/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:57:31,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:57:31,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:57:31,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:57:31,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:57:31,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:57:31,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:57:31,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:57:31,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:57:31,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:57:31,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:57:31,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:57:31,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:57:31,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:57:31,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:57:31,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:57:31,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:57:31,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:57:31,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:57:31,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:57:31,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:57:31,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:57:31,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:57:31,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:57:31,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:57:31,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:57:31,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:57:31,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:57:31,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:57:31,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:57:31,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:57:31,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:57:31,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:57:31,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:57:31,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:57:31,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:57:31,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:57:31,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:57:31,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:57:31,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:57:31,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:57:31,715 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 [2020-10-29 08:57:31,745 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:57:31,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:57:31,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:57:31,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:57:31,748 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:57:31,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:57:31,749 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:57:31,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:57:31,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:57:31,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:57:31,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:57:31,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:57:31,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:57:31,750 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:57:31,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:57:31,751 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:57:31,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:57:31,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:57:31,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:57:31,752 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:57:31,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:57:31,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:57:31,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:57:31,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:57:31,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:57:31,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:57:31,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:57:31,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:57:31,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:57:31,754 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:57:32,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:57:32,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:57:32,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:57:32,244 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:57:32,245 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:57:32,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label55.c [2020-10-29 08:57:32,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cad1475cf/e8051675616f4064a6861ed06b900538/FLAGdbdea59ef [2020-10-29 08:57:33,760 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:57:33,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label55.c [2020-10-29 08:57:33,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cad1475cf/e8051675616f4064a6861ed06b900538/FLAGdbdea59ef [2020-10-29 08:57:34,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cad1475cf/e8051675616f4064a6861ed06b900538 [2020-10-29 08:57:34,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:57:34,401 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:57:34,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:57:34,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:57:34,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:57:34,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:57:34" (1/1) ... [2020-10-29 08:57:34,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74421ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:34, skipping insertion in model container [2020-10-29 08:57:34,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:57:34" (1/1) ... [2020-10-29 08:57:34,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:57:34,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:57:37,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:57:37,213 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:57:38,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:57:38,723 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:57:38,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:38 WrapperNode [2020-10-29 08:57:38,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:57:38,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:57:38,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:57:38,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:57:38,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:38" (1/1) ... [2020-10-29 08:57:38,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:38" (1/1) ... [2020-10-29 08:57:38,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:38" (1/1) ... [2020-10-29 08:57:38,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:38" (1/1) ... [2020-10-29 08:57:39,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:38" (1/1) ... [2020-10-29 08:57:39,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:38" (1/1) ... [2020-10-29 08:57:39,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:38" (1/1) ... [2020-10-29 08:57:39,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:57:39,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:57:39,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:57:39,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:57:39,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:38" (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 [2020-10-29 08:57:39,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:57:39,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:57:39,731 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:57:39,731 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:57:39,731 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:57:39,731 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:57:39,732 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 08:57:39,732 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-29 08:57:39,732 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-29 08:57:39,732 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:57:39,732 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:57:39,732 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:57:39,733 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:57:39,733 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 08:57:39,733 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-29 08:57:39,733 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-29 08:57:39,733 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:57:39,733 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:57:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:57:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:57:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:57:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:57:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:57:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:57:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:57:39,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:57:39,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:57:39,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:57:39,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:57:56,293 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:57:56,294 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:57:56,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:57:56 BoogieIcfgContainer [2020-10-29 08:57:56,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:57:56,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:57:56,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:57:56,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:57:56,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:57:34" (1/3) ... [2020-10-29 08:57:56,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a41f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:57:56, skipping insertion in model container [2020-10-29 08:57:56,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:38" (2/3) ... [2020-10-29 08:57:56,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a41f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:57:56, skipping insertion in model container [2020-10-29 08:57:56,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:57:56" (3/3) ... [2020-10-29 08:57:56,317 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label55.c [2020-10-29 08:57:56,334 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:57:56,342 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:57:56,361 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:57:56,415 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:57:56,415 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:57:56,415 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:57:56,415 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:57:56,415 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:57:56,415 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:57:56,416 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:57:56,416 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:57:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-29 08:57:56,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 08:57:56,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:57:56,500 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] [2020-10-29 08:57:56,501 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:57:56,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:57:56,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2117600498, now seen corresponding path program 1 