/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem06_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:40:24,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:40:24,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:40:24,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:40:24,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:40:24,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:40:24,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:40:24,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:40:24,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:40:24,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:40:24,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:40:24,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:40:24,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:40:24,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:40:24,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:40:24,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:40:24,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:40:24,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:40:24,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:40:24,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:40:24,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:40:24,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:40:24,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:40:24,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:40:24,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:40:24,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:40:24,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:40:24,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:40:24,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:40:24,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:40:24,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:40:24,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:40:24,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:40:24,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:40:24,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:40:24,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:40:24,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:40:24,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:40:24,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:40:24,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:40:24,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:40:24,679 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 [2020-10-26 21:40:24,734 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:40:24,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:40:24,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:40:24,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:40:24,740 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:40:24,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:40:24,740 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:40:24,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:40:24,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:40:24,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:40:24,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:40:24,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:40:24,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:40:24,743 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:40:24,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:40:24,743 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:40:24,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:40:24,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:40:24,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:40:24,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:40:24,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:40:24,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:40:24,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:40:24,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:40:24,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:40:24,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:40:24,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:40:24,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:40:24,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:40:24,746 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:40:25,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:40:25,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:40:25,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:40:25,205 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:40:25,205 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:40:25,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label57.c [2020-10-26 21:40:25,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2920ebac/72bd2d5f0479499396bd2ad688eabf7d/FLAGec47a4534 [2020-10-26 21:40:26,442 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:40:26,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label57.c [2020-10-26 21:40:26,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2920ebac/72bd2d5f0479499396bd2ad688eabf7d/FLAGec47a4534 [2020-10-26 21:40:26,745 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2920ebac/72bd2d5f0479499396bd2ad688eabf7d [2020-10-26 21:40:26,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:40:26,755 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:40:26,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:40:26,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:40:26,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:40:26,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:40:26" (1/1) ... [2020-10-26 21:40:26,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a41c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:26, skipping insertion in model container [2020-10-26 21:40:26,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:40:26" (1/1) ... [2020-10-26 21:40:26,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:40:26,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:40:28,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:40:28,979 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:40:30,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:40:30,215 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:40:30,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:30 WrapperNode [2020-10-26 21:40:30,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:40:30,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:40:30,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:40:30,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:40:30,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:30" (1/1) ... [2020-10-26 21:40:30,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:30" (1/1) ... [2020-10-26 21:40:30,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:30" (1/1) ... [2020-10-26 21:40:30,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:30" (1/1) ... [2020-10-26 21:40:30,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:30" (1/1) ... [2020-10-26 21:40:30,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:30" (1/1) ... [2020-10-26 21:40:30,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:30" (1/1) ... [2020-10-26 21:40:30,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:40:30,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:40:30,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:40:30,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:40:30,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:30" (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 [2020-10-26 21:40:31,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:40:31,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:40:31,062 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:40:31,063 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:40:31,063 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:40:31,063 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:40:31,064 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:40:31,064 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:40:31,064 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:40:31,064 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:40:31,065 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:40:31,066 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:40:31,066 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:40:31,067 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:40:31,067 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:40:31,068 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:40:31,068 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:40:31,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:40:31,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:40:31,069 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:40:31,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:40:31,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:40:31,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:40:31,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:40:31,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:40:31,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:40:31,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:40:38,869 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:40:38,869 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:40:38,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:40:38 BoogieIcfgContainer [2020-10-26 21:40:38,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:40:38,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:40:38,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:40:38,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:40:38,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:40:26" (1/3) ... [2020-10-26 21:40:38,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2c06bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:40:38, skipping insertion in model container [2020-10-26 21:40:38,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:40:30" (2/3) ... [2020-10-26 21:40:38,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2c06bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:40:38, skipping insertion in model container [2020-10-26 21:40:38,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:40:38" (3/3) ... [2020-10-26 21:40:38,886 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label57.c [2020-10-26 21:40:38,899 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:40:38,905 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:40:38,919 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:40:38,966 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:40:38,966 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:40:38,967 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:40:38,967 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:40:38,967 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:40:38,967 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:40:38,967 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:40:38,967 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:40:39,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:40:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 989 [2020-10-26 21:40:39,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:40:39,120 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:40:39,121 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:40:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:40:39,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1840024648, now seen corresponding path program 1 times [2020-10-26 21:40:39,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:40:39,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546511016] [2020-10-26 21:40:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:40:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:40:41,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:43,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:45,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:40:45,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1006 [2020-10-26 21:40:45,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:40:45,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5209 [2020-10-26 21:40:45,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:40:45,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 21:40:45,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:40:45,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-26 21:40:45,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 21:40:49,730 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:40:50,032 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:40:50,331 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:40:50,619 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-26 21:40:50,873 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 21:40:51,143 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 21:40:51,408 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 21:40:51,627 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 21:40:51,868 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-26 21:40:52,081 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-26 21:40:52,239 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-26 21:40:52,398 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-26 21:40:52,556 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-26 21:40:52,986 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:40:52,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:40:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:40:53,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:53,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:40:53,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:40:53,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:40:53,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 21:40:53,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:40:53,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:40:53,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:40:53,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:40:53,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:41:05,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546511016] [2020-10-26 21:41:05,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:41:05,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 21:41:05,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740908881] [2020-10-26 21:41:05,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:41:05,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:41:05,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:41:05,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:41:05,110 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-26 21:41:05,653 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-26 21:41:06,631 WARN L193 SmtUtils]: Spent 885.