/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:18:21,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:18:21,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:18:21,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:18:21,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:18:21,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:18:21,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:18:21,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:18:21,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:18:21,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:18:21,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:18:21,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:18:21,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:18:21,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:18:21,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:18:21,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:18:21,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:18:21,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:18:21,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:18:21,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:18:21,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:18:21,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:18:21,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:18:21,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:18:21,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:18:21,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:18:21,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:18:21,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:18:21,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:18:21,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:18:21,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:18:21,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:18:21,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:18:21,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:18:21,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:18:21,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:18:21,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:18:21,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:18:21,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:18:21,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:18:21,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:18:21,461 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 10:18:21,509 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:18:21,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:18:21,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:18:21,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:18:21,515 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:18:21,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:18:21,516 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:18:21,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:18:21,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:18:21,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:18:21,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:18:21,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:18:21,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:18:21,519 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:18:21,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:18:21,520 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:18:21,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:18:21,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:18:21,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:18:21,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:18:21,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:18:21,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:18:21,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:18:21,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:18:21,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:18:21,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:18:21,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:18:21,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:18:21,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:18:21,524 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:18:21,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:18:21,938 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:18:21,942 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:18:21,945 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:18:21,949 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:18:21,950 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-1.i [2020-10-12 10:18:22,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebf4b9b03/96d3574460fb4cadaae0501e7726432e/FLAG3ee151021 [2020-10-12 10:18:22,539 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:18:22,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-1.i [2020-10-12 10:18:22,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebf4b9b03/96d3574460fb4cadaae0501e7726432e/FLAG3ee151021 [2020-10-12 10:18:22,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebf4b9b03/96d3574460fb4cadaae0501e7726432e [2020-10-12 10:18:22,893 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:18:22,895 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:18:22,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:18:22,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:18:22,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:18:22,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:18:22" (1/1) ... [2020-10-12 10:18:22,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d198e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:18:22, skipping insertion in model container [2020-10-12 10:18:22,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:18:22" (1/1) ... [2020-10-12 10:18:22,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:18:22,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:18:23,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:18:23,234 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:18:23,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:18:23,387 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:18:23,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:18:23 WrapperNode [2020-10-12 10:18:23,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:18:23,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:18:23,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:18:23,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:18:23,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:18:23" (1/1) ... [2020-10-12 10:18:23,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:18:23" (1/1) ... [2020-10-12 10:18:23,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:18:23" (1/1) ... [2020-10-12 10:18:23,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:18:23" (1/1) ... [2020-10-12 10:18:23,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:18:23" (1/1) ... [2020-10-12 10:18:23,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:18:23" (1/1) ... [2020-10-12 10:18:23,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:18:23" (1/1) ... [2020-10-12 10:18:23,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:18:23,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:18:23,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:18:23,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:18:23,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:18:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:18:23,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:18:23,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:18:23,546 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:18:23,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:18:23,546 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 10:18:23,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:18:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:18:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:18:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:18:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 10:18:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:18:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:18:23,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 10:18:23,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 10:18:23,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:18:23,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:18:23,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:18:23,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:18:23,869 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:18:23,870 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 10:18:23,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:18:23 BoogieIcfgContainer [2020-10-12 10:18:23,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:18:23,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:18:23,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:18:23,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:18:23,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:18:22" (1/3) ... [2020-10-12 10:18:23,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e69a52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:18:23, skipping insertion in model container [2020-10-12 10:18:23,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:18:23" (2/3) ... [2020-10-12 10:18:23,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e69a52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:18:23, skipping insertion in model container [2020-10-12 10:18:23,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:18:23" (3/3) ... [2020-10-12 10:18:23,896 INFO L109 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-1.i [2020-10-12 10:18:23,910 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:18:23,922 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:18:23,948 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:18:23,978 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:18:23,979 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:18:23,979 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:18:23,979 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:18:23,980 