/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=NARROWEST --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/Problem19_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:10:03,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:10:03,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:10:03,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:10:03,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:10:03,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:10:03,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:10:03,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:10:03,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:10:03,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:10:03,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:10:03,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:10:03,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:10:03,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:10:03,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:10:03,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:10:03,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:10:03,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:10:03,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:10:03,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:10:03,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:10:03,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:10:03,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:10:03,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:10:03,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:10:03,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:10:03,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:10:03,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:10:03,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:10:03,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:10:03,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:10:03,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:10:03,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:10:03,983 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:10:03,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:10:03,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:10:03,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:10:03,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:10:03,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:10:03,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:10:03,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:10:03,988 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 [2020-10-13 10:10:04,031 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:10:04,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:10:04,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:10:04,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:10:04,033 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:10:04,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:10:04,034 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:10:04,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:10:04,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:10:04,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:10:04,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:10:04,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:10:04,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:10:04,036 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:10:04,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:10:04,036 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:10:04,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:10:04,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:10:04,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:10:04,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:10:04,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:10:04,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:10:04,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:10:04,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:10:04,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:10:04,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:10:04,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:10:04,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:10:04,041 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:10:04,041 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:10:04,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:10:04,359 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:10:04,365 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:10:04,367 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:10:04,368 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:10:04,368 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label47.c [2020-10-13 10:10:04,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/979e705c1/a37ea91c9bdc4bf08e161907dbd23122/FLAGb089e7117 [2020-10-13 10:10:05,285 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:10:05,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label47.c [2020-10-13 10:10:05,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/979e705c1/a37ea91c9bdc4bf08e161907dbd23122/FLAGb089e7117 [2020-10-13 10:10:05,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/979e705c1/a37ea91c9bdc4bf08e161907dbd23122 [2020-10-13 10:10:05,729 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:10:05,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:10:05,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:10:05,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:10:05,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:10:05,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:10:05" (1/1) ... [2020-10-13 10:10:05,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@688a0e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:10:05, skipping insertion in model container [2020-10-13 10:10:05,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:10:05" (1/1) ... [2020-10-13 10:10:05,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:10:05,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:10:08,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:10:08,254 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:10:09,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:10:09,349 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:10:09,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:10:09 WrapperNode [2020-10-13 10:10:09,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:10:09,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:10:09,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:10:09,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:10:09,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:10:09" (1/1) ... [2020-10-13 10:10:09,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:10:09" (1/1) ... [2020-10-13 10:10:09,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:10:09" (1/1) ... [2020-10-13 10:10:09,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:10:09" (1/1) ... [2020-10-13 10:10:09,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:10:09" (1/1) ... [2020-10-13 10:10:09,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:10:09" (1/1) ... [2020-10-13 10:10:09,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:10:09" (1/1) ... [2020-10-13 10:10:09,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:10:09,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:10:09,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:10:09,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:10:09,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:10:09" (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 [2020-10-13 10:10:09,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:10:09,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:10:09,998 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:10:09,999 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:10:09,999 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:10:09,999 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:10:09,999 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:10:10,000 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:10:10,001 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:10:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:10:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:10:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:10:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:10:10,002 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:10:10,002 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:10:10,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:10:10,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:10:10,003 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:10:10,003 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:10:10,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:10:10,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:10:22,050 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:10:22,051 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:10:22,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:10:22 BoogieIcfgContainer [2020-10-13 10:10:22,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:10:22,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:10:22,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:10:22,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:10:22,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:10:05" (1/3) ... [2020-10-13 10:10:22,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b5ae8bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:10:22, skipping insertion in model container [2020-10-13 