/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_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 13:37:55,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 13:37:55,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 13:37:55,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 13:37:55,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 13:37:55,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 13:37:55,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 13:37:55,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 13:37:55,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 13:37:55,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 13:37:55,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 13:37:55,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 13:37:55,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 13:37:55,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 13:37:55,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 13:37:55,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 13:37:55,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 13:37:55,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 13:37:55,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 13:37:55,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 13:37:55,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 13:37:55,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 13:37:55,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 13:37:55,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 13:37:55,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 13:37:55,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 13:37:55,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 13:37:55,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 13:37:55,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 13:37:55,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 13:37:55,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 13:37:55,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 13:37:55,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 13:37:55,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 13:37:55,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 13:37:55,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 13:37:55,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 13:37:55,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 13:37:55,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 13:37:55,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 13:37:55,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 13:37:55,390 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 13:37:55,412 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 13:37:55,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 13:37:55,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 13:37:55,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 13:37:55,414 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 13:37:55,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 13:37:55,415 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 13:37:55,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 13:37:55,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 13:37:55,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 13:37:55,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 13:37:55,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 13:37:55,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 13:37:55,416 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 13:37:55,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 13:37:55,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 13:37:55,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 13:37:55,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 13:37:55,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 13:37:55,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 13:37:55,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 13:37:55,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 13:37:55,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 13:37:55,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 13:37:55,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 13:37:55,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 13:37:55,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 13:37:55,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 13:37:55,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 13:37:55,419 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 13:37:55,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 13:37:55,732 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 13:37:55,736 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 13:37:55,737 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 13:37:55,738 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 13:37:55,738 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2020-10-12 13:37:55,817 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/03c007a79/6947af93a62048528973cca64a29995d/FLAG628c92888 [2020-10-12 13:37:56,633 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 13:37:56,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2020-10-12 13:37:56,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/03c007a79/6947af93a62048528973cca64a29995d/FLAG628c92888 [2020-10-12 13:37:57,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/03c007a79/6947af93a62048528973cca64a29995d [2020-10-12 13:37:57,157 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 13:37:57,160 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 13:37:57,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 13:37:57,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 13:37:57,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 13:37:57,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 01:37:57" (1/1) ... [2020-10-12 13:37:57,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e0c35a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:37:57, skipping insertion in model container [2020-10-12 13:37:57,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 01:37:57" (1/1) ... [2020-10-12 13:37:57,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 13:37:57,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 13:37:58,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 13:37:58,967 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 13:37:59,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 13:37:59,678 INFO L208 MainTranslator]: Completed translation [2020-10-12 13:37:59,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:37:59 WrapperNode [2020-10-12 13:37:59,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 13:37:59,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 13:37:59,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 13:37:59,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 13:37:59,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:37:59" (1/1) ... [2020-10-12 13:37:59,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:37:59" (1/1) ... [2020-10-12 13:37:59,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:37:59" (1/1) ... [2020-10-12 13:37:59,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:37:59" (1/1) ... [2020-10-12 13:37:59,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:37:59" (1/1) ... [2020-10-12 13:37:59,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:37:59" (1/1) ... [2020-10-12 13:37:59,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:37:59" (1/1) ... [2020-10-12 13:38:00,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 13:38:00,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 13:38:00,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 13:38:00,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 13:38:00,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:37:59" (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 13:38:00,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 13:38:00,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 13:38:00,091 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-12 13:38:00,091 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-12 13:38:00,091 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-12 13:38:00,092 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-12 13:38:00,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 13:38:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-12 13:38:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-12 13:38:00,094 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-12 13:38:00,094 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-12 13:38:00,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 13:38:00,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 13:38:00,094 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 13:38:00,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 13:38:00,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 13:38:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 13:38:11,890 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 13:38:11,891 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 13:38:11,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 01:38:11 BoogieIcfgContainer [2020-10-12 13:38:11,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 13:38:11,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 13:38:11,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 13:38:11,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 13:38:11,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 01:37:57" (1/3) ... [2020-10-12 