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 21:41:07,635 WARN L193 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 21:41:08,707 WARN L193 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 204 [2020-10-26 21:41:13,174 WARN L193 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 203 [2020-10-26 21:41:17,168 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 215 DAG size of output: 202 [2020-10-26 21:41:20,093 WARN L193 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 193 [2020-10-26 21:41:21,158 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 199 [2020-10-26 21:41:22,495 WARN L193 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 198 [2020-10-26 21:41:32,888 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 192 [2020-10-26 21:41:33,953 WARN L193 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 197 [2020-10-26 21:41:37,497 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 202 DAG size of output: 196 [2020-10-26 21:41:46,265 WARN L193 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 190 [2020-10-26 21:41:47,325 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 194 [2020-10-26 21:41:50,315 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 207 DAG size of output: 193 [2020-10-26 21:42:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:42:03,676 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-26 21:42:03,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 21:42:03,678 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 988 [2020-10-26 21:42:03,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:42:03,738 INFO L225 Difference]: With dead ends: 3401 [2020-10-26 21:42:03,739 INFO L226 Difference]: Without dead ends: 2020 [2020-10-26 21:42:03,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:42:03,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-26 21:42:03,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-26 21:42:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-26 21:42:03,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-26 21:42:03,947 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 988 [2020-10-26 21:42:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:42:03,953 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-26 21:42:03,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:42:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-26 21:42:04,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1059 [2020-10-26 21:42:04,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:42:04,018 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:42:04,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:42:04,018 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:42:04,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:42:04,020 INFO L82 PathProgramCache]: Analyzing trace with hash -959811583, now seen corresponding path program 1 times [2020-10-26 21:42:04,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:42:04,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496966073] [2020-10-26 21:42:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:42:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:04,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:06,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:09,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:09,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1078 [2020-10-26 21:42:09,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:42:09,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5142 [2020-10-26 21:42:09,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:09,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:42:09,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:42:09,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:42:09,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:42:09,918 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:42:09,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:42:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:09,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:09,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:09,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:42:09,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:42:09,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 21:42:09,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:09,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:42:09,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:42:09,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:42:09,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:42:10,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:42:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:10,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:10,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:10,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 21:42:10,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:42:10,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-26 21:42:10,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:10,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:42:10,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:42:10,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 21:42:10,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:42:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:42:11,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496966073] [2020-10-26 21:42:11,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:42:11,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:42:11,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305847909] [2020-10-26 21:42:11,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:42:11,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:42:11,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:42:11,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:42:11,426 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 7 states. [2020-10-26 21:42:11,764 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 21:42:13,359 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-26 21:42:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:42:37,145 INFO L93 Difference]: Finished difference Result 4492 states and 7531 transitions. [2020-10-26 21:42:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:42:37,146 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1058 [2020-10-26 21:42:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:42:37,166 INFO L225 Difference]: With dead ends: 4492 [2020-10-26 21:42:37,166 INFO L226 Difference]: Without dead ends: 3232 [2020-10-26 21:42:37,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:42:37,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2020-10-26 21:42:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3164. [2020-10-26 21:42:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3164 states. [2020-10-26 21:42:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 4675 transitions. [2020-10-26 21:42:37,283 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 4675 transitions. Word has length 1058 [2020-10-26 21:42:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:42:37,284 INFO L481 AbstractCegarLoop]: Abstraction has 3164 states and 4675 transitions. [2020-10-26 21:42:37,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:42:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 4675 transitions. [2020-10-26 21:42:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1111 [2020-10-26 21:42:37,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:42:37,304 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:42:37,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:42:37,305 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:42:37,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:42:37,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1317458556, now seen corresponding path program 1 times [2020-10-26 21:42:37,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:42:37,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001541185] [2020-10-26 21:42:37,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:42:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:38,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:38,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:43,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:43,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1130 [2020-10-26 21:42:43,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:42:43,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5256 [2020-10-26 21:42:43,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:43,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 21:42:43,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:42:43,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 552 [2020-10-26 21:42:43,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:42:47,135 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-26 21:42:47,313 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-26 21:42:47,614 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-26 21:42:47,910 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-10-26 21:42:48,285 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 55 [2020-10-26 21:42:48,638 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 68 [2020-10-26 21:42:49,036 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 68 [2020-10-26 21:42:49,556 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 72 [2020-10-26 21:42:50,043 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 67 [2020-10-26 21:42:50,544 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 67 [2020-10-26 21:42:50,828 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:42:50,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:42:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:50,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:50,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:50,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:42:50,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:42:50,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 21:42:50,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:50,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:42:50,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:42:50,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:42:50,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:42:51,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:42:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:51,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:51,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:51,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:42:51,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:42:51,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-10-26 21:42:51,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:51,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 21:42:51,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:42:51,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:42:51,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:43:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:43:01,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001541185] [2020-10-26 21:43:01,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:43:01,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 21:43:01,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644376129] [2020-10-26 21:43:01,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:43:01,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:43:01,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:43:01,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:43:01,157 INFO L87 Difference]: Start difference. First operand 3164 states and 4675 transitions. Second operand 18 states. [2020-10-26 21:43:01,629 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-26 21:43:03,905 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2020-10-26 21:43:04,213 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-26 21:43:04,582 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-10-26 21:43:05,582 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 196 [2020-10-26 21:43:06,645 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 215 DAG size of output: 205 [2020-10-26 21:43:08,248 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 216 DAG size of output: 203 [2020-10-26 21:43:11,817 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 224 DAG size of output: 204 [2020-10-26 21:43:14,514 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-26 21:43:17,493 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 176 [2020-10-26 21:43:24,217 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 232 DAG size of output: 200 [2020-10-26 21:43:25,688 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 243 DAG size of output: 211 [2020-10-26 21:43:28,099 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 243 DAG size of output: 208 [2020-10-26 21:43:41,259 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 245 DAG size of output: 203 [2020-10-26 21:43:43,139 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 250 DAG size of output: 203