/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/eca-rers2012/Problem13_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 13:40:41,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 13:40:41,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 13:40:41,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 13:40:41,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 13:40:41,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 13:40:41,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 13:40:41,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 13:40:41,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 13:40:41,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 13:40:41,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 13:40:41,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 13:40:41,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 13:40:41,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 13:40:41,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 13:40:41,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 13:40:41,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 13:40:41,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 13:40:41,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 13:40:41,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 13:40:41,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 13:40:41,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 13:40:41,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 13:40:41,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 13:40:41,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 13:40:41,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 13:40:41,942 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 13:40:41,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 13:40:41,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 13:40:41,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 13:40:41,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 13:40:41,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 13:40:41,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 13:40:41,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 13:40:41,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 13:40:41,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 13:40:41,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 13:40:41,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 13:40:41,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 13:40:41,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 13:40:41,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 13:40:41,961 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 13:40:42,016 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 13:40:42,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 13:40:42,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 13:40:42,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 13:40:42,020 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 13:40:42,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 13:40:42,021 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 13:40:42,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 13:40:42,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 13:40:42,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 13:40:42,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 13:40:42,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 13:40:42,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 13:40:42,024 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 13:40:42,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 13:40:42,024 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 13:40:42,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 13:40:42,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 13:40:42,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 13:40:42,025 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 13:40:42,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 13:40:42,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 13:40:42,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 13:40:42,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 13:40:42,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 13:40:42,026 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 13:40:42,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 13:40:42,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 13:40:42,027 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 13:40:42,027 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 13:40:42,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 13:40:42,369 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 13:40:42,373 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 13:40:42,376 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 13:40:42,376 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 13:40:42,377 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label27.c [2020-10-12 13:40:42,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6e5b4065/1d923a57414543f09a8ed52d4d5777cc/FLAG0896bb45f [2020-10-12 13:40:43,347 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 13:40:43,348 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label27.c [2020-10-12 13:40:43,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6e5b4065/1d923a57414543f09a8ed52d4d5777cc/FLAG0896bb45f [2020-10-12 13:40:43,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6e5b4065/1d923a57414543f09a8ed52d4d5777cc [2020-10-12 13:40:43,857 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 13:40:43,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 13:40:43,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 13:40:43,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 13:40:43,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 13:40:43,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 01:40:43" (1/1) ... [2020-10-12 13:40:43,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47a8d835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:43, skipping insertion in model container [2020-10-12 13:40:43,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 01:40:43" (1/1) ... [2020-10-12 13:40:43,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 13:40:44,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 13:40:46,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 13:40:46,089 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 13:40:46,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 13:40:46,831 INFO L208 MainTranslator]: Completed translation [2020-10-12 13:40:46,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:46 WrapperNode [2020-10-12 13:40:46,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 13:40:46,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 13:40:46,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 13:40:46,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 13:40:46,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:46" (1/1) ... [2020-10-12 13:40:46,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:46" (1/1) ... [2020-10-12 13:40:46,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:46" (1/1) ... [2020-10-12 13:40:46,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:46" (1/1) ... [2020-10-12 13:40:47,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:46" (1/1) ... [2020-10-12 13:40:47,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:46" (1/1) ... [2020-10-12 13:40:47,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:46" (1/1) ... [2020-10-12 13:40:47,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 13:40:47,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 13:40:47,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 13:40:47,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 13:40:47,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:46" (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 13:40:47,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 13:40:47,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 13:40:47,343 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-12 13:40:47,343 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-12 13:40:47,343 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-12 13:40:47,344 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-12 13:40:47,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 13:40:47,345 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-12 13:40:47,346 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-12 13:40:47,346 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-12 13:40:47,346 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-12 13:40:47,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 13:40:47,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 13:40:47,347 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 13:40:47,347 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 13:40:47,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 13:40:47,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 