/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:11:27,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:11:27,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:11:27,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:11:27,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:11:27,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:11:27,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:11:27,540 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:11:27,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:11:27,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:11:27,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:11:27,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:11:27,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:11:27,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:11:27,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:11:27,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:11:27,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:11:27,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:11:27,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:11:27,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:11:27,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:11:27,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:11:27,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:11:27,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:11:27,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:11:27,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:11:27,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:11:27,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:11:27,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:11:27,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:11:27,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:11:27,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:11:27,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:11:27,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:11:27,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:11:27,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:11:27,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:11:27,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:11:27,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:11:27,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:11:27,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:11:27,601 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 18:11:27,647 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:11:27,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:11:27,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:11:27,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:11:27,651 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:11:27,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:11:27,652 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:11:27,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:11:27,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:11:27,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:11:27,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:11:27,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:11:27,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:11:27,655 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:11:27,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:11:27,655 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:11:27,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:11:27,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:11:27,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:11:27,657 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:11:27,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:11:27,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:11:27,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:11:27,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:11:27,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:11:27,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:11:27,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:11:27,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:11:27,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:11:27,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:11:28,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:11:28,190 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:11:28,194 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:11:28,196 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:11:28,197 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:11:28,198 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-09-24 18:11:28,275 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23ba782fc/5c83adeb8d764bb2a486ba4c72b1984e/FLAGb9620e367 [2020-09-24 18:11:28,804 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:11:28,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-09-24 18:11:28,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23ba782fc/5c83adeb8d764bb2a486ba4c72b1984e/FLAGb9620e367 [2020-09-24 18:11:29,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23ba782fc/5c83adeb8d764bb2a486ba4c72b1984e [2020-09-24 18:11:29,142 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:11:29,148 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:11:29,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:11:29,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:11:29,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:11:29,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2acd657e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29, skipping insertion in model container [2020-09-24 18:11:29,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:11:29,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:11:29,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:11:29,558 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:11:29,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:11:29,625 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:11:29,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29 WrapperNode [2020-09-24 18:11:29,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:11:29,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:11:29,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:11:29,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:11:29,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... [2020-09-24 18:11:29,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:11:29,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:11:29,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:11:29,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:11:29,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:11:29,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:11:29,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:11:29,855 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 18:11:29,855 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-09-24 18:11:29,855 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-09-24 18:11:29,855 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-09-24 18:11:29,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:11:29,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:11:29,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 18:11:29,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 18:11:29,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 18:11:29,856 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-09-24 18:11:29,856 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-09-24 18:11:29,856 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-09-24 18:11:29,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:11:29,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:11:29,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:11:30,407 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:11:30,407 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 18:11:30,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:11:30 BoogieIcfgContainer [2020-09-24 18:11:30,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:11:30,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:11:30,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:11:30,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:11:30,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:11:29" (1/3) ... [2020-09-24 18:11:30,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bd9ad53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:11:30, skipping insertion in model container [2020-09-24 18:11:30,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:11:29" (2/3) ... [2020-09-24 18:11:30,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bd9ad53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:11:30, skipping insertion in model container [2020-09-24 18:11:30,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:11:30" (3/3) ... [2020-09-24 18:11:30,425 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-09-24 18:11:30,435 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:11:30,446 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:11:30,466 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:11:30,496 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:11:30,496 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:11:30,496 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:11:30,497 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:11:30,497 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:11:30,497 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:11:30,497 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:11:30,497 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:11:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-09-24 18:11:30,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-24 18:11:30,535 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:11:30,536 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:11:30,537 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:11:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:11:30,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2062280112, now seen corresponding path program 1 times [2020-09-24 18:11:30,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:11:30,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625689857] [2020-09-24 18:11:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:11:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:30,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:30,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:31,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:31,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:32,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:32,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-24 18:11:32,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 18:11:32,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1774 [2020-09-24 18:11:32,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:32,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:11:32,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-09-24 18:11:32,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 18:11:32,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:11:32,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:11:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:32,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:32,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:32,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:11:32,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:32,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:11:32,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:32,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:32,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:32,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:32,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:32,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 18:11:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:32,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:32,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:32,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:32,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:32,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:11:32,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:32,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:32,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:32,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:32,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:32,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 18:11:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:32,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:32,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:32,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:32,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:32,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:11:32,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 18:11:32,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:32,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:32,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:32,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:32,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:32,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 18:11:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:32,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:32,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:32,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:32,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:32,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:11:32,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:32,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:32,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:32,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:32,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:32,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 18:11:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:32,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:32,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:32,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:32,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:32,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:11:32,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:32,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:32,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:32,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-09-24 18:11:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:32,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:32,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:32,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 18:11:32,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:32,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 18:11:32,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:32,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:11:32,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:32,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 18:11:32,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 18:11:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-09-24 18:11:32,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625689857] [2020-09-24 18:11:32,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:11:32,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 18:11:32,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922026509] [2020-09-24 18:11:32,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 18:11:32,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:11:32,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 18:11:32,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 18:11:32,790 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 3 states. [2020-09-24 18:11:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:11:32,856 INFO L93 Difference]: Finished difference Result 253 states and 309 transitions. [2020-09-24 18:11:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 18:11:32,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-09-24 18:11:32,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:11:32,875 INFO L225 Difference]: With dead ends: 253 [2020-09-24 18:11:32,875 INFO L226 Difference]: Without dead ends: 126 [2020-09-24 18:11:32,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 18:11:32,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-24 18:11:32,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-09-24 18:11:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-24 18:11:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 144 transitions. [2020-09-24 18:11:32,947 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 144 transitions. Word has length 100 [2020-09-24 18:11:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:11:32,950 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 144 transitions. [2020-09-24 18:11:32,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 18:11:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 144 transitions. [2020-09-24 18:11:32,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-09-24 18:11:32,956 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:11:32,956 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:11:32,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:11:32,957 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:11:32,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:11:32,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2043535721, now seen corresponding path program 1 times [2020-09-24 18:11:32,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:11:32,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656192232] [2020-09-24 18:11:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:11:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:32,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:33,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:33,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:33,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:35,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:35,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:36,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:36,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:36,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:37,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:37,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-24 18:11:37,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 18:11:37,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 18:11:37,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:37,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:11:37,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-09-24 18:11:37,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 18:11:37,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:38,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:11:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:38,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:38,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:38,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:11:38,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:38,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:11:38,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:38,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:38,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:38,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:38,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:38,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 18:11:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:38,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:38,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:38,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:38,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:38,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:11:38,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:38,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:38,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 18:11:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:38,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:38,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:38,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:38,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:38,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:11:38,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 18:11:38,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:38,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:38,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:38,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:38,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:38,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 18:11:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:38,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:38,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:38,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:38,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:38,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:11:38,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:38,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:38,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:38,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:38,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:38,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 18:11:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:38,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:38,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:38,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:38,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:38,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:11:38,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:38,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:38,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:38,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:38,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:38,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 18:11:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:38,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:38,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:38,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 18:11:38,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:38,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:11:38,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:38,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:11:38,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:38,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 18:11:38,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-09-24 18:11:38,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656192232] [2020-09-24 18:11:38,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:11:38,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:11:38,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181911657] [2020-09-24 18:11:38,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:11:38,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:11:38,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:11:38,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:11:38,147 INFO L87 Difference]: Start difference. First operand 126 states and 144 transitions. Second operand 4 states. [2020-09-24 18:11:38,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:11:38,214 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2020-09-24 18:11:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 18:11:38,215 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2020-09-24 18:11:38,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:11:38,221 INFO L225 Difference]: With dead ends: 142 [2020-09-24 18:11:38,221 INFO L226 Difference]: Without dead ends: 125 [2020-09-24 18:11:38,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:11:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-24 18:11:38,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-09-24 18:11:38,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-24 18:11:38,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 142 transitions. [2020-09-24 18:11:38,250 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 142 transitions. Word has length 102 [2020-09-24 18:11:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:11:38,255 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 142 transitions. [2020-09-24 18:11:38,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:11:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 142 transitions. [2020-09-24 18:11:38,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-09-24 18:11:38,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:11:38,265 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:11:38,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:11:38,265 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:11:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:11:38,268 INFO L82 PathProgramCache]: Analyzing trace with hash -728440265, now seen corresponding path program 1 times [2020-09-24 18:11:38,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:11:38,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223923361] [2020-09-24 18:11:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:11:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:38,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:38,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:38,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:38,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:38,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:43,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:43,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-24 18:11:43,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:11:43,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 18:11:43,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:43,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:11:43,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 18:11:43,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:11:43,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:43,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:11:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:43,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:43,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:43,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:11:43,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:43,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:11:43,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:43,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:43,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:43,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:43,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:43,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 18:11:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:43,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:43,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:43,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:43,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:43,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:11:43,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:43,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:43,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:43,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:43,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:43,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 18:11:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:43,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:43,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:43,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:43,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:43,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 18:11:43,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:43,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:11:43,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 18:11:43,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 18:11:43,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:43,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 