/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_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:30:36,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:30:36,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:30:36,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:30:36,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:30:36,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:30:36,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:30:36,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:30:36,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:30:36,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:30:36,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:30:36,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:30:36,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:30:36,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:30:36,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:30:36,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:30:36,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:30:36,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:30:36,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:30:36,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:30:36,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:30:36,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:30:36,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:30:36,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:30:36,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:30:37,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:30:37,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:30:37,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:30:37,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:30:37,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:30:37,021 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:30:37,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:30:37,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:30:37,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:30:37,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:30:37,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:30:37,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:30:37,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:30:37,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:30:37,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:30:37,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:30:37,061 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 19:30:37,139 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:30:37,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:30:37,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:30:37,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:30:37,150 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:30:37,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:30:37,151 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:30:37,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:30:37,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:30:37,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:30:37,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:30:37,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:30:37,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:30:37,154 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:30:37,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:30:37,155 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:30:37,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:30:37,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:30:37,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:30:37,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:30:37,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:30:37,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:30:37,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:30:37,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:30:37,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:30:37,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:30:37,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:30:37,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:30:37,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:30:37,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:30:37,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:30:37,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:30:37,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:30:37,801 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:30:37,803 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:30:37,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label42.c [2020-10-27 19:30:37,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/173ebb936/f186934c3cd341cf90c881e066ee9ad9/FLAG9b7a0be15 [2020-10-27 19:30:39,254 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:30:39,255 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label42.c [2020-10-27 19:30:39,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/173ebb936/f186934c3cd341cf90c881e066ee9ad9/FLAG9b7a0be15 [2020-10-27 19:30:39,478 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/173ebb936/f186934c3cd341cf90c881e066ee9ad9 [2020-10-27 19:30:39,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:30:39,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:30:39,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:30:39,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:30:39,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:30:39,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:30:39" (1/1) ... [2020-10-27 19:30:39,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe8493e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:39, skipping insertion in model container [2020-10-27 19:30:39,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:30:39" (1/1) ... [2020-10-27 19:30:39,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:30:39,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:30:42,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:30:42,637 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:30:43,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:30:43,999 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:30:44,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:44 WrapperNode [2020-10-27 19:30:44,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:30:44,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:30:44,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:30:44,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:30:44,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:44" (1/1) ... [2020-10-27 19:30:44,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:44" (1/1) ... [2020-10-27 19:30:44,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:44" (1/1) ... [2020-10-27 19:30:44,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:44" (1/1) ... [2020-10-27 19:30:44,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:44" (1/1) ... [2020-10-27 19:30:44,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:44" (1/1) ... [2020-10-27 19:30:44,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:44" (1/1) ... [2020-10-27 19:30:44,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:30:44,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:30:44,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:30:44,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:30:44,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:44" (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 19:30:44,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:30:44,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:30:44,930 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:30:44,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:30:44,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:30:44,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 19:30:44,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 19:30:44,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 19:30:44,932 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 19:30:44,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:30:44,933 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:30:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:30:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 19:30:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 19:30:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 19:30:44,936 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 19:30:44,937 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:30:44,937 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:30:44,937 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:30:44,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:30:44,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:30:44,938 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:30:44,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:30:44,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:30:44,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:30:44,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:30:44,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:30:44,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:30:44,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:31:04,480 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:31:04,481 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:31:04,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:31:04 BoogieIcfgContainer [2020-10-27 19:31:04,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:31:04,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:31:04,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:31:04,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:31:04,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:30:39" (1/3) ... [2020-10-27 19:31:04,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fef8493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:31:04, skipping insertion in model container [2020-10-27 19:31:04,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:30:44" (2/3) ... [2020-10-27 19:31:04,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fef8493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:31:04, skipping insertion in model container [2020-10-27 19:31:04,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:31:04" (3/3) ... [2020-10-27 19:31:04,506 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label42.c [2020-10-27 19:31:04,523 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:31:04,532 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:31:04,551 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:31:04,604 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:31:04,605 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:31:04,605 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:31:04,605 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:31:04,605 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:31:04,605 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:31:04,606 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:31:04,606 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:31:04,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 19:31:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:31:04,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:31:04,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:31:04,676 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:31:04,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:31:04,686 INFO L82 PathProgramCache]: Analyzing trace with hash -302746763, now seen corresponding path program 1 times [2020-10-27 19:31:04,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:31:04,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131904138] [2020-10-27 19:31:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:31:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:05,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:05,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:05,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 19:31:05,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:31:05,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-27 19:31:05,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:05,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:31:05,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:31:05,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:31:05,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 19:31:05,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:31:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:05,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:05,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:05,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:31:05,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:31:05,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 19:31:05,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:05,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:31:05,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:31:05,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:31:05,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:31:05,916 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 19:31:05,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131904138] [2020-10-27 19:31:05,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:31:05,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:31:05,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201424004] [2020-10-27 19:31:05,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:31:05,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:31:05,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:31:05,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:31:05,957 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-27 19:31:06,302 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:31:49,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:31:49,292 INFO L93 Difference]: Finished difference Result 6592 states and 12529 transitions. [2020-10-27 19:31:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:31:49,295 