13:41:00,106 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 13:41:00,106 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 13:41:00,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 01:41:00 BoogieIcfgContainer [2020-10-12 13:41:00,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 13:41:00,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 13:41:00,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 13:41:00,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 13:41:00,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 01:40:43" (1/3) ... [2020-10-12 13:41:00,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12698573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 01:41:00, skipping insertion in model container [2020-10-12 13:41:00,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:40:46" (2/3) ... [2020-10-12 13:41:00,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12698573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 01:41:00, skipping insertion in model container [2020-10-12 13:41:00,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 01:41:00" (3/3) ... [2020-10-12 13:41:00,138 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label27.c [2020-10-12 13:41:00,153 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 13:41:00,167 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 13:41:00,187 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 13:41:00,223 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 13:41:00,224 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 13:41:00,224 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 13:41:00,224 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 13:41:00,224 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 13:41:00,224 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 13:41:00,225 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 13:41:00,225 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 13:41:00,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-12 13:41:00,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 13:41:00,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:41:00,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:41:00,290 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:41:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:41:00,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1839105400, now seen corresponding path program 1 times [2020-10-12 13:41:00,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:41:00,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462847451] [2020-10-12 13:41:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:41:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:00,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:01,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:01,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 13:41:01,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:41:01,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-10-12 13:41:01,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:01,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:41:01,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:41:01,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 13:41:01,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 13:41:01,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:41:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:01,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:01,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:01,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:41:01,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:41:01,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 13:41:01,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:01,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:41:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:41:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:41:01,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 13:41:01,320 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 13:41:01,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462847451] [2020-10-12 13:41:01,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:41:01,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 13:41:01,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689345235] [2020-10-12 13:41:01,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 13:41:01,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:41:01,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 13:41:01,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 13:41:01,360 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-12 13:41:17,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:41:17,079 INFO L93 Difference]: Finished difference Result 3243 states and 5948 transitions. [2020-10-12 13:41:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 13:41:17,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-12 13:41:17,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:41:17,122 INFO L225 Difference]: With dead ends: 3243 [2020-10-12 13:41:17,122 INFO L226 Difference]: Without dead ends: 2045 [2020-10-12 13:41:17,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 13:41:17,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2020-10-12 13:41:17,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1988. [2020-10-12 13:41:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1988 states. [2020-10-12 13:41:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3533 transitions. [2020-10-12 13:41:17,287 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3533 transitions. Word has length 51 [2020-10-12 13:41:17,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:41:17,288 INFO L479 AbstractCegarLoop]: Abstraction has 1988 states and 3533 transitions. [2020-10-12 13:41:17,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 13:41:17,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3533 transitions. [2020-10-12 13:41:17,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-12 13:41:17,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:41:17,295 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2020-10-12 13:41:17,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 13:41:17,295 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:41:17,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:41:17,296 INFO L82 PathProgramCache]: Analyzing trace with hash -25289727, now seen corresponding path program 1 times [2020-10-12 13:41:17,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:41:17,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529835785] [2020-10-12 13:41:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:41:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:17,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:17,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:18,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:18,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:18,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 13:41:18,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:41:18,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1441 [2020-10-12 13:41:18,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:18,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:41:18,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:41:18,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 13:41:18,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:41:18,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:41:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:18,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:18,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:18,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:41:18,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:41:18,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 13:41:18,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:41:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:41:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:41:18,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:41:18,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:41:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:18,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:19,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:19,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 13:41:19,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:41:19,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-12 13:41:19,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:19,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:41:19,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:41:19,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 13:41:19,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:41:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:41:19,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529835785] [2020-10-12 