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:18:23,980 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:18:23,980 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:18:23,981 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:18:24,004 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-12 10:18:24,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 10:18:24,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:24,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:24,014 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:24,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:24,022 INFO L82 PathProgramCache]: Analyzing trace with hash 554320188, now seen corresponding path program 1 times [2020-10-12 10:18:24,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:24,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912776316] [2020-10-12 10:18:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:24,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:24,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:24,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:24,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 10:18:24,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:18:24,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 702 [2020-10-12 10:18:24,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:24,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:18:24,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:18:24,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 10:18:24,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 10:18:25,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:25,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:25,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:25,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:25,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:25,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 10:18:25,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:25,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:25,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:25,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:18:25,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 19 [2020-10-12 10:18:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:18:25,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912776316] [2020-10-12 10:18:25,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:18:25,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 10:18:25,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055231696] [2020-10-12 10:18:25,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:18:25,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:25,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:18:25,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:18:25,192 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 6 states. [2020-10-12 10:18:25,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:25,530 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-10-12 10:18:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:18:25,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-12 10:18:25,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:25,543 INFO L225 Difference]: With dead ends: 65 [2020-10-12 10:18:25,544 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 10:18:25,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:18:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 10:18:25,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-10-12 10:18:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 10:18:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-10-12 10:18:25,599 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 15 [2020-10-12 10:18:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:25,600 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-10-12 10:18:25,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:18:25,600 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-10-12 10:18:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 10:18:25,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:25,602 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] [2020-10-12 10:18:25,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:18:25,603 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:25,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:25,603 INFO L82 PathProgramCache]: Analyzing trace with hash 2023958242, now seen corresponding path program 1 times [2020-10-12 10:18:25,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:25,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755392235] [2020-10-12 10:18:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:25,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:25,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:25,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:26,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:26,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:26,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 10:18:26,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:18:26,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1182 [2020-10-12 10:18:26,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:26,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:18:26,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:18:26,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:18:26,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:18:27,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:27,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:27,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:27,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:27,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:27,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 10:18:27,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:18:27,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:18:27,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755392235] [2020-10-12 10:18:27,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:27,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:18:27,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86379375] [2020-10-12 10:18:27,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:18:27,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:27,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:18:27,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:18:27,249 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 10 states. [2020-10-12 10:18:27,842 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-12 10:18:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:28,206 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2020-10-12 10:18:28,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:18:28,207 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-12 10:18:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:28,209 INFO L225 Difference]: With dead ends: 59 [2020-10-12 10:18:28,209 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 10:18:28,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:18:28,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 10:18:28,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2020-10-12 10:18:28,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 10:18:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2020-10-12 10:18:28,235 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 20 [2020-10-12 10:18:28,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:28,236 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2020-10-12 10:18:28,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:18:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2020-10-12 10:18:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 10:18:28,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:28,239 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] [2020-10-12 10:18:28,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:18:28,240 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:28,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:28,240 INFO L82 PathProgramCache]: Analyzing trace with hash -240987022, now seen corresponding path program 1 times [2020-10-12 10:18:28,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:28,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781320648] [2020-10-12 10:18:28,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:28,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:28,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:28,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:28,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:28,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:28,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:29,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:29,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:30,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:30,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 10:18:30,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:18:30,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1747 [2020-10-12 10:18:30,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:30,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:18:30,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:18:30,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:18:30,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:18:30,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:30,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:30,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:30,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:30,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:30,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:18:30,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:30,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:30,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:30,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:18:30,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:18:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:18:30,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781320648] [2020-10-12 10:18:30,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:30,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:18:30,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954113983] [2020-10-12 