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 19:31:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:31:49,353 INFO L225 Difference]: With dead ends: 6592 [2020-10-27 19:31:49,353 INFO L226 Difference]: Without dead ends: 4743 [2020-10-27 19:31:49,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:31:49,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4743 states. [2020-10-27 19:31:49,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4743 to 4622. [2020-10-27 19:31:49,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4622 states. [2020-10-27 19:31:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4622 states to 4622 states and 8148 transitions. [2020-10-27 19:31:49,691 INFO L78 Accepts]: Start accepts. Automaton has 4622 states and 8148 transitions. Word has length 16 [2020-10-27 19:31:49,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:31:49,692 INFO L481 AbstractCegarLoop]: Abstraction has 4622 states and 8148 transitions. [2020-10-27 19:31:49,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:31:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 4622 states and 8148 transitions. [2020-10-27 19:31:49,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 19:31:49,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:31:49,700 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:31:49,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:31:49,701 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:31:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:31:49,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1900298053, now seen corresponding path program 1 times [2020-10-27 19:31:49,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:31:49,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881644413] [2020-10-27 19:31:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:31:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:49,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:50,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:51,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:51,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 19:31:51,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:31:51,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1212 [2020-10-27 19:31:51,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:51,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:31:51,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 19:31:51,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:31:51,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:31:51,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:31:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:51,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:51,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:51,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:31:51,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:31:51,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:31:51,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:51,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:31:51,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:31:51,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:31:51,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:31:51,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:31:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:51,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:51,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:51,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 19:31:51,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:31:51,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 19:31:51,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:51,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:31:51,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:31:51,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 19:31:51,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:31:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:31:51,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881644413] [2020-10-27 19:31:51,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:31:51,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:31:51,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050596666] [2020-10-27 19:31:51,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:31:51,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:31:51,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:31:51,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:31:51,344 INFO L87 Difference]: Start difference. First operand 4622 states and 8148 transitions. Second operand 5 states. [2020-10-27 19:32:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:32:31,061 INFO L93 Difference]: Finished difference Result 13503 states and 24181 transitions. [2020-10-27 19:32:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:32:31,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-10-27 19:32:31,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:32:31,120 INFO L225 Difference]: With dead ends: 13503 [2020-10-27 19:32:31,120 INFO L226 Difference]: Without dead ends: 8887 [2020-10-27 19:32:31,134 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 19:32:31,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2020-10-27 19:32:31,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 8867. [2020-10-27 19:32:31,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8867 states. [2020-10-27 19:32:31,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8867 states to 8867 states and 13864 transitions. [2020-10-27 19:32:31,410 INFO L78 Accepts]: Start accepts. Automaton has 8867 states and 13864 transitions. Word has length 88 [2020-10-27 19:32:31,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:32:31,411 INFO L481 AbstractCegarLoop]: Abstraction has 8867 states and 13864 transitions. [2020-10-27 19:32:31,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:32:31,411 INFO L276 IsEmpty]: Start isEmpty. Operand 8867 states and 13864 transitions. [2020-10-27 19:32:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 19:32:31,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:32:31,416 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:32:31,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:32:31,419 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:32:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:32:31,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1756962353, now seen corresponding path program 1 times [2020-10-27 19:32:31,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:32:31,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898352671] [2020-10-27 19:32:31,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:32:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:31,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:31,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:31,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:32,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:32,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 19:32:32,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:32:32,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1116 [2020-10-27 19:32:32,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:32,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:32:32,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-27 19:32:32,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 19:32:32,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:32:32,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:32:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:32,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:32,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:32,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:32:32,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:32:32,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:32:32,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:32,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:32:32,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:32:32,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:32:32,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:32:32,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:32:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:32,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:32,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:32,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:32:32,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:32:32,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-27 19:32:32,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:32,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:32:32,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:32:32,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 19:32:32,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:32:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:32:33,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898352671] [2020-10-27 19:32:33,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:32:33,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:32:33,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639911423] [2020-10-27 19:32:33,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:32:33,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:32:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:32:33,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:32:33,047 INFO L87 Difference]: Start difference. First operand 8867 states and 13864 transitions. Second operand 5 states. [2020-10-27 19:33:24,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:33:24,829 INFO L93 Difference]: Finished difference Result 21973 states and 35731 transitions. [2020-10-27 19:33:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:33:24,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2020-10-27 19:33:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:33:24,911 INFO L225 Difference]: With dead ends: 21973 [2020-10-27 19:33:24,911 INFO L226 Difference]: Without dead ends: 13112 [2020-10-27 19:33:24,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:33:24,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13112 states. [2020-10-27 19:33:25,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13112 to 13101. [2020-10-27 19:33:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13101 states. [2020-10-27 19:33:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13101 states to 13101 states and 19027 transitions. [2020-10-27 19:33:25,401 INFO L78 Accepts]: Start accepts. Automaton has 13101 states and 19027 transitions. Word has length 103 [2020-10-27 19:33:25,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:33:25,402 INFO L481 AbstractCegarLoop]: Abstraction has 13101 states and 19027 transitions. [2020-10-27 19:33:25,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:33:25,403 INFO L276 IsEmpty]: Start isEmpty. Operand 13101 states and 19027 transitions. [2020-10-27 19:33:25,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 19:33:25,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:33:25,409 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:33:25,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:33:25,409 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:33:25,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:33:25,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1212394258, now seen corresponding path program 1 times [2020-10-27 19:33:25,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:33:25,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992370385] [2020-10-27 19:33:25,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:33:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:33:25,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:25,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:26,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:33:26,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 19:33:26,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:33:26,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1349 [2020-10-27 19:33:26,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:33:26,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:33:26,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-27 19:33:26,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 19:33:26,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:33:27,041 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:33:27,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:33:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:33:27,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:27,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:33:27,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:33:27,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:33:27,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:33:27,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:33:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:33:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:33:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:33:27,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:33:27,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:33:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:33:27,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:27,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:33:27,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 19:33:27,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:33:27,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-27 19:33:27,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:33:27,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:33:27,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:33:27,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 19:33:27,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:33:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:33:27,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992370385] [2020-10-27 19:33:27,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:33:27,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:33:27,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694928