/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 SingleStatement --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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:51:36,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:51:36,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:51:36,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:51:36,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:51:36,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:51:36,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:51:36,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:51:36,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:51:36,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:51:36,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:51:36,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:51:36,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:51:36,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:51:36,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:51:36,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:51:36,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:51:36,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:51:36,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:51:36,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:51:36,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:51:36,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:51:36,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:51:36,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:51:36,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:51:36,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:51:36,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:51:36,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:51:36,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:51:36,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:51:36,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:51:36,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:51:36,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:51:36,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:51:36,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:51:36,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:51:36,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:51:36,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:51:36,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:51:36,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:51:36,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:51:36,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:51:36,902 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:51:36,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:51:36,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:51:36,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:51:36,904 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:51:36,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:51:36,904 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:51:36,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:51:36,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:51:36,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:51:36,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:51:36,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:51:36,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:51:36,906 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:51:36,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:51:36,906 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:51:36,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:51:36,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:51:36,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:51:36,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:51:36,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:51:36,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:51:36,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:51:36,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:51:36,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:51:36,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:51:36,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:51:36,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:51:36,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:51:36,909 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 -> SingleStatement 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=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:51:37,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:51:37,393 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:51:37,399 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:51:37,402 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:51:37,403 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:51:37,404 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-24 21:51:37,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf5a529a7/e40f3e0533b64fd185dfd8cf22fd3fc1/FLAGc51413ce2 [2020-09-24 21:51:37,958 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:51:37,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-24 21:51:37,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf5a529a7/e40f3e0533b64fd185dfd8cf22fd3fc1/FLAGc51413ce2 [2020-09-24 21:51:38,318 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf5a529a7/e40f3e0533b64fd185dfd8cf22fd3fc1 [2020-09-24 21:51:38,330 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:51:38,335 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:51:38,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:51:38,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:51:38,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:51:38,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:51:38" (1/1) ... [2020-09-24 21:51:38,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f5301fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:38, skipping insertion in model container [2020-09-24 21:51:38,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:51:38" (1/1) ... [2020-09-24 21:51:38,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:51:38,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:51:38,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:51:38,656 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:51:38,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:51:38,689 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:51:38,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:38 WrapperNode [2020-09-24 21:51:38,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:51:38,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:51:38,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:51:38,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:51:38,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:38" (1/1) ... [2020-09-24 21:51:38,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:38" (1/1) ... [2020-09-24 21:51:38,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:38" (1/1) ... [2020-09-24 21:51:38,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:38" (1/1) ... [2020-09-24 21:51:38,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:38" (1/1) ... [2020-09-24 21:51:38,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:38" (1/1) ... [2020-09-24 21:51:38,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:38" (1/1) ... [2020-09-24 21:51:38,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:51:38,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:51:38,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:51:38,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:51:38,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:51:38,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:51:38,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:51:38,899 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:51:38,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:51:38,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:51:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:51:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:51:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:51:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:51:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:51:38,901 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:51:38,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:51:38,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:51:39,126 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:51:39,127 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:51:39,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:51:39 BoogieIcfgContainer [2020-09-24 21:51:39,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:51:39,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:51:39,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:51:39,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:51:39,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:51:38" (1/3) ... [2020-09-24 21:51:39,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53810321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:51:39, skipping insertion in model container [2020-09-24 21:51:39,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:38" (2/3) ... [2020-09-24 21:51:39,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53810321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:51:39, skipping insertion in model container [2020-09-24 21:51:39,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:51:39" (3/3) ... [2020-09-24 21:51:39,143 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-09-24 21:51:39,157 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:51:39,167 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:51:39,212 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:51:39,261 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:51:39,262 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:51:39,262 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:51:39,262 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:51:39,262 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:51:39,262 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:51:39,263 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:51:39,263 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:51:39,283 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-24 21:51:39,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 21:51:39,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:39,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:39,291 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:39,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:39,297 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-09-24 21:51:39,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:39,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704824906] [2020-09-24 21:51:39,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:39,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:39,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:39,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:39,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:51:39,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:51:39,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-24 21:51:39,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:39,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:51:39,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:51:39,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 