10:18:30,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:18:30,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:30,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:18:30,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:18:30,345 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 12 states. [2020-10-12 10:18:30,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:30,712 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2020-10-12 10:18:30,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 10:18:30,712 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-12 10:18:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:30,714 INFO L225 Difference]: With dead ends: 74 [2020-10-12 10:18:30,714 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 10:18:30,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:18:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 10:18:30,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-12 10:18:30,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 10:18:30,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2020-10-12 10:18:30,740 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 21 [2020-10-12 10:18:30,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:30,740 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2020-10-12 10:18:30,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:18:30,740 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2020-10-12 10:18:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 10:18:30,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:30,742 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:30,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:18:30,742 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:30,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:30,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1384781915, now seen corresponding path program 1 times [2020-10-12 10:18:30,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:30,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37074582] [2020-10-12 10:18:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:30,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:30,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:30,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:30,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:30,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:31,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:32,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:32,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 10:18:32,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:18:32,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1928 [2020-10-12 10:18:32,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:32,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:18:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:18:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:18:32,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:33,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:33,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:33,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:33,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:33,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:33,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 10:18:33,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:33,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:18:33,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:18:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:18:33,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37074582] [2020-10-12 10:18:33,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:33,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:18:33,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640792191] [2020-10-12 10:18:33,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:18:33,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:33,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:18:33,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:18:33,234 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand 11 states. [2020-10-12 10:18:33,725 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-12 10:18:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:34,369 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2020-10-12 10:18:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:18:34,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-12 10:18:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:34,371 INFO L225 Difference]: With dead ends: 71 [2020-10-12 10:18:34,371 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 10:18:34,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:18:34,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 10:18:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-10-12 10:18:34,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 10:18:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-10-12 10:18:34,381 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 24 [2020-10-12 10:18:34,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:34,382 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-10-12 10:18:34,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:18:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2020-10-12 10:18:34,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 10:18:34,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:34,383 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:34,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:18:34,384 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:34,384 INFO L82 PathProgramCache]: Analyzing trace with hash 18209020, now seen corresponding path program 2 times [2020-10-12 10:18:34,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:34,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981975000] [2020-10-12 10:18:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:34,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:34,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:34,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:34,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:35,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:35,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:36,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:36,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 10:18:36,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:18:36,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1975 [2020-10-12 10:18:36,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:36,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:18:36,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:18:36,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:18:36,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:18:37,319 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-12 10:18:37,646 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-12 10:18:37,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:37,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:37,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:37,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:37,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:37,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 10:18:37,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:37,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:37,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:37,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:18:37,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:18:37,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981975000] [2020-10-12 10:18:37,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:37,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:18:37,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279643869] [2020-10-12 10:18:37,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:18:37,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:37,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:18:37,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:18:37,829 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 13 states. [2020-10-12 10:18:38,413 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2020-10-12 10:18:38,815 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-12 10:18:39,021 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-12 10:18:39,378 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-12 10:18:40,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:40,029 INFO L93 Difference]: Finished difference Result 88 states and 114 transitions. [2020-10-12 10:18:40,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:18:40,035 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-12 10:18:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:40,036 INFO L225 Difference]: With dead ends: 88 [2020-10-12 10:18:40,036 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 10:18:40,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:18:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 10:18:40,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-10-12 10:18:40,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 10:18:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2020-10-12 10:18:40,063 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 25 [2020-10-12 10:18:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:40,064 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2020-10-12 10:18:40,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:18:40,065 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2020-10-12 10:18:40,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 10:18:40,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:40,067 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:40,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:18:40,067 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:40,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:40,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1975935686, now seen corresponding path program 1 times [2020-10-12 