times [2020-10-29 08:57:56,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:57:56,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36800664] [2020-10-29 08:57:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:57:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:57:56,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:57,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:57:57,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 08:57:57,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:57:57,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-29 08:57:57,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:57:57,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:57:57,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:57:57,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:57:57,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 08:57:57,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 08:57:57,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:57:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:57:57,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:57,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:57:57,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:57:57,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:57:57,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-29 08:57:57,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:57:57,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:57:57,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:57:57,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:57:57,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:57:57,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:57:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:57:57,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36800664] [2020-10-29 08:57:57,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:57:57,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:57:57,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107079927] [2020-10-29 08:57:57,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:57:57,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:57:57,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:57:57,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:57:57,659 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-29 08:58:36,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:58:36,268 INFO L93 Difference]: Finished difference Result 5062 states and 9524 transitions. [2020-10-29 08:58:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:58:36,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-29 08:58:36,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:58:36,337 INFO L225 Difference]: With dead ends: 5062 [2020-10-29 08:58:36,337 INFO L226 Difference]: Without dead ends: 3201 [2020-10-29 08:58:36,359 INFO L677 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 [2020-10-29 08:58:36,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2020-10-29 08:58:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 3153. [2020-10-29 08:58:36,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3153 states. [2020-10-29 08:58:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 5020 transitions. [2020-10-29 08:58:36,644 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 5020 transitions. Word has length 21 [2020-10-29 08:58:36,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:58:36,645 INFO L481 AbstractCegarLoop]: Abstraction has 3153 states and 5020 transitions. [2020-10-29 08:58:36,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:58:36,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 5020 transitions. [2020-10-29 08:58:36,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-29 08:58:36,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:58:36,651 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 08:58:36,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:58:36,652 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:58:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:58:36,653 INFO L82 PathProgramCache]: Analyzing trace with hash -903930720, now seen corresponding path program 1 times [2020-10-29 08:58:36,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:58:36,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880709476] [2020-10-29 08:58:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:58:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:36,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:36,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:37,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:37,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:39,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:39,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 08:58:39,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:58:39,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2344 [2020-10-29 08:58:39,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:39,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:39,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:58:39,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:58:39,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 08:58:39,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:58:39,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:58:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:39,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:39,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:39,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:58:39,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:58:39,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 08:58:39,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:39,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:39,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:58:39,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:58:39,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:58:39,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:58:39,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:58:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:39,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:39,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:39,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:39,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:58:39,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:58:39,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-29 08:58:39,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:39,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:39,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:58:39,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:58:39,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:58:39,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:58:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:58:39,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880709476] [2020-10-29 08:58:39,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:58:39,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:58:39,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429244608] [2020-10-29 08:58:39,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:58:39,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:58:39,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:58:39,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:58:39,802 INFO L87 Difference]: Start difference. First operand 3153 states and 5020 transitions. Second operand 7 states. [2020-10-29 08:59:37,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:59:37,178 INFO L93 Difference]: Finished difference Result 9571 states and 15238 transitions. [2020-10-29 08:59:37,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:59:37,184 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-10-29 08:59:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:59:37,222 INFO L225 Difference]: With dead ends: 9571 [2020-10-29 08:59:37,223 INFO L226 Difference]: Without dead ends: 6424 [2020-10-29 08:59:37,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:59:37,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6424 states. [2020-10-29 08:59:37,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6424 to 6272. [2020-10-29 08:59:37,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6272 states. [2020-10-29 08:59:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6272 states to 6272 states and 8746 transitions. [2020-10-29 08:59:37,481 INFO L78 Accepts]: Start accepts. Automaton has 6272 states and 8746 transitions. Word has length 92 [2020-10-29 08:59:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:59:37,484 INFO L481 AbstractCegarLoop]: Abstraction has 6272 states and 8746 transitions. [2020-10-29 08:59:37,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:59:37,484 INFO L276 IsEmpty]: Start isEmpty. Operand 6272 states and 8746 transitions. [2020-10-29 08:59:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-29 08:59:37,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:59:37,496 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:59:37,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:59:37,497 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:59:37,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:59:37,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2087448585, now seen corresponding path program 1 times [2020-10-29 08:59:37,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:59:37,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613637808] [2020-10-29 08:59:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:59:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:59:37,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:37,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:37,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:38,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:59:38,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 08:59:38,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:59:38,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-29 08:59:38,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:59:38,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:59:38,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:59:38,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:59:38,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 08:59:38,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:59:38,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:59:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:59:38,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:38,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:59:38,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:59:38,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:59:38,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 08:59:38,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:59:38,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:59:38,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:59:38,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:59:38,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:59:38,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:59:38,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:59:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:59:38,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:38,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:59:38,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 08:59:38,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:59:38,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-29 