/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SHALLOWEST --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 language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:53:17,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:53:17,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:53:17,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:53:17,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:53:17,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:53:17,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:53:17,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:53:17,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:53:17,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:53:17,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:53:17,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:53:17,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:53:17,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:53:17,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:53:17,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:53:17,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:53:17,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:53:17,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:53:17,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:53:17,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:53:17,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:53:17,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:53:17,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:53:17,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:53:17,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:53:17,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:53:17,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:53:17,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:53:17,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:53:17,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:53:17,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:53:17,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:53:17,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:53:17,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:53:17,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:53:17,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:53:17,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:53:17,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:53:17,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:53:17,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:53:17,708 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 [2020-10-27 00:53:17,737 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:53:17,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:53:17,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:53:17,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:53:17,739 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:53:17,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:53:17,740 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:53:17,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:53:17,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:53:17,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:53:17,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:53:17,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:53:17,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:53:17,741 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:53:17,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:53:17,742 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:53:17,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:53:17,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:53:17,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:53:17,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:53:17,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:53:17,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:53:17,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:53:17,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:53:17,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:53:17,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:53:17,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:53:17,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:53:17,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:53:17,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:53:18,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:53:18,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:53:18,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:53:18,214 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:53:18,215 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:53:18,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label56.c [2020-10-27 00:53:18,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da605c365/fc7114dd0ff444fcb01a2f91d7e8a9e0/FLAGaf73c7163 [2020-10-27 00:53:19,521 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:53:19,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label56.c [2020-10-27 00:53:19,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da605c365/fc7114dd0ff444fcb01a2f91d7e8a9e0/FLAGaf73c7163 [2020-10-27 00:53:19,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da605c365/fc7114dd0ff444fcb01a2f91d7e8a9e0 [2020-10-27 00:53:19,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:53:19,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:53:19,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:53:19,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:53:19,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:53:19,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:53:19" (1/1) ... [2020-10-27 00:53:19,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5106077e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:53:19, skipping insertion in model container [2020-10-27 00:53:19,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:53:19" (1/1) ... [2020-10-27 00:53:19,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:53:20,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:53:22,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:53:22,302 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:53:23,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:53:23,535 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:53:23,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:53:23 WrapperNode [2020-10-27 00:53:23,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:53:23,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:53:23,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:53:23,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:53:23,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:53:23" (1/1) ... [2020-10-27 00:53:23,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:53:23" (1/1) ... [2020-10-27 00:53:23,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:53:23" (1/1) ... [2020-10-27 00:53:23,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:53:23" (1/1) ... [2020-10-27 00:53:23,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:53:23" (1/1) ... [2020-10-27 00:53:24,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:53:23" (1/1) ... [2020-10-27 00:53:24,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:53:23" (1/1) ... [2020-10-27 00:53:24,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:53:24,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:53:24,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:53:24,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:53:24,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:53:23" (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 [2020-10-27 00:53:24,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:53:24,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:53:24,224 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:53:24,224 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:53:24,225 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:53:24,225 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:53:24,225 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:53:24,225 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:53:24,225 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:53:24,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:53:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:53:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:53:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:53:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:53:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:53:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:53:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:53:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:53:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:53:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:53:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:53:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:53:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:53:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:53:24,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:53:24,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:53:24,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:53:24,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:53:24,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:53:40,560 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:53:40,562 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:53:40,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:53:40 BoogieIcfgContainer [2020-10-27 00:53:40,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:53:40,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:53:40,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:53:40,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:53:40,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:53:19" (1/3) ... [2020-10-27 00:53:40,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7ac88e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:53:40, skipping insertion in model container [2020-10-27 00:53:40,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:53:23" (2/3) ... [2020-10-27 00:53:40,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7ac88e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:53:40, skipping insertion in model container [2020-10-27 00:53:40,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:53:40" (3/3) ... [2020-10-27 00:53:40,580 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label56.c [2020-10-27 00:53:40,593 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:53:40,600 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:53:40,614 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:53:40,652 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:53:40,653 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:53:40,653 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:53:40,653 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:53:40,653 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:53:40,653 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:53:40,654 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:53:40,654 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:53:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:53:40,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 00:53:40,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:53:40,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:53:40,714 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:53:40,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:53:40,720 