18:11:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:43,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:43,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:43,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:43,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:43,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:11:43,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:43,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:43,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:11:43,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:43,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:43,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 18:11:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:43,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:43,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:43,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:43,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:43,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:11:43,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:43,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:43,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:11:43,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:43,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:43,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 18:11:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:43,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:43,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:43,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 18:11:43,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:43,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:11:43,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:43,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:43,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 18:11:43,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:43,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 18:11:43,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223923361] [2020-09-24 18:11:43,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:11:43,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 18:11:43,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099115753] [2020-09-24 18:11:43,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:11:43,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:11:43,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:11:43,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:11:43,423 INFO L87 Difference]: Start difference. First operand 125 states and 142 transitions. Second operand 4 states. [2020-09-24 18:11:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:11:43,561 INFO L93 Difference]: Finished difference Result 276 states and 324 transitions. [2020-09-24 18:11:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:11:43,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2020-09-24 18:11:43,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:11:43,567 INFO L225 Difference]: With dead ends: 276 [2020-09-24 18:11:43,567 INFO L226 Difference]: Without dead ends: 179 [2020-09-24 18:11:43,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:11:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-24 18:11:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 159. [2020-09-24 18:11:43,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-24 18:11:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 186 transitions. [2020-09-24 18:11:43,586 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 186 transitions. Word has length 102 [2020-09-24 18:11:43,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:11:43,587 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 186 transitions. [2020-09-24 18:11:43,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:11:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 186 transitions. [2020-09-24 18:11:43,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-24 18:11:43,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:11:43,590 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:11:43,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:11:43,590 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:11:43,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:11:43,591 INFO L82 PathProgramCache]: Analyzing trace with hash 174556480, now seen corresponding path program 1 times [2020-09-24 18:11:43,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:11:43,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421807758] [2020-09-24 18:11:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:11:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:43,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:43,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:43,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:43,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:43,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:48,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:48,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-09-24 18:11:48,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:11:48,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 18:11:48,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:48,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:11:48,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 18:11:48,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 18:11:48,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:48,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:11:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:48,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:48,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:48,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:11:48,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:48,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:11:48,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:48,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:48,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:48,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:48,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:48,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 18:11:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:48,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:48,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:48,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:48,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:48,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:11:48,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:48,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:48,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 18:11:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:48,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:48,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:48,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:11:48,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:48,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 18:11:48,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:48,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:11:48,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 18:11:48,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 18:11:48,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:48,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 18:11:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:48,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:48,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:48,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:48,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:48,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:11:48,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:48,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:11:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:48,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:48,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 18:11:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:48,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:48,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:48,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:48,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:48,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:11:48,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:48,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:48,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:11:48,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:48,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:48,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 18:11:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:48,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:48,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:48,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 18:11:48,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:48,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:11:48,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:48,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:48,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 18:11:48,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:48,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 18:11:48,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421807758] [2020-09-24 18:11:48,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:11:48,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 18:11:48,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841943206] [2020-09-24 18:11:48,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:11:48,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:11:48,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:11:48,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:11:48,740 INFO L87 Difference]: Start difference. First operand 159 states and 186 transitions. Second operand 4 states. [2020-09-24 18:11:48,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:11:48,844 INFO L93 Difference]: Finished difference Result 285 states and 334 transitions. [2020-09-24 18:11:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 18:11:48,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-09-24 18:11:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:11:48,847 INFO L225 Difference]: With dead ends: 285 [2020-09-24 18:11:48,847 INFO L226 Difference]: Without dead ends: 178 [2020-09-24 18:11:48,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:11:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-24 18:11:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2020-09-24 18:11:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-24 18:11:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 192 transitions. [2020-09-24 18:11:48,880 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 192 transitions. Word has length 105 [2020-09-24 18:11:48,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:11:48,880 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 192 transitions. [2020-09-24 18:11:48,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:11:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 192 transitions. [2020-09-24 18:11:48,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-24 18:11:48,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:11:48,884 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:11:48,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:11:48,885 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:11:48,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:11:48,885 INFO L82 PathProgramCache]: Analyzing trace with hash 411384115, now seen corresponding path program 1 times [2020-09-24 18:11:48,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:11:48,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957277583] [2020-09-24 18:11:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:11:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:48,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:48,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:48,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:49,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:49,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:49,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:49,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:53,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:53,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-09-24 18:11:53,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:11:53,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 18:11:53,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:53,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:11:53,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 18:11:53,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 18:11:53,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:53,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:11:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:53,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:53,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:53,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:11:53,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:53,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:11:53,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:53,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:53,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:53,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:53,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:53,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 18:11:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:53,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:53,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:53,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:53,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:53,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:11:53,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:53,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:53,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:53,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:53,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:53,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 