13:38:11,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386163b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 01:38:11, skipping insertion in model container [2020-10-12 13:38:11,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:37:59" (2/3) ... [2020-10-12 13:38:11,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386163b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 01:38:11, skipping insertion in model container [2020-10-12 13:38:11,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 01:38:11" (3/3) ... [2020-10-12 13:38:11,912 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label20.c [2020-10-12 13:38:11,923 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 13:38:11,931 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 13:38:11,946 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 13:38:11,973 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 13:38:11,974 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 13:38:11,974 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 13:38:11,974 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 13:38:11,974 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 13:38:11,974 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 13:38:11,975 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 13:38:11,975 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 13:38:12,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-12 13:38:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 13:38:12,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:38:12,024 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:38:12,024 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:38:12,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:38:12,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1527050992, now seen corresponding path program 1 times [2020-10-12 13:38:12,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:38:12,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617081116] [2020-10-12 13:38:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:38:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:38:12,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:38:12,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:38:12,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 13:38:12,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:38:12,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-12 13:38:12,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:38:12,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:38:12,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:38:12,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 13:38:12,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 13:38:12,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:38:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:38:12,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:38:12,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:38:12,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:38:12,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:38:12,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 13:38:12,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:38:12,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:38:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:38:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:38:12,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:38:12,916 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 13:38:12,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617081116] [2020-10-12 13:38:12,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:38:12,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 13:38:12,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443974282] [2020-10-12 13:38:12,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 13:38:12,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:38:12,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 13:38:12,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 13:38:12,945 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-12 13:38:27,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:38:27,005 INFO L93 Difference]: Finished difference Result 3107 states and 5729 transitions. [2020-10-12 13:38:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 13:38:27,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-12 13:38:27,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:38:27,042 INFO L225 Difference]: With dead ends: 3107 [2020-10-12 13:38:27,042 INFO L226 Difference]: Without dead ends: 1903 [2020-10-12 13:38:27,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 13:38:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2020-10-12 13:38:27,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1883. [2020-10-12 13:38:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1883 states. [2020-10-12 13:38:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 2890 transitions. [2020-10-12 13:38:27,229 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 2890 transitions. Word has length 61 [2020-10-12 13:38:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:38:27,230 INFO L479 AbstractCegarLoop]: Abstraction has 1883 states and 2890 transitions. [2020-10-12 13:38:27,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 13:38:27,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 2890 transitions. [2020-10-12 13:38:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-12 13:38:27,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:38:27,237 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, 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] [2020-10-12 13:38:27,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 13:38:27,238 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:38:27,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:38:27,239 INFO L82 PathProgramCache]: Analyzing trace with hash 430477289, now seen corresponding path program 1 times [2020-10-12 13:38:27,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:38:27,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611481799] [2020-10-12 13:38:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:38:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:38:27,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:38:27,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:38:28,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:38:28,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:38:28,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-12 13:38:28,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:38:28,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1618 [2020-10-12 13:38:28,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:38:28,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:38:28,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:38:28,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 13:38:28,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:38:28,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:38:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:38:29,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:38:29,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:38:29,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:38:29,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:38:29,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 13:38:29,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:38:29,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:38:29,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:38:29,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:38:29,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:38:29,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:38:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:38:29,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:38:29,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:38:29,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 13:38:29,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:38:29,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-12 13:38:29,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:38:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:38:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:38:29,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 13:38:29,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 13:38:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:38:29,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611481799] [2020-10-12 13:38:29,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:38:29,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 13:38:29,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461543501] [2020-10-12 13:38:29,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:38:29,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:38:29,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:38:29,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:38:29,414 INFO L87 Difference]: Start difference. First operand 1883 states and 2890 transitions. Second operand 7 states. [2020-10-12 13:38:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:38:47,146 INFO L93 Difference]: Finished difference Result 5676 states and 8690 transitions. [2020-10-12 13:38:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 13:38:47,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 130 [2020-10-12 13:38:47,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:38:47,169 INFO L225 Difference]: With dead ends: 5676 [2020-10-12 13:38:47,169 INFO L226 