21:51:39,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:51:39,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:39,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:39,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:39,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:39,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:39,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:51:39,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:39,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:39,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:39,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:39,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:39,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704824906] [2020-09-24 21:51:39,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:51:39,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 21:51:39,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937054070] [2020-09-24 21:51:39,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:51:39,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:39,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:51:39,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:51:39,651 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-09-24 21:51:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:39,773 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-09-24 21:51:39,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 21:51:39,775 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-09-24 21:51:39,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:39,788 INFO L225 Difference]: With dead ends: 60 [2020-09-24 21:51:39,789 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 21:51:39,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:51:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 21:51:39,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-24 21:51:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 21:51:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-09-24 21:51:39,836 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 11 [2020-09-24 21:51:39,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:39,836 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-09-24 21:51:39,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:51:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-09-24 21:51:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-24 21:51:39,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:39,838 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:39,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:51:39,838 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:39,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:39,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1780115143, now seen corresponding path program 1 times [2020-09-24 21:51:39,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:39,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592133719] [2020-09-24 21:51:39,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:39,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:39,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:39,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:39,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:40,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:40,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:40,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 21:51:40,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:51:40,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 741 [2020-09-24 21:51:40,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:51:40,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:51:40,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 21:51:40,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:40,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:40,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:40,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:40,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:40,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:40,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:51:40,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:40,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:40,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:40,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:40,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:40,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592133719] [2020-09-24 21:51:40,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:40,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:51:40,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654055661] [2020-09-24 21:51:40,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:51:40,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:40,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:51:40,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:51:40,709 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-09-24 21:51:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:40,816 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-09-24 21:51:40,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 21:51:40,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-24 21:51:40,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:40,819 INFO L225 Difference]: With dead ends: 46 [2020-09-24 21:51:40,819 INFO L226 Difference]: Without dead ends: 39 [2020-09-24 21:51:40,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:51:40,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-24 21:51:40,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-24 21:51:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 21:51:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-24 21:51:40,833 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 22 [2020-09-24 21:51:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:40,834 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-24 21:51:40,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:51:40,834 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-24 21:51:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 21:51:40,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:40,838 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:40,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:51:40,838 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:40,839 INFO L82 PathProgramCache]: Analyzing trace with hash -703709792, now seen corresponding path program 2 times [2020-09-24 21:51:40,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:40,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957009953] [2020-09-24 21:51:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:40,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:40,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:40,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:40,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:40,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:41,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:41,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:41,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:42,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:42,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:42,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:42,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:42,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:42,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 21:51:42,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 21:51:42,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2117 [2020-09-24 21:51:42,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:42,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:51:42,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:51:42,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 21:51:42,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:43,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:43,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:43,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:43,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:43,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:43,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:51:43,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:43,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:43,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:43,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:43,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:43,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957009953] [2020-09-24 21:51:43,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:43,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 21:51:43,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763939297] [2020-09-24 21:51:43,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:51:43,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:43,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:51:43,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:51:43,070 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 8 states. [2020-09-24 21:51:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:43,182 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-09-24 21:51:43,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:51:43,182 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-09-24 21:51:43,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:43,184 INFO L225 Difference]: With dead ends: 55 [2020-09-24 21:51:43,184 INFO L226 Difference]: Without dead ends: 48 [2020-09-24 21:51:43,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:51:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-24 21:51:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-09-24 21:51:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-24 21:51:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-09-24 21:51:43,200 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2020-09-24 21:51:43,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:43,200 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-09-24 21:51:43,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:51:43,201 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-09-24 21:51:43,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 21:51:43,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:43,202 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:43,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:51:43,202 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:43,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:43,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1522653351, now seen corresponding path program 3 times [2020-09-24 21:51:43,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:43,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307951917] [2020-09-24 21:51:43,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:43,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:43,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:43,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:43,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:43,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:43,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:43,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:43,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:43,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:43,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:43,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:45,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:46,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:46,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:47,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:47,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:48,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:48,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 