INFO L82 PathProgramCache]: Analyzing trace with hash -511309379, now seen corresponding path program 1 times [2020-10-27 00:53:40,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:53:40,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168403096] [2020-10-27 00:53:40,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:53:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:41,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:41,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:41,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 00:53:41,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:53:41,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-27 00:53:41,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:41,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:53:41,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:53:41,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 00:53:41,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:53:41,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:53:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:41,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:41,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:41,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:53:41,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:53:41,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 00:53:41,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:41,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:53:41,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:53:41,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:53:41,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:53:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:53:41,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168403096] [2020-10-27 00:53:41,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:53:41,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:53:41,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751060665] [2020-10-27 00:53:41,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:53:41,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:53:41,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:53:41,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:53:41,995 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 00:53:42,179 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:54:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:54:05,928 INFO L93 Difference]: Finished difference Result 5100 states and 9572 transitions. [2020-10-27 00:54:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:54:05,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-27 00:54:05,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:54:05,990 INFO L225 Difference]: With dead ends: 5100 [2020-10-27 00:54:05,990 INFO L226 Difference]: Without dead ends: 3255 [2020-10-27 00:54:06,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:54:06,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-10-27 00:54:06,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3209. [2020-10-27 00:54:06,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3209 states. [2020-10-27 00:54:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5178 transitions. [2020-10-27 00:54:06,232 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5178 transitions. Word has length 58 [2020-10-27 00:54:06,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:54:06,237 INFO L481 AbstractCegarLoop]: Abstraction has 3209 states and 5178 transitions. [2020-10-27 00:54:06,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:54:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5178 transitions. [2020-10-27 00:54:06,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 00:54:06,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:54:06,255 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:54:06,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:54:06,255 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:54:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:54:06,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1696698548, now seen corresponding path program 1 times [2020-10-27 00:54:06,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:54:06,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369952434] [2020-10-27 00:54:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:54:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:06,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:06,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:07,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:08,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:08,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 00:54:08,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:54:08,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1706 [2020-10-27 00:54:08,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:08,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:54:08,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:54:08,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-27 00:54:08,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:54:08,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:54:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:08,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:08,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:08,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:54:08,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:54:08,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 00:54:08,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:08,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:54:08,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:54:08,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:54:08,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:08,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:54:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:08,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:08,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:08,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:08,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:54:08,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:54:08,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-27 00:54:08,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:08,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:54:08,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:54:08,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:54:08,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:54:08,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369952434] [2020-10-27 00:54:08,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:54:08,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:54:08,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109453235] [2020-10-27 00:54:08,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:54:08,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:54:08,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:54:08,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:54:08,837 INFO L87 Difference]: Start difference. First operand 3209 states and 5178 transitions. Second operand 7 states. [2020-10-27 00:54:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:54:40,014 INFO L93 Difference]: Finished difference Result 9466 states and 15408 transitions. [2020-10-27 00:54:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:54:40,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 133 [2020-10-27 00:54:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:54:40,057 INFO L225 Difference]: With dead ends: 9466 [2020-10-27 00:54:40,057 INFO L226 Difference]: Without dead ends: 6263 [2020-10-27 00:54:40,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:54:40,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6263 states. [2020-10-27 00:54:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6263 to 6135. [2020-10-27 00:54:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6135 states. [2020-10-27 00:54:40,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6135 states to 6135 states and 8970 transitions. [2020-10-27 00:54:40,280 INFO L78 Accepts]: Start accepts. Automaton has 6135 states and 8970 transitions. Word has length 133 [2020-10-27 00:54:40,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:54:40,283 INFO L481 AbstractCegarLoop]: Abstraction has 6135 states and 8970 transitions. [2020-10-27 00:54:40,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:54:40,283 INFO L276 IsEmpty]: Start isEmpty. Operand 6135 states and 8970 transitions. [2020-10-27 00:54:40,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 00:54:40,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:54:40,289 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:54:40,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:54:40,289 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:54:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:54:40,293 INFO L82 PathProgramCache]: Analyzing trace with hash -316225934, now seen corresponding path program 1 times [2020-10-27 00:54:40,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:54:40,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401148304] [2020-10-27 00:54:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:54:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:40,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:40,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:41,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:42,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:42,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 00:54:42,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:54:42,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2182 [2020-10-27 00:54:42,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:42,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:54:42,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:54:42,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 00:54:42,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:42,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:54:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:42,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:42,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:42,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:54:42,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:54:42,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 00:54:42,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:42,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:54:42,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:54:42,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:54:42,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:42,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:54:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:42,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:42,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:42,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 00:54:42,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:54:42,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-27 00:54:42,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:42,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:54:42,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:54:42,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 00:54:42,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:54:43,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401148304] [2020-10-27 