10:10:22,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:10:09" (2/3) ... [2020-10-13 10:10:22,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b5ae8bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:10:22, skipping insertion in model container [2020-10-13 10:10:22,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:10:22" (3/3) ... [2020-10-13 10:10:22,076 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label47.c [2020-10-13 10:10:22,086 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:10:22,096 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:10:22,109 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:10:22,141 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:10:22,141 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:10:22,141 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:10:22,142 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:10:22,142 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:10:22,142 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:10:22,142 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:10:22,142 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:10:22,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:10:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:10:22,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:10:22,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:10:22,193 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:10:22,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:10:22,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1648095394, now seen corresponding path program 1 times [2020-10-13 10:10:22,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:10:22,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835677915] [2020-10-13 10:10:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:10:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:22,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:22,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:22,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:10:22,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:22,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-13 10:10:22,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:22,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:10:22,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:10:22,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:10:22,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:10:22,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:10:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:22,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:22,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:22,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:10:22,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:22,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:10:22,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:22,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:10:22,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:22,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:10:22,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:10:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:10:22,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835677915] [2020-10-13 10:10:22,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:10:22,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:10:22,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524432345] [2020-10-13 10:10:22,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:10:22,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:10:22,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:10:22,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:10:22,829 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 10:10:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:10:45,839 INFO L93 Difference]: Finished difference Result 5095 states and 9566 transitions. [2020-10-13 10:10:45,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:10:45,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 10:10:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:10:45,897 INFO L225 Difference]: With dead ends: 5095 [2020-10-13 10:10:45,898 INFO L226 Difference]: Without dead ends: 3254 [2020-10-13 10:10:45,916 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 [2020-10-13 10:10:45,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3254 states. [2020-10-13 10:10:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3254 to 3208. [2020-10-13 10:10:46,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3208 states. [2020-10-13 10:10:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 5177 transitions. [2020-10-13 10:10:46,141 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 5177 transitions. Word has length 14 [2020-10-13 10:10:46,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:10:46,141 INFO L479 AbstractCegarLoop]: Abstraction has 3208 states and 5177 transitions. [2020-10-13 10:10:46,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:10:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 5177 transitions. [2020-10-13 10:10:46,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 10:10:46,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:10:46,146 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 10:10:46,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:10:46,147 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:10:46,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:10:46,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1208737287, now seen corresponding path program 1 times [2020-10-13 10:10:46,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:10:46,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710751620] [2020-10-13 10:10:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:10:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:46,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:46,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:47,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:47,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:47,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 10:10:47,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:10:47,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1688 [2020-10-13 10:10:47,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:47,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:10:47,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-13 10:10:47,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:10:47,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 10:10:47,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:10:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:47,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:48,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:48,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:10:48,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:48,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:10:48,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:48,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:10:48,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:48,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:10:48,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:10:48,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:10:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:48,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:48,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:48,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:10:48,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:48,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-13 10:10:48,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:48,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:10:48,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:48,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 10:10:48,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:10:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:10:48,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710751620] [2020-10-13 10:10:48,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:10:48,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:10:48,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050138156] [2020-10-13 10:10:48,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:10:48,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:10:48,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:10:48,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:10:48,242 INFO L87 Difference]: Start difference. First operand 3208 states and 5177 transitions. Second operand 5 states. [2020-10-13 10:11:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:11:16,987 INFO L93 Difference]: Finished difference Result 9268 states and 15108 transitions. [2020-10-13 10:11:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:11:16,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-10-13 10:11:16,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:11:17,020 INFO L225 Difference]: With dead ends: 9268 [2020-10-13 10:11:17,020 INFO L226 Difference]: Without dead ends: 6066 [2020-10-13 10:11:17,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:11:17,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6066 states. [2020-10-13 10:11:17,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6066 to 6057. [2020-10-13 10:11:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6057 states. [2020-10-13 10:11:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6057 states to 6057 states and 8433 transitions. [2020-10-13 10:11:17,188 INFO L78 Accepts]: Start accepts. Automaton has 6057 states and 8433 transitions. Word has length 