10:18:40,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:40,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645756060] [2020-10-12 10:18:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:40,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:40,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:40,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:40,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:40,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:40,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:40,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:41,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:41,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:42,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:42,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 10:18:42,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:18:42,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2358 [2020-10-12 10:18:42,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:42,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:18:42,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:18:42,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:18:42,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:18:42,826 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-12 10:18:43,165 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-12 10:18:43,591 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 78 [2020-10-12 10:18:43,966 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 73 [2020-10-12 10:18:44,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:44,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:44,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:44,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:44,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:44,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:18:44,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:44,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:44,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:44,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:18:44,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:18:44,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645756060] [2020-10-12 10:18:44,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:44,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:18:44,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580768703] [2020-10-12 10:18:44,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:18:44,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:44,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:18:44,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:18:44,122 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand 12 states. [2020-10-12 10:18:44,809 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-10-12 10:18:45,026 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-12 10:18:45,312 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2020-10-12 10:18:45,566 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2020-10-12 10:18:46,393 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-10-12 10:18:46,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:46,999 INFO L93 Difference]: Finished difference Result 97 states and 128 transitions. [2020-10-12 10:18:47,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:18:47,000 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-12 10:18:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:47,002 INFO L225 Difference]: With dead ends: 97 [2020-10-12 10:18:47,002 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 10:18:47,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:18:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 10:18:47,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2020-10-12 10:18:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 10:18:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2020-10-12 10:18:47,028 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 25 [2020-10-12 10:18:47,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:47,028 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2020-10-12 10:18:47,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:18:47,029 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2020-10-12 10:18:47,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 10:18:47,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:47,032 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:47,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:18:47,032 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:47,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2005296536, now seen corresponding path program 1 times [2020-10-12 10:18:47,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:47,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077084864] [2020-10-12 10:18:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:47,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:47,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:47,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:47,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:47,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:48,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:48,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:49,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:49,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 10:18:49,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:18:49,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2109 [2020-10-12 10:18:49,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:49,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:18:49,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:18:49,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:18:49,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:49,507 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-12 10:18:49,754 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-12 10:18:50,115 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-10-12 10:18:50,343 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-12 10:18:50,829 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 82 [2020-10-12 10:18:51,292 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-10-12 10:18:51,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:51,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:51,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:51,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:51,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:51,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-12 10:18:51,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:51,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:51,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:51,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:18:51,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:18:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:18:51,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077084864] [2020-10-12 10:18:51,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:51,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:18:51,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091104206] [2020-10-12 10:18:51,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:18:51,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:51,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:18:51,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:18:51,724 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand 17 states. [2020-10-12 10:18:52,507 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-12 10:18:53,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:53,140 INFO L93 Difference]: Finished difference Result 139 states and 185 transitions. [2020-10-12 10:18:53,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 10:18:53,141 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-12 10:18:53,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:53,144 INFO L225 Difference]: With dead ends: 139 [2020-10-12 10:18:53,144 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 10:18:53,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:18:53,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 10:18:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 74. [2020-10-12 10:18:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 10:18:53,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2020-10-12 10:18:53,164 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 26 [2020-10-12 10:18:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:53,165 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2020-10-12 10:18:53,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:18:53,165 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2020-10-12 10:18:53,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 10:18:53,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:53,167 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:53,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:18:53,167 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:53,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:53,168 INFO L82 PathProgramCache]: Analyzing trace with hash 339322196, now seen corresponding path program 2 times [2020-10-12 10:18:53,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:53,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750004660] [2020-10-12 10:18:53,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:53,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:53,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:53,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:53,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:53,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:54,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:55,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:55,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 10:18:55,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:18:55,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2286 [2020-10-12 10:18:55,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:55,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:18:55,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:18:55,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:18:55,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:55,726 