00:54:43,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:54:43,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:54:43,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237845497] [2020-10-27 00:54:43,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:54:43,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:54:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:54:43,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:54:43,079 INFO L87 Difference]: Start difference. First operand 6135 states and 8970 transitions. Second operand 7 states. [2020-10-27 00:55:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:55:23,588 INFO L93 Difference]: Finished difference Result 18589 states and 27879 transitions. [2020-10-27 00:55:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:55:23,590 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 159 [2020-10-27 00:55:23,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:55:23,662 INFO L225 Difference]: With dead ends: 18589 [2020-10-27 00:55:23,662 INFO L226 Difference]: Without dead ends: 12460 [2020-10-27 00:55:23,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:55:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12460 states. [2020-10-27 00:55:24,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12460 to 12231. [2020-10-27 00:55:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12231 states. [2020-10-27 00:55:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12231 states to 12231 states and 16237 transitions. [2020-10-27 00:55:24,050 INFO L78 Accepts]: Start accepts. Automaton has 12231 states and 16237 transitions. Word has length 159 [2020-10-27 00:55:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:55:24,056 INFO L481 AbstractCegarLoop]: Abstraction has 12231 states and 16237 transitions. [2020-10-27 00:55:24,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:55:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 12231 states and 16237 transitions. [2020-10-27 00:55:24,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 00:55:24,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:55:24,059 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:55:24,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:55:24,061 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:55:24,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:55:24,061 INFO L82 PathProgramCache]: Analyzing trace with hash 13618790, now seen corresponding path program 1 times [2020-10-27 00:55:24,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:55:24,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726049932] [2020-10-27 00:55:24,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:55:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:55:24,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:24,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:24,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:24,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:26,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:55:26,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 00:55:26,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:55:26,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1968 [2020-10-27 00:55:26,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:55:26,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:55:26,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:55:26,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-27 00:55:26,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:55:26,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:55:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:55:26,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:26,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:55:26,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:55:26,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:55:26,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:55:26,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:55:26,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:55:26,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:55:26,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:55:26,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:55:26,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:55:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:55:26,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:26,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:26,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:26,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:55:26,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 00:55:26,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:55:26,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-27 00:55:26,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:55:26,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:55:26,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:55:26,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 00:55:26,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:55:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:55:26,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726049932] [2020-10-27 00:55:26,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:55:26,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:55:26,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492710787] [2020-10-27 00:55:26,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:55:26,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:55:26,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:55:26,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:55:26,878 INFO L87 Difference]: Start difference. First operand 12231 states and 16237 transitions. Second operand 7 states. [2020-10-27 00:56:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:56:23,575 INFO L93 Difference]: Finished difference Result 36849 states and 50161 transitions. [2020-10-27 00:56:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:56:23,582 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 181 [2020-10-27 00:56:23,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:56:23,664 INFO L225 Difference]: With dead ends: 36849 [2020-10-27 00:56:23,664 INFO L226 Difference]: Without dead ends: 24624 [2020-10-27 00:56:23,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:56:23,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24624 states. [2020-10-27 00:56:24,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24624 to 24246. [2020-10-27 00:56:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24246 states. [2020-10-27 00:56:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24246 states to 24246 states and 30294 transitions. [2020-10-27 00:56:24,265 INFO L78 Accepts]: Start accepts. Automaton has 24246 states and 30294 transitions. Word has length 181 [2020-10-27 00:56:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:56:24,267 INFO L481 AbstractCegarLoop]: Abstraction has 24246 states and 30294 transitions. [2020-10-27 00:56:24,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:56:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 24246 states and 30294 transitions. [2020-10-27 00:56:24,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-27 00:56:24,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:56:24,273 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2020-10-27 00:56:24,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:56:24,273 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:56:24,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:56:24,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1370533044, now seen corresponding path program 1 times [2020-10-27 00:56:24,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:56:24,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973268036] [2020-10-27 00:56:24,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:56:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:56:24,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:56:24,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:56:24,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:56:26,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:56:27,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:56:29,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:56:29,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-27 00:56:29,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:56:29,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-27 00:56:29,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:56:29,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:56:29,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:56:29,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-27 00:56:29,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:56:29,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:56:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:56:29,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:56:29,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:56:29,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:56:29,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:56:29,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:56:29,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:56:29,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:56:29,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:56:29,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:56:29,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:56:29,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:56:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:56:29,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:56:29,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:56:29,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 00:56:29,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:56:29,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-27 00:56:29,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:56:29,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:56:29,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:56:29,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-27 00:56:29,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:56:29,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-27 00:56:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:56:29,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:56:29,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:56:29,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 00:56:29,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:56:29,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 00:56:29,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:56:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:56:29,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-27 00:56:29,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:56:29,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:56:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 100 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:56:30,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973268036] [2020-10-27 00:56:30,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:56:30,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:56:30,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308900234] [2020-10-27 00:56:30,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:56:30,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:56:30,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:56:30,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:56:30,002 INFO L87 Difference]: Start difference. First operand 24246 states and 30294 transitions. Second operand 7 states.