/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:19:16,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:19:16,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:19:16,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:19:16,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:19:16,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:19:16,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:19:16,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:19:16,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:19:16,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:19:16,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:19:16,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:19:16,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:19:16,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:19:16,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:19:16,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:19:16,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:19:16,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:19:16,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:19:16,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:19:16,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:19:16,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:19:16,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:19:16,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:19:16,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:19:16,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:19:16,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:19:16,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:19:16,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:19:16,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:19:16,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:19:16,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:19:16,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:19:16,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:19:16,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:19:16,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:19:16,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:19:16,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:19:16,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:19:16,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:19:16,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:19:16,371 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 17:19:16,399 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:19:16,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:19:16,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:19:16,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:19:16,401 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:19:16,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:19:16,402 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:19:16,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:19:16,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:19:16,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:19:16,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:19:16,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:19:16,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:19:16,403 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:19:16,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:19:16,404 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:19:16,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:19:16,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:19:16,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:19:16,405 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:19:16,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:19:16,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:19:16,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:19:16,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:19:16,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:19:16,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:19:16,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:19:16,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:19:16,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:19:16,407 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;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;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;log-additional-information=true; [2020-09-24 17:19:16,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:19:16,971 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:19:16,975 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:19:16,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:19:16,979 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:19:16,981 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-09-24 17:19:17,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aada18db9/b1e9f2ad89df473a825c6be2bcad7076/FLAGdc301bd88 [2020-09-24 17:19:17,612 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:19:17,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs2f.c [2020-09-24 17:19:17,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aada18db9/b1e9f2ad89df473a825c6be2bcad7076/FLAGdc301bd88 [2020-09-24 17:19:17,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aada18db9/b1e9f2ad89df473a825c6be2bcad7076 [2020-09-24 17:19:17,970 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:19:17,977 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:19:17,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:19:17,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:19:17,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:19:17,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:19:17" (1/1) ... [2020-09-24 17:19:17,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb7919e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:17, skipping insertion in model container [2020-09-24 17:19:17,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:19:17" (1/1) ... [2020-09-24 17:19:17,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:19:18,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:19:18,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:19:18,287 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:19:18,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:19:18,426 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:19:18,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:18 WrapperNode [2020-09-24 17:19:18,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:19:18,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:19:18,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:19:18,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:19:18,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:18" (1/1) ... [2020-09-24 17:19:18,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:18" (1/1) ... [2020-09-24 17:19:18,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:18" (1/1) ... [2020-09-24 17:19:18,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:18" (1/1) ... [2020-09-24 17:19:18,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:18" (1/1) ... [2020-09-24 17:19:18,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:18" (1/1) ... [2020-09-24 17:19:18,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:18" (1/1) ... [2020-09-24 17:19:18,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:19:18,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:19:18,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:19:18,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:19:18,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:18" (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 17:19:18,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:19:18,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:19:18,569 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 17:19:18,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 17:19:18,570 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:19:18,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:19:18,570 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 17:19:18,570 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 17:19:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 17:19:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:19:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 17:19:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:19:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 17:19:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 17:19:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 17:19:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 17:19:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 17:19:18,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:19:18,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:19:18,939 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:19:18,940 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 17:19:18,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:19:18 BoogieIcfgContainer [2020-09-24 17:19:18,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:19:18,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:19:18,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:19:18,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:19:18,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:19:17" (1/3) ... [2020-09-24 17:19:18,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280ece52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:19:18, skipping insertion in model container [2020-09-24 17:19:18,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:18" (2/3) ... [2020-09-24 17:19:18,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280ece52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:19:18, skipping insertion in model container [2020-09-24 17:19:18,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:19:18" (3/3) ... [2020-09-24 17:19:18,956 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-09-24 17:19:18,969 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:19:18,980 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:19:19,004 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:19:19,036 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:19:19,037 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:19:19,037 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:19:19,037 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:19:19,037 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:19:19,037 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:19:19,037 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:19:19,037 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:19:19,060 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-09-24 17:19:19,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 17:19:19,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:19:19,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:19:19,070 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:19:19,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:19:19,076 INFO L82 PathProgramCache]: Analyzing trace with hash 221259408, now seen corresponding path program 1 times [2020-09-24 17:19:19,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:19:19,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122636152] [2020-09-24 17:19:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:19:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:19,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:19,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:19,603 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:19,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 17:19:19,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:19:19,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-09-24 17:19:19,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:19,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:19,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 17:19:19,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:19,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:19:19,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:19:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:19,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:19,741 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:19,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:19:19,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:19,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 17:19:19,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:19,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:19,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:19,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:19,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:19:19,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 17:19:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:19,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:19,761 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:19,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:19:19,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:19,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:19:19,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:19,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:19,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:19,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:19,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:19:19,771 