13:41:19,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:41:19,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 13:41:19,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600268776] [2020-10-12 13:41:19,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 13:41:19,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:41:19,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 13:41:19,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 13:41:19,114 INFO L87 Difference]: Start difference. First operand 1988 states and 3533 transitions. Second operand 8 states. [2020-10-12 13:41:41,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:41:41,482 INFO L93 Difference]: Finished difference Result 7338 states and 13417 transitions. [2020-10-12 13:41:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 13:41:41,483 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 120 [2020-10-12 13:41:41,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:41:41,522 INFO L225 Difference]: With dead ends: 7338 [2020-10-12 13:41:41,522 INFO L226 Difference]: Without dead ends: 5356 [2020-10-12 13:41:41,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-12 13:41:41,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2020-10-12 13:41:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 5331. [2020-10-12 13:41:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5331 states. [2020-10-12 13:41:41,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 8095 transitions. [2020-10-12 13:41:41,721 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 8095 transitions. Word has length 120 [2020-10-12 13:41:41,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:41:41,724 INFO L479 AbstractCegarLoop]: Abstraction has 5331 states and 8095 transitions. [2020-10-12 13:41:41,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 13:41:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 8095 transitions. [2020-10-12 13:41:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 13:41:41,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:41:41,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:41:41,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 13:41:41,737 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:41:41,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:41:41,738 INFO L82 PathProgramCache]: Analyzing trace with hash 431799949, now seen corresponding path program 1 times [2020-10-12 13:41:41,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:41:41,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908846602] [2020-10-12 13:41:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:41:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:41,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:41,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:42,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:43,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:43,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-12 13:41:43,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:41:43,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1812 [2020-10-12 13:41:43,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:43,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:41:43,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:41:43,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 13:41:43,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:41:43,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:41:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:43,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:43,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:43,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:41:43,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:41:43,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 13:41:43,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:43,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:41:43,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:41:43,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:41:43,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:41:43,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:41:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:43,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:43,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:43,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 13:41:43,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:41:43,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-12 13:41:43,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:43,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:41:43,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:41:43,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 13:41:43,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:41:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:41:44,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908846602] [2020-10-12 13:41:44,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:41:44,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 13:41:44,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138595124] [2020-10-12 13:41:44,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:41:44,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:41:44,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:41:44,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:41:44,096 INFO L87 Difference]: Start difference. First operand 5331 states and 8095 transitions. Second operand 7 states. [2020-10-12 13:42:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:42:06,157 INFO L93 Difference]: Finished difference Result 14367 states and 22908 transitions. [2020-10-12 13:42:06,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 13:42:06,160 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2020-10-12 13:42:06,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:42:06,316 INFO L225 Difference]: With dead ends: 14367 [2020-10-12 13:42:06,317 INFO L226 Difference]: Without dead ends: 9042 [2020-10-12 13:42:06,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-12 13:42:06,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9042 states. [2020-10-12 13:42:06,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9042 to 8761. [2020-10-12 13:42:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8761 states. [2020-10-12 13:42:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8761 states to 8761 states and 12159 transitions. [2020-10-12 13:42:06,714 INFO L78 Accepts]: Start accepts. Automaton has 8761 states and 12159 transitions. Word has length 126 [2020-10-12 13:42:06,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:42:06,715 INFO L479 AbstractCegarLoop]: Abstraction has 8761 states and 12159 transitions. [2020-10-12 13:42:06,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:42:06,716 INFO L276 IsEmpty]: Start isEmpty. Operand 8761 states and 12159 transitions. [2020-10-12 13:42:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-12 13:42:06,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:42:06,718 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:42:06,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 13:42:06,722 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:42:06,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:42:06,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1856995511, now seen corresponding path program 1 times [2020-10-12 13:42:06,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:42:06,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879829886] [2020-10-12 13:42:06,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:42:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:06,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:07,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:07,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:07,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-12 13:42:07,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:42:07,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 697 [2020-10-12 13:42:07,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:07,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:42:07,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:42:07,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-12 13:42:07,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:42:07,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:42:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:07,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:07,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:07,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:42:07,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:42:07,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 13:42:07,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:07,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:42:07,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:42:07,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:42:07,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:42:07,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:42:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:07,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:07,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:07,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 