/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 --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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/stateful_check.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:23:31,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:23:31,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:23:31,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:23:31,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:23:31,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:23:31,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:23:31,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:23:31,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:23:31,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:23:31,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:23:31,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:23:31,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:23:31,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:23:31,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:23:31,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:23:31,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:23:31,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:23:31,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:23:31,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:23:31,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:23:31,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:23:31,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:23:31,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:23:31,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:23:31,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:23:31,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:23:31,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:23:31,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:23:31,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:23:31,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:23:31,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:23:31,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:23:31,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:23:31,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:23:31,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:23:31,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:23:31,771 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:23:31,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:23:31,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:23:31,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:23:31,775 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 [2020-09-21 11:23:31,825 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:23:31,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:23:31,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:23:31,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:23:31,828 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:23:31,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:23:31,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:23:31,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:23:31,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:23:31,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:23:31,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:23:31,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:23:31,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:23:31,832 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:23:31,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:23:31,832 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:23:31,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:23:31,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:23:31,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:23:31,833 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:23:31,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:23:31,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:23:31,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:23:31,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:23:31,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:23:31,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:23:31,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:23:31,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:23:31,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:23:31,835 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:23:32,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:23:32,296 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:23:32,301 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:23:32,305 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:23:32,305 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:23:32,306 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-09-21 11:23:32,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9573f57cd/78450ae55cd64aa39bfda1b9920b407e/FLAG739ea7aea [2020-09-21 11:23:32,922 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:23:32,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-09-21 11:23:32,934 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9573f57cd/78450ae55cd64aa39bfda1b9920b407e/FLAG739ea7aea [2020-09-21 11:23:33,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9573f57cd/78450ae55cd64aa39bfda1b9920b407e [2020-09-21 11:23:33,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:23:33,271 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:23:33,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:33,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:23:33,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:23:33,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:33" (1/1) ... [2020-09-21 11:23:33,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef001ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:33, skipping insertion in model container [2020-09-21 11:23:33,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:33" (1/1) ... [2020-09-21 11:23:33,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:23:33,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:23:33,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:33,570 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:23:33,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:33,610 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:23:33,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:33 WrapperNode [2020-09-21 11:23:33,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:33,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:23:33,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:23:33,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:23:33,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:33" (1/1) ... [2020-09-21 11:23:33,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:33" (1/1) ... [2020-09-21 11:23:33,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:33" (1/1) ... [2020-09-21 11:23:33,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:33" (1/1) ... [2020-09-21 11:23:33,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:33" (1/1) ... [2020-09-21 11:23:33,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:33" (1/1) ... [2020-09-21 11:23:33,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:33" (1/1) ... [2020-09-21 11:23:33,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:23:33,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:23:33,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:23:33,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:23:33,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:33" (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 [2020-09-21 11:23:33,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:23:33,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:23:33,809 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-09-21 11:23:33,810 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-09-21 11:23:33,810 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-09-21 11:23:33,810 INFO L138 BoogieDeclarations]: Found implementation of procedure check_final_state [2020-09-21 11:23:33,810 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_release [2020-09-21 11:23:33,810 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_llseek [2020-09-21 11:23:33,811 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_read [2020-09-21 11:23:33,811 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_open [2020-09-21 11:23:33,811 INFO L138 BoogieDeclarations]: Found implementation of procedure my_init [2020-09-21 11:23:33,811 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:23:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:23:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-09-21 11:23:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:23:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-09-21 11:23:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-09-21 11:23:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure check_final_state [2020-09-21 11:23:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure misc_release [2020-09-21 11:23:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure misc_llseek [2020-09-21 11:23:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure misc_read [2020-09-21 11:23:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure misc_open [2020-09-21 11:23:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure my_init [2020-09-21 11:23:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:23:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:23:33,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:23:34,204 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:23:34,205 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:23:34,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:34 BoogieIcfgContainer [2020-09-21 11:23:34,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:23:34,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:23:34,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:23:34,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:23:34,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:23:33" (1/3) ... [2020-09-21 11:23:34,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629c8179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:34, skipping insertion in model container [2020-09-21 11:23:34,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:33" (2/3) ... [2020-09-21 11:23:34,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629c8179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:34, skipping insertion in model container [2020-09-21 11:23:34,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:34" (3/3) ... [2020-09-21 11:23:34,220 INFO L109 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2020-09-21 11:23:34,231 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:23:34,241 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:23:34,260 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:23:34,288 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:23:34,288 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:23:34,289 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:23:34,289 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:23:34,289 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:23:34,289 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:23:34,289 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:23:34,289 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:23:34,312 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-09-21 11:23:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 11:23:34,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:34,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:34,322 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:34,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:34,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1865767033, now seen corresponding path program 1 times [2020-09-21 11:23:34,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:34,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310854598] [2020-09-21 11:23:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:34,460 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:34,461 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:34,461 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:34,461 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:34,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:23:34,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:34,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:23:34,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 11:23:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:34,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:34,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:34,539 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:34,540 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:34,540 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:34,540 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:34,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:34,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:34,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:34,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:34,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:34,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:34,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:34,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:34,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:23:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:34,580 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:34,580 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:34,581 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:34,583 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:34,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:34,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:34,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:23:34,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:34,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:34,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310854598] [2020-09-21 11:23:34,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:34,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:23:34,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835118664] [2020-09-21 11:23:34,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:23:34,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:23:34,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:23:34,628 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 4 states. [2020-09-21 11:23:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:34,817 INFO L93 Difference]: Finished difference Result 140 states and 185 transitions. [2020-09-21 11:23:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:23:34,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-21 11:23:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:34,835 INFO L225 Difference]: With dead ends: 140 [2020-09-21 11:23:34,835 INFO L226 Difference]: Without dead ends: 70 [2020-09-21 11:23:34,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:23:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-21 11:23:34,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-09-21 11:23:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-21 11:23:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2020-09-21 11:23:34,900 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 16 [2020-09-21 11:23:34,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:34,900 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2020-09-21 11:23:34,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:23:34,901 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2020-09-21 11:23:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 11:23:34,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:34,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:34,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:23:34,902 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:34,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:34,903 INFO L82 PathProgramCache]: Analyzing trace with hash 6927045, now seen corresponding path program 1 times [2020-09-21 11:23:34,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:34,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101500112] [2020-09-21 11:23:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:34,943 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:34,943 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:34,944 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:34,944 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:34,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:23:34,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:34,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:23:34,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:23:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:23:34,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:35,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:35,010 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:35,010 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:35,010 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:35,010 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:35,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:35,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:35,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:23:35,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:35,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:35,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:35,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:23:35,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:35,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:23:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:35,036 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:35,036 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:35,036 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:35,037 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:35,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:35,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:35,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:35,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:35,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:35,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:35,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:23:35,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:35,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101500112] [2020-09-21 11:23:35,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:35,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:23:35,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774165315] [2020-09-21 11:23:35,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:23:35,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:35,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:23:35,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:23:35,050 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand 5 states. [2020-09-21 11:23:35,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:35,291 INFO L93 Difference]: Finished difference Result 112 states and 143 transitions. [2020-09-21 11:23:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:23:35,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-21 11:23:35,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:35,294 INFO L225 Difference]: With dead ends: 112 [2020-09-21 11:23:35,294 INFO L226 Difference]: Without dead ends: 106 [2020-09-21 11:23:35,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:23:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-21 11:23:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-09-21 11:23:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-21 11:23:35,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2020-09-21 11:23:35,318 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 17 [2020-09-21 11:23:35,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:35,318 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2020-09-21 11:23:35,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:23:35,319 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2020-09-21 11:23:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 11:23:35,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:35,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:35,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:23:35,321 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:35,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:35,321 INFO L82 PathProgramCache]: Analyzing trace with hash -695621135, now seen corresponding path program 1 times [2020-09-21 11:23:35,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:35,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470132460] [2020-09-21 11:23:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:35,358 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:35,361 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:35,361 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:35,361 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:35,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:23:35,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:35,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:23:35,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:35,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:35,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:35,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:23:35,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:35,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:35,401 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:35,401 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:35,402 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:35,402 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:35,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:35,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:35,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:35,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:35,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:35,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:35,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:35,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:35,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:23:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:35,417 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:35,418 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:35,418 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:35,418 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:35,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:35,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:35,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:35,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:35,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:35,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:35,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:23:35,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:35,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 11:23:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:35,434 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:35,434 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:35,434 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:35,434 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:35,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:23:35,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:35,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:35,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:35,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:35,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:23:35,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:35,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:35,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470132460] [2020-09-21 11:23:35,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:35,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:23:35,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091975552] [2020-09-21 11:23:35,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:23:35,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:35,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:23:35,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:23:35,444 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand 6 states. [2020-09-21 11:23:35,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:35,693 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2020-09-21 11:23:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:23:35,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-09-21 11:23:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:35,696 INFO L225 Difference]: With dead ends: 253 [2020-09-21 11:23:35,696 INFO L226 Difference]: Without dead ends: 162 [2020-09-21 11:23:35,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:23:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-21 11:23:35,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 126. [2020-09-21 11:23:35,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-21 11:23:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 169 transitions. [2020-09-21 11:23:35,720 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 169 transitions. Word has length 29 [2020-09-21 11:23:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:35,720 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 169 transitions. [2020-09-21 11:23:35,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:23:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 169 transitions. [2020-09-21 11:23:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 11:23:35,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:35,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:35,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:23:35,723 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:35,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:35,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1328709660, now seen corresponding path program 1 times [2020-09-21 11:23:35,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:35,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584070288] [2020-09-21 11:23:35,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:35,753 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:35,753 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:35,754 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:35,754 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:35,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-21 11:23:35,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:35,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:23:35,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:35,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:23:35,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:35,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-21 11:23:35,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:35,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:35,803 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:35,803 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:35,803 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:35,803 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:35,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:35,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:35,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:35,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:35,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:35,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:35,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:35,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:35,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:23:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:35,823 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:35,824 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:35,824 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:35,824 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:35,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:35,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:35,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:35,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:35,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:35,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:35,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:23:35,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:35,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 11:23:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:35,834 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:35,835 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:35,835 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:35,835 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:35,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:23:35,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:35,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:35,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:35,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:35,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:35,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:23:35,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:35,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 11:23:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:35,850 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:35,850 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:35,850 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:35,850 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:35,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:23:35,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:35,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:35,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:35,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:35,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:23:35,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:35,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:35,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584070288] [2020-09-21 11:23:35,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:35,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:23:35,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624158623] [2020-09-21 11:23:35,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:23:35,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:35,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:23:35,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:23:35,860 INFO L87 Difference]: Start difference. First operand 126 states and 169 transitions. Second operand 7 states. [2020-09-21 11:23:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:36,136 INFO L93 Difference]: Finished difference Result 350 states and 513 transitions. [2020-09-21 11:23:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:23:36,138 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-09-21 11:23:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:36,141 INFO L225 Difference]: With dead ends: 350 [2020-09-21 11:23:36,142 INFO L226 Difference]: Without dead ends: 235 [2020-09-21 11:23:36,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:23:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-21 11:23:36,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 150. [2020-09-21 11:23:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-21 11:23:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 208 transitions. [2020-09-21 11:23:36,165 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 208 transitions. Word has length 40 [2020-09-21 11:23:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:36,166 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 208 transitions. [2020-09-21 11:23:36,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:23:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 208 transitions. [2020-09-21 11:23:36,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 11:23:36,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:36,168 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-09-21 11:23:36,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:23:36,169 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:36,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1520942249, now seen corresponding path program 1 times [2020-09-21 11:23:36,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:36,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236865219] [2020-09-21 11:23:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:36,211 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:36,211 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:36,212 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:36,212 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:36,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 11:23:36,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:36,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:23:36,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:36,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:23:36,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:36,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-21 11:23:36,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:36,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:36,272 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:36,272 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:36,272 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:36,273 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:36,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:36,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:36,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:36,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:36,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:36,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:36,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:36,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:36,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:23:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:36,292 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:36,293 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:36,293 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:36,294 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:36,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:36,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:36,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:23:36,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:36,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:36,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:36,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:23:36,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:36,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 11:23:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:36,312 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:36,313 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:36,313 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:36,313 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:36,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:23:36,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:36,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:23:36,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:36,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:23:36,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:36,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 11:23:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:36,326 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:36,326 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:36,326 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:36,327 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:36,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:36,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:36,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:36,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:36,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:36,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:36,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:23:36,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:36,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 11:23:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:36,341 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:36,341 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:36,341 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:36,341 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:36,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:23:36,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:36,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:36,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:36,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:36,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:23:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:36,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:36,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236865219] [2020-09-21 11:23:36,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:36,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:23:36,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123787598] [2020-09-21 11:23:36,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:23:36,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:36,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:23:36,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:23:36,358 INFO L87 Difference]: Start difference. First operand 150 states and 208 transitions. Second operand 8 states. [2020-09-21 11:23:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:36,693 INFO L93 Difference]: Finished difference Result 447 states and 675 transitions. [2020-09-21 11:23:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:23:36,693 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-09-21 11:23:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:36,696 INFO L225 Difference]: With dead ends: 447 [2020-09-21 11:23:36,696 INFO L226 Difference]: Without dead ends: 308 [2020-09-21 11:23:36,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:23:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-09-21 11:23:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 174. [2020-09-21 11:23:36,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-21 11:23:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 249 transitions. [2020-09-21 11:23:36,716 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 249 transitions. Word has length 51 [2020-09-21 11:23:36,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:36,717 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 249 transitions. [2020-09-21 11:23:36,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:23:36,717 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 249 transitions. [2020-09-21 11:23:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-21 11:23:36,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:36,720 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 11:23:36,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:23:36,720 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:36,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:36,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1574199465, now seen corresponding path program 1 times [2020-09-21 11:23:36,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:36,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413377194] [2020-09-21 11:23:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:36,753 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:36,753 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:36,753 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:36,754 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:36,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-21 11:23:36,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:36,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:23:36,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:36,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:23:36,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-09-21 11:23:36,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:23:36,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:36,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:36,814 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:36,814 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:36,814 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:36,814 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:36,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:36,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:36,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:36,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:36,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:36,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:36,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:23:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:36,825 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:36,825 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:36,825 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:36,825 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:36,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:36,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:36,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:36,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:36,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:36,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:36,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:36,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:36,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 11:23:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:36,831 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:36,832 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:36,832 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:36,832 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:36,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:23:36,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:36,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:36,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:36,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:36,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:36,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:36,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:36,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 11:23:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:36,838 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:36,838 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:36,838 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:36,838 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:36,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:36,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:36,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:36,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:36,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:36,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:36,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:36,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:36,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 11:23:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:36,845 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:36,846 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:36,846 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:36,846 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:36,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:36,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:36,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:36,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:36,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:36,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:36,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:36,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:36,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-21 11:23:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:36,865 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:36,865 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:36,865 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:36,865 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:36,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:23:36,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:36,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:36,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:36,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:36,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:36,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 11:23:36,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-21 11:23:36,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413377194] [2020-09-21 11:23:36,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:36,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:23:36,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658972440] [2020-09-21 11:23:36,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:23:36,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:36,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:23:36,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:23:36,880 INFO L87 Difference]: Start difference. First operand 174 states and 249 transitions. Second operand 6 states. [2020-09-21 11:23:37,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:37,033 INFO L93 Difference]: Finished difference Result 318 states and 465 transitions. [2020-09-21 11:23:37,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:23:37,034 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-09-21 11:23:37,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:37,037 INFO L225 Difference]: With dead ends: 318 [2020-09-21 11:23:37,037 INFO L226 Difference]: Without dead ends: 155 [2020-09-21 11:23:37,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:23:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-21 11:23:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 98. [2020-09-21 11:23:37,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-21 11:23:37,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions. [2020-09-21 11:23:37,053 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 63 [2020-09-21 11:23:37,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:37,054 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions. [2020-09-21 11:23:37,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:23:37,054 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions. [2020-09-21 11:23:37,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-21 11:23:37,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:37,056 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 11:23:37,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:23:37,056 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:37,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:37,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1192820603, now seen corresponding path program 1 times [2020-09-21 11:23:37,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:37,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212397555] [2020-09-21 11:23:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:23:37,083 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:23:37,083 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:23:37,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:23:37,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:23:37 BoogieIcfgContainer [2020-09-21 11:23:37,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:23:37,115 INFO L168 Benchmark]: Toolchain (without parser) took 3847.18 ms. Allocated memory was 140.5 MB in the beginning and 245.4 MB in the end (delta: 104.9 MB). Free memory was 103.4 MB in the beginning and 207.2 MB in the end (delta: -103.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:37,116 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 11:23:37,117 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.26 ms. Allocated memory is still 140.5 MB. Free memory was 102.7 MB in the beginning and 92.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:37,118 INFO L168 Benchmark]: Boogie Preprocessor took 126.48 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 181.5 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:37,119 INFO L168 Benchmark]: RCFGBuilder took 472.48 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 161.1 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:37,120 INFO L168 Benchmark]: TraceAbstraction took 2899.58 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 160.5 MB in the beginning and 207.2 MB in the end (delta: -46.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:23:37,123 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 339.26 ms. Allocated memory is still 140.5 MB. Free memory was 102.7 MB in the beginning and 92.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.48 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 181.5 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 472.48 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 161.1 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2899.58 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 160.5 MB in the beginning and 207.2 MB in the end (delta: -46.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] int ldv_mutex = 1; [L11] int open_called = 0; [L74] int ldv_s_misc_fops_file_operations = 0; [L75] CALL my_init() [L69] open_called = 0 [L70] return 0; [L75] RET my_init() [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L81] COND TRUE ldv_s_misc_fops_file_operations==0 [L82] CALL misc_open() [L57] COND TRUE __VERIFIER_nondet_int() [L59] return 1; [L82] RET misc_open() [L83] ldv_s_misc_fops_file_operations++ [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L89] COND TRUE ldv_s_misc_fops_file_operations==1 [L90] CALL misc_read() [L52] return 0; [L90] RET misc_read() [L91] ldv_s_misc_fops_file_operations++ [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: [L97] COND TRUE ldv_s_misc_fops_file_operations==2 [L98] CALL misc_llseek() [L48] return 0; [L98] RET misc_llseek() [L99] ldv_s_misc_fops_file_operations++ [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: [L104] case 3: [L105] COND TRUE ldv_s_misc_fops_file_operations==3 [L106] CALL misc_release() [L34] COND FALSE !(\read(open_called)) [L41] CALL mutex_lock() [L16] (ldv_mutex == 1) ? 0 : __blast_assert() [L17] ldv_mutex = 2 [L41] RET mutex_lock() [L42] CALL mutex_lock() [L16] (ldv_mutex == 1) ? 0 : __blast_assert() [L16] CALL __blast_assert() [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 74 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.8s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 408 SDtfs, 599 SDslu, 753 SDs, 0 SdLazy, 707 SolverSat, 229 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 321 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 279 NumberOfCodeBlocks, 279 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 210 ConstructedInterpolants, 0 QuantifiedInterpolants, 16438 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 25/39 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...