/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 04:37:30,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 04:37:30,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 04:37:30,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 04:37:30,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 04:37:30,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 04:37:30,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 04:37:30,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 04:37:30,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 04:37:30,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 04:37:30,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 04:37:30,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 04:37:30,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 04:37:30,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 04:37:30,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 04:37:30,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 04:37:30,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 04:37:30,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 04:37:30,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 04:37:30,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 04:37:30,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 04:37:30,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 04:37:30,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 04:37:30,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 04:37:30,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 04:37:30,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 04:37:30,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 04:37:30,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 04:37:30,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 04:37:30,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 04:37:30,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 04:37:30,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 04:37:30,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 04:37:30,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 04:37:30,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 04:37:30,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 04:37:30,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 04:37:30,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 04:37:30,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 04:37:30,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 04:37:30,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 04:37:30,189 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 [2020-10-14 04:37:30,236 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 04:37:30,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 04:37:30,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 04:37:30,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 04:37:30,242 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 04:37:30,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 04:37:30,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 04:37:30,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 04:37:30,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 04:37:30,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 04:37:30,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 04:37:30,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 04:37:30,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 04:37:30,244 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 04:37:30,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 04:37:30,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 04:37:30,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 04:37:30,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 04:37:30,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 04:37:30,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 04:37:30,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 04:37:30,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 04:37:30,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 04:37:30,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 04:37:30,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 04:37:30,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 04:37:30,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 04:37:30,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 04:37:30,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 04:37:30,248 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 04:37:30,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 04:37:30,712 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 04:37:30,717 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 04:37:30,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 04:37:30,720 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 04:37:30,721 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label44.c [2020-10-14 04:37:30,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/927992a8a/2239ae32471a4219a1898c27d8a2a17c/FLAG4b2dcfa88 [2020-10-14 04:37:31,960 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 04:37:31,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label44.c [2020-10-14 04:37:32,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/927992a8a/2239ae32471a4219a1898c27d8a2a17c/FLAG4b2dcfa88 [2020-10-14 04:37:32,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/927992a8a/2239ae32471a4219a1898c27d8a2a17c [2020-10-14 04:37:32,321 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 04:37:32,323 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 04:37:32,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 04:37:32,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 04:37:32,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 04:37:32,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:37:32" (1/1) ... [2020-10-14 04:37:32,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b599924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:37:32, skipping insertion in model container [2020-10-14 04:37:32,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:37:32" (1/1) ... [2020-10-14 04:37:32,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 04:37:32,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 04:37:35,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:37:35,320 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 04:37:36,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:37:36,633 INFO L208 MainTranslator]: Completed translation [2020-10-14 04:37:36,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:37:36 WrapperNode [2020-10-14 04:37:36,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 04:37:36,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 04:37:36,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 04:37:36,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 04:37:36,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:37:36" (1/1) ... [2020-10-14 04:37:36,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:37:36" (1/1) ... [2020-10-14 04:37:36,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:37:36" (1/1) ... [2020-10-14 04:37:36,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:37:36" (1/1) ... [2020-10-14 04:37:37,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:37:36" (1/1) ... [2020-10-14 04:37:37,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:37:36" (1/1) ... [2020-10-14 04:37:37,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:37:36" (1/1) ... [2020-10-14 04:37:37,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 04:37:37,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 04:37:37,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 04:37:37,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 04:37:37,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:37:36" (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 [2020-10-14 04:37:37,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 04:37:37,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 04:37:37,427 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 04:37:37,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 04:37:37,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-14 04:37:37,429 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-14 04:37:37,429 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-14 04:37:37,429 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-14 04:37:37,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 04:37:37,430 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 04:37:37,430 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 04:37:37,430 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-14 04:37:37,430 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-14 04:37:37,430 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-14 04:37:37,431 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-14 04:37:37,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 04:37:37,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 04:37:37,431 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 04:37:37,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 04:37:37,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 04:37:37,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 04:37:53,126 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 04:37:53,127 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 04:37:53,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:37:53 BoogieIcfgContainer [2020-10-14 04:37:53,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 04:37:53,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 04:37:53,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 04:37:53,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 04:37:53,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 04:37:32" (1/3) ... [2020-10-14 04:37:53,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6dbe49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:37:53, skipping insertion in model container [2020-10-14 04:37:53,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:37:36" (2/3) ... [2020-10-14 04:37:53,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6dbe49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:37:53, skipping insertion in model container [2020-10-14 04:37:53,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:37:53" (3/3) ... [2020-10-14 04:37:53,161 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label44.c [2020-10-14 04:37:53,176 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 04:37:53,189 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 04:37:53,210 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 04:37:53,250 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 04:37:53,250 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 04:37:53,251 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 04:37:53,251 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 04:37:53,251 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 04:37:53,251 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 04:37:53,251 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 04:37:53,252 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 04:37:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-14 04:37:53,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 04:37:53,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:37:53,405 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] [2020-10-14 04:37:53,406 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:37:53,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:37:53,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1535599542, now seen corresponding path program 1 times [2020-10-14 04:37:53,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:37:53,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541030412] [2020-10-14 04:37:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:37:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:37:53,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:37:54,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:37:54,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 04:37:54,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:37:54,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 484 [2020-10-14 04:37:54,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:37:54,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:37:54,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 04:37:54,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:37:54,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 04:37:54,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 04:37:54,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:37:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:37:54,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:37:54,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:37:54,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:37:54,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:37:54,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 04:37:54,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:37:54,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:37:54,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:37:54,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:37:54,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 04:37:54,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:37:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:37:54,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541030412] [2020-10-14 04:37:54,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 04:37:54,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 04:37:54,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629841720] [2020-10-14 04:37:54,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 04:37:54,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:37:54,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 04:37:54,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 04:37:54,414 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-14 04:38:24,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:38:24,241 INFO L93 Difference]: Finished difference Result 5087 states and 9562 transitions. [2020-10-14 04:38:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 04:38:24,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-14 04:38:24,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:38:24,309 INFO L225 Difference]: With dead ends: 5087 [2020-10-14 04:38:24,310 INFO L226 Difference]: Without dead ends: 3246 [2020-10-14 04:38:24,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:38:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2020-10-14 04:38:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 3179. [2020-10-14 04:38:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3179 states. [2020-10-14 04:38:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 5850 transitions. [2020-10-14 04:38:24,682 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 5850 transitions. Word has length 40 [2020-10-14 04:38:24,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:38:24,683 INFO L479 AbstractCegarLoop]: Abstraction has 3179 states and 5850 transitions. [2020-10-14 04:38:24,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 04:38:24,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 5850 transitions. [2020-10-14 04:38:24,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-14 04:38:24,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:38:24,692 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:38:24,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 04:38:24,693 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:38:24,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:38:24,694 INFO L82 PathProgramCache]: Analyzing trace with hash 220681975, now seen corresponding path program 1 times [2020-10-14 04:38:24,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:38:24,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820744237] [2020-10-14 04:38:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:38:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:38:24,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:38:24,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:38:25,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:38:26,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:38:26,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 04:38:26,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 04:38:26,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1538 [2020-10-14 04:38:26,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:38:26,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:38:26,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:38:26,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-14 04:38:26,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 04:38:26,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-14 04:38:26,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:38:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:38:26,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:38:26,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:38:26,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:38:26,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:38:26,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 04:38:26,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:38:26,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:38:26,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:38:26,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:38:26,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:38:26,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-14 04:38:26,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 04:38:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:38:26,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:38:26,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:38:26,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 04:38:26,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:38:26,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-14 04:38:26,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:38:26,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:38:26,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:38:26,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-14 04:38:26,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 04:38:26,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:38:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:38:26,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820744237] [2020-10-14 04:38:26,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 04:38:26,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 04:38:26,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136547958] [2020-10-14 04:38:26,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 04:38:26,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:38:26,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 04:38:26,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:38:26,840 INFO L87 Difference]: Start difference. First operand 3179 states and 5850 transitions. Second operand 5 states. [2020-10-14 04:39:06,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:39:06,993 INFO L93 Difference]: Finished difference Result 9273 states and 17286 transitions. [2020-10-14 04:39:06,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 04:39:06,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-10-14 04:39:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:39:07,057 INFO L225 Difference]: With dead ends: 9273 [2020-10-14 04:39:07,057 INFO L226 Difference]: Without dead ends: 6100 [2020-10-14 04:39:07,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 04:39:07,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6100 states. [2020-10-14 04:39:07,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6100 to 6034. [2020-10-14 04:39:07,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6034 states. [2020-10-14 04:39:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6034 states to 6034 states and 10314 transitions. [2020-10-14 04:39:07,470 INFO L78 Accepts]: Start accepts. Automaton has 6034 states and 10314 transitions. Word has length 111 [2020-10-14 04:39:07,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:39:07,472 INFO L479 AbstractCegarLoop]: Abstraction has 6034 states and 10314 transitions. [2020-10-14 04:39:07,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 04:39:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand 6034 states and 10314 transitions. [2020-10-14 04:39:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 04:39:07,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:39:07,486 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:39:07,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 04:39:07,487 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:39:07,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:39:07,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1111553389, now seen corresponding path program 1 times [2020-10-14 04:39:07,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:39:07,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606836976] [2020-10-14 04:39:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:39:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:39:07,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:39:07,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:39:08,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:39:08,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 04:39:08,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 04:39:08,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-10-14 04:39:08,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:39:08,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:39:08,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 04:39:08,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-14 04:39:08,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 04:39:08,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:39:08,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:39:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:39:08,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:39:08,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:39:08,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:39:08,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:39:08,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 04:39:08,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:39:08,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:39:08,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:39:08,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:39:08,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:39:08,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:39:08,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 04:39:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:39:08,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:39:08,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:39:08,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 04:39:08,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:39:08,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-14 