18:11:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:53,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:53,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:53,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:53,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:53,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 18:11:53,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:11:53,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-24 18:11:54,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:54,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:11:54,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 18:11:54,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 18:11:54,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:54,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 18:11:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:54,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:54,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:54,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:54,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:54,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:11:54,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:54,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:54,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:11:54,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:54,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:54,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-24 18:11:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:54,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:54,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:54,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:54,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:54,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:11:54,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:54,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:54,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:11:54,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:54,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:54,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-09-24 18:11:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:54,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:54,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:54,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 18:11:54,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:54,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:11:54,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 18:11:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:54,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 18:11:54,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957277583] [2020-09-24 18:11:54,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:11:54,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 18:11:54,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663766972] [2020-09-24 18:11:54,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:11:54,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:11:54,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:11:54,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:11:54,090 INFO L87 Difference]: Start difference. First operand 164 states and 192 transitions. Second operand 4 states. [2020-09-24 18:11:54,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:11:54,213 INFO L93 Difference]: Finished difference Result 302 states and 354 transitions. [2020-09-24 18:11:54,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:11:54,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-09-24 18:11:54,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:11:54,216 INFO L225 Difference]: With dead ends: 302 [2020-09-24 18:11:54,216 INFO L226 Difference]: Without dead ends: 173 [2020-09-24 18:11:54,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:11:54,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-24 18:11:54,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2020-09-24 18:11:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-24 18:11:54,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2020-09-24 18:11:54,229 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 106 [2020-09-24 18:11:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:11:54,230 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2020-09-24 18:11:54,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:11:54,230 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2020-09-24 18:11:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-24 18:11:54,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:11:54,232 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:11:54,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:11:54,232 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:11:54,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:11:54,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1053175091, now seen corresponding path program 1 times [2020-09-24 18:11:54,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:11:54,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286156363] [2020-09-24 18:11:54,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:11:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:54,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:54,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:54,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:54,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:54,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:59,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:59,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-09-24 18:11:59,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:11:59,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 18:11:59,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:59,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:11:59,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 18:11:59,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:11:59,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:59,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:11:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:59,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:59,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:59,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:11:59,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:59,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:11:59,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:59,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:59,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:59,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:59,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:59,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 18:11:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:59,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:59,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:59,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:59,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:59,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:11:59,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:59,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:59,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:11:59,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:59,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:59,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 18:11:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:59,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:59,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:59,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 18:11:59,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:59,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:11:59,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:59,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:11:59,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 18:11:59,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 18:11:59,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:11:59,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-24 18:11:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:59,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:59,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:59,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:59,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:59,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:11:59,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:59,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:59,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:11:59,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:59,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:59,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-24 18:11:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:59,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:59,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:59,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:11:59,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:59,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:11:59,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:59,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:59,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:11:59,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:59,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:59,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 18:11:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:59,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:59,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:11:59,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 18:11:59,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:11:59,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:11:59,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:11:59,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:11:59,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 18:11:59,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:11:59,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:11:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 18:11:59,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286156363] [2020-09-24 18:11:59,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:11:59,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 18:11:59,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753310993] [2020-09-24 18:11:59,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:11:59,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:11:59,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:11:59,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:11:59,384 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand 4 states. [2020-09-24 18:11:59,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:11:59,503 INFO L93 Difference]: Finished difference Result 297 states and 346 transitions. [2020-09-24 18:11:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:11:59,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-09-24 18:11:59,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:11:59,505 INFO L225 Difference]: With dead ends: 297 [2020-09-24 18:11:59,505 INFO L226 Difference]: Without dead ends: 175 [2020-09-24 18:11:59,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:11:59,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-24 18:11:59,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 157. [2020-09-24 18:11:59,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-24 18:11:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2020-09-24 18:11:59,517 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 107 [2020-09-24 18:11:59,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:11:59,517 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2020-09-24 18:11:59,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:11:59,518 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2020-09-24 18:11:59,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-24 18:11:59,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:11:59,519 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:11:59,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:11:59,520 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:11:59,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:11:59,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1153920056, now seen corresponding path program 1 times [2020-09-24 18:11:59,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:11:59,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105776132] [2020-09-24 18:11:59,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:11:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:11:59,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:59,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:59,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:59,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:11:59,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:04,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:04,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-09-24 18:12:04,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:12:04,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-24 18:12:04,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:04,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:12:04,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 18:12:04,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 18:12:04,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:12:04,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:12:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:04,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:04,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:04,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:12:04,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:04,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:12:04,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:04,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:04,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:12:04,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:04,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:12:04,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 18:12:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:04,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:04,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:04,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:12:04,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:04,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:12:04,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:04,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:04,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:12:04,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:04,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:12:04,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 18:12:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:04,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:04,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:04,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 18:12:04,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:04,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-24 18:12:04,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:04,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:12:04,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 18:12:04,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 18:12:04,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:12:04,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 18:12:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:04,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:04,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:04,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:12:04,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:04,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:12:04,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:04,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:04,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:12:04,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:04,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:12:04,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 18:12:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:04,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:04,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:04,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:12:04,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:04,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:12:04,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:04,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:04,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:12:04,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:04,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:12:04,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 18:12:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:04,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:04,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:04,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 18:12:04,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:04,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:12:04,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 18:12:04,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:04,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:12:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 18:12:04,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105776132] [2020-09-24 18:12:04,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:12:04,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:12:04,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573575767] [2020-09-24 18:12:04,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:12:04,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:12:04,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:12:04,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:12:04,676 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand 5 states. [2020-09-24 18:12:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:12:04,818 INFO L93 Difference]: Finished difference Result 304 states and 355 transitions. [2020-09-24 18:12:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:12:04,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-09-24 18:12:04,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:12:04,824 INFO L225 Difference]: With dead ends: 304 [2020-09-24 18:12:04,824 INFO L226 Difference]: Without dead ends: 188 [2020-09-24 18:12:04,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:12:04,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-09-24 18:12:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 167. [2020-09-24 18:12:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-24 18:12:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 193 transitions. [2020-09-24 18:12:04,842 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 193 transitions. Word has length 110 [2020-09-24 18:12:04,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:12:04,843 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 193 transitions. [2020-09-24 18:12:04,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:12:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 193 transitions. [2020-09-24 18:12:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-24 18:12:04,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:12:04,845 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:12:04,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 18:12:04,846 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:12:04,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:12:04,846 INFO L82 PathProgramCache]: Analyzing trace with hash -856467222, now seen corresponding path program 1 times [2020-09-24 18:12:04,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:12:04,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256545517] [2020-09-24 18:12:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:12:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:04,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:04,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:05,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:05,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:05,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:09,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:09,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-09-24 18:12:09,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:12:09,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-24 18:12:09,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:09,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:12:09,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 18:12:09,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 18:12:09,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:12:09,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:12:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:09,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:09,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:09,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:12:09,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:09,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:12:09,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:09,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:09,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:12:09,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:09,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:12:09,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 18:12:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:09,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:09,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:09,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:12:09,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:09,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:12:09,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:09,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:09,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:12:09,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:09,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:12:09,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 18:12:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:09,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:09,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:09,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 18:12:09,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:09,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 18:12:09,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:09,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:12:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 18:12:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 18:12:09,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:12:09,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 18:12:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:09,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:09,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:09,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:12:09,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:09,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:12:09,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:09,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:09,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:12:09,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:09,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:12:09,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 18:12:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:09,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:09,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:09,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 18:12:10,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:10,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:12:10,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:10,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:10,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:12:10,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:10,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:12:10,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 18:12:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:10,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:10,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:10,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 18:12:10,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:10,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:12:10,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:10,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:10,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 18:12:10,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:10,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:12:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 18:12:10,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256545517] [2020-09-24 18:12:10,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:12:10,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:12:10,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732858043] [2020-09-24 18:12:10,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:12:10,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:12:10,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:12:10,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:12:10,034 INFO L87 Difference]: Start difference. First operand 167 states and 193 transitions. Second operand 5 states. [2020-09-24 18:12:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:12:10,211 INFO L93 Difference]: Finished difference Result 320 states and 375 transitions. [2020-09-24 18:12:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 18:12:10,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-09-24 18:12:10,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:12:10,214 INFO L225 Difference]: With dead ends: 320 [2020-09-24 18:12:10,214 INFO L226 Difference]: Without dead ends: 197 [2020-09-24 18:12:10,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:12:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-24 18:12:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 167. [2020-09-24 18:12:10,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-24 18:12:10,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 192 transitions. [2020-09-24 18:12:10,232 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 192 transitions. Word has length 110 [2020-09-24 18:12:10,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:12:10,233 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 192 transitions. [2020-09-24 18:12:10,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:12:10,233 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 192 transitions. [2020-09-24 18:12:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-24 18:12:10,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:12:10,235 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:12:10,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 18:12:10,236 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:12:10,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:12:10,236 INFO L82 PathProgramCache]: Analyzing trace with hash -812048320, now seen corresponding path program 2 times [2020-09-24 18:12:10,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:12:10,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253237415] [2020-09-24 18:12:10,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:12:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:10,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:10,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:10,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:10,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:10,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking...