/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=SMALLEST --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-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:28:16,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:28:16,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:28:16,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:28:16,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:28:16,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:28:16,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:28:16,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:28:16,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:28:16,504 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:28:16,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:28:16,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:28:16,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:28:16,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:28:16,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:28:16,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:28:16,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:28:16,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:28:16,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:28:16,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:28:16,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:28:16,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:28:16,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:28:16,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:28:16,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:28:16,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:28:16,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:28:16,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:28:16,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:28:16,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:28:16,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:28:16,531 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:28:16,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:28:16,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:28:16,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:28:16,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:28:16,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:28:16,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:28:16,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:28:16,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:28:16,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:28:16,539 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 18:28:16,568 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:28:16,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:28:16,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:28:16,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:28:16,570 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:28:16,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:28:16,570 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:28:16,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:28:16,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:28:16,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:28:16,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:28:16,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:28:16,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:28:16,573 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:28:16,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:28:16,573 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:28:16,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:28:16,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:28:16,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:28:16,574 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:28:16,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:28:16,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:28:16,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:28:16,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:28:16,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:28:16,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:28:16,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:28:16,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:28:16,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:28:16,577 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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;log-additional-information=true; [2020-09-24 18:28:17,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:28:17,099 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:28:17,104 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:28:17,106 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:28:17,106 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:28:17,108 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-24 18:28:17,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01200d140/75b0d71603904656a33b97ad9b5ea3e6/FLAGc162ce679 [2020-09-24 18:28:17,759 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:28:17,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-24 18:28:17,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01200d140/75b0d71603904656a33b97ad9b5ea3e6/FLAGc162ce679 [2020-09-24 18:28:18,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01200d140/75b0d71603904656a33b97ad9b5ea3e6 [2020-09-24 18:28:18,098 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:28:18,103 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:28:18,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:28:18,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:28:18,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:28:18,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:28:18" (1/1) ... [2020-09-24 18:28:18,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad60208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:28:18, skipping insertion in model container [2020-09-24 18:28:18,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:28:18" (1/1) ... [2020-09-24 18:28:18,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:28:18,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:28:18,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:28:18,393 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:28:18,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:28:18,433 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:28:18,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:28:18 WrapperNode [2020-09-24 18:28:18,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:28:18,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:28:18,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:28:18,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:28:18,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:28:18" (1/1) ... [2020-09-24 18:28:18,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:28:18" (1/1) ... [2020-09-24 18:28:18,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:28:18" (1/1) ... [2020-09-24 18:28:18,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:28:18" (1/1) ... [2020-09-24 18:28:18,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:28:18" (1/1) ... [2020-09-24 18:28:18,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:28:18" (1/1) ... [2020-09-24 18:28:18,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:28:18" (1/1) ... [2020-09-24 18:28:18,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:28:18,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:28:18,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:28:18,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:28:18,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:28:18" (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 18:28:18,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:28:18,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:28:18,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 18:28:18,648 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-24 18:28:18,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:28:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 18:28:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:28:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 18:28:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 18:28:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 18:28:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 18:28:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:28:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 18:28:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 18:28:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 18:28:18,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:28:18,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:28:19,014 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:28:19,015 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 18:28:19,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:28:19 BoogieIcfgContainer [2020-09-24 18:28:19,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:28:19,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:28:19,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:28:19,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:28:19,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:28:18" (1/3) ... [2020-09-24 18:28:19,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c726e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:28:19, skipping insertion in model container [2020-09-24 18:28:19,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:28:18" (2/3) ... [2020-09-24 18:28:19,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c726e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:28:19, skipping insertion in model container [2020-09-24 18:28:19,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:28:19" (3/3) ... [2020-09-24 18:28:19,037 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-09-24 18:28:19,049 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:28:19,057 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:28:19,078 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:28:19,107 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:28:19,107 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:28:19,107 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:28:19,108 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:28:19,108 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:28:19,108 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:28:19,108 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:28:19,108 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:28:19,135 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-24 18:28:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 18:28:19,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:28:19,146 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] [2020-09-24 18:28:19,146 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:28:19,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:28:19,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1392671971, now seen corresponding path program 1 times [2020-09-24 18:28:19,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:28:19,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239901211] [2020-09-24 18:28:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:28:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:19,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:19,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:19,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:19,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 18:28:19,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:28:19,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-09-24 18:28:19,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:19,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:19,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-24 