04:39:08,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:39:08,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:39:08,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:39:08,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:39:08,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 04:39:08,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 04:39:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:39:09,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606836976] [2020-10-14 04:39:09,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:39:09,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 04:39:09,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634749627] [2020-10-14 04:39:09,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 04:39:09,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:39:09,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 04:39:09,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:39:09,005 INFO L87 Difference]: Start difference. First operand 6034 states and 10314 transitions. Second operand 5 states. [2020-10-14 04:39:46,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:39:46,114 INFO L93 Difference]: Finished difference Result 16312 states and 27905 transitions. [2020-10-14 04:39:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 04:39:46,117 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2020-10-14 04:39:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:39:46,177 INFO L225 Difference]: With dead ends: 16312 [2020-10-14 04:39:46,177 INFO L226 Difference]: Without dead ends: 10284 [2020-10-14 04:39:46,193 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 [2020-10-14 04:39:46,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10284 states. [2020-10-14 04:39:46,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10284 to 10279. [2020-10-14 04:39:46,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10279 states. [2020-10-14 04:39:46,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10279 states to 10279 states and 15889 transitions. [2020-10-14 04:39:46,500 INFO L78 Accepts]: Start accepts. Automaton has 10279 states and 15889 transitions. Word has length 116 [2020-10-14 04:39:46,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:39:46,503 INFO L479 AbstractCegarLoop]: Abstraction has 10279 states and 15889 transitions. [2020-10-14 04:39:46,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 04:39:46,503 INFO L276 IsEmpty]: Start isEmpty. Operand 10279 states and 15889 transitions. [2020-10-14 04:39:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 04:39:46,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:39:46,513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:39:46,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 04:39:46,514 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:39:46,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:39:46,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1362923979, now seen corresponding path program 1 times [2020-10-14 04:39:46,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:39:46,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902273991] [2020-10-14 04:39:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:39:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:39:46,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:39:46,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:39:47,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:39:48,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:39:48,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-14 04:39:48,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 04:39:48,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1565 [2020-10-14 04:39:48,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:39:48,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:39:48,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 04:39:48,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 112 [2020-10-14 04:39:48,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 04:39:48,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:39:48,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:39:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:39:48,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:39:48,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:39:48,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:39:48,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:39:48,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 04:39:48,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:39:48,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:39:48,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:39:48,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:39:48,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:39:48,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:39:48,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 04:39:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:39:48,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:39:48,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:39:48,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 04:39:48,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:39:48,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-14 04:39:48,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:39:48,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:39:48,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:39:48,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:39:48,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-14 04:39:48,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:39:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:39:48,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902273991] [2020-10-14 04:39:48,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:39:48,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 04:39:48,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807592124] [2020-10-14 04:39:48,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 04:39:48,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:39:48,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 04:39:48,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:39:48,476 INFO L87 Difference]: Start difference. First operand 10279 states and 15889 transitions. Second operand 5 states. [2020-10-14 04:40:30,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:40:30,118 INFO L93 Difference]: Finished difference Result 24785 states and 39190 transitions. [2020-10-14 04:40:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 04:40:30,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-10-14 04:40:30,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:40:30,184 INFO L225 Difference]: With dead ends: 24785 [2020-10-14 04:40:30,185 INFO L226 Difference]: Without dead ends: 14512 [2020-10-14 04:40:30,212 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 [2020-10-14 04:40:30,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14512 states. [2020-10-14 04:40:30,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14512 to 14506. [2020-10-14 04:40:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14506 states. [2020-10-14 04:40:30,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14506 states to 14506 states and 20932 transitions. [2020-10-14 04:40:30,670 INFO L78 Accepts]: Start accepts. Automaton has 14506 states and 20932 transitions. Word has length 142 [2020-10-14 04:40:30,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:40:30,671 INFO L479 AbstractCegarLoop]: Abstraction has 14506 states and 20932 transitions. [2020-10-14 04:40:30,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 04:40:30,671 INFO L276 IsEmpty]: Start isEmpty. Operand 14506 states and 20932 transitions. [2020-10-14 04:40:30,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-14 04:40:30,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:40:30,678 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:40:30,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 04:40:30,678 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:40:30,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:40:30,679 INFO L82 PathProgramCache]: Analyzing trace with hash 5067818, now seen corresponding path program 1 times [2020-10-14 04:40:30,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:40:30,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731427220] [2020-10-14 04:40:30,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:40:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:40:30,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:31,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:31,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:32,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:32,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:40:32,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-14 04:40:32,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 04:40:32,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1495 [2020-10-14 04:40:32,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:40:32,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:40:32,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 04:40:32,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 189 [2020-10-14 04:40:32,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 04:40:32,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:40:32,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:40:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:40:32,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:32,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:40:32,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:40:32,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:40:32,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 04:40:32,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:40:32,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:40:32,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:40:32,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:40:32,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:40:32,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:40:32,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 04:40:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:40:32,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:40:32,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:40:32,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-14 04:40:32,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:40:32,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-14 04:40:32,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:40:32,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:40:32,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:40:32,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:40:32,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-10-14 04:40:32,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:40:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:40:32,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731427220] [2020-10-14 04:40:32,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:40:32,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 04:40:32,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80194372] [2020-10-14 04:40:32,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 04:40:32,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:40:32,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 04:40:32,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:40:32,946 INFO L87 Difference]: Start difference. First operand 14506 states and 20932 transitions. Second operand 5 states.