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 17:19:19,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122636152] [2020-09-24 17:19:19,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:19:19,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 17:19:19,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948425543] [2020-09-24 17:19:19,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 17:19:19,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:19:19,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 17:19:19,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:19:19,805 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 3 states. [2020-09-24 17:19:20,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:19:20,000 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-09-24 17:19:20,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 17:19:20,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-24 17:19:20,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:19:20,019 INFO L225 Difference]: With dead ends: 101 [2020-09-24 17:19:20,019 INFO L226 Difference]: Without dead ends: 47 [2020-09-24 17:19:20,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 17:19:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-24 17:19:20,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-09-24 17:19:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-24 17:19:20,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-09-24 17:19:20,095 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 30 [2020-09-24 17:19:20,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:19:20,097 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-09-24 17:19:20,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 17:19:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-09-24 17:19:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 17:19:20,101 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:19:20,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:19:20,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:19:20,103 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:19:20,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:19:20,104 INFO L82 PathProgramCache]: Analyzing trace with hash -151091841, now seen corresponding path program 1 times [2020-09-24 17:19:20,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:19:20,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035656267] [2020-09-24 17:19:20,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:19:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:20,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:20,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:20,512 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:20,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 17:19:20,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:19:20,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-09-24 17:19:20,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:19:20,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 17:19:20,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 17:19:20,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 19 [2020-09-24 17:19:20,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:19:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:20,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:20,624 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:20,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:19:20,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:20,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 17:19:20,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:20,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:20,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:20,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:20,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:19:20,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 17:19:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:20,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:20,658 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:20,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:19:20,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:20,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 17:19:20,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:20,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:19:20,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:20,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:19:20,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:20,665 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 17:19:20,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035656267] [2020-09-24 17:19:20,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:19:20,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:19:20,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64716788] [2020-09-24 17:19:20,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:19:20,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:19:20,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:19:20,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:19:20,673 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 5 states. [2020-09-24 17:19:20,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:19:20,841 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-09-24 17:19:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:19:20,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-24 17:19:20,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:19:20,843 INFO L225 Difference]: With dead ends: 67 [2020-09-24 17:19:20,843 INFO L226 Difference]: Without dead ends: 49 [2020-09-24 17:19:20,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:19:20,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-24 17:19:20,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-09-24 17:19:20,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-24 17:19:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-09-24 17:19:20,854 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 30 [2020-09-24 17:19:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:19:20,855 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-09-24 17:19:20,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:19:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-09-24 17:19:20,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 17:19:20,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:19:20,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:19:20,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:19:20,857 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:19:20,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:19:20,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1707000309, now seen corresponding path program 1 times [2020-09-24 17:19:20,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:19:20,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547936821] [2020-09-24 17:19:20,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:19:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:20,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:20,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:20,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:21,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:22,968 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:22,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 17:19:22,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:19:22,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2090 [2020-09-24 17:19:22,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:22,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:19:22,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-24 17:19:22,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 17:19:22,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:23,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:19:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:23,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:23,081 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:23,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:19:23,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:23,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:19:23,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:23,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:23,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:23,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:23,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:23,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 17:19:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:23,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:23,091 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:23,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:19:23,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:23,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:19:23,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:23,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:23,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:23,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:23,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 17:19:23,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547936821] [2020-09-24 17:19:23,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:19:23,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 17:19:23,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245022108] [2020-09-24 17:19:23,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 17:19:23,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:19:23,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 17:19:23,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-24 17:19:23,101 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 9 states. [2020-09-24 17:19:23,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:19:23,526 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-09-24 17:19:23,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 17:19:23,526 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-09-24 17:19:23,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:19:23,528 INFO L225 Difference]: With dead ends: 77 [2020-09-24 17:19:23,528 INFO L226 Difference]: Without dead ends: 71 [2020-09-24 17:19:23,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-24 17:19:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-24 17:19:23,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2020-09-24 17:19:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 17:19:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-09-24 17:19:23,538 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 42 [2020-09-24 17:19:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:19:23,539 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-09-24 17:19:23,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 17:19:23,539 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-09-24 17:19:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 17:19:23,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:19:23,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:19:23,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:19:23,541 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:19:23,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:19:23,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1495951507, now seen corresponding path program 1 times [2020-09-24 17:19:23,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:19:23,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117696304] [2020-09-24 17:19:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:19:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:23,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:23,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:23,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:24,435 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:24,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 17:19:24,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:19:24,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 876 [2020-09-24 17:19:24,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:24,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:19:24,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-24 17:19:24,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-24 17:19:24,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:24,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:19:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:24,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:24,476 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:24,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:19:24,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:24,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:19:24,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:24,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:24,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:24,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:24,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:24,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 17:19:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:24,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:24,487 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:24,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:19:24,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:24,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:19:24,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:24,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:24,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:24,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:24,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 17:19:24,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117696304] [2020-09-24 17:19:24,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:19:24,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:19:24,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704660138] [2020-09-24 17:19:24,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:19:24,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:19:24,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:19:24,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:19:24,496 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 4 states. [2020-09-24 17:19:24,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:19:24,600 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-09-24 17:19:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 17:19:24,600 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-09-24 17:19:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:19:24,602 INFO L225 Difference]: With dead ends: 87 [2020-09-24 17:19:24,602 INFO L226 Difference]: Without dead ends: 58 [2020-09-24 17:19:24,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:19:24,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-24 17:19:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-09-24 17:19:24,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 17:19:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-09-24 17:19:24,611 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 46 [2020-09-24 17:19:24,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:19:24,611 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-09-24 17:19:24,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:19:24,612 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-09-24 17:19:24,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 17:19:24,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:19:24,614 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:19:24,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:19:24,614 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:19:24,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:19:24,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1747495296, now seen corresponding path program 1 times [2020-09-24 17:19:24,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:19:24,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752907651] [2020-09-24 17:19:24,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:19:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:24,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:24,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:24,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:24,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:24,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:25,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:26,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:26,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:29,652 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:29,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 17:19:29,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 17:19:29,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-24 17:19:29,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:29,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 17:19:29,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-24 17:19:29,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 17:19:29,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:29,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:19:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:29,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:29,839 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:29,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:19:29,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:29,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:19:29,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:29,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:29,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:29,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:29,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:29,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 17:19:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:29,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:29,849 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:19:29,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:19:29,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:19:29,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:19:29,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:19:29,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:19:29,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:19:29,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:19:29,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:19:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 17:19:29,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752907651] [2020-09-24 17:19:29,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:19:29,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 17:19:29,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727096245] [2020-09-24 17:19:29,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 17:19:29,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:19:29,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 17:19:29,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:19:29,862 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 12 states. [2020-09-24 17:19:30,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:19:30,282 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2020-09-24 17:19:30,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 17:19:30,282 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-09-24 17:19:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:19:30,284 INFO L225 Difference]: With dead ends: 91 [2020-09-24 17:19:30,284 INFO L226 Difference]: Without dead ends: 67 [2020-09-24 17:19:30,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2020-09-24 17:19:30,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-24 17:19:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2020-09-24 17:19:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-24 17:19:30,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-09-24 17:19:30,301 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 52 [2020-09-24 17:19:30,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:19:30,304 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-09-24 17:19:30,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 17:19:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-09-24 17:19:30,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 17:19:30,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:19:30,310 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:19:30,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:19:30,311 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:19:30,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:19:30,312 INFO L82 PathProgramCache]: Analyzing trace with hash -557611095, now seen corresponding path program 1 times [2020-09-24 17:19:30,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:19:30,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593672989] [2020-09-24 17:19:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:19:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:19:30,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:30,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:30,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:30,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:31,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:31,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:31,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:32,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:33,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:33,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:40,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:40,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:41,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:42,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:42,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:43,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:44,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:47,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:47,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:50,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:50,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:51,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:51,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:51,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:51,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:52,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:52,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:52,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:52,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:53,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:53,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:53,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:54,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:54,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:54,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:54,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:54,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:55,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:55,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:56,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:56,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:56,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:19:56,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:00,745 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:00,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 17:20:00,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 43 [2020-09-24 17:20:00,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30405 [2020-09-24 17:20:00,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:00,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-24 17:20:00,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-24 17:20:00,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 17:20:00,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:01,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:01,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:01,660 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:01,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:20:01,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:01,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:20:01,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:01,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:01,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:01,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:01,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:01,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 17:20:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:01,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:01,669 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:01,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:20:01,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:01,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:20:01,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:01,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:01,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:01,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:01,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:01,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593672989] [2020-09-24 17:20:01,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:01,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 17:20:01,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577940579] [2020-09-24 17:20:01,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 17:20:01,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:01,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 17:20:01,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-09-24 17:20:01,690 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 23 states.