89 [2020-10-13 10:11:17,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:11:17,189 INFO L479 AbstractCegarLoop]: Abstraction has 6057 states and 8433 transitions. [2020-10-13 10:11:17,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:11:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 6057 states and 8433 transitions. [2020-10-13 10:11:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 10:11:17,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:11:17,201 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 10:11:17,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:11:17,202 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:11:17,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:11:17,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1780682459, now seen corresponding path program 1 times [2020-10-13 10:11:17,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:11:17,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485205206] [2020-10-13 10:11:17,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:11:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:17,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:17,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:18,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:18,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 10:11:18,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:11:18,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 788 [2020-10-13 10:11:18,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:18,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:11:18,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-13 10:11:18,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:11:18,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:18,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:11:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:18,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:18,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:18,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:11:18,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:18,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:11:18,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:18,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:11:18,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:11:18,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:18,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:11:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:18,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:18,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:18,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:11:18,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:18,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-13 10:11:18,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:11:18,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:18,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:11:18,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:11:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:11:18,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485205206] [2020-10-13 10:11:18,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:11:18,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:11:18,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691092254] [2020-10-13 10:11:18,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:11:18,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:11:18,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:11:18,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:11:18,391 INFO L87 Difference]: Start difference. First operand 6057 states and 8433 transitions. Second operand 5 states. [2020-10-13 10:11:56,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:11:56,682 INFO L93 Difference]: Finished difference Result 15006 states and 21514 transitions. [2020-10-13 10:11:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:11:56,684 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-10-13 10:11:56,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:11:56,723 INFO L225 Difference]: With dead ends: 15006 [2020-10-13 10:11:56,723 INFO L226 Difference]: Without dead ends: 8955 [2020-10-13 10:11:56,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:11:56,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8955 states. [2020-10-13 10:11:56,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8955 to 8906. [2020-10-13 10:11:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8906 states. [2020-10-13 10:11:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8906 states to 8906 states and 11988 transitions. [2020-10-13 10:11:56,956 INFO L78 Accepts]: Start accepts. Automaton has 8906 states and 11988 transitions. Word has length 90 [2020-10-13 10:11:56,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:11:56,957 INFO L479 AbstractCegarLoop]: Abstraction has 8906 states and 11988 transitions. [2020-10-13 10:11:56,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:11:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 8906 states and 11988 transitions. [2020-10-13 10:11:56,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 10:11:56,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:11:56,965 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 10:11:56,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:11:56,966 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:11:56,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:11:56,966 INFO L82 PathProgramCache]: Analyzing trace with hash -292728196, now seen corresponding path program 1 times [2020-10-13 10:11:56,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:11:56,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474928402] [2020-10-13 10:11:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:11:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:57,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:57,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:57,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:57,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:57,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:58,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:58,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 10:11:58,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:11:58,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1136 [2020-10-13 10:11:58,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:58,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:11:58,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-13 10:11:58,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:11:58,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:11:58,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:11:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:58,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:58,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:58,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:11:58,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:58,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:11:58,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:58,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:11:58,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:58,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:11:58,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:58,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:11:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:58,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:58,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:58,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 10:11:58,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:58,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-13 10:11:58,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:11:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-13 10:11:58,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:11:58,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474928402] [2020-10-13 10:11:58,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:11:58,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:11:58,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480860976] [2020-10-13 10:11:58,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:11:58,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:11:58,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:11:58,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:11:58,557 INFO L87 Difference]: Start difference. First operand 8906 states and 11988 transitions. Second operand 6 states. [2020-10-13 10:12:53,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:12:53,208 INFO L93 Difference]: Finished difference Result 27673 states and 39592 transitions. [2020-10-13 10:12:53,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:12:53,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2020-10-13 10:12:53,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:12:53,286 INFO L225 Difference]: With dead ends: 27673 [2020-10-13 10:12:53,286 INFO L226 Difference]: Without dead ends: 18773 [2020-10-13 10:12:53,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:12:53,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18773 states. [2020-10-13 10:12:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18773 to 18742. [2020-10-13 10:12:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18742 states. [2020-10-13 10:12:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18742 states to 18742 states and 25064 transitions. [2020-10-13 10:12:53,753 INFO L78 Accepts]: Start accepts. Automaton has 18742 states and 25064 transitions. Word has length 101 [2020-10-13 