13:42:07,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:42:07,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-12 13:42:07,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:07,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:42:07,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:42:07,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-12 13:42:07,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:42:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:42:07,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879829886] [2020-10-12 13:42:07,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:42:07,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 13:42:07,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665822067] [2020-10-12 13:42:07,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:42:07,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:42:07,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:42:07,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:42:07,876 INFO L87 Difference]: Start difference. First operand 8761 states and 12159 transitions. Second operand 7 states. [2020-10-12 13:42:28,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:42:28,868 INFO L93 Difference]: Finished difference Result 18865 states and 27179 transitions. [2020-10-12 13:42:28,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 13:42:28,873 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 156 [2020-10-12 13:42:28,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:42:28,941 INFO L225 Difference]: With dead ends: 18865 [2020-10-12 13:42:28,941 INFO L226 Difference]: Without dead ends: 10110 [2020-10-12 13:42:28,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-12 13:42:28,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10110 states. [2020-10-12 13:42:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10110 to 9670. [2020-10-12 13:42:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9670 states. [2020-10-12 13:42:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9670 states to 9670 states and 13228 transitions. [2020-10-12 13:42:29,280 INFO L78 Accepts]: Start accepts. Automaton has 9670 states and 13228 transitions. Word has length 156 [2020-10-12 13:42:29,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:42:29,282 INFO L479 AbstractCegarLoop]: Abstraction has 9670 states and 13228 transitions. [2020-10-12 13:42:29,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:42:29,282 INFO L276 IsEmpty]: Start isEmpty. Operand 9670 states and 13228 transitions. [2020-10-12 13:42:29,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-12 13:42:29,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:42:29,289 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:42:29,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 13:42:29,290 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:42:29,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:42:29,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2116741795, now seen corresponding path program 1 times [2020-10-12 13:42:29,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:42:29,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018605420] [2020-10-12 13:42:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:42:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:29,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:29,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:30,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:30,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-12 13:42:30,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:42:30,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1637 [2020-10-12 13:42:30,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:30,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:42:30,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:42:30,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-12 13:42:30,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:42:31,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:42:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:31,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:31,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:31,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:42:31,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:42:31,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 13:42:31,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:31,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:42:31,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:42:31,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:42:31,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:42:31,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:42:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:31,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:31,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:31,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-12 13:42:31,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:42:31,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-12 13:42:31,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:31,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:42:31,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:42:31,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-12 13:42:31,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:42:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:42:31,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018605420] [2020-10-12 13:42:31,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:42:31,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 13:42:31,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119997275] [2020-10-12 13:42:31,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:42:31,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:42:31,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:42:31,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:42:31,772 INFO L87 Difference]: Start difference. First operand 9670 states and 13228 transitions. Second operand 7 states. [2020-10-12 13:42:50,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:42:50,556 INFO L93 Difference]: Finished difference Result 18850 states and 26199 transitions. [2020-10-12 13:42:50,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 13:42:50,561 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 166 [2020-10-12 13:42:50,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:42:50,594 INFO L225 Difference]: With dead ends: 18850 [2020-10-12 13:42:50,594 INFO L226 Difference]: Without dead ends: 9989 [2020-10-12 13:42:50,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-12 13:42:50,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9989 states. [2020-10-12 13:42:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9989 to 9668. [2020-10-12 13:42:50,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9668 states. [2020-10-12 13:42:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9668 states to 9668 states and 13139 transitions. [2020-10-12 13:42:50,834 INFO L78 Accepts]: Start accepts. Automaton has 9668 states and 13139 transitions. Word has length 166 [2020-10-12 13:42:50,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:42:50,835 INFO L479 AbstractCegarLoop]: Abstraction has 9668 states and 13139 transitions. [2020-10-12 13:42:50,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:42:50,835 INFO L276 IsEmpty]: Start isEmpty. Operand 9668 states and 13139 transitions. [2020-10-12 13:42:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-12 13:42:50,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:42:50,838 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:42:50,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 13:42:50,838 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:42:50,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:42:50,839 INFO L82 PathProgramCache]: Analyzing trace with hash 27800384, now seen corresponding path program 1 times [2020-10-12 13:42:50,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:42:50,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456714269] [2020-10-12 13:42:50,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:42:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:50,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:51,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:51,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:51,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-12 13:42:51,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:42:51,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 945 [2020-10-12 13:42:51,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:51,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 