21:51:48,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-09-24 21:51:48,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 21:51:48,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:48,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:51:48,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:51:48,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 21:51:48,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:51:48,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:48,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:48,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:48,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:48,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:48,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:51:48,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:48,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:48,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:48,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:48,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:51:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:48,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307951917] [2020-09-24 21:51:48,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:48,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 21:51:48,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821788873] [2020-09-24 21:51:48,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 21:51:48,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:48,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 21:51:48,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:51:48,426 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 11 states. [2020-09-24 21:51:48,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:48,632 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-09-24 21:51:48,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:51:48,633 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-09-24 21:51:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:48,635 INFO L225 Difference]: With dead ends: 64 [2020-09-24 21:51:48,635 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 21:51:48,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:51:48,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 21:51:48,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-09-24 21:51:48,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-24 21:51:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-09-24 21:51:48,648 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 36 [2020-09-24 21:51:48,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:48,649 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-09-24 21:51:48,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 21:51:48,649 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-09-24 21:51:48,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 21:51:48,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:48,653 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:48,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:51:48,653 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:48,654 INFO L82 PathProgramCache]: Analyzing trace with hash 918522752, now seen corresponding path program 4 times [2020-09-24 21:51:48,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:48,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447751955] [2020-09-24 21:51:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:48,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:48,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:48,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:48,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:48,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:48,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:48,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:48,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:48,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:49,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:49,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:49,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:49,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:50,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:50,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:53,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:53,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 21:51:53,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-24 21:51:53,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 21:51:53,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:51:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:51:53,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-24 21:51:53,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:53,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:53,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:53,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:53,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:53,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:53,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:51:53,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:53,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:53,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:53,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:53,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-24 21:51:53,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447751955] [2020-09-24 21:51:53,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:51:53,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 21:51:53,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220044256] [2020-09-24 21:51:53,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:51:53,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:53,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:51:53,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:51:53,703 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 4 states. [2020-09-24 21:51:53,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:53,744 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2020-09-24 21:51:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:51:53,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-09-24 21:51:53,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:53,746 INFO L225 Difference]: With dead ends: 98 [2020-09-24 21:51:53,746 INFO L226 Difference]: Without dead ends: 54 [2020-09-24 21:51:53,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:51:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-24 21:51:53,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-09-24 21:51:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-24 21:51:53,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-09-24 21:51:53,754 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 43 [2020-09-24 21:51:53,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:53,754 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-09-24 21:51:53,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:51:53,755 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-09-24 21:51:53,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-24 21:51:53,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:53,756 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:53,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:51:53,756 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:53,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:53,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1800177917, now seen corresponding path program 1 times [2020-09-24 21:51:53,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:53,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398981369] [2020-09-24 21:51:53,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:53,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:53,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:53,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:53,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:53,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:53,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:54,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:54,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:54,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:54,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:54,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:55,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:56,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:56,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:58,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 21:51:58,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-09-24 21:51:58,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:51:58,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:58,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:51:58,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:51:58,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 21:51:58,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:58,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:58,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:58,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:58,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:58,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:51:58,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:58,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:58,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:58,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:58,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:58,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398981369] [2020-09-24 21:51:58,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:58,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:51:58,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268132861] [2020-09-24 21:51:58,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:51:58,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:58,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:51:58,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:51:58,922 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 13 states. [2020-09-24 21:51:59,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:59,152 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2020-09-24 21:51:59,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 21:51:59,153 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-09-24 21:51:59,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:59,155 INFO L225 Difference]: With dead ends: 73 [2020-09-24 21:51:59,155 INFO L226 Difference]: Without dead ends: 66 [2020-09-24 21:51:59,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:51:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-24 21:51:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-09-24 21:51:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-24 21:51:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-09-24 21:51:59,169 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 45 [2020-09-24 21:51:59,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:59,170 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-09-24 21:51:59,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:51:59,170 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-09-24 21:51:59,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 21:51:59,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:59,171 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:59,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:51:59,171 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:59,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:59,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1644898454, now seen corresponding path program 2 times [2020-09-24 21:51:59,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:59,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131710583] [2020-09-24 21:51:59,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:59,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:02,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:03,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:04,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 21:52:04,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-09-24 21:52:04,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:52:04,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:04,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:52:04,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:04,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:52:04,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 21:52:04,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:04,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:04,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:04,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:04,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:04,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:04,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:04,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:04,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:04,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-24 21:52:04,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131710583] [2020-09-24 21:52:04,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:04,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 21:52:04,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906465855] [2020-09-24 21:52:04,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:52:04,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:04,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:52:04,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:52:04,219 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 5 states. [2020-09-24 21:52:04,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:04,271 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2020-09-24 21:52:04,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:52:04,272 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-09-24 21:52:04,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:04,273 INFO L225 Difference]: With dead ends: 107 [2020-09-24 21:52:04,273 INFO L226 Difference]: Without dead ends: 63 [2020-09-24 21:52:04,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:52:04,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-24 21:52:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-09-24 21:52:04,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-24 21:52:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-09-24 21:52:04,280 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 52 [2020-09-24 21:52:04,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:04,281 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-09-24 21:52:04,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:52:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-09-24 21:52:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-24 21:52:04,282 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:04,282 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:04,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:52:04,283 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:04,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:04,283 INFO L82 PathProgramCache]: Analyzing trace with hash 462169753, now seen corresponding path program 3 times [2020-09-24 21:52:04,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:04,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527063087] [2020-09-24 21:52:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:04,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:09,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 21:52:09,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-09-24 21:52:09,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:52:09,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:09,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:52:09,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:52:09,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 21:52:09,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:09,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:09,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:09,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:09,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:09,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:09,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:09,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:09,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:09,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:09,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:09,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527063087] [2020-09-24 21:52:09,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:09,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 21:52:09,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709146394] [2020-09-24 21:52:09,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:52:09,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:09,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:52:09,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:52:09,446 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 15 states. [2020-09-24 21:52:09,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:09,679 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-09-24 21:52:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 21:52:09,680 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2020-09-24 21:52:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:09,681 INFO L225 Difference]: With dead ends: 82 [2020-09-24 21:52:09,681 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 21:52:09,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:52:09,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 21:52:09,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-24 21:52:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 21:52:09,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-09-24 21:52:09,688 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 54 [2020-09-24 21:52:09,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:09,689 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-09-24 21:52:09,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:52:09,689 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-09-24 21:52:09,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 21:52:09,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:09,690 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:09,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:52:09,690 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:09,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:09,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1009785792, now seen corresponding path program 4 times [2020-09-24 21:52:09,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:09,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7171342] [2020-09-24 21:52:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:09,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:11,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:11,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:11,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:11,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:14,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 21:52:14,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-09-24 21:52:14,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 21:52:14,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:14,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:52:14,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:14,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 21:52:14,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:14,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:14,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:14,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:14,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:14,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:14,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:14,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:14,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:14,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:14,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-24 21:52:14,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7171342] [2020-09-24 21:52:14,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:14,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:52:14,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042766399] [2020-09-24 21:52:14,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:52:14,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:14,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:52:14,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:52:14,740 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 6 states. [2020-09-24 21:52:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:14,824 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2020-09-24 21:52:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 21:52:14,826 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-09-24 21:52:14,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:14,827 INFO L225 Difference]: With dead ends: 116 [2020-09-24 21:52:14,827 INFO L226 Difference]: Without dead ends: 72 [2020-09-24 21:52:14,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:52:14,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-24 21:52:14,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-09-24 21:52:14,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 21:52:14,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-09-24 21:52:14,837 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 61 [2020-09-24 21:52:14,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:14,838 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-09-24 21:52:14,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:52:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-09-24 21:52:14,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 21:52:14,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:14,839 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:14,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:52:14,840 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:14,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:14,840 INFO L82 PathProgramCache]: Analyzing trace with hash 521183171, now seen corresponding path program 5 times [2020-09-24 21:52:14,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:14,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245364116] [2020-09-24 21:52:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:14,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:16,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:16,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:18,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:18,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:18,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:18,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:19,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:19,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-24 21:52:19,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-24 21:52:19,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:52:19,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:19,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 21:52:19,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:52:19,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-24 21:52:19,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:20,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:20,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:20,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:20,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:20,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:20,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:20,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:20,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:20,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 10 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:20,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245364116] [2020-09-24 21:52:20,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:20,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 21:52:20,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379190275] [2020-09-24 21:52:20,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:52:20,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:20,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:52:20,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:52:20,071 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 18 states. [2020-09-24 21:52:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:21,340 INFO L93 Difference]: Finished difference Result 238 states and 265 transitions. [2020-09-24 21:52:21,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-24 21:52:21,341 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 63 [2020-09-24 21:52:21,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:21,345 INFO L225 Difference]: With dead ends: 238 [2020-09-24 21:52:21,346 INFO L226 Difference]: Without dead ends: 201 [2020-09-24 21:52:21,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=577, Invalid=2075, Unknown=0, NotChecked=0, Total=2652 [2020-09-24 21:52:21,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-24 21:52:21,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 115. [2020-09-24 21:52:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-24 21:52:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2020-09-24 21:52:21,373 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 63 [2020-09-24 21:52:21,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:21,373 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2020-09-24 21:52:21,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:52:21,373 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2020-09-24 21:52:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 21:52:21,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:21,378 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:21,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:52:21,378 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:21,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:21,379 INFO L82 PathProgramCache]: Analyzing trace with hash 453697312, now seen corresponding path program 6 times [2020-09-24 21:52:21,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:21,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718224802] [2020-09-24 21:52:21,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:21,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:21,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:21,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:21,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:21,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:21,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:21,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:22,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:23,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:23,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:23,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:24,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:24,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:25,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:26,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:26,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:26,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 21:52:26,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-24 21:52:26,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 21:52:26,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:26,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:52:26,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:52:26,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 21:52:26,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:26,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:26,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:26,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:26,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:26,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:26,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:26,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:26,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:26,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:26,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:26,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:26,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718224802] [2020-09-24 21:52:26,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:26,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 21:52:26,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452508092] [2020-09-24 21:52:26,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:52:26,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:26,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:52:26,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:52:26,595 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand 17 states. [2020-09-24 21:52:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:26,979 INFO L93 Difference]: Finished difference Result 204 states and 221 transitions. [2020-09-24 21:52:26,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 21:52:26,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-09-24 21:52:26,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:26,983 INFO L225 Difference]: With dead ends: 204 [2020-09-24 21:52:26,983 INFO L226 Difference]: Without dead ends: 197 [2020-09-24 21:52:26,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:52:26,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-24 21:52:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 124. [2020-09-24 21:52:26,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-24 21:52:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 135 transitions. [2020-09-24 21:52:26,993 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 135 transitions. Word has length 65 [2020-09-24 21:52:26,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:26,993 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 135 transitions. [2020-09-24 21:52:26,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:52:26,994 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 135 transitions. [2020-09-24 21:52:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 21:52:26,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:26,995 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:26,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:52:26,995 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:26,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:26,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1701784103, now seen corresponding path program 7 times [2020-09-24 21:52:26,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:26,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217543993] [2020-09-24 21:52:26,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:27,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:27,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:27,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:27,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:27,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:27,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:27,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:27,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:27,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:27,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:28,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:31,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:31,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:32,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:32,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 21:52:32,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 21:52:32,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 21:52:32,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:32,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 21:52:32,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:52:32,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-09-24 21:52:32,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:32,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:32,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:32,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:32,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:32,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:32,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:32,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:32,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:32,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:32,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:32,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 20 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:32,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217543993] [2020-09-24 21:52:32,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:32,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:52:32,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799357267] [2020-09-24 21:52:32,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:52:32,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:32,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:52:32,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:52:32,267 INFO L87 Difference]: Start difference. First operand 124 states and 135 transitions. Second operand 20 states.