Difference]: Without dead ends: 3799 [2020-10-12 13:38:47,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-12 13:38:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3799 states. [2020-10-12 13:38:47,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3799 to 3708. [2020-10-12 13:38:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3708 states. [2020-10-12 13:38:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 5284 transitions. [2020-10-12 13:38:47,282 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 5284 transitions. Word has length 130 [2020-10-12 13:38:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:38:47,283 INFO L479 AbstractCegarLoop]: Abstraction has 3708 states and 5284 transitions. [2020-10-12 13:38:47,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:38:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 5284 transitions. [2020-10-12 13:38:47,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-12 13:38:47,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:38:47,287 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, 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] [2020-10-12 13:38:47,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 13:38:47,287 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:38:47,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:38:47,288 INFO L82 PathProgramCache]: Analyzing trace with hash 987061561, now seen corresponding path program 1 times [2020-10-12 13:38:47,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:38:47,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675282823] [2020-10-12 13:38:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:38:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:38:47,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:38:47,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:38:48,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:38:48,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-12 13:38:48,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:38:48,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 902 [2020-10-12 13:38:48,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:38:48,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:38:48,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:38:48,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-12 13:38:48,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:38:48,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:38:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:38:48,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:38:48,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:38:48,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:38:48,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:38:48,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 13:38:48,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:38:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:38:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:38:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:38:48,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:38:48,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:38:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:38:48,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:38:48,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:38:48,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 13:38:48,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:38:48,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-12 13:38:48,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:38:48,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:38:48,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:38:48,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 13:38:48,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 13:38:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:38:48,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675282823] [2020-10-12 13:38:48,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:38:48,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 13:38:48,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697556084] [2020-10-12 13:38:48,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:38:48,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:38:48,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:38:48,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:38:48,726 INFO L87 Difference]: Start difference. First operand 3708 states and 5284 transitions. Second operand 7 states. [2020-10-12 13:39:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:39:05,749 INFO L93 Difference]: Finished difference Result 11010 states and 15847 transitions. [2020-10-12 13:39:05,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 13:39:05,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 138 [2020-10-12 13:39:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:39:05,786 INFO L225 Difference]: With dead ends: 11010 [2020-10-12 13:39:05,786 INFO L226 Difference]: Without dead ends: 7308 [2020-10-12 13:39:05,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-12 13:39:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7308 states. [2020-10-12 13:39:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7308 to 7182. [2020-10-12 13:39:05,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7182 states. [2020-10-12 13:39:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 9246 transitions. [2020-10-12 13:39:06,014 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 9246 transitions. Word has length 138 [2020-10-12 13:39:06,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:39:06,017 INFO L479 AbstractCegarLoop]: Abstraction has 7182 states and 9246 transitions. [2020-10-12 13:39:06,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:39:06,017 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 9246 transitions. [2020-10-12 13:39:06,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-12 13:39:06,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:39:06,024 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, 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] [2020-10-12 13:39:06,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 13:39:06,024 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:39:06,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:39:06,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1803564136, now seen corresponding path program 1 times [2020-10-12 13:39:06,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:39:06,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991393457] [2020-10-12 13:39:06,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:39:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:39:06,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:06,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:06,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:39:06,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-12 13:39:06,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:39:06,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 509 [2020-10-12 13:39:06,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:39:06,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:39:06,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-12 13:39:06,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 13:39:06,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:39:06,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:39:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:39:06,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:06,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:39:06,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:39:06,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:39:06,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 13:39:06,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:39:06,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:39:06,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:39:06,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:39:06,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:39:06,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:39:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:39:06,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:06,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:39:06,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 13:39:06,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:39:06,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-12 13:39:06,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:39:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:39:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:39:06,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-12 13:39:06,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:39:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:39:07,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991393457] [2020-10-12 13:39:07,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:39:07,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 13:39:07,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633325213] [2020-10-12 13:39:07,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 13:39:07,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:39:07,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 13:39:07,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 13:39:07,092 INFO L87 Difference]: Start difference. First operand 7182 states and 9246 transitions. Second operand 5 states. [2020-10-12 13:39:21,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:39:21,286 INFO L93 Difference]: Finished difference Result 11143 states and 14849 transitions. [2020-10-12 13:39:21,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 13:39:21,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 190 [2020-10-12 13:39:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:39:21,323 INFO L225 Difference]: With dead ends: 11143 [2020-10-12 13:39:21,323 INFO L226 Difference]: Without dead ends: 7201 [2020-10-12 13:39:21,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 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 13:39:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7201 states. [2020-10-12 13:39:21,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7201 to 7182. [2020-10-12 13:39:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7182 states. [2020-10-12 13:39:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 9238 transitions. [2020-10-12 13:39:21,602 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 9238 transitions. Word has length 190 [2020-10-12 13:39:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:39:21,604 INFO L479 AbstractCegarLoop]: Abstraction has 7182 states and 9238 transitions. [2020-10-12 13:39:21,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 13:39:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 9238 transitions. [2020-10-12 13:39:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-12 13:39:21,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:39:21,609 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, 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, 1, 1, 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 13:39:21,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 13:39:21,610 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:39:21,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:39:21,610 INFO L82 PathProgramCache]: Analyzing trace with hash -193370928, now seen corresponding path program 1 times [2020-10-12 13:39:21,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:39:21,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987217999] [2020-10-12 13:39:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:39:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:39:21,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:21,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:22,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:25,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:39:25,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-12 13:39:25,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:39:25,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3952 [2020-10-12 13:39:25,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:39:25,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:39:25,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:39:25,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-12 13:39:25,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:39:25,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:39:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:39:25,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:25,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:39:25,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:39:25,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:39:25,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 13:39:25,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:39:25,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:39:25,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:39:25,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:39:25,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:39:25,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:39:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:39:25,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:25,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:39:25,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 13:39:25,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:39:25,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-12 13:39:25,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:39:25,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:39:25,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:39:25,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 13:39:25,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:39:26,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-12 13:39:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:39:26,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:26,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:39:26,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 13:39:26,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:39:26,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-12 13:39:26,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:39:26,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:39:26,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-12 13:39:26,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:39:26,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:39:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 108 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 13:39:26,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987217999] [2020-10-12 13:39:26,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:39:26,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 13:39:26,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651338568] [2020-10-12 13:39:26,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:39:26,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:39:26,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:39:26,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:39:26,676 INFO L87 Difference]: Start difference. First operand 7182 states and 9238 transitions. Second operand 7 states. [2020-10-12 13:39:49,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:39:49,259 INFO L93 Difference]: Finished difference Result 13846 states and 18023 transitions. [2020-10-12 13:39:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 13:39:49,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 231 [2020-10-12 13:39:49,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:39:49,300 INFO L225 Difference]: With dead ends: 13846 [2020-10-12 13:39:49,300 INFO L226 Difference]: Without dead ends: 7473 [2020-10-12 13:39:49,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-12 13:39:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7473 states. [2020-10-12 13:39:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7473 to 7294. [2020-10-12 13:39:49,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7294 states. [2020-10-12 13:39:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7294 states to 7294 states and 9392 transitions. [2020-10-12 13:39:49,477 INFO L78 Accepts]: Start accepts. Automaton has 7294 states and 9392 transitions. Word has length 231 [2020-10-12 13:39:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:39:49,477 INFO L479 AbstractCegarLoop]: Abstraction has 7294 states and 9392 transitions. [2020-10-12 13:39:49,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:39:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 7294 states and 9392 transitions. [2020-10-12 13:39:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-12 13:39:49,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:39:49,481 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:39:49,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 13:39:49,482 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:39:49,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:39:49,482 INFO L82 PathProgramCache]: Analyzing trace with hash 851856448, now seen corresponding path program 1 times [2020-10-12 13:39:49,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:39:49,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195610] [2020-10-12 13:39:49,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:39:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:39:49,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:49,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:50,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:50,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:39:50,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-12 13:39:50,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:39:50,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1242 [2020-10-12 13:39:50,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:39:50,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:39:50,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-12 13:39:50,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-12 13:39:50,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:39:50,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:39:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:39:50,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:50,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:39:50,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:39:50,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:39:50,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 13:39:50,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:39:50,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:39:50,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:39:50,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:39:50,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:39:50,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:39:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:39:50,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:51,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:39:51,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 13:39:51,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:39:51,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-12 13:39:51,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:39:51,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:39:51,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:39:51,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-12 13:39:51,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:39:51,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-12 13:39:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:39:51,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:51,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:39:51,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:39:51,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 13:39:51,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:39:51,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-12 13:39:51,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:39:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:39:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:39:51,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 13:39:51,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:39:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 126 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 13:39:51,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195610] [2020-10-12 13:39:51,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:39:51,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 13:39:51,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738578450] [2020-10-12 13:39:51,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:39:51,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:39:51,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:39:51,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:39:51,570 INFO L87 Difference]: Start difference. First operand 7294 states and 9392 transitions. Second operand 7 states. [2020-10-12 13:40:19,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:40:19,941 INFO L93 Difference]: Finished difference Result 14790 states and 19963 transitions. [2020-10-12 13:40:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 13:40:19,943 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 238 [2020-10-12 13:40:19,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:40:19,971 INFO L225 Difference]: With dead ends: 14790 [2020-10-12 13:40:19,971 INFO L226 Difference]: Without dead ends: 8305 [2020-10-12 13:40:19,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-12 13:40:20,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8305 states. [2020-10-12 13:40:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8305 to 8132. [2020-10-12 13:40:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8132 states. [2020-10-12 13:40:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8132 states to 8132 states and 10861 transitions. [2020-10-12 13:40:20,195 INFO L78 Accepts]: Start accepts. Automaton has 8132 states and 10861 transitions. Word has length 238 [2020-10-12 13:40:20,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:40:20,196 INFO L479 AbstractCegarLoop]: Abstraction has 8132 states and 10861 transitions. [2020-10-12 13:40:20,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:40:20,196 INFO L276 IsEmpty]: Start isEmpty. Operand 8132 states and 10861 transitions. [2020-10-12 13:40:20,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-12 13:40:20,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:40:20,201 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, 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, 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 13:40:20,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 13:40:20,202 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:40:20,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:40:20,202 INFO L82 PathProgramCache]: Analyzing trace with hash -929858497, now seen corresponding path program 1 times [2020-10-12 13:40:20,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:40:20,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375794729] [2020-10-12 13:40:20,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:40:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:40:20,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:40:20,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:40:20,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:40:21,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:40:21,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-12 13:40:21,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:40:21,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1338 [2020-10-12 13:40:21,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:40:21,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:40:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-12 13:40:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-12 13:40:21,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:40:21,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:40:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:40:21,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:40:21,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:40:21,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:40:21,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:40:21,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 13:40:21,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:40:21,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:40:21,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:40:21,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:40:21,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:40:21,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:40:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:40:21,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:40:22,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:40:22,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 13:40:22,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:40:22,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-12 13:40:22,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:40:22,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:40:22,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:40:22,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-12 13:40:22,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:40:22,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-12 13:40:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:40:22,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:40:22,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:40:22,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:40:22,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 13:40:22,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:40:22,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-12 13:40:22,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:40:22,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:40:22,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:40:22,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 13:40:22,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:40:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 135 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 13:40:22,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375794729] [2020-10-12 13:40:22,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:40:22,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 13:40:22,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418970640] [2020-10-12 13:40:22,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:40:22,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:40:22,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:40:22,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:40:22,500 INFO L87 Difference]: Start difference. First operand 8132 states and 10861 transitions. Second operand 7 states. [2020-10-12 13:40:58,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:40:58,193 INFO L93 Difference]: Finished difference Result 22050 states and 30516 transitions. [2020-10-12 13:40:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 13:40:58,201 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 247 [2020-10-12 13:40:58,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:40:58,261 INFO L225 Difference]: With dead ends: 22050 [2020-10-12 13:40:58,261 INFO L226 Difference]: Without dead ends: 14738 [2020-10-12 13:40:58,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-12 13:40:58,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14738 states. [2020-10-12 13:40:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14738 to 14267. [2020-10-12 13:40:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14267 states. [2020-10-12 13:40:58,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14267 states to 14267 states and 18388 transitions. [2020-10-12 13:40:58,675 INFO L78 Accepts]: Start accepts. Automaton has 14267 states and 18388 transitions. Word has length 247 [2020-10-12 13:40:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:40:58,676 INFO L479 AbstractCegarLoop]: Abstraction has 14267 states and 18388 transitions. [2020-10-12 13:40:58,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:40:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 14267 states and 18388 transitions. [2020-10-12 13:40:58,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-10-12 13:40:58,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:40:58,682 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, 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, 1, 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 13:40:58,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 13:40:58,683 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:40:58,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:40:58,684 INFO L82 PathProgramCache]: Analyzing trace with hash 628219916, now seen corresponding path program 1 times [2020-10-12 13:40:58,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:40:58,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275219748] [2020-10-12 13:40:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:40:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:40:58,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:40:58,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:40:59,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:00,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:00,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-12 13:41:00,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:41:00,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1919 [2020-10-12 13:41:00,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:00,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:41:00,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-12 13:41:00,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-12 13:41:00,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:41:00,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:41:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:00,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:00,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:00,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:41:00,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:41:00,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 13:41:00,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:00,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:41:00,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:41:00,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:41:00,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:41:00,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:41:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:00,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:01,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:01,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 13:41:01,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:41:01,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-12 13:41:01,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:01,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:41:01,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:41:01,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-12 13:41:01,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:41:01,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-12 13:41:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:01,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:01,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:01,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-12 13:41:01,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:41:01,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-12 13:41:01,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:01,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:41:01,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:41:01,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-12 13:41:01,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:41:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 205 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 13:41:01,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275219748] [2020-10-12 13:41:01,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:41:01,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 13:41:01,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968692372] [2020-10-12 13:41:01,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:41:01,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:41:01,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:41:01,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:41:01,707 INFO L87 Difference]: Start difference. First operand 14267 states and 18388 transitions. Second operand 7 states. [2020-10-12 13:41:36,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:41:36,707 INFO L93 Difference]: Finished difference Result 31796 states and 42306 transitions. [2020-10-12 13:41:36,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 13:41:36,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 276 [2020-10-12 13:41:36,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:41:36,762 INFO L225 Difference]: With dead ends: 31796 [2020-10-12 13:41:36,762 INFO L226 Difference]: Without dead ends: 18351 [2020-10-12 13:41:36,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-12 13:41:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18351 states. [2020-10-12 13:41:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18351 to 17757. [2020-10-12 13:41:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17757 states. [2020-10-12 13:41:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17757 states to 17757 states and 22421 transitions. [2020-10-12 13:41:38,038 INFO L78 Accepts]: Start accepts. Automaton has 17757 states and 22421 transitions. Word has length 276 [2020-10-12 13:41:38,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:41:38,038 INFO L479 AbstractCegarLoop]: Abstraction has 17757 states and 22421 transitions. [2020-10-12 13:41:38,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:41:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 17757 states and 22421 transitions. [2020-10-12 13:41:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-12 13:41:38,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:41:38,043 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:41:38,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 13:41:38,044 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:41:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:41:38,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1935387243, now seen corresponding path program 1 times [2020-10-12 13:41:38,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:41:38,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748471904] [2020-10-12 13:41:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:41:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:38,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:38,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:38,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:38,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-12 13:41:38,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:41:38,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 785 [2020-10-12 13:41:38,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:38,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:41:38,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 232 [2020-10-12 13:41:38,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 13:41:38,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:41:39,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:41:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:39,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:39,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:39,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:41:39,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:41:39,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 13:41:39,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:39,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:41:39,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:41:39,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:41:39,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:41:39,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:41:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:41:39,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:41:39,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:41:39,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-12 13:41:39,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:41:39,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-12 13:41:39,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:41:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:41:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:41:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-12 13:41:39,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:41:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:41:39,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748471904] [2020-10-12 13:41:39,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:41:39,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 13:41:39,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826101321] [2020-10-12 13:41:39,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 13:41:39,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:41:39,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 13:41:39,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 13:41:39,773 INFO L87 Difference]: Start difference. First operand 17757 states and 22421 transitions. Second operand 5 states.