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-12 10:18:55,878 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-12 10:18:56,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:56,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:56,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:56,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:56,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:56,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:18:56,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:56,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:56,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:56,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:18:56,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:18:56,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750004660] [2020-10-12 10:18:56,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:56,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:18:56,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228729840] [2020-10-12 10:18:56,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:18:56,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:56,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:18:56,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:18:56,295 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand 12 states. [2020-10-12 10:18:56,857 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-12 10:18:57,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:57,491 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2020-10-12 10:18:57,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:18:57,492 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 10:18:57,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:57,493 INFO L225 Difference]: With dead ends: 98 [2020-10-12 10:18:57,493 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 10:18:57,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:18:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 10:18:57,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2020-10-12 10:18:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 10:18:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2020-10-12 10:18:57,507 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 28 [2020-10-12 10:18:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:57,508 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2020-10-12 10:18:57,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:18:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2020-10-12 10:18:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 10:18:57,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:57,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:57,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:18:57,510 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:57,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:57,511 INFO L82 PathProgramCache]: Analyzing trace with hash 532819317, now seen corresponding path program 3 times [2020-10-12 10:18:57,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:57,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034940870] [2020-10-12 10:18:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:57,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:57,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:57,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:57,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:57,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:57,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:58,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:58,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:02,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:02,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 10:19:02,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:19:02,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:19:02,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:02,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:19:02,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:19:02,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:19:02,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:03,695 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2020-10-12 10:19:04,122 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 71 [2020-10-12 10:19:04,689 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 80 [2020-10-12 10:19:04,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:04,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:04,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:04,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:04,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:04,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 10:19:04,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:04,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:19:04,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:04,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:19:04,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:19:04,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034940870] [2020-10-12 10:19:04,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:04,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:19:04,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601051040] [2020-10-12 10:19:04,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:19:04,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:04,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:19:04,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:19:04,967 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand 14 states. [2020-10-12 10:19:05,257 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 48 [2020-10-12 10:19:05,962 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2020-10-12 10:19:06,242 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2020-10-12 10:19:09,375 WARN L193 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 147 DAG size of output: 117 [2020-10-12 10:19:13,354 WARN L193 SmtUtils]: Spent 3.53 s on a formula simplification. DAG size of input: 149 DAG size of output: 119 [2020-10-12 10:19:15,180 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-10-12 10:19:16,318 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-10-12 10:19:17,211 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2020-10-12 10:19:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:18,031 INFO L93 Difference]: Finished difference Result 114 states and 149 transitions. [2020-10-12 10:19:18,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:19:18,032 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-12 10:19:18,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:18,033 INFO L225 Difference]: With dead ends: 114 [2020-10-12 10:19:18,033 INFO L226 Difference]: Without dead ends: 101 [2020-10-12 10:19:18,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:19:18,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-12 10:19:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-12 10:19:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 10:19:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2020-10-12 10:19:18,045 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 29 [2020-10-12 10:19:18,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:18,046 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2020-10-12 10:19:18,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:19:18,046 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2020-10-12 10:19:18,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 10:19:18,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:18,048 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:18,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:19:18,048 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:18,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:18,048 INFO L82 PathProgramCache]: Analyzing trace with hash -622827742, now seen corresponding path program 3 times [2020-10-12 10:19:18,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:18,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190384233] [2020-10-12 10:19:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:18,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:18,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:18,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:18,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:18,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:18,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:19,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:20,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:21,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:21,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 10:19:21,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:19:21,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3104 [2020-10-12 10:19:21,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:21,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:19:21,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:19:21,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:19:21,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:21,892 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-12 10:19:22,038 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-12 10:19:22,222 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-12 10:19:22,703 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2020-10-12 10:19:23,138 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-10-12 10:19:24,180 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2020-10-12 10:19:26,204 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 135 DAG size of output: 91 [2020-10-12 10:19:27,457 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 85 [2020-10-12 10:19:27,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:27,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:27,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:27,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:27,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:27,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:19:27,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:27,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:19:27,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:27,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:19:27,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:19:27,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190384233] [2020-10-12 10:19:27,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:27,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:19:27,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623913399] [2020-10-12 10:19:27,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:19:27,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:27,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:19:27,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:19:27,698 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand 16 states. [2020-10-12 10:19:28,564 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2020-10-12 10:19:28,940 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 52 [2020-10-12 10:19:29,326 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-12 10:19:29,708 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-12 10:19:30,047 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-12 10:19:30,407 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-12 10:19:31,138 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 54 [2020-10-12 10:19:31,758 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-12 10:19:32,992 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 84 [2020-10-12 10:19:34,199 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 81 [2020-10-12 10:19:35,749 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-12 10:19:36,766 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-12 10:19:37,770 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-12 10:19:42,675 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 110 DAG size of output: 104 [2020-10-12 10:19:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:47,052 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2020-10-12 10:19:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:19:47,055 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-10-12 10:19:47,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:47,057 INFO L225 Difference]: With dead ends: 146 [2020-10-12 10:19:47,057 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 10:19:47,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:19:47,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 10:19:47,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 99. [2020-10-12 10:19:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 10:19:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 137 transitions. [2020-10-12 10:19:47,075 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 137 transitions. Word has length 30 [2020-10-12 10:19:47,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:47,076 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 137 transitions. [2020-10-12 10:19:47,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:19:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 137 transitions. [2020-10-12 10:19:47,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 10:19:47,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:47,078 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:47,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:19:47,078 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:47,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1895578272, now seen corresponding path program 2 times [2020-10-12 10:19:47,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:47,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104428497] [2020-10-12 10:19:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:47,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:47,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:47,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:47,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:48,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:50,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:50,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:51,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:51,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 10:19:51,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:19:51,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4146 [2020-10-12 10:19:51,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:51,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:19:51,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:19:51,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:19:51,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:19:51,923 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2020-10-12 10:19:52,099 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-10-12 10:19:52,251 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-12 10:19:52,442 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-10-12 10:19:53,017 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-10-12 10:19:53,692 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 84 [2020-10-12 10:19:54,715 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 90 [2020-10-12 10:19:55,680 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-10-12 10:19:57,542 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 140 DAG size of output: 113 [2020-10-12 10:19:59,178 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 129 DAG size of output: 107 [2020-10-12 10:19:59,434 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2020-10-12 10:19:59,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:59,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:59,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:59,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:59,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:59,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:19:59,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:59,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:19:59,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:59,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:19:59,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:20:00,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104428497] [2020-10-12 10:20:00,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:00,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:20:00,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651016929] [2020-10-12 10:20:00,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:20:00,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:00,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:20:00,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:20:00,007 INFO L87 Difference]: Start difference. First operand 99 states and 137 transitions. Second operand 21 states. [2020-10-12 10:20:00,559 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 42 [2020-10-12 10:20:01,856 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 38 [2020-10-12 10:20:02,594 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-12 10:20:04,924 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-12 10:20:05,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:05,629 INFO L93 Difference]: Finished difference Result 298 states and 399 transitions. [2020-10-12 10:20:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:20:05,632 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-10-12 10:20:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:05,635 INFO L225 Difference]: With dead ends: 298 [2020-10-12 10:20:05,635 INFO L226 Difference]: Without dead ends: 222 [2020-10-12 10:20:05,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:20:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-12 10:20:05,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 123. [2020-10-12 10:20:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-12 10:20:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 170 transitions. [2020-10-12 10:20:05,653 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 170 transitions. Word has length 32 [2020-10-12 10:20:05,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:05,653 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 170 transitions. [2020-10-12 10:20:05,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:20:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 170 transitions. [2020-10-12 10:20:05,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 10:20:05,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:05,662 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:05,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:20:05,662 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:05,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:05,663 INFO L82 PathProgramCache]: Analyzing trace with hash 90139938, now seen corresponding path program 1 times [2020-10-12 10:20:05,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:05,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770653531] [2020-10-12 10:20:05,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:05,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:05,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:05,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:05,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:06,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:07,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:08,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:08,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 10:20:08,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:20:08,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2952 [2020-10-12 10:20:08,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:08,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:20:08,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:20:08,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:20:08,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:10,319 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-12 10:20:11,060 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-12 10:20:12,329 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2020-10-12 10:20:13,956 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-10-12 10:20:16,543 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 133 DAG size of output: 95 [2020-10-12 10:20:19,026 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 115 DAG size of output: 89 [2020-10-12 10:20:19,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:19,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:19,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:19,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:19,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:19,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:20:19,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:19,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:20:19,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:19,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:20:19,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:20:19,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770653531] [2020-10-12 10:20:19,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:19,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:20:19,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163750450] [2020-10-12 10:20:19,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:20:19,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:19,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:20:19,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:20:19,902 INFO L87 Difference]: Start difference. First operand 123 states and 170 transitions. Second operand 20 states. [2020-10-12 10:20:20,618 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 46 [2020-10-12 10:20:21,795 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-12 10:20:22,486 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2020-10-12 10:20:26,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:26,789 INFO L93 Difference]: Finished difference Result 266 states and 357 transitions. [2020-10-12 10:20:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:20:26,792 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2020-10-12 10:20:26,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:26,796 INFO L225 Difference]: With dead ends: 266 [2020-10-12 10:20:26,796 INFO L226 Difference]: Without dead ends: 239 [2020-10-12 10:20:26,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:20:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-12 10:20:26,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 146. [2020-10-12 10:20:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 10:20:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 204 transitions. [2020-10-12 10:20:26,820 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 204 transitions. Word has length 32 [2020-10-12 10:20:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:26,820 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 204 transitions. [2020-10-12 10:20:26,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:20:26,821 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 204 transitions. [2020-10-12 10:20:26,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 10:20:26,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:26,823 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:26,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:20:26,823 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:26,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:26,824 INFO L82 PathProgramCache]: Analyzing trace with hash 827893711, now seen corresponding path program 1 times [2020-10-12 10:20:26,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:26,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772256562] [2020-10-12 10:20:26,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:26,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:26,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:26,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:26,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:26,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:26,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:30,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:30,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 10:20:30,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:20:30,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3369 [2020-10-12 10:20:30,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:30,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:20:30,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:20:30,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:20:30,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:30,716 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-10-12 10:20:31,012 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-12 10:20:31,160 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2020-10-12 10:20:31,318 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2020-10-12 10:20:31,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:31,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:31,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:31,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:31,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:31,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:20:31,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:31,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:20:31,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:31,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:20:31,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 10:20:31,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772256562] [2020-10-12 10:20:31,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:31,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:20:31,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810129757] [2020-10-12 10:20:31,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:20:31,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:31,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:20:31,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:20:31,425 INFO L87 Difference]: Start difference. First operand 146 states and 204 transitions. Second operand 10 states. [2020-10-12 10:20:31,875 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2020-10-12 10:20:32,156 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-10-12 10:20:32,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:32,675 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2020-10-12 10:20:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:20:32,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-12 10:20:32,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:32,679 INFO L225 Difference]: With dead ends: 174 [2020-10-12 10:20:32,680 INFO L226 Difference]: Without dead ends: 146 [2020-10-12 10:20:32,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:20:32,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-12 10:20:32,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-10-12 10:20:32,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 10:20:32,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 203 transitions. [2020-10-12 10:20:32,694 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 203 transitions. Word has length 32 [2020-10-12 10:20:32,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:32,694 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 203 transitions. [2020-10-12 10:20:32,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:20:32,695 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 203 transitions. [2020-10-12 10:20:32,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 10:20:32,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:32,697 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:32,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:20:32,697 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:32,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:32,697 INFO L82 PathProgramCache]: Analyzing trace with hash -857916129, now seen corresponding path program 1 times [2020-10-12 10:20:32,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:32,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761795806] [2020-10-12 10:20:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:32,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:32,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:32,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:32,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:32,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:32,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:33,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:35,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:35,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:20:35,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:20:35,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3082 [2020-10-12 10:20:35,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:35,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:20:35,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:20:35,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:20:35,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:36,099 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-12 10:20:36,281 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-12 10:20:36,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:36,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:36,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:36,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:36,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:36,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:20:36,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:36,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:20:36,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:36,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:20:36,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 10:20:36,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761795806] [2020-10-12 10:20:36,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:36,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:20:36,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565950300] [2020-10-12 10:20:36,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:20:36,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:36,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:20:36,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:20:36,509 