18:28:19,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:19,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:28:19,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:28:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:19,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:19,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:19,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:28:19,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:28:19,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 18:28:19,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:19,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:19,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:28:19,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:19,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:28:19,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:28:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:19,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:19,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:19,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 18:28:19,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:28:19,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 18:28:19,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:19,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:19,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 18:28:19,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:19,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:28:19,758 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 18:28:19,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239901211] [2020-09-24 18:28:19,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:28:19,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:28:19,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112967583] [2020-09-24 18:28:19,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:28:19,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:28:19,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:28:19,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:28:19,792 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-09-24 18:28:20,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:28:20,048 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-24 18:28:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 18:28:20,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-24 18:28:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:28:20,073 INFO L225 Difference]: With dead ends: 94 [2020-09-24 18:28:20,074 INFO L226 Difference]: Without dead ends: 53 [2020-09-24 18:28:20,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 18:28:20,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-24 18:28:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-09-24 18:28:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-24 18:28:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-09-24 18:28:20,150 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-09-24 18:28:20,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:28:20,150 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-09-24 18:28:20,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:28:20,152 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-09-24 18:28:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 18:28:20,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:28:20,156 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] [2020-09-24 18:28:20,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:28:20,157 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:28:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:28:20,158 INFO L82 PathProgramCache]: Analyzing trace with hash 31734745, now seen corresponding path program 1 times [2020-09-24 18:28:20,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:28:20,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723122716] [2020-09-24 18:28:20,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:28:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:20,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:20,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:20,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:20,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 18:28:20,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:28:20,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-09-24 18:28:20,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:20,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:28:20,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 18:28:20,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 18:28:20,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:28:20,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:28:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:20,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:20,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:20,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:28:20,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:28:20,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 18:28:20,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:20,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:20,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:28:20,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:20,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:28:20,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:28:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:20,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:20,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:20,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:20,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 18:28:20,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:28:20,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 18:28:20,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:20,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:20,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:28:20,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:20,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:28:20,782 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 18:28:20,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723122716] [2020-09-24 18:28:20,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:28:20,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:28:20,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984539305] [2020-09-24 18:28:20,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:28:20,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:28:20,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:28:20,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:28:20,790 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 5 states. [2020-09-24 18:28:21,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:28:21,024 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2020-09-24 18:28:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:28:21,025 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-24 18:28:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:28:21,028 INFO L225 Difference]: With dead ends: 83 [2020-09-24 18:28:21,029 INFO L226 Difference]: Without dead ends: 68 [2020-09-24 18:28:21,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:28:21,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-24 18:28:21,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-24 18:28:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 18:28:21,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-24 18:28:21,068 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-24 18:28:21,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:28:21,069 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-24 18:28:21,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:28:21,069 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-24 18:28:21,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 18:28:21,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:28:21,074 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] [2020-09-24 18:28:21,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:28:21,076 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:28:21,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:28:21,077 INFO L82 PathProgramCache]: Analyzing trace with hash 215899159, now seen corresponding path program 1 times [2020-09-24 18:28:21,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:28:21,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858651345] [2020-09-24 18:28:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:28:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:21,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:21,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:21,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:22,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:22,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 18:28:22,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:28:22,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1664 [2020-09-24 18:28:22,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:22,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:28:22,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 18:28:22,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:28:22,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:28:22,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:28:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:22,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:22,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:22,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:28:22,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:28:22,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:28:22,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:22,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:22,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:28:22,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:22,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:28:22,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:28:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:22,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:22,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:22,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 18:28:22,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:28:22,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 18:28:22,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:22,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:28:22,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 18:28:22,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:28:22,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:28:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:28:22,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858651345] [2020-09-24 18:28:22,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:28:22,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 18:28:22,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073567743] [2020-09-24 18:28:22,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:28:22,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:28:22,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:28:22,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:28:22,891 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 7 states. [2020-09-24 18:28:23,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:28:23,243 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2020-09-24 18:28:23,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 18:28:23,244 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-24 18:28:23,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:28:23,245 INFO L225 Difference]: With dead ends: 83 [2020-09-24 18:28:23,245 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 18:28:23,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 18:28:23,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 18:28:23,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-09-24 18:28:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-24 18:28:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-09-24 18:28:23,266 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 36 [2020-09-24 18:28:23,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:28:23,267 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-09-24 18:28:23,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:28:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-09-24 18:28:23,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 18:28:23,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:28:23,271 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 18:28:23,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:28:23,272 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:28:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:28:23,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1068819611, now seen corresponding path program 1 times [2020-09-24 18:28:23,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:28:23,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658244876] [2020-09-24 18:28:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:28:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:23,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:23,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:23,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:24,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:25,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:28,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:28,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 18:28:28,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:28:28,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 18:28:28,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:28,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:28:28,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-24 18:28:28,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 18:28:28,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:28:28,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:28:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:28,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:28,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:28,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:28:28,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:28:28,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 18:28:28,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:28,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:28,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:28:28,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:28,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:28:28,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:28:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:28,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:28,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:28,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:28,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 18:28:28,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:28:28,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-24 18:28:28,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:28,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:28,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:28:28,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:28,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:28:28,487 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 18:28:28,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658244876] [2020-09-24 18:28:28,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:28:28,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:28:28,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55074360] [2020-09-24 18:28:28,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:28:28,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:28:28,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:28:28,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:28:28,492 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 7 states. [2020-09-24 18:28:28,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:28:28,782 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2020-09-24 18:28:28,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 18:28:28,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-24 18:28:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:28:28,785 INFO L225 Difference]: With dead ends: 90 [2020-09-24 18:28:28,785 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 18:28:28,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 18:28:28,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 18:28:28,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2020-09-24 18:28:28,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 18:28:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-09-24 18:28:28,808 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 42 [2020-09-24 18:28:28,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:28:28,808 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-09-24 18:28:28,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:28:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-09-24 18:28:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 18:28:28,811 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:28:28,811 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 18:28:28,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:28:28,812 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:28:28,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:28:28,815 INFO L82 PathProgramCache]: Analyzing trace with hash 589608213, now seen corresponding path program 2 times [2020-09-24 18:28:28,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:28:28,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131620503] [2020-09-24 18:28:28,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:28:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:28,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:28,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:28,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:30,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:31,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:32,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:33,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:33,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 18:28:33,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:28:33,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 18:28:33,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:33,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:28:33,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 18:28:33,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 18:28:33,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:28:33,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:28:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:33,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:33,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:33,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:28:33,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:28:33,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:28:33,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:33,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:33,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:28:33,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:33,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:28:33,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:28:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:33,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:33,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:33,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 18:28:33,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:28:33,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-24 18:28:33,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:33,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:28:33,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 18:28:33,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 18:28:33,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:28:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 18:28:34,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131620503] [2020-09-24 18:28:34,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:28:34,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 18:28:34,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890931195] [2020-09-24 18:28:34,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 18:28:34,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:28:34,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 18:28:34,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:28:34,132 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 9 states. [2020-09-24 18:28:34,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:28:34,488 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2020-09-24 18:28:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:28:34,489 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-24 18:28:34,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:28:34,490 INFO L225 Difference]: With dead ends: 107 [2020-09-24 18:28:34,490 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 18:28:34,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-24 18:28:34,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 18:28:34,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-09-24 18:28:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-24 18:28:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-09-24 18:28:34,500 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 49 [2020-09-24 18:28:34,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:28:34,500 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-09-24 18:28:34,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 18:28:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-09-24 18:28:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 18:28:34,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:28:34,502 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2020-09-24 18:28:34,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:28:34,503 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:28:34,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:28:34,503 INFO L82 PathProgramCache]: Analyzing trace with hash 92742417, now seen corresponding path program 3 times [2020-09-24 18:28:34,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:28:34,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870172980] [2020-09-24 18:28:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:28:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:34,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:34,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:34,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:34,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:35,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:39,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:39,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:39,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 18:28:39,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:28:39,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 18:28:39,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:39,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:28:39,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 18:28:39,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 18:28:39,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:28:39,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:28:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:39,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:39,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:39,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:28:39,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:28:39,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:28:39,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:39,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:39,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:28:39,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:39,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:28:39,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:28:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:39,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:39,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:39,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:39,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:28:39,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:28:39,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-24 18:28:39,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:39,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:39,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:28:39,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:39,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:28:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 18:28:39,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870172980] [2020-09-24 18:28:39,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:28:39,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 18:28:39,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374221990] [2020-09-24 18:28:39,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 18:28:39,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:28:39,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 18:28:39,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:28:39,764 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 9 states. [2020-09-24 18:28:40,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:28:40,026 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2020-09-24 18:28:40,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 18:28:40,027 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-09-24 18:28:40,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:28:40,028 INFO L225 Difference]: With dead ends: 104 [2020-09-24 18:28:40,028 INFO L226 Difference]: Without dead ends: 89 [2020-09-24 18:28:40,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-24 18:28:40,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-24 18:28:40,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2020-09-24 18:28:40,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-24 18:28:40,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-09-24 18:28:40,042 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 55 [2020-09-24 18:28:40,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:28:40,042 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-09-24 18:28:40,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 18:28:40,042 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-09-24 18:28:40,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 18:28:40,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:28:40,044 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 18:28:40,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:28:40,045 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:28:40,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:28:40,045 INFO L82 PathProgramCache]: Analyzing trace with hash -138713633, now seen corresponding path program 4 times [2020-09-24 18:28:40,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:28:40,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140850089] [2020-09-24 18:28:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:28:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:40,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:40,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:40,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:40,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:40,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:45,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:45,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 18:28:45,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:28:45,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-24 18:28:45,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:45,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 18:28:45,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 18:28:45,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 18:28:45,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:28:45,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:28:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:45,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:45,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:45,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:28:45,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:28:45,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:28:45,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:45,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:45,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:28:45,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:45,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:28:45,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:28:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:45,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:45,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:45,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:28:45,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:28:45,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-09-24 18:28:45,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 18:28:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 18:28:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 18:28:45,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:28:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-24 18:28:45,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140850089] [2020-09-24 18:28:45,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:28:45,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 18:28:45,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108721021] [2020-09-24 18:28:45,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 18:28:45,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:28:45,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 18:28:45,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:28:45,326 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 11 states. [2020-09-24 18:28:45,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:28:45,725 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2020-09-24 18:28:45,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 18:28:45,725 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-09-24 18:28:45,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:28:45,727 INFO L225 Difference]: With dead ends: 131 [2020-09-24 18:28:45,727 INFO L226 Difference]: Without dead ends: 85 [2020-09-24 18:28:45,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-09-24 18:28:45,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-24 18:28:45,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-09-24 18:28:45,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 18:28:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-09-24 18:28:45,736 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 62 [2020-09-24 18:28:45,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:28:45,736 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-09-24 18:28:45,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 18:28:45,736 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-09-24 18:28:45,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-24 18:28:45,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:28:45,738 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 18:28:45,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 18:28:45,738 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:28:45,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:28:45,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1237619043, now seen corresponding path program 5 times [2020-09-24 18:28:45,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:28:45,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772545393] [2020-09-24 18:28:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:28:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:45,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:45,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:45,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:46,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:46,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:46,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:47,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:50,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:50,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:50,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:50,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-24 18:28:50,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 18:28:50,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 18:28:50,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 18:28:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 18:28:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 18:28:50,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:28:50,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:28:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:50,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:50,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:50,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:28:50,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:28:50,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:28:50,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:50,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:50,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:28:50,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:50,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:28:50,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:28:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:50,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:50,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:51,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:51,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 18:28:51,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:28:51,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-09-24 18:28:51,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:28:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:51,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:28:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-24 18:28:51,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772545393] [2020-09-24 18:28:51,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:28:51,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 18:28:51,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156852977] [2020-09-24 18:28:51,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 18:28:51,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:28:51,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 18:28:51,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:28:51,052 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 11 states. [2020-09-24 18:28:51,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:28:51,413 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2020-09-24 18:28:51,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 18:28:51,413 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-09-24 18:28:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:28:51,415 INFO L225 Difference]: With dead ends: 119 [2020-09-24 18:28:51,416 INFO L226 Difference]: Without dead ends: 104 [2020-09-24 18:28:51,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-24 18:28:51,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-24 18:28:51,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2020-09-24 18:28:51,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-24 18:28:51,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-09-24 18:28:51,424 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 68 [2020-09-24 18:28:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:28:51,424 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-09-24 18:28:51,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 18:28:51,425 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-09-24 18:28:51,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-24 18:28:51,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:28:51,426 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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 18:28:51,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 18:28:51,426 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:28:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:28:51,427 INFO L82 PathProgramCache]: Analyzing trace with hash -330918067, now seen corresponding path program 6 times [2020-09-24 18:28:51,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:28:51,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115796991] [2020-09-24 18:28:51,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:28:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:51,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:51,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:51,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:51,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:51,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:52,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:52,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:52,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:52,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:52,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:56,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:56,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-24 18:28:56,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 18:28:56,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 18:28:56,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:56,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 18:28:56,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 18:28:56,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 18:28:56,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:28:56,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:28:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:56,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:56,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:56,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:28:56,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:28:56,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:28:56,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:56,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:56,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:28:56,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:56,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:28:56,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:28:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:56,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:56,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:56,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:28:56,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 18:28:56,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:28:56,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-09-24 18:28:56,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:28:56,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:28:56,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:28:56,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:28:56,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:28:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-24 18:28:56,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115796991] [2020-09-24 18:28:56,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:28:56,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 18:28:56,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014928009] [2020-09-24 18:28:56,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 18:28:56,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:28:56,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 18:28:56,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-24 18:28:56,837 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 13 states. [2020-09-24 18:28:57,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:28:57,296 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2020-09-24 18:28:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 18:28:57,297 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2020-09-24 18:28:57,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:28:57,299 INFO L225 Difference]: With dead ends: 128 [2020-09-24 18:28:57,300 INFO L226 Difference]: Without dead ends: 113 [2020-09-24 18:28:57,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-09-24 18:28:57,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-24 18:28:57,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2020-09-24 18:28:57,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-24 18:28:57,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2020-09-24 18:28:57,312 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 75 [2020-09-24 18:28:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:28:57,312 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2020-09-24 18:28:57,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 18:28:57,312 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2020-09-24 18:28:57,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-24 18:28:57,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:28:57,314 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 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 18:28:57,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 18:28:57,314 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:28:57,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:28:57,314 INFO L82 PathProgramCache]: Analyzing trace with hash 758642211, now seen corresponding path program 7 times [2020-09-24 18:28:57,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:28:57,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082984690] [2020-09-24 18:28:57,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:28:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:28:57,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:57,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:57,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:57,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:57,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:57,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:28:58,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:00,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:02,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:02,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-24 18:29:02,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:29:02,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-24 18:29:02,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:02,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 18:29:02,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 18:29:02,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 18:29:02,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:02,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:02,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:02,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:02,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:29:02,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:02,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:29:02,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:02,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:02,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:02,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:02,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:02,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:29:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:02,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:02,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:02,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 18:29:02,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:02,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-09-24 18:29:02,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:02,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 18:29:02,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 18:29:02,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 18:29:02,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-24 18:29:02,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082984690] [2020-09-24 18:29:02,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:02,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 18:29:02,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858917204] [2020-09-24 18:29:02,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 18:29:02,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:02,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 18:29:02,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-24 18:29:02,678 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand 13 states. [2020-09-24 18:29:03,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:03,151 INFO L93 Difference]: Finished difference Result 173 states and 189 transitions. [2020-09-24 18:29:03,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 18:29:03,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-09-24 18:29:03,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:03,153 INFO L225 Difference]: With dead ends: 173 [2020-09-24 18:29:03,154 INFO L226 Difference]: Without dead ends: 109 [2020-09-24 18:29:03,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2020-09-24 18:29:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-24 18:29:03,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-09-24 18:29:03,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-24 18:29:03,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2020-09-24 18:29:03,163 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 82 [2020-09-24 18:29:03,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:03,163 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2020-09-24 18:29:03,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 18:29:03,164 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2020-09-24 18:29:03,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-24 18:29:03,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:03,165 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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 18:29:03,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 18:29:03,165 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:03,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:03,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1356609447, now seen corresponding path program 8 times [2020-09-24 18:29:03,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:03,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874617226] [2020-09-24 18:29:03,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:03,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:03,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:03,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:03,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:03,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:04,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:05,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:05,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking...