/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/Problem13_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 12:33:23,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 12:33:23,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 12:33:23,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 12:33:23,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 12:33:23,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 12:33:23,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 12:33:23,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 12:33:23,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 12:33:23,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 12:33:23,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 12:33:23,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 12:33:23,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 12:33:23,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 12:33:23,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 12:33:23,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 12:33:23,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 12:33:23,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 12:33:23,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 12:33:23,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 12:33:23,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 12:33:23,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 12:33:23,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 12:33:23,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 12:33:23,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 12:33:23,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 12:33:23,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 12:33:23,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 12:33:23,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 12:33:23,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 12:33:23,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 12:33:23,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 12:33:23,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 12:33:23,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 12:33:23,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 12:33:23,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 12:33:23,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 12:33:23,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 12:33:23,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 12:33:23,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 12:33:23,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 12:33:23,608 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 [2020-10-28 12:33:23,639 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 12:33:23,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 12:33:23,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 12:33:23,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 12:33:23,643 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 12:33:23,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 12:33:23,644 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 12:33:23,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 12:33:23,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 12:33:23,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 12:33:23,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 12:33:23,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 12:33:23,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 12:33:23,646 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 12:33:23,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 12:33:23,647 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 12:33:23,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 12:33:23,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 12:33:23,647 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 12:33:23,648 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 12:33:23,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 12:33:23,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:33:23,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 12:33:23,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 12:33:23,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 12:33:23,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 12:33:23,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 12:33:23,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 12:33:23,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 12:33:23,650 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 12:33:24,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 12:33:24,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 12:33:24,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 12:33:24,312 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 12:33:24,313 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 12:33:24,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label18.c [2020-10-28 12:33:24,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65f139671/7cd0c5bd4c33498389dd8ec1146fd9d0/FLAG23ac07e65 [2020-10-28 12:33:25,820 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 12:33:25,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label18.c [2020-10-28 12:33:25,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65f139671/7cd0c5bd4c33498389dd8ec1146fd9d0/FLAG23ac07e65 [2020-10-28 12:33:26,184 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65f139671/7cd0c5bd4c33498389dd8ec1146fd9d0 [2020-10-28 12:33:26,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 12:33:26,198 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 12:33:26,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 12:33:26,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 12:33:26,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 12:33:26,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:33:26" (1/1) ... [2020-10-28 12:33:26,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f7a95fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:26, skipping insertion in model container [2020-10-28 12:33:26,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:33:26" (1/1) ... [2020-10-28 12:33:26,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 12:33:26,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 12:33:28,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:33:28,538 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 12:33:29,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:33:29,645 INFO L208 MainTranslator]: Completed translation [2020-10-28 12:33:29,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:29 WrapperNode [2020-10-28 12:33:29,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 12:33:29,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 12:33:29,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 12:33:29,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 12:33:29,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:29" (1/1) ... [2020-10-28 12:33:29,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:29" (1/1) ... [2020-10-28 12:33:29,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:29" (1/1) ... [2020-10-28 12:33:29,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:29" (1/1) ... [2020-10-28 12:33:29,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:29" (1/1) ... [2020-10-28 12:33:30,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:29" (1/1) ... [2020-10-28 12:33:30,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:29" (1/1) ... [2020-10-28 12:33:30,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 12:33:30,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 12:33:30,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 12:33:30,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 12:33:30,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:29" (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 [2020-10-28 12:33:30,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 12:33:30,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 12:33:30,310 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 12:33:30,310 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 12:33:30,310 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 12:33:30,310 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 12:33:30,310 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 12:33:30,311 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 12:33:30,311 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 12:33:30,311 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 12:33:30,311 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 12:33:30,312 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 12:33:30,312 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 12:33:30,312 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 12:33:30,312 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 12:33:30,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 12:33:30,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 12:33:30,446 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 12:33:30,446 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 12:33:30,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 12:33:30,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 12:33:30,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 12:33:30,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 12:33:30,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 12:33:30,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 12:33:41,612 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 12:33:41,612 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 12:33:41,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:33:41 BoogieIcfgContainer [2020-10-28 12:33:41,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 12:33:41,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 12:33:41,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 12:33:41,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 12:33:41,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:33:26" (1/3) ... [2020-10-28 12:33:41,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a486cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:33:41, skipping insertion in model container [2020-10-28 12:33:41,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:33:29" (2/3) ... [2020-10-28 12:33:41,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a486cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:33:41, skipping insertion in model container [2020-10-28 12:33:41,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:33:41" (3/3) ... [2020-10-28 12:33:41,631 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label18.c [2020-10-28 12:33:41,647 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 12:33:41,654 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 12:33:41,669 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 12:33:41,722 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 12:33:41,722 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 12:33:41,722 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 12:33:41,722 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 12:33:41,722 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 12:33:41,722 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 12:33:41,723 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 12:33:41,723 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 12:33:41,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-28 12:33:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 12:33:41,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:33:41,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:33:41,786 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:33:41,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:33:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1716050886, now seen corresponding path program 1 times [2020-10-28 12:33:41,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:33:41,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53744501] [2020-10-28 12:33:41,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:33:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:33:42,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:33:42,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:33:42,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 12:33:42,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:33:42,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 616 [2020-10-28 12:33:42,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:33:42,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:33:42,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:33:42,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:33:42,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 12:33:42,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:33:42,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:33:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:33:42,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:33:42,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:33:42,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:33:42,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:33:42,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 12:33:42,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:33:42,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:33:42,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:33:42,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:33:42,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:33:42,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:33:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:33:43,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53744501] [2020-10-28 12:33:43,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:33:43,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 12:33:43,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498956523] [2020-10-28 12:33:43,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 12:33:43,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:33:43,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 12:33:43,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 12:33:43,036 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-28 12:33:59,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:33:59,733 INFO L93 Difference]: Finished difference Result 3235 states and 5915 transitions. [2020-10-28 12:33:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:33:59,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-28 12:33:59,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:33:59,771 INFO L225 Difference]: With dead ends: 3235 [2020-10-28 12:33:59,772 INFO L226 Difference]: Without dead ends: 2027 [2020-10-28 12:33:59,784 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 [2020-10-28 12:33:59,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2020-10-28 12:33:59,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2010. [2020-10-28 12:33:59,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-28 12:33:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3292 transitions. [2020-10-28 12:33:59,961 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3292 transitions. Word has length 70 [2020-10-28 12:33:59,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:33:59,962 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3292 transitions. [2020-10-28 12:33:59,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 12:33:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3292 transitions. [2020-10-28 12:33:59,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-28 12:33:59,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:33:59,970 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 12:33:59,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 12:33:59,970 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:33:59,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:33:59,971 INFO L82 PathProgramCache]: Analyzing trace with hash -429482830, now seen corresponding path program 1 times [2020-10-28 12:33:59,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:33:59,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576980425] [2020-10-28 12:33:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:34:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:34:00,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:34:00,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:34:01,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:34:03,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:34:03,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-28 12:34:03,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:34:03,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3047 [2020-10-28 12:34:03,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:34:03,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:34:03,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:34:03,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:34:03,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 12:34:03,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 12:34:03,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:34:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:34:03,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:34:03,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:34:03,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:34:03,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:34:03,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 12:34:03,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:34:03,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:34:03,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:34:03,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:34:03,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:34:03,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 12:34:03,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:34:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:34:03,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:34:03,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:34:03,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:34:03,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:34:03,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-28 12:34:03,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:34:03,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:34:03,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:34:03,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:34:03,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 12:34:03,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:34:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:34:03,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576980425] [2020-10-28 12:34:03,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:34:03,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:34:03,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224028018] [2020-10-28 12:34:03,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:34:03,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:34:03,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:34:03,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:34:03,688 INFO L87 Difference]: Start difference. First operand 2010 states and 3292 transitions. Second operand 7 states. [2020-10-28 12:34:26,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:34:26,687 INFO L93 Difference]: Finished difference Result 5854 states and 9672 transitions. [2020-10-28 12:34:26,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:34:26,696 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 145 [2020-10-28 12:34:26,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:34:26,724 INFO L225 Difference]: With dead ends: 5854 [2020-10-28 12:34:26,724 INFO L226 Difference]: Without dead ends: 3850 [2020-10-28 12:34:26,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:34:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2020-10-28 12:34:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3761. [2020-10-28 12:34:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3761 states. [2020-10-28 12:34:26,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3761 states to 3761 states and 5629 transitions. [2020-10-28 12:34:26,867 INFO L78 Accepts]: Start accepts. Automaton has 3761 states and 5629 transitions. Word has length 145 [2020-10-28 12:34:26,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:34:26,868 INFO L481 AbstractCegarLoop]: Abstraction has 3761 states and 5629 transitions. [2020-10-28 12:34:26,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:34:26,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3761 states and 5629 transitions. [2020-10-28 12:34:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-28 12:34:26,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:34:26,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 12:34:26,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 12:34:26,874 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:34:26,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:34:26,875 INFO L82 PathProgramCache]: Analyzing trace with hash -611848074, now seen corresponding path program 1 times [2020-10-28 12:34:26,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:34:26,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884192952] [2020-10-28 12:34:26,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:34:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:34:26,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:34:27,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:34:28,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:34:28,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 12:34:28,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:34:28,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1282 [2020-10-28 12:34:28,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:34:28,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:34:28,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:34:28,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:34:28,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:34:28,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 12:34:28,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:34:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:34:28,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:34:28,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:34:28,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:34:28,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:34:28,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 12:34:28,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:34:28,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:34:28,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:34:28,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:34:28,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:34:28,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:34:28,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:34:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:34:28,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:34:28,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:34:28,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 12:34:28,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:34:28,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-28 12:34:28,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:34:28,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:34:28,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:34:28,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:34:28,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 12:34:28,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:34:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:34:28,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884192952] [2020-10-28 12:34:28,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:34:28,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:34:28,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064101528] [2020-10-28 12:34:28,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:34:28,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:34:28,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:34:28,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:34:28,809 INFO L87 Difference]: Start difference. First operand 3761 states and 5629 transitions. Second operand 7 states. [2020-10-28 12:34:54,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:34:54,804 INFO L93 Difference]: Finished difference Result 11095 states and 17020 transitions. [2020-10-28 12:34:54,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:34:54,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 159 [2020-10-28 12:34:54,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:34:54,857 INFO L225 Difference]: With dead ends: 11095 [2020-10-28 12:34:54,858 INFO L226 Difference]: Without dead ends: 7340 [2020-10-28 12:34:54,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:34:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7340 states. [2020-10-28 12:34:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7340 to 7230. [2020-10-28 12:34:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7230 states. [2020-10-28 12:34:55,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 9869 transitions. [2020-10-28 12:34:55,145 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 9869 transitions. Word has length 159 [2020-10-28 12:34:55,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:34:55,146 INFO L481 AbstractCegarLoop]: Abstraction has 7230 states and 9869 transitions. [2020-10-28 12:34:55,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:34:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 9869 transitions. [2020-10-28 12:34:55,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-28 12:34:55,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:34:55,153 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 12:34:55,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 12:34:55,154 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:34:55,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:34:55,157 INFO L82 PathProgramCache]: Analyzing trace with hash -399347370, now seen corresponding path program 1 times [2020-10-28 12:34:55,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:34:55,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715817793] [2020-10-28 12:34:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:34:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:34:55,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:34:55,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:34:56,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:34:56,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-28 12:34:56,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:34:56,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1355 [2020-10-28 12:34:56,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:34:56,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:34:56,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:34:56,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:34:56,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-28 12:34:56,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:34:56,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:34:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:34:56,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:34:56,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:34:56,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:34:56,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:34:56,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 12:34:56,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:34:56,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:34:56,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:34:56,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:34:56,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:34:56,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:34:56,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:34:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:34:56,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:34:57,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:34:57,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 12:34:57,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:34:57,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-28 12:34:57,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:34:57,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:34:57,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:34:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:34:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 12:34:57,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:34:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:34:57,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715817793] [2020-10-28 12:34:57,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:34:57,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:34:57,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261595158] [2020-10-28 12:34:57,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:34:57,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:34:57,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:34:57,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:34:57,248 INFO L87 Difference]: Start difference. First operand 7230 states and 9869 transitions. Second operand 7 states. [2020-10-28 12:35:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:35:26,072 INFO L93 Difference]: Finished difference Result 21805 states and 30830 transitions. [2020-10-28 12:35:26,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 12:35:26,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 175 [2020-10-28 12:35:26,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:35:26,161 INFO L225 Difference]: With dead ends: 21805 [2020-10-28 12:35:26,161 INFO L226 Difference]: Without dead ends: 14581 [2020-10-28 12:35:26,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:35:26,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14581 states. [2020-10-28 12:35:26,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14581 to 14401. [2020-10-28 12:35:26,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14401 states. [2020-10-28 12:35:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14401 states to 14401 states and 18513 transitions. [2020-10-28 12:35:26,640 INFO L78 Accepts]: Start accepts. Automaton has 14401 states and 18513 transitions. Word has length 175 [2020-10-28 12:35:26,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:35:26,641 INFO L481 AbstractCegarLoop]: Abstraction has 14401 states and 18513 transitions. [2020-10-28 12:35:26,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:35:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand 14401 states and 18513 transitions. [2020-10-28 12:35:26,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-28 12:35:26,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:35:26,649 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:35:26,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 12:35:26,650 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:35:26,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:35:26,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1632364670, now seen corresponding path program 1 times [2020-10-28 12:35:26,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:35:26,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853350436] [2020-10-28 12:35:26,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:35:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:35:26,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:35:26,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:35:27,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:35:31,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:35:31,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 284 [2020-10-28 12:35:31,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:35:31,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 12:35:31,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:35:31,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:35:31,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:35:31,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-28 12:35:31,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 12:35:31,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:35:31,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:35:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:35:31,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:35:31,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:35:31,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:35:31,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:35:31,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 12:35:31,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:35:31,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:35:31,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:35:31,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:35:31,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:35:31,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:35:31,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:35:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:35:32,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:35:32,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:35:32,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 12:35:32,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:35:32,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-28 12:35:32,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:35:32,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:35:32,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:35:32,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:35:32,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 12:35:32,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:35:32,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-28 12:35:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:35:32,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:35:32,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:35:32,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 12:35:32,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:35:32,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-28 12:35:32,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:35:32,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:35:32,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:35:32,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:35:32,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 12:35:32,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:35:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 214 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:35:32,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853350436] [2020-10-28 12:35:32,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:35:32,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:35:32,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66157865] [2020-10-28 12:35:32,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:35:32,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:35:32,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:35:32,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:35:32,641 INFO L87 Difference]: Start difference. First operand 14401 states and 18513 transitions. Second operand 7 states. [2020-10-28 12:35:32,787 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:36:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:36:00,205 INFO L93 Difference]: Finished difference Result 43172 states and 59296 transitions. [2020-10-28 12:36:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:36:00,208 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 270 [2020-10-28 12:36:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:36:00,347 INFO L225 Difference]: With dead ends: 43172 [2020-10-28 12:36:00,347 INFO L226 Difference]: Without dead ends: 28777 [2020-10-28 12:36:00,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:36:00,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28777 states. [2020-10-28 12:36:01,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28777 to 28354. [2020-10-28 12:36:01,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28354 states. [2020-10-28 12:36:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28354 states to 28354 states and 38126 transitions. [2020-10-28 12:36:01,406 INFO L78 Accepts]: Start accepts. Automaton has 28354 states and 38126 transitions. Word has length 270 [2020-10-28 12:36:01,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:36:01,407 INFO L481 AbstractCegarLoop]: Abstraction has 28354 states and 38126 transitions. [2020-10-28 12:36:01,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:36:01,407 INFO L276 IsEmpty]: Start isEmpty. Operand 28354 states and 38126 transitions. [2020-10-28 12:36:01,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-28 12:36:01,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:36:01,416 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:36:01,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 12:36:01,416 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:36:01,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:36:01,417 INFO L82 PathProgramCache]: Analyzing trace with hash -988849555, now seen corresponding path program 1 times [2020-10-28 12:36:01,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:36:01,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970726542] [2020-10-28 12:36:01,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:36:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:36:01,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:01,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:01,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:05,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:06,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:36:06,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-28 12:36:06,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:36:06,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 12:36:06,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:36:06,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:36:06,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:36:06,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:36:06,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 12:36:06,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:36:06,753 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:36:06,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:36:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:36:06,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:06,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:36:06,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:36:06,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:36:06,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 12:36:06,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:36:06,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:36:06,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:36:06,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:36:06,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:36:06,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:36:06,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:36:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:36:06,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:07,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:07,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:36:07,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 12:36:07,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:36:07,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-28 12:36:07,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:36:07,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:36:07,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:36:07,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:36:07,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-28 12:36:07,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:36:07,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-28 12:36:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:36:07,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:07,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:36:07,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 12:36:07,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:36:07,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-28 12:36:07,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:36:07,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:36:07,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:36:07,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-28 12:36:07,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:36:07,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:36:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 124 proven. 84 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 12:36:07,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970726542] [2020-10-28 12:36:07,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:36:07,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:36:07,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925242270] [2020-10-28 12:36:07,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:36:07,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:36:07,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:36:07,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:36:07,738 INFO L87 Difference]: Start difference. First operand 28354 states and 38126 transitions. Second operand 7 states. [2020-10-28 12:36:07,900 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:36:10,617 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-28 12:36:50,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:36:50,337 INFO L93 Difference]: Finished difference Result 65705 states and 89244 transitions. [2020-10-28 12:36:50,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:36:50,359 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 279 [2020-10-28 12:36:50,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:36:50,519 INFO L225 Difference]: With dead ends: 65705 [2020-10-28 12:36:50,519 INFO L226 Difference]: Without dead ends: 37357 [2020-10-28 12:36:50,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:36:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37357 states. [2020-10-28 12:36:51,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37357 to 36965. [2020-10-28 12:36:51,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36965 states. [2020-10-28 12:36:51,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36965 states to 36965 states and 48755 transitions. [2020-10-28 12:36:51,898 INFO L78 Accepts]: Start accepts. Automaton has 36965 states and 48755 transitions. Word has length 279 [2020-10-28 12:36:51,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:36:51,899 INFO L481 AbstractCegarLoop]: Abstraction has 36965 states and 48755 transitions. [2020-10-28 12:36:51,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:36:51,899 INFO L276 IsEmpty]: Start isEmpty. Operand 36965 states and 48755 transitions. [2020-10-28 12:36:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-10-28 12:36:51,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:36:51,906 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:36:51,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 12:36:51,907 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:36:51,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:36:51,908 INFO L82 PathProgramCache]: Analyzing trace with hash 829711753, now seen corresponding path program 1 times [2020-10-28 12:36:51,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:36:51,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883568567] [2020-10-28 12:36:51,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:36:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:36:52,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:52,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:52,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:53,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:55,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:36:55,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 306 [2020-10-28 12:36:55,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:36:55,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3149 [2020-10-28 12:36:55,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:36:55,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:36:55,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:36:55,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-28 12:36:55,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 12:36:55,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:36:55,353 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:36:55,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:36:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:36:55,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:55,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:36:55,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:36:55,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:36:55,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 12:36:55,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:36:55,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:36:55,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:36:55,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:36:55,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:36:55,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:36:55,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:36:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:36:55,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:55,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:36:55,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 12:36:55,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:36:55,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-28 12:36:55,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:36:55,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:36:55,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:36:55,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:36:55,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-28 12:36:55,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:36:55,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-28 12:36:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:36:55,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:36:55,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:36:55,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 12:36:55,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:36:55,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-28 12:36:55,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:36:55,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:36:55,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:36:55,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:36:55,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-28 12:36:55,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:36:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 214 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:36:56,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883568567] [2020-10-28 12:36:56,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:36:56,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:36:56,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459260653] [2020-10-28 12:36:56,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:36:56,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:36:56,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:36:56,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:36:56,136 INFO L87 Difference]: Start difference. First operand 36965 states and 48755 transitions. Second operand 7 states. [2020-10-28 12:36:57,552 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-28 12:36:58,498 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 66