10:12:53,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:12:53,755 INFO L479 AbstractCegarLoop]: Abstraction has 18742 states and 25064 transitions. [2020-10-13 10:12:53,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:12:53,755 INFO L276 IsEmpty]: Start isEmpty. Operand 18742 states and 25064 transitions. [2020-10-13 10:12:53,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 10:12:53,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:12:53,763 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 10:12:53,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:12:53,764 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:12:53,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:12:53,764 INFO L82 PathProgramCache]: Analyzing trace with hash -971937185, now seen corresponding path program 1 times [2020-10-13 10:12:53,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:12:53,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703314643] [2020-10-13 10:12:53,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:12:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:53,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:54,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:54,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:54,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 10:12:54,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:12:54,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 953 [2020-10-13 10:12:54,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:54,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:12:54,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 130 [2020-10-13 10:12:54,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:12:54,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:12:54,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:12:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:54,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:54,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:54,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:12:54,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:12:54,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:12:54,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:54,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:12:54,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:12:54,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:12:54,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:12:54,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:12:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:54,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:55,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:55,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 10:12:55,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:12:55,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-13 10:12:55,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:55,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:12:55,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:12:55,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-13 10:12:55,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:12:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:12:55,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703314643] [2020-10-13 10:12:55,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:12:55,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:12:55,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268194455] [2020-10-13 10:12:55,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:12:55,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:12:55,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:12:55,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:12:55,127 INFO L87 Difference]: Start difference. First operand 18742 states and 25064 transitions. Second operand 6 states. [2020-10-13 10:13:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:13:47,247 INFO L93 Difference]: Finished difference Result 48843 states and 69290 transitions. [2020-10-13 10:13:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:13:47,251 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2020-10-13 10:13:47,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:13:47,364 INFO L225 Difference]: With dead ends: 48843 [2020-10-13 10:13:47,364 INFO L226 Difference]: Without dead ends: 30107 [2020-10-13 10:13:47,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:13:47,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30107 states. [2020-10-13 10:13:47,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30107 to 28601. [2020-10-13 10:13:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28601 states. [2020-10-13 10:13:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28601 states to 28601 states and 41123 transitions. [2020-10-13 10:13:48,009 INFO L78 Accepts]: Start accepts. Automaton has 28601 states and 41123 transitions. Word has length 134 [2020-10-13 10:13:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:13:48,010 INFO L479 AbstractCegarLoop]: Abstraction has 28601 states and 41123 transitions. [2020-10-13 10:13:48,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:13:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 28601 states and 41123 transitions. [2020-10-13 10:13:48,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-13 10:13:48,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:13:48,017 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 10:13:48,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:13:48,018 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:13:48,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:13:48,018 INFO L82 PathProgramCache]: Analyzing trace with hash -613834482, now seen corresponding path program 1 times [2020-10-13 10:13:48,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:13:48,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705304704] [2020-10-13 10:13:48,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:13:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:13:48,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:48,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:49,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:49,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:51,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:13:51,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-10-13 10:13:51,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:13:51,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2946 [2020-10-13 10:13:51,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:13:51,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:13:51,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-13 10:13:51,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:13:51,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:13:51,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:13:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:13:51,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:51,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:13:51,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:13:51,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:13:51,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:13:51,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:13:51,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:13:51,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:13:51,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:13:51,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:13:51,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:13:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:13:51,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:51,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:13:51,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 10:13:51,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:13:51,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-13 10:13:51,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:13:51,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:13:51,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:13:51,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 10:13:51,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:13:51,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-13 10:13:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:13:51,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:51,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:51,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:13:51,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 10:13:51,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:13:51,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-13 10:13:51,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:13:51,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:13:51,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:13:51,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 10:13:51,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:13:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:13:51,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705304704] [2020-10-13 10:13:51,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:13:51,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:13:51,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493566767] [2020-10-13 10:13:51,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:13:51,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:13:51,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:13:51,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:13:51,878 INFO L87 Difference]: Start difference. First operand 28601 states and 41123 transitions. Second operand 7 states.