/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=DEEPEST --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_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:18:55,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:18:55,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:18:55,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:18:55,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:18:55,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:18:55,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:18:55,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:18:55,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:18:55,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:18:55,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:18:55,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:18:55,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:18:55,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:18:55,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:18:55,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:18:55,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:18:55,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:18:55,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:18:55,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:18:55,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:18:55,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:18:55,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:18:55,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:18:55,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:18:55,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:18:55,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:18:55,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:18:55,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:18:55,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:18:55,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:18:55,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:18:55,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:18:55,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:18:55,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:18:55,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:18:55,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:18:55,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:18:55,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:18:55,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:18:55,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:18:55,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:18:55,618 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:18:55,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:18:55,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:18:55,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:18:55,623 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:18:55,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:18:55,624 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:18:55,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:18:55,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:18:55,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:18:55,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:18:55,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:18:55,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:18:55,627 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:18:55,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:18:55,627 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:18:55,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:18:55,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:18:55,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:18:55,628 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:18:55,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:18:55,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:18:55,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:18:55,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:18:55,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:18:55,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:18:55,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:18:55,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:18:55,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:18:55,630 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:18:55,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:18:56,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:18:56,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:18:56,027 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:18:56,027 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:18:56,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label07.c [2020-10-27 19:18:56,099 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95e98a1c0/e409a44f632f43f0a688f63f05f67bf3/FLAGcb6bb1010 [2020-10-27 19:18:57,229 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:18:57,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label07.c [2020-10-27 19:18:57,295 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95e98a1c0/e409a44f632f43f0a688f63f05f67bf3/FLAGcb6bb1010 [2020-10-27 19:18:57,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95e98a1c0/e409a44f632f43f0a688f63f05f67bf3 [2020-10-27 19:18:57,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:18:57,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:18:57,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:18:57,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:18:57,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:18:57,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:18:57" (1/1) ... [2020-10-27 19:18:57,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@179a4352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:18:57, skipping insertion in model container [2020-10-27 19:18:57,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:18:57" (1/1) ... [2020-10-27 19:18:57,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:18:57,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:18:59,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:18:59,895 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:19:01,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:19:01,101 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:19:01,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:19:01 WrapperNode [2020-10-27 19:19:01,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:19:01,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:19:01,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:19:01,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:19:01,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:19:01" (1/1) ... [2020-10-27 19:19:01,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:19:01" (1/1) ... [2020-10-27 19:19:01,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:19:01" (1/1) ... [2020-10-27 19:19:01,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:19:01" (1/1) ... [2020-10-27 19:19:01,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:19:01" (1/1) ... [2020-10-27 19:19:01,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:19:01" (1/1) ... [2020-10-27 19:19:01,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:19:01" (1/1) ... [2020-10-27 19:19:01,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:19:01,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:19:01,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:19:01,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:19:01,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:19:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:19:01,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:19:01,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:19:01,895 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:19:01,895 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:19:01,895 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:19:01,896 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 19:19:01,896 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 19:19:01,896 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 19:19:01,896 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 19:19:01,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:19:01,897 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:19:01,897 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:19:01,897 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 19:19:01,897 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 19:19:01,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 19:19:01,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 19:19:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:19:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:19:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:19:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:19:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:19:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:19:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:19:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:19:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:19:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:19:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:19:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:19:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:19:14,982 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:19:14,982 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:19:14,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:19:14 BoogieIcfgContainer [2020-10-27 19:19:14,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:19:14,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:19:14,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:19:14,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:19:14,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:18:57" (1/3) ... [2020-10-27 19:19:14,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4853f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:19:14, skipping insertion in model container [2020-10-27 19:19:14,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:19:01" (2/3) ... [2020-10-27 19:19:14,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4853f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:19:14, skipping insertion in model container [2020-10-27 19:19:14,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:19:14" (3/3) ... [2020-10-27 19:19:15,000 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label07.c [2020-10-27 19:19:15,012 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:19:15,018 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:19:15,028 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:19:15,064 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:19:15,064 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:19:15,065 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:19:15,065 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:19:15,065 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:19:15,065 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:19:15,065 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:19:15,065 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:19:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 19:19:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 19:19:15,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:19:15,123 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] [2020-10-27 19:19:15,123 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:19:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:19:15,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1891861893, now seen corresponding path program 1 times [2020-10-27 19:19:15,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:19:15,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984376222] [2020-10-27 19:19:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:19:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:19:15,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:19:15,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:19:15,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 19:19:15,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:19:15,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 573 [2020-10-27 19:19:15,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:19:15,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:19:15,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:19:15,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 19:19:15,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:19:16,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:19:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:19:16,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:19:16,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:19:16,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:19:16,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:19:16,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 19:19:16,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:19:16,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:19:16,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:19:16,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:19:16,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:19:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:19:16,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984376222] [2020-10-27 19:19:16,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:19:16,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:19:16,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000472822] [2020-10-27 19:19:16,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:19:16,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:19:16,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:19:16,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:19:16,324 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-27 19:19:52,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:19:52,395 INFO L93 Difference]: Finished difference Result 6592 states and 12529 transitions. [2020-10-27 19:19:52,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:19:52,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-27 19:19:52,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:19:52,452 INFO L225 Difference]: With dead ends: 6592 [2020-10-27 19:19:52,453 INFO L226 Difference]: Without dead ends: 4743 [2020-10-27 19:19:52,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:19:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4743 states. [2020-10-27 19:19:52,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4743 to 4622. [2020-10-27 19:19:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4622 states. [2020-10-27 19:19:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4622 states to 4622 states and 8148 transitions. [2020-10-27 19:19:52,768 INFO L78 Accepts]: Start accepts. Automaton has 4622 states and 8148 transitions. Word has length 68 [2020-10-27 19:19:52,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:19:52,771 INFO L481 AbstractCegarLoop]: Abstraction has 4622 states and 8148 transitions. [2020-10-27 19:19:52,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:19:52,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4622 states and 8148 transitions. [2020-10-27 19:19:52,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 19:19:52,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:19:52,791 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:19:52,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:19:52,793 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:19:52,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:19:52,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2022260981, now seen corresponding path program 1 times [2020-10-27 19:19:52,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:19:52,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98582711] [2020-10-27 19:19:52,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:19:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:19:52,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:19:53,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:19:54,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:19:54,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-27 19:19:54,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:19:54,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1264 [2020-10-27 19:19:54,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:19:54,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:19:54,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 19:19:54,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 19:19:54,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:19:54,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:19:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:19:54,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:19:54,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:19:54,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:19:54,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:19:54,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:19:54,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:19:54,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:19:54,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:19:54,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:19:54,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 19:19:54,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:19:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:19:54,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:19:54,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:19:54,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 19:19:54,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:19:54,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 19:19:54,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:19:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:19:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:19:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 19:19:54,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:19:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:19:54,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98582711] [2020-10-27 19:19:54,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:19:54,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:19:54,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603863688] [2020-10-27 19:19:54,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:19:54,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:19:54,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:19:54,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:19:54,680 INFO L87 Difference]: Start difference. First operand 4622 states and 8148 transitions. Second operand 5 states. [2020-10-27 19:20:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:20:32,333 INFO L93 Difference]: Finished difference Result 12106 states and 21855 transitions. [2020-10-27 19:20:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:20:32,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2020-10-27 19:20:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:20:32,384 INFO L225 Difference]: With dead ends: 12106 [2020-10-27 19:20:32,384 INFO L226 Difference]: Without dead ends: 7490 [2020-10-27 19:20:32,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:20:32,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7490 states. [2020-10-27 19:20:32,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7490 to 7455. [2020-10-27 19:20:32,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7455 states. [2020-10-27 19:20:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 11640 transitions. [2020-10-27 19:20:32,641 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 11640 transitions. Word has length 140 [2020-10-27 19:20:32,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:20:32,645 INFO L481 AbstractCegarLoop]: Abstraction has 7455 states and 11640 transitions. [2020-10-27 19:20:32,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:20:32,645 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 11640 transitions. [2020-10-27 19:20:32,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 19:20:32,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:20:32,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:20:32,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:20:32,652 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:20:32,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:20:32,654 INFO L82 PathProgramCache]: Analyzing trace with hash -992571489, now seen corresponding path program 1 times [2020-10-27 19:20:32,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:20:32,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269420112] [2020-10-27 19:20:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:20:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:20:32,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:32,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:33,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:33,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:34,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:34,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:20:34,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 19:20:34,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:20:34,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1758 [2020-10-27 19:20:34,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:20:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:20:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-27 19:20:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 19:20:34,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:20:34,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:20:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:20:34,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:34,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:20:34,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:20:34,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:20:34,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:20:34,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:20:34,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:20:34,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:20:34,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:20:34,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:20:34,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:20:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:20:34,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:20:34,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:20:34,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:20:34,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:20:34,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-27 19:20:34,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:20:34,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:20:34,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:20:34,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 19:20:34,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:20:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:20:34,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269420112] [2020-10-27 19:20:34,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:20:34,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:20:34,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415754449] [2020-10-27 19:20:34,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:20:34,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:20:34,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:20:34,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:20:34,857 INFO L87 Difference]: Start difference. First operand 7455 states and 11640 transitions. Second operand 5 states. [2020-10-27 19:21:15,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:21:15,587 INFO L93 Difference]: Finished difference Result 19146 states and 31200 transitions. [2020-10-27 19:21:15,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:21:15,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-10-27 19:21:15,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:21:15,649 INFO L225 Difference]: With dead ends: 19146 [2020-10-27 19:21:15,649 INFO L226 Difference]: Without dead ends: 11697 [2020-10-27 19:21:15,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:21:15,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11697 states. [2020-10-27 19:21:15,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11697 to 11690. [2020-10-27 19:21:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11690 states. [2020-10-27 19:21:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11690 states to 11690 states and 16752 transitions. [2020-10-27 19:21:16,013 INFO L78 Accepts]: Start accepts. Automaton has 11690 states and 16752 transitions. Word has length 155 [2020-10-27 19:21:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:21:16,013 INFO L481 AbstractCegarLoop]: Abstraction has 11690 states and 16752 transitions. [2020-10-27 19:21:16,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:21:16,014 INFO L276 IsEmpty]: Start isEmpty. Operand 11690 states and 16752 transitions. [2020-10-27 19:21:16,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-27 19:21:16,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:21:16,017 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:21:16,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:21:16,018 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:21:16,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:21:16,019 INFO L82 PathProgramCache]: Analyzing trace with hash 389393378, now seen corresponding path program 1 times [2020-10-27 19:21:16,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:21:16,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872456911] [2020-10-27 19:21:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:21:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:21:16,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:21:16,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:21:17,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:21:17,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 19:21:17,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:21:17,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1233 [2020-10-27 19:21:17,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:21:17,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:21:17,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-27 19:21:17,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 19:21:17,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:21:17,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:21:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:21:17,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:21:17,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:21:17,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:21:17,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:21:17,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:21:17,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:21:17,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:21:17,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:21:17,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:21:17,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:21:17,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:21:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:21:17,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:21:17,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:21:17,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 19:21:17,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:21:17,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-27 19:21:17,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:21:17,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:21:17,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:21:17,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 19:21:17,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:21:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:21:17,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872456911] [2020-10-27 19:21:17,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:21:17,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:21:17,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501659095] [2020-10-27 19:21:17,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:21:17,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:21:17,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:21:17,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:21:17,848 INFO L87 Difference]: Start difference. First operand 11690 states and 16752 transitions. Second operand 6 states. [2020-10-27 19:22:16,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:22:16,897 INFO L93 Difference]: Finished difference Result 33236 states and 51630 transitions. [2020-10-27 19:22:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:22:16,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2020-10-27 19:22:16,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:22:16,987 INFO L225 Difference]: With dead ends: 33236 [2020-10-27 19:22:16,987 INFO L226 Difference]: Without dead ends: 21552 [2020-10-27 19:22:17,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:22:17,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21552 states. [2020-10-27 19:22:17,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21552 to 21545. [2020-10-27 19:22:17,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21545 states. [2020-10-27 19:22:17,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21545 states to 21545 states and 31746 transitions. [2020-10-27 19:22:17,575 INFO L78 Accepts]: Start accepts. Automaton has 21545 states and 31746 transitions. Word has length 158 [2020-10-27 19:22:17,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:22:17,576 INFO L481 AbstractCegarLoop]: Abstraction has 21545 states and 31746 transitions. [2020-10-27 19:22:17,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:22:17,576 INFO L276 IsEmpty]: Start isEmpty. Operand 21545 states and 31746 transitions. [2020-10-27 19:22:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-27 19:22:17,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:22:17,585 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:22:17,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:22:17,585 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:22:17,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:22:17,586 INFO L82 PathProgramCache]: Analyzing trace with hash 185136979, now seen corresponding path program 1 times [2020-10-27 19:22:17,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:22:17,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641070217] [2020-10-27 19:22:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:22:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:22:17,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:22:17,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:22:17,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:22:20,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:22:21,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:22:22,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:22:22,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-27 19:22:22,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:22:22,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 19:22:22,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:22:22,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:22:22,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 179 [2020-10-27 19:22:22,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 19:22:22,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:22:22,887 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:22:22,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:22:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:22:22,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:22:22,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:22:22,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:22:22,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:22:22,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 19:22:22,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:22:22,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:22:22,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:22:22,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:22:22,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:22:22,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:22:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:22:22,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:22:22,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:22:22,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 19:22:22,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:22:22,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 19:22:22,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:22:22,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:22:22,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:22:22,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:22:22,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 19:22:23,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-27 19:22:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:22:23,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:22:23,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:22:23,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 19:22:23,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:22:23,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 19:22:23,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:22:23,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:22:23,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:22:23,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 19:22:23,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:22:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-27 19:22:23,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641070217] [2020-10-27 19:22:23,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:22:23,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:22:23,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307422727] [2020-10-27 19:22:23,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:22:23,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:22:23,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:22:23,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:22:23,221 INFO L87 Difference]: Start difference. First operand 21545 states and 31746 transitions. Second operand 5 states. [2020-10-27 19:22:24,549 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66