13:42:51,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:42:51,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-12 13:42:51,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:42:51,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:42:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:51,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:51,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:51,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:42:51,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:42:51,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 13:42:51,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:51,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:42:51,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:42:51,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:42:51,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:42:51,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:42:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:42:52,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:52,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:42:52,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:42:52,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 13:42:52,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:42:52,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-12 13:42:52,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:42:52,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:42:52,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:42:52,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-12 13:42:52,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:42:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 13:42:52,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456714269] [2020-10-12 13:42:52,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:42:52,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 13:42:52,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734735508] [2020-10-12 13:42:52,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 13:42:52,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:42:52,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 13:42:52,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 13:42:52,475 INFO L87 Difference]: Start difference. First operand 9668 states and 13139 transitions. Second operand 6 states. [2020-10-12 13:43:16,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:43:16,717 INFO L93 Difference]: Finished difference Result 24739 states and 35877 transitions. [2020-10-12 13:43:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 13:43:16,720 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2020-10-12 13:43:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:43:16,774 INFO L225 Difference]: With dead ends: 24739 [2020-10-12 13:43:16,774 INFO L226 Difference]: Without dead ends: 15880 [2020-10-12 13:43:16,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 13:43:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15880 states. [2020-10-12 13:43:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15880 to 15772. [2020-10-12 13:43:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15772 states. [2020-10-12 13:43:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15772 states to 15772 states and 20776 transitions. [2020-10-12 13:43:17,155 INFO L78 Accepts]: Start accepts. Automaton has 15772 states and 20776 transitions. Word has length 180 [2020-10-12 13:43:17,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:43:17,156 INFO L479 AbstractCegarLoop]: Abstraction has 15772 states and 20776 transitions. [2020-10-12 13:43:17,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 13:43:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 15772 states and 20776 transitions. [2020-10-12 13:43:17,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-12 13:43:17,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:43:17,162 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 13:43:17,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 13:43:17,163 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:43:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:43:17,164 INFO L82 PathProgramCache]: Analyzing trace with hash -118923906, now seen corresponding path program 1 times [2020-10-12 13:43:17,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:43:17,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852223690] [2020-10-12 13:43:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:43:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:43:17,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:17,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:18,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:19,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:43:19,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-12 13:43:19,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:43:19,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2045 [2020-10-12 13:43:19,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:43:19,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:43:19,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 230 [2020-10-12 13:43:19,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 13:43:19,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:43:19,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:43:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:43:19,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:19,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:43:19,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:43:19,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:43:19,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 13:43:19,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:43:19,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:43:19,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:43:19,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:43:19,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:43:19,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:43:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:43:19,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:19,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:43:19,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 13:43:19,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:43:19,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-12 13:43:19,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:43:19,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:43:19,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:43:19,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:43:19,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:43:19,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-12 13:43:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:43:19,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:19,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:43:19,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 13:43:19,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:43:19,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-12 13:43:19,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:43:19,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:43:19,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:43:19,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 13:43:19,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:43:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-12 13:43:19,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852223690] [2020-10-12 13:43:19,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:43:19,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 13:43:19,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389943264] [2020-10-12 13:43:19,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 13:43:19,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:43:19,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 13:43:19,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 13:43:19,801 INFO L87 Difference]: Start difference. First operand 15772 states and 20776 transitions. Second operand 5 states. [2020-10-12 13:43:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:43:44,849 INFO L93 Difference]: Finished difference Result 39106 states and 54362 transitions. [2020-10-12 13:43:44,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 13:43:44,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 270 [2020-10-12 13:43:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:43:44,934 INFO L225 Difference]: With dead ends: 39106 [2020-10-12 13:43:44,935 INFO L226 Difference]: Without dead ends: 24143 [2020-10-12 13:43:44,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 13:43:45,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24143 states. [2020-10-12 13:43:45,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24143 to 24071. [2020-10-12 13:43:45,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24071 states. [2020-10-12 