INFO L87 Difference]: Start difference. First operand 146 states and 203 transitions. Second operand 13 states. [2020-10-12 10:20:37,993 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-12 10:20:38,232 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-12 10:20:38,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:38,555 INFO L93 Difference]: Finished difference Result 173 states and 232 transitions. [2020-10-12 10:20:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:20:38,557 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-12 10:20:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:38,559 INFO L225 Difference]: With dead ends: 173 [2020-10-12 10:20:38,559 INFO L226 Difference]: Without dead ends: 147 [2020-10-12 10:20:38,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:20:38,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-12 10:20:38,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-10-12 10:20:38,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 10:20:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 202 transitions. [2020-10-12 10:20:38,580 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 202 transitions. Word has length 33 [2020-10-12 10:20:38,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:38,581 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 202 transitions. [2020-10-12 10:20:38,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:20:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 202 transitions. [2020-10-12 10:20:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 10:20:38,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:38,582 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:38,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:20:38,583 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:38,583 INFO L82 PathProgramCache]: Analyzing trace with hash -991929635, now seen corresponding path program 1 times [2020-10-12 10:20:38,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:38,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103722221] [2020-10-12 10:20:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:38,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:38,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:38,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:38,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:38,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:38,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:38,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:41,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:41,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:20:41,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:20:41,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2720 [2020-10-12 10:20:41,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:41,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:20:41,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 10:20:41,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:20:41,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:41,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:41,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:41,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:41,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:41,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:41,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:20:41,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:41,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:41,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:41,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:41,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:20:41,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103722221] [2020-10-12 10:20:41,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:41,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:20:41,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069221955] [2020-10-12 10:20:41,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:20:41,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:41,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:20:41,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:20:41,524 INFO L87 Difference]: Start difference. First operand 146 states and 202 transitions. Second operand 8 states. [2020-10-12 10:20:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:42,451 INFO L93 Difference]: Finished difference Result 215 states and 297 transitions. [2020-10-12 10:20:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:20:42,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-12 10:20:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:42,457 INFO L225 Difference]: With dead ends: 215 [2020-10-12 10:20:42,457 INFO L226 Difference]: Without dead ends: 189 [2020-10-12 10:20:42,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:20:42,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-12 10:20:42,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 156. [2020-10-12 10:20:42,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-12 10:20:42,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 209 transitions. [2020-10-12 10:20:42,476 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 209 transitions. Word has length 33 [2020-10-12 10:20:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:42,477 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 209 transitions. [2020-10-12 10:20:42,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:20:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 209 transitions. [2020-10-12 10:20:42,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 10:20:42,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:42,478 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:42,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:20:42,478 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:42,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:42,478 INFO L82 PathProgramCache]: Analyzing trace with hash -58338500, now seen corresponding path program 1 times [2020-10-12 10:20:42,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:42,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091086969] [2020-10-12 10:20:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:42,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:42,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:42,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:42,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:42,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:42,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:42,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:42,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:43,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:43,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:43,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:43,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:43,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:43,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:43,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:43,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:44,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:44,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:44,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:44,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:44,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:44,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:44,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:44,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:44,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:44,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:45,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:45,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:45,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:45,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:45,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:45,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:45,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:45,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:46,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:46,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:46,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:46,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:46,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:46,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:46,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:46,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:46,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:46,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:47,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:47,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:47,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:47,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:47,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:47,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:47,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 10:20:47,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 49 [2020-10-12 10:20:47,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-12 10:20:47,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:47,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:20:47,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:20:47,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:20:47,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:11,617 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2020-10-12 10:21:11,878 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2020-10-12 10:21:13,688 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 147 DAG size of output: 82 [2020-10-12 10:21:18,223 WARN L193 SmtUtils]: Spent 3.43 s on a formula simplification. DAG size of input: 149 DAG size of output: 87 [2020-10-12 10:21:35,851 WARN L193 SmtUtils]: Spent 13.62 s on a formula simplification. DAG size of input: 241 DAG size of output: 112 [2020-10-12 10:22:19,954 WARN L193 SmtUtils]: Spent 35.37 s on a formula simplification. DAG size of input: 242 DAG size of output: 117