08:59:38,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:59:38,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:59:38,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:59:38,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:59:38,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 08:59:38,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:59:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:59:39,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613637808] [2020-10-29 08:59:39,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:59:39,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:59:39,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850906876] [2020-10-29 08:59:39,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:59:39,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:59:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:59:39,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:59:39,311 INFO L87 Difference]: Start difference. First operand 6272 states and 8746 transitions. Second operand 7 states. [2020-10-29 09:00:26,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:00:26,009 INFO L93 Difference]: Finished difference Result 18744 states and 26412 transitions. [2020-10-29 09:00:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:00:26,013 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-29 09:00:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:00:26,082 INFO L225 Difference]: With dead ends: 18744 [2020-10-29 09:00:26,082 INFO L226 Difference]: Without dead ends: 12478 [2020-10-29 09:00:26,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:00:26,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12478 states. [2020-10-29 09:00:26,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12478 to 12267. [2020-10-29 09:00:26,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12267 states. [2020-10-29 09:00:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12267 states to 12267 states and 15852 transitions. [2020-10-29 09:00:26,435 INFO L78 Accepts]: Start accepts. Automaton has 12267 states and 15852 transitions. Word has length 94 [2020-10-29 09:00:26,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:00:26,436 INFO L481 AbstractCegarLoop]: Abstraction has 12267 states and 15852 transitions. [2020-10-29 09:00:26,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:00:26,436 INFO L276 IsEmpty]: Start isEmpty. Operand 12267 states and 15852 transitions. [2020-10-29 09:00:26,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-29 09:00:26,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:00:26,438 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:00:26,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:00:26,438 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:00:26,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:00:26,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1206394955, now seen corresponding path program 1 times [2020-10-29 09:00:26,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:00:26,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030381100] [2020-10-29 09:00:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:00:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:00:26,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:00:26,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:00:26,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:00:27,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:00:27,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-29 09:00:27,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:00:27,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-29 09:00:27,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:00:27,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:00:27,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:00:27,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:00:27,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-29 09:00:27,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:00:27,245 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 09:00:27,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:00:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:00:27,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:00:27,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:00:27,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:00:27,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:00:27,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:00:27,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:00:27,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:00:27,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:00:27,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:00:27,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:00:27,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:00:27,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:00:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:00:27,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:00:27,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:00:27,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:00:27,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 09:00:27,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:00:27,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-29 09:00:27,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:00:27,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:00:27,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:00:27,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:00:27,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 09:00:27,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:00:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:00:27,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030381100] [2020-10-29 09:00:27,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:00:27,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:00:27,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032276594] [2020-10-29 09:00:27,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:00:27,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:00:27,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:00:27,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:00:27,705 INFO L87 Difference]: Start difference. First operand 12267 states and 15852 transitions. Second operand 7 states. [2020-10-29 09:00:27,857 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 09:01:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:01:27,756 INFO L93 Difference]: Finished difference Result 30947 states and 41105 transitions. [2020-10-29 09:01:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:01:27,763 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2020-10-29 09:01:27,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:01:27,846 INFO L225 Difference]: With dead ends: 30947 [2020-10-29 09:01:27,847 INFO L226 Difference]: Without dead ends: 18686 [2020-10-29 09:01:27,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:01:27,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18686 states. [2020-10-29 09:01:28,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18686 to 18218. [2020-10-29 09:01:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18218 states. [2020-10-29 09:01:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18218 states to 18218 states and 23373 transitions. [2020-10-29 09:01:28,325 INFO L78 Accepts]: Start accepts. Automaton has 18218 states and 23373 transitions. Word has length 108 [2020-10-29 09:01:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:01:28,326 INFO L481 AbstractCegarLoop]: Abstraction has 18218 states and 23373 transitions. [2020-10-29 09:01:28,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:01:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 18218 states and 23373 transitions. [2020-10-29 09:01:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-29 09:01:28,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:01:28,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:01:28,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:01:28,332 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:01:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:01:28,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1261806498, now seen corresponding path program 1 times [2020-10-29 09:01:28,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:01:28,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745646694] [2020-10-29 09:01:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:01:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:01:28,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:01:28,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:01:30,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:01:30,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-29 09:01:30,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:01:30,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2216 [2020-10-29 09:01:30,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:01:30,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:01:30,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:01:30,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:01:30,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-29 09:01:30,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:01:30,829 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 09:01:30,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:01:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:01:30,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:01:30,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:01:30,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:01:30,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:01:30,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:01:30,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:01:30,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:01:30,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:01:30,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:01:30,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:01:30,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:01:30,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:01:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:01:30,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:01:31,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:01:31,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-29 09:01:31,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:01:31,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-29 09:01:31,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:01:31,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:01:31,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:01:31,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:01:31,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 212 [2020-10-29 09:01:31,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:01:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:01:32,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745646694] [2020-10-29 09:01:32,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:01:32,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:01:32,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030419287] [2020-10-29 09:01:32,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:01:32,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:01:32,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:01:32,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:01:32,170 INFO L87 Difference]: Start difference. First operand 18218 states and 23373 transitions. Second operand 7 states. [2020-10-29 09:01:32,343 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 68