13:43:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24071 states to 24071 states and 31102 transitions. [2020-10-12 13:43:45,474 INFO L78 Accepts]: Start accepts. Automaton has 24071 states and 31102 transitions. Word has length 270 [2020-10-12 13:43:45,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:43:45,476 INFO L479 AbstractCegarLoop]: Abstraction has 24071 states and 31102 transitions. [2020-10-12 13:43:45,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 13:43:45,476 INFO L276 IsEmpty]: Start isEmpty. Operand 24071 states and 31102 transitions. [2020-10-12 13:43:45,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-12 13:43:45,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:43:45,482 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:43:45,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 13:43:45,482 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:43:45,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:43:45,483 INFO L82 PathProgramCache]: Analyzing trace with hash -888566151, now seen corresponding path program 1 times [2020-10-12 13:43:45,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:43:45,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969041272] [2020-10-12 13:43:45,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:43:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:43:45,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:45,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:46,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:47,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:48,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:49,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:43:49,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-12 13:43:49,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 13:43:49,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4253 [2020-10-12 13:43:49,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:43:49,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 13:43:49,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:43:49,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 279 [2020-10-12 13:43:49,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:43:50,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:43:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:43:50,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:50,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:43:50,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:43:50,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:43:50,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 13:43:50,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:43:50,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:43:50,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:43:50,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:43:50,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:43:50,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:43:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:43:50,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:50,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:50,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:43:50,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 13:43:50,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:43:50,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-12 13:43:50,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:43:50,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:43:50,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:43:50,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-12 13:43:50,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:43:50,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-12 13:43:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:43:50,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:51,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:51,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:43:51,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 13:43:51,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:43:51,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-12 13:43:51,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:43:51,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 13:43:51,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:43:51,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 13:43:51,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:43:52,081 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-12 13:43:52,409 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-12 13:43:52,752 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-12 13:43:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 28 proven. 149 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 13:43:53,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969041272] [2020-10-12 13:43:53,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:43:53,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 13:43:53,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460446099] [2020-10-12 13:43:53,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 13:43:53,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:43:53,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 13:43:53,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-12 13:43:53,757 INFO L87 Difference]: Start difference. First operand 24071 states and 31102 transitions. Second operand 12 states. [2020-10-12 13:43:54,001 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-12 13:43:58,065 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-12 13:43:58,362 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-10-12 13:43:58,660 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-12 13:43:58,999 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-12 13:43:59,281 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-12 13:44:00,098 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-12 13:44:00,933 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-10-12 13:44:01,255 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-12 13:44:01,961 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2020-10-12 13:44:02,711 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2020-10-12 13:44:02,992 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-12 13:44:04,278 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-12 13:44:04,691 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-10-12 13:44:08,767 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-10-12 13:44:13,422 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-10-12 13:44:36,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:44:36,909 INFO L93 Difference]: Finished difference Result 32174 states and 44891 transitions. [2020-10-12 13:44:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 13:44:36,913 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 273 [2020-10-12 13:44:36,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:44:37,023 INFO L225 Difference]: With dead ends: 32174 [2020-10-12 13:44:37,023 INFO L226 Difference]: Without dead ends: 32172 [2020-10-12 13:44:37,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 13:44:37,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32172 states. [2020-10-12 13:44:37,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32172 to 26800. [2020-10-12 13:44:37,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26800 states. [2020-10-12 13:44:37,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26800 states to 26800 states and 35991 transitions. [2020-10-12 13:44:37,654 INFO L78 Accepts]: Start accepts. Automaton has 26800 states and 35991 transitions. Word has length 273 [2020-10-12 13:44:37,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:44:37,655 INFO L479 AbstractCegarLoop]: Abstraction has 26800 states and 35991 transitions. [2020-10-12 13:44:37,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 13:44:37,655 INFO L276 IsEmpty]: Start isEmpty. Operand 26800 states and 35991 transitions. [2020-10-12 13:44:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-12 13:44:37,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:44:37,665 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 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 13:44:37,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 13:44:37,665 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:44:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:44:37,666 INFO L82 PathProgramCache]: Analyzing trace with hash 155210443, now seen corresponding path program 1 times [2020-10-12 13:44:37,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:44:37,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687429471] [2020-10-12 13:44:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:44:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:44:37,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:44:38,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:44:38,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking...