59,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:59,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:59,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:59,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:59,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:02:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 144 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-13 11:02:59,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112558508] [2020-10-13 11:02:59,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:59,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 11:02:59,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31210394] [2020-10-13 11:02:59,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 11:02:59,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:59,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 11:02:59,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:02:59,131 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 15 states. [2020-10-13 11:03:04,601 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 82 DAG size of output: 19 [2020-10-13 11:03:09,211 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 19 [2020-10-13 11:03:11,832 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 75 DAG size of output: 19 [2020-10-13 11:03:20,968 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 19 [2020-10-13 11:03:29,740 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 19