/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/sina5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:15:41,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:15:41,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:15:41,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:15:41,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:15:41,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:15:41,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:15:41,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:15:41,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:15:41,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:15:41,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:15:41,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:15:41,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:15:41,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:15:41,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:15:41,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:15:41,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:15:41,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:15:41,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:15:41,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:15:41,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:15:41,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:15:41,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:15:41,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:15:41,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:15:41,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:15:41,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:15:41,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:15:41,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:15:41,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:15:41,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:15:41,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:15:41,835 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:15:41,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:15:41,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:15:41,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:15:41,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:15:41,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:15:41,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:15:41,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:15:41,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:15:41,845 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 10:15:41,892 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:15:41,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:15:41,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:15:41,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:15:41,896 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:15:41,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:15:41,899 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:15:41,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:15:41,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:15:41,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:15:41,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:15:41,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:15:41,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:15:41,900 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:15:41,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:15:41,901 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:15:41,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:15:41,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:15:41,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:15:41,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:15:41,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:15:41,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:15:41,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:15:41,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:15:41,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:15:41,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:15:41,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:15:41,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:15:41,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:15:41,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:15:42,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:15:42,264 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:15:42,269 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:15:42,271 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:15:42,272 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:15:42,274 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sina5.c [2020-10-12 10:15:42,337 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c75c4ba83/06f91af247b7472383a44f8702bb7734/FLAG0b33121da [2020-10-12 10:15:42,827 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:15:42,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/sina5.c [2020-10-12 10:15:42,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c75c4ba83/06f91af247b7472383a44f8702bb7734/FLAG0b33121da [2020-10-12 10:15:43,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c75c4ba83/06f91af247b7472383a44f8702bb7734 [2020-10-12 10:15:43,155 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:15:43,157 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:15:43,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:15:43,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:15:43,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:15:43,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:15:43" (1/1) ... [2020-10-12 10:15:43,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f798212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:43, skipping insertion in model container [2020-10-12 10:15:43,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:15:43" (1/1) ... [2020-10-12 10:15:43,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:15:43,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:15:43,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:15:43,385 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:15:43,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:15:43,433 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:15:43,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:43 WrapperNode [2020-10-12 10:15:43,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:15:43,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:15:43,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:15:43,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:15:43,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:43" (1/1) ... [2020-10-12 10:15:43,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:43" (1/1) ... [2020-10-12 10:15:43,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:43" (1/1) ... [2020-10-12 10:15:43,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:43" (1/1) ... [2020-10-12 10:15:43,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:43" (1/1) ... [2020-10-12 10:15:43,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:43" (1/1) ... [2020-10-12 10:15:43,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:43" (1/1) ... [2020-10-12 10:15:43,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:15:43,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:15:43,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:15:43,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:15:43,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:15:43,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:15:43,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:15:43,643 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:15:43,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:15:43,643 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:15:43,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:15:43,644 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:15:43,644 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:15:43,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:15:43,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:15:43,644 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 10:15:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:15:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:15:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 10:15:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:15:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:15:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:15:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:15:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:15:43,941 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:15:43,941 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-12 10:15:43,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:15:43 BoogieIcfgContainer [2020-10-12 10:15:43,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:15:43,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:15:43,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:15:43,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:15:43,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:15:43" (1/3) ... [2020-10-12 10:15:43,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72baeb0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:15:43, skipping insertion in model container [2020-10-12 10:15:43,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:43" (2/3) ... [2020-10-12 10:15:43,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72baeb0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:15:43, skipping insertion in model container [2020-10-12 10:15:43,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:15:43" (3/3) ... [2020-10-12 10:15:43,956 INFO L109 eAbstractionObserver]: Analyzing ICFG sina5.c [2020-10-12 10:15:43,974 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:15:43,982 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:15:43,999 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:15:44,030 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:15:44,031 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:15:44,031 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:15:44,031 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:15:44,031 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:15:44,031 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:15:44,032 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:15:44,032 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:15:44,056 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-12 10:15:44,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 10:15:44,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:44,066 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] [2020-10-12 10:15:44,067 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:44,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:44,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1994596369, now seen corresponding path program 1 times [2020-10-12 10:15:44,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:44,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335308802] [2020-10-12 10:15:44,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:44,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:45,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:45,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 10:15:45,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:15:45,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1168 [2020-10-12 10:15:45,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:45,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:15:45,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:15:45,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:15:45,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:15:45,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:45,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:45,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:45,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:45,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:45,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:15:45,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:45,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:45,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:45,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:45,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:45,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:45,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:45,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:45,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:45,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:45,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:15:45,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:15:45,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:45,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:45,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:45,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:45,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:45,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335308802] [2020-10-12 10:15:45,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:15:45,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 10:15:45,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991216762] [2020-10-12 10:15:45,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:15:45,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:45,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:15:45,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:15:45,538 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 6 states. [2020-10-12 10:15:45,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:45,861 INFO L93 Difference]: Finished difference Result 107 states and 157 transitions. [2020-10-12 10:15:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:15:45,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-12 10:15:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:45,876 INFO L225 Difference]: With dead ends: 107 [2020-10-12 10:15:45,876 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 10:15:45,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:15:45,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 10:15:45,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-10-12 10:15:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 10:15:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-12 10:15:45,938 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 28 [2020-10-12 10:15:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:45,938 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-12 10:15:45,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:15:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-12 10:15:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 10:15:45,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:45,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:45,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:15:45,942 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:45,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:45,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1357692925, now seen corresponding path program 1 times [2020-10-12 10:15:45,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:45,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157300925] [2020-10-12 10:15:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:46,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:46,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:46,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:46,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:47,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:47,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:47,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:47,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:47,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:48,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:48,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:50,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:50,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:50,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:50,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:51,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:51,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 10:15:51,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 10:15:51,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-12 10:15:51,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:15:51,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:51,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:15:51,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:15:52,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:52,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:52,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:52,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:52,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:52,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:15:52,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:52,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:52,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:52,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:52,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:52,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:52,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:52,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:52,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:52,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:52,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:15:52,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:52,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:52,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:52,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:52,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:52,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157300925] [2020-10-12 10:15:52,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:52,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:15:52,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817216007] [2020-10-12 10:15:52,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:15:52,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:52,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:15:52,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:15:52,756 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 22 states. [2020-10-12 10:15:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:54,904 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-10-12 10:15:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:15:54,905 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2020-10-12 10:15:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:54,907 INFO L225 Difference]: With dead ends: 80 [2020-10-12 10:15:54,909 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 10:15:54,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:15:54,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 10:15:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2020-10-12 10:15:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 10:15:54,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-12 10:15:54,940 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 38 [2020-10-12 10:15:54,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:54,940 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-12 10:15:54,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:15:54,941 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-12 10:15:54,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 10:15:54,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:54,947 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] [2020-10-12 10:15:54,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:15:54,947 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:54,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1439319237, now seen corresponding path program 2 times [2020-10-12 10:15:54,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:54,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352367653] [2020-10-12 10:15:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:54,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:55,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:55,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:55,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:59,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:59,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 10:15:59,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:15:59,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:15:59,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:59,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:15:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 10:15:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:15:59,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:00,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:00,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:00,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:00,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:00,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:00,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:00,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:00,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:00,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:00,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:00,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:00,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:00,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:00,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:00,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:00,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:00,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:00,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:00,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:00,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:00,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:00,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 10:16:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:16:00,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352367653] [2020-10-12 10:16:00,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:00,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:16:00,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356870195] [2020-10-12 10:16:00,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:16:00,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:00,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:16:00,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:16:00,069 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 8 states. [2020-10-12 10:16:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:00,543 INFO L93 Difference]: Finished difference Result 128 states and 150 transitions. [2020-10-12 10:16:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:16:00,545 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-10-12 10:16:00,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:00,550 INFO L225 Difference]: With dead ends: 128 [2020-10-12 10:16:00,551 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 10:16:00,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:16:00,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 10:16:00,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-10-12 10:16:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 10:16:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-10-12 10:16:00,584 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 40 [2020-10-12 10:16:00,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:00,585 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-10-12 10:16:00,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:16:00,585 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-10-12 10:16:00,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 10:16:00,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:00,588 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] [2020-10-12 10:16:00,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:16:00,588 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:00,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:00,588 INFO L82 PathProgramCache]: Analyzing trace with hash -987768069, now seen corresponding path program 3 times [2020-10-12 10:16:00,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:00,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532644169] [2020-10-12 10:16:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:00,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:00,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:00,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:00,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:02,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:03,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:03,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:04,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:05,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:05,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:05,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:05,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 10:16:05,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:16:05,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-12 10:16:05,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:05,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:16:05,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:05,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:16:05,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:07,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 10:16:07,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:07,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:07,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:07,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:07,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:07,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:07,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:07,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:07,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:07,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532644169] [2020-10-12 10:16:07,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:07,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:16:07,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521228108] [2020-10-12 10:16:07,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:16:07,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:07,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:16:07,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:16:07,296 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 23 states. [2020-10-12 10:16:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:09,274 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2020-10-12 10:16:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:16:09,275 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2020-10-12 10:16:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:09,278 INFO L225 Difference]: With dead ends: 125 [2020-10-12 10:16:09,279 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 10:16:09,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:16:09,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 10:16:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2020-10-12 10:16:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 10:16:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2020-10-12 10:16:09,295 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 40 [2020-10-12 10:16:09,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:09,295 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2020-10-12 10:16:09,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:16:09,295 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2020-10-12 10:16:09,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 10:16:09,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:09,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:09,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:16:09,297 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:09,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:09,298 INFO L82 PathProgramCache]: Analyzing trace with hash -266928455, now seen corresponding path program 4 times [2020-10-12 10:16:09,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:09,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926975916] [2020-10-12 10:16:09,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:09,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:14,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:16:14,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:16:14,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:16:14,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:14,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:16:14,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 10:16:14,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:16:14,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:14,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:14,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:14,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:14,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:14,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:14,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:14,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:14,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:14,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:14,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:14,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:14,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:14,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:14,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:14,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:14,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:14,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:14,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:14,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:14,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:16:14,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926975916] [2020-10-12 10:16:14,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:14,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:16:14,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662136849] [2020-10-12 10:16:14,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:16:14,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:14,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:16:14,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:16:14,380 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 8 states. [2020-10-12 10:16:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:14,674 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2020-10-12 10:16:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:16:14,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-10-12 10:16:14,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:14,676 INFO L225 Difference]: With dead ends: 120 [2020-10-12 10:16:14,677 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 10:16:14,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:16:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 10:16:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2020-10-12 10:16:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 10:16:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-12 10:16:14,686 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 42 [2020-10-12 10:16:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:14,687 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-12 10:16:14,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:16:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-12 10:16:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 10:16:14,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:14,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:14,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:16:14,689 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash 604298867, now seen corresponding path program 5 times [2020-10-12 10:16:14,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:14,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363103547] [2020-10-12 10:16:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:14,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:15,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:16,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:16,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:17,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:18,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:18,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:19,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:19,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:19,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 10:16:19,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:16:19,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:16:19,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:19,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:16:19,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:19,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:16:19,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:20,970 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-12 10:16:21,339 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-12 10:16:21,657 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-10-12 10:16:22,199 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-12 10:16:22,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:22,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:22,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:22,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:22,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:22,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:22,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:22,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:22,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:22,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:22,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:22,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:22,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:22,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:22,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:22,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:22,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:22,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:22,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:22,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:22,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:22,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:22,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363103547] [2020-10-12 10:16:22,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:22,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:16:22,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265353825] [2020-10-12 10:16:22,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:16:22,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:22,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:16:22,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:16:22,830 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 31 states. [2020-10-12 10:16:23,314 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-12 10:16:23,490 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-12 10:16:23,723 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-12 10:16:24,004 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-10-12 10:16:24,277 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-12 10:16:24,579 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-12 10:16:24,821 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-12 10:16:25,084 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-12 10:16:25,314 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-12 10:16:25,557 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-12 10:16:25,842 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-12 10:16:26,129 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2020-10-12 10:16:26,352 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-12 10:16:26,571 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-12 10:16:26,817 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-12 10:16:27,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:27,911 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2020-10-12 10:16:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:16:27,913 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 48 [2020-10-12 10:16:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:27,915 INFO L225 Difference]: With dead ends: 96 [2020-10-12 10:16:27,915 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 10:16:27,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=257, Invalid=2605, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 10:16:27,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 10:16:27,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2020-10-12 10:16:27,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 10:16:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2020-10-12 10:16:27,931 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 48 [2020-10-12 10:16:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:27,932 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2020-10-12 10:16:27,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:16:27,932 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2020-10-12 10:16:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 10:16:27,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:27,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:27,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:16:27,934 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:27,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:27,935 INFO L82 PathProgramCache]: Analyzing trace with hash 701039665, now seen corresponding path program 6 times [2020-10-12 10:16:27,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:27,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965412479] [2020-10-12 10:16:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:27,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:27,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:27,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:28,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:32,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:32,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 10:16:32,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:16:32,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:16:32,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:32,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:16:32,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 10:16:32,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:16:32,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:33,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:33,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:33,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:33,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:33,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:33,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:33,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:33,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:33,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:33,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:33,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:33,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:33,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:33,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:33,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:33,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:33,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:33,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:33,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:33,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:33,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:33,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 10:16:33,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965412479] [2020-10-12 10:16:33,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:33,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:16:33,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336868171] [2020-10-12 10:16:33,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:16:33,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:33,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:16:33,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:16:33,055 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 10 states. [2020-10-12 10:16:33,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:33,517 INFO L93 Difference]: Finished difference Result 197 states and 225 transitions. [2020-10-12 10:16:33,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 10:16:33,518 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-12 10:16:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:33,519 INFO L225 Difference]: With dead ends: 197 [2020-10-12 10:16:33,519 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 10:16:33,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:16:33,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 10:16:33,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 123. [2020-10-12 10:16:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-12 10:16:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2020-10-12 10:16:33,560 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 50 [2020-10-12 10:16:33,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:33,561 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2020-10-12 10:16:33,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:16:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2020-10-12 10:16:33,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 10:16:33,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:33,562 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:33,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:16:33,563 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:33,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:33,565 INFO L82 PathProgramCache]: Analyzing trace with hash -236563215, now seen corresponding path program 7 times [2020-10-12 10:16:33,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:33,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040464123] [2020-10-12 10:16:33,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:33,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:33,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:33,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:34,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:38,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:38,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 10:16:38,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:16:38,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:16:38,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:38,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:16:38,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:38,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:16:38,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:38,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:38,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:38,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:38,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:38,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:38,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:38,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:38,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:38,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:38,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:38,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:38,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:38,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:38,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:38,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:38,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:38,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:38,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:38,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:38,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:38,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:38,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 10:16:38,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040464123] [2020-10-12 10:16:38,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:38,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:16:38,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304099880] [2020-10-12 10:16:38,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:16:38,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:38,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:16:38,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:16:38,678 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand 10 states. [2020-10-12 10:16:39,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:39,349 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-10-12 10:16:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:16:39,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-12 10:16:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:39,353 INFO L225 Difference]: With dead ends: 144 [2020-10-12 10:16:39,353 INFO L226 Difference]: Without dead ends: 111 [2020-10-12 10:16:39,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:16:39,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-12 10:16:39,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2020-10-12 10:16:39,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-12 10:16:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-10-12 10:16:39,368 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 50 [2020-10-12 10:16:39,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:39,368 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-10-12 10:16:39,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:16:39,368 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-10-12 10:16:39,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 10:16:39,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:39,370 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:39,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:16:39,370 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:39,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:39,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1394873015, now seen corresponding path program 1 times [2020-10-12 10:16:39,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:39,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324873491] [2020-10-12 10:16:39,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:39,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:39,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:39,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:40,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:40,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:40,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:41,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:43,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:44,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:44,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 10:16:44,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:16:44,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 10:16:44,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:44,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:16:44,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:16:44,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 10:16:44,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:46,307 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 29 [2020-10-12 10:16:46,648 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 31 [2020-10-12 10:16:47,004 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 32 [2020-10-12 10:16:47,213 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 30 [2020-10-12 10:16:47,459 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 30 [2020-10-12 10:16:47,969 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 36 [2020-10-12 10:16:50,427 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 293 DAG size of output: 121 [2020-10-12 10:16:54,130 WARN L193 SmtUtils]: Spent 3.58 s on a formula simplification. DAG size of input: 309 DAG size of output: 117 [2020-10-12 10:16:56,359 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 334 DAG size of output: 113 [2020-10-12 10:16:58,926 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 364 DAG size of output: 141 [2020-10-12 10:17:00,879 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 320 DAG size of output: 122 [2020-10-12 10:17:02,867 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 269 DAG size of output: 106 [2020-10-12 10:17:04,235 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 203 DAG size of output: 50 [2020-10-12 10:17:05,795 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 232 DAG size of output: 70 [2020-10-12 10:17:06,573 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 34 [2020-10-12 10:17:07,078 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 32 [2020-10-12 10:17:07,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:07,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:07,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:07,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:07,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:07,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:07,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:07,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:07,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:07,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:07,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:07,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:17:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:07,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:07,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:07,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:07,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:07,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:07,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:07,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:07,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:07,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:07,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:07,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 10:17:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:07,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:07,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:07,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:07,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:07,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:17:07,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:07,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:17:07,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:07,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:17:07,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:17:08,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324873491] [2020-10-12 10:17:08,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:08,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:17:08,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992977541] [2020-10-12 10:17:08,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:17:08,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:08,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:17:08,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:17:08,044 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 35 states. [2020-10-12 10:17:08,368 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 3 [2020-10-12 10:17:08,733 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 15 [2020-10-12 10:17:10,486 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 46 [2020-10-12 10:17:12,212 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 199 DAG size of output: 146 [2020-10-12 10:17:13,792 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 151 DAG size of output: 130 [2020-10-12 10:17:15,970 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 281 DAG size of output: 149 [2020-10-12 10:17:17,581 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 196 DAG size of output: 157 [2020-10-12 10:17:18,600 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 125 [2020-10-12 10:17:19,446 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 137 [2020-10-12 10:17:22,534 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 248 DAG size of output: 215 [2020-10-12 10:17:23,726 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2020-10-12 10:17:24,817 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 117 [2020-10-12 10:17:25,268 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 74 [2020-10-12 10:17:25,496 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-12 10:17:28,902 WARN L193 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 231 DAG size of output: 210 [2020-10-12 10:17:29,716 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 110 [2020-10-12 10:17:30,698 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 108 [2020-10-12 10:17:31,144 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-12 10:17:31,640 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-12 10:17:31,819 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-12 10:17:33,372 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 232 DAG size of output: 102 [2020-10-12 10:17:35,201 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 244 DAG size of output: 109 [2020-10-12 10:17:35,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:35,903 INFO L93 Difference]: Finished difference Result 111 states and 118 transitions. [2020-10-12 10:17:35,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 10:17:35,903 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 56 [2020-10-12 10:17:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:35,904 INFO L225 Difference]: With dead ends: 111 [2020-10-12 10:17:35,904 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 10:17:35,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=590, Invalid=6216, Unknown=0, NotChecked=0, Total=6806 [2020-10-12 10:17:35,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 10:17:35,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2020-10-12 10:17:35,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 10:17:35,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-12 10:17:35,921 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 56 [2020-10-12 10:17:35,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:35,922 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-12 10:17:35,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:17:35,922 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-12 10:17:35,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:17:35,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:35,924 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:35,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:17:35,925 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:35,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:35,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2023972503, now seen corresponding path program 8 times [2020-10-12 10:17:35,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:35,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241927738] [2020-10-12 10:17:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:35,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:36,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:37,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:38,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:39,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:40,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:40,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:40,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 10:17:40,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:17:40,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:17:40,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:40,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 10:17:40,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:17:40,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 10:17:40,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:41,793 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-12 10:17:41,968 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-12 10:17:42,155 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-12 10:17:42,352 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-12 10:17:42,592 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-12 10:17:42,812 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-12 10:17:43,033 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-12 10:17:43,232 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-12 10:17:43,461 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-12 10:17:43,783 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2020-10-12 10:17:44,037 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-10-12 10:17:44,405 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2020-10-12 10:17:44,709 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-12 10:17:45,035 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2020-10-12 10:17:45,320 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-12 10:17:45,650 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-10-12 10:17:45,980 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2020-10-12 10:17:46,285 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-12 10:17:46,656 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 71 [2020-10-12 10:17:46,941 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2020-10-12 10:17:47,209 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-10-12 10:17:47,485 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-12 10:17:47,845 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 51 [2020-10-12 10:17:48,156 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2020-10-12 10:17:48,418 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-12 10:17:49,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:49,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:49,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:49,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:49,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:49,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:49,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:49,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:49,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:49,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:49,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:49,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:17:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:49,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:49,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:49,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:49,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:49,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:49,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:49,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:49,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:49,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:49,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:17:49,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241927738] [2020-10-12 10:17:49,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:49,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 10:17:49,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516138500] [2020-10-12 10:17:49,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 10:17:49,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:49,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 10:17:49,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1505, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:17:49,420 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 41 states. [2020-10-12 10:17:50,637 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 40 [2020-10-12 10:17:50,919 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 38 [2020-10-12 10:17:51,347 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-12 10:17:51,710 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2020-10-12 10:17:51,979 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-12 10:17:52,332 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 52 [2020-10-12 10:17:52,717 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-12 10:17:53,055 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-10-12 10:17:53,347 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-12 10:17:53,592 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-12 10:17:54,178 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 73 [2020-10-12 10:17:54,464 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-12 10:17:55,027 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 71 [2020-10-12 10:17:55,828 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 67 [2020-10-12 10:17:56,030 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-12 10:17:57,031 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 77 [2020-10-12 10:17:57,636 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 76 [2020-10-12 10:17:57,889 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-12 10:17:58,360 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 86 [2020-10-12 10:17:58,679 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-12 10:17:59,003 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-10-12 10:17:59,273 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 31 [2020-10-12 10:17:59,878 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 82 [2020-10-12 10:18:00,503 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 83 [2020-10-12 10:18:01,298 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 93 [2020-10-12 10:18:02,060 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 80 [2020-10-12 10:18:02,674 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 77 [2020-10-12 10:18:03,165 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 81 [2020-10-12 10:18:03,544 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 61 [2020-10-12 10:18:04,030 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-12 10:18:04,330 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-12 10:18:04,778 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-12 10:18:06,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:06,199 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2020-10-12 10:18:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 10:18:06,201 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 58 [2020-10-12 10:18:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:06,203 INFO L225 Difference]: With dead ends: 108 [2020-10-12 10:18:06,203 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 10:18:06,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=714, Invalid=6768, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 10:18:06,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 10:18:06,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2020-10-12 10:18:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-12 10:18:06,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-10-12 10:18:06,216 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 58 [2020-10-12 10:18:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:06,216 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-10-12 10:18:06,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 10:18:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-10-12 10:18:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 10:18:06,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:06,218 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:06,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:18:06,218 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:06,219 INFO L82 PathProgramCache]: Analyzing trace with hash -909586009, now seen corresponding path program 9 times [2020-10-12 10:18:06,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:06,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980750118] [2020-10-12 10:18:06,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:06,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:06,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:06,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:06,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:11,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:11,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 10:18:11,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:18:11,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:18:11,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:11,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:18:11,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 10:18:11,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:18:11,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:11,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:11,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:11,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:11,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:11,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:11,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:11,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:11,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:11,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:11,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:11,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:11,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:18:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:11,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:11,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:11,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:11,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:11,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:11,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:11,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:11,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:11,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:11,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-12 10:18:11,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980750118] [2020-10-12 10:18:11,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:11,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:18:11,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602998299] [2020-10-12 10:18:11,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:18:11,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:11,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:18:11,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:18:11,360 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 12 states. [2020-10-12 10:18:12,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:12,202 INFO L93 Difference]: Finished difference Result 215 states and 242 transitions. [2020-10-12 10:18:12,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:18:12,204 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-10-12 10:18:12,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:12,206 INFO L225 Difference]: With dead ends: 215 [2020-10-12 10:18:12,207 INFO L226 Difference]: Without dead ends: 166 [2020-10-12 10:18:12,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:18:12,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-12 10:18:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 143. [2020-10-12 10:18:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-12 10:18:12,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 155 transitions. [2020-10-12 10:18:12,235 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 155 transitions. Word has length 60 [2020-10-12 10:18:12,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:12,235 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 155 transitions. [2020-10-12 10:18:12,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:18:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 155 transitions. [2020-10-12 10:18:12,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 10:18:12,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:12,238 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:12,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:18:12,238 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:12,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:12,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1364278181, now seen corresponding path program 10 times [2020-10-12 10:18:12,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:12,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424456569] [2020-10-12 10:18:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:12,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:12,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:12,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:13,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:13,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:17,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:17,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 10:18:17,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:18:17,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:18:17,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:17,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:18:17,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:18:17,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:18:17,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:17,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:17,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:17,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:17,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:17,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:17,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:17,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:17,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:17,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:17,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:17,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:18:17,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:18:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:17,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:17,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:17,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:17,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:17,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:17,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:17,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:17,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:17,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:17,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:18:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-12 10:18:17,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424456569] [2020-10-12 10:18:17,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:17,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:18:17,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035847274] [2020-10-12 10:18:17,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:18:17,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:17,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:18:17,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:18:17,478 INFO L87 Difference]: Start difference. First operand 143 states and 155 transitions. Second operand 12 states. [2020-10-12 10:18:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:19,058 INFO L93 Difference]: Finished difference Result 203 states and 217 transitions. [2020-10-12 10:18:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:18:19,060 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-12 10:18:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:19,061 INFO L225 Difference]: With dead ends: 203 [2020-10-12 10:18:19,062 INFO L226 Difference]: Without dead ends: 139 [2020-10-12 10:18:19,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:18:19,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-12 10:18:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 124. [2020-10-12 10:18:19,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-12 10:18:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2020-10-12 10:18:19,075 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 62 [2020-10-12 10:18:19,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:19,075 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2020-10-12 10:18:19,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:18:19,076 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2020-10-12 10:18:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 10:18:19,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:19,076 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-12 10:18:19,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:18:19,077 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:19,077 INFO L82 PathProgramCache]: Analyzing trace with hash 521427519, now seen corresponding path program 2 times [2020-10-12 10:18:19,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:19,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094096629] [2020-10-12 10:18:19,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:19,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:19,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:20,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:21,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:22,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:23,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:24,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:24,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:24,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 10:18:24,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:18:24,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5415 [2020-10-12 10:18:24,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 10:18:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:18:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 10:18:24,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:25,212 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-12 10:18:25,372 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-12 10:18:25,533 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-12 10:18:25,738 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-12 10:18:25,947 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-12 10:18:26,171 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-12 10:18:26,348 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-12 10:18:26,571 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-12 10:18:26,793 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-12 10:18:27,009 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-12 10:18:27,351 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-12 10:18:27,650 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-12 10:18:28,063 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-12 10:18:28,350 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-12 10:18:28,746 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2020-10-12 10:18:29,029 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-12 10:18:29,322 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-12 10:18:29,589 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-12 10:18:29,905 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2020-10-12 10:18:30,212 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2020-10-12 10:18:30,545 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-10-12 10:18:30,836 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-12 10:18:31,066 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-10-12 10:18:31,310 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-10-12 10:18:31,564 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-12 10:18:31,934 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2020-10-12 10:18:33,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:33,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:33,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:33,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:33,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:33,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:33,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:33,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:33,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:33,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:33,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:33,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:18:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:33,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:33,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:33,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:33,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:33,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:33,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:33,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:33,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:33,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:33,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:33,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:18:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:33,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:33,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:33,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:33,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:33,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:18:33,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:33,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:33,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:33,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:33,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:18:33,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094096629] [2020-10-12 10:18:33,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:33,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 10:18:33,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358963724] [2020-10-12 10:18:33,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 10:18:33,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:33,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 10:18:33,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1670, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:18:33,701 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand 43 states. [2020-10-12 10:18:34,817 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-10-12 10:18:35,219 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-12 10:18:35,550 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-12 10:18:35,900 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-12 10:18:36,234 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-12 10:18:36,459 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-12 10:18:36,922 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-12 10:18:37,273 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-12 10:18:37,736 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-10-12 10:18:38,349 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 54 [2020-10-12 10:18:38,962 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 58 [2020-10-12 10:18:39,523 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-10-12 10:18:40,001 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-12 10:18:40,372 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-12 10:18:40,972 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2020-10-12 10:18:41,436 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2020-10-12 10:18:42,403 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-10-12 10:18:42,888 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 74 [2020-10-12 10:18:43,333 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-12 10:18:43,733 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-12 10:18:44,017 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-12 10:18:44,517 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-12 10:18:44,778 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-12 10:18:47,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:47,605 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2020-10-12 10:18:47,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 10:18:47,607 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 66 [2020-10-12 10:18:47,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:47,609 INFO L225 Difference]: With dead ends: 131 [2020-10-12 10:18:47,609 INFO L226 Difference]: Without dead ends: 127 [2020-10-12 10:18:47,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=416, Invalid=5436, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 10:18:47,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-12 10:18:47,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-12 10:18:47,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-12 10:18:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2020-10-12 10:18:47,625 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 66 [2020-10-12 10:18:47,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:47,625 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2020-10-12 10:18:47,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 10:18:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2020-10-12 10:18:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 10:18:47,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:47,626 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-12 10:18:47,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:18:47,626 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:47,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1680316193, now seen corresponding path program 11 times [2020-10-12 10:18:47,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:47,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594336234] [2020-10-12 10:18:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:47,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:49,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:50,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:52,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:52,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:52,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 10:18:52,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:18:52,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5290 [2020-10-12 10:18:52,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:52,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 10:18:52,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:18:52,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 10:18:52,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:53,481 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2020-10-12 10:18:53,628 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2020-10-12 10:18:53,763 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-12 10:18:53,904 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2020-10-12 10:18:54,124 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2020-10-12 10:18:54,377 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-10-12 10:18:54,597 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2020-10-12 10:18:54,874 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 52 [2020-10-12 10:18:55,110 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2020-10-12 10:18:55,384 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2020-10-12 10:18:55,794 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2020-10-12 10:18:56,198 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 59 [2020-10-12 10:18:56,681 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2020-10-12 10:18:57,121 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2020-10-12 10:18:57,564 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2020-10-12 10:18:57,971 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-12 10:18:58,516 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2020-10-12 10:18:59,013 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2020-10-12 10:18:59,719 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 71 [2020-10-12 10:19:00,327 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 63 [2020-10-12 10:19:01,078 WARN L193 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 68 [2020-10-12 10:19:01,714 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-12 10:19:02,380 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 65 [2020-10-12 10:19:02,891 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2020-10-12 10:19:03,336 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2020-10-12 10:19:03,831 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-12 10:19:04,426 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 63 [2020-10-12 10:19:04,950 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2020-10-12 10:19:05,490 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-10-12 10:19:05,976 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-12 10:19:06,623 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2020-10-12 10:19:07,133 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-12 10:19:07,618 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2020-10-12 10:19:07,947 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2020-10-12 10:19:08,298 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-12 10:19:08,681 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2020-10-12 10:19:08,963 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-12 10:19:10,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:10,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:10,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:10,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:10,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:10,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:10,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:10,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:10,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:10,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:10,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:10,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:19:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:10,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:10,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:10,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:10,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:10,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:19:10,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:10,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:10,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:10,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:10,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:19:10,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594336234] [2020-10-12 10:19:10,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:10,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 10:19:10,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158345665] [2020-10-12 10:19:10,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 10:19:10,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:10,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 10:19:10,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 10:19:10,648 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand 49 states. [2020-10-12 10:19:11,471 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-12 10:19:11,770 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2020-10-12 10:19:12,046 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2020-10-12 10:19:12,519 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-12 10:19:13,213 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 65 [2020-10-12 10:19:14,491 WARN L193 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 66 [2020-10-12 10:19:15,221 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-12 10:19:15,938 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 39 [2020-10-12 10:19:16,829 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-10-12 10:19:17,852 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 48 [2020-10-12 10:19:18,863 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 71 [2020-10-12 10:19:19,907 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-10-12 10:19:20,759 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 46 [2020-10-12 10:19:21,120 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-12 10:19:21,615 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-12 10:19:22,482 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 52 [2020-10-12 10:19:22,956 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-10-12 10:19:23,503 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 59 [2020-10-12 10:19:23,782 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-12 10:19:24,938 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 57 [2020-10-12 10:19:25,316 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-12 10:19:26,414 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 58 [2020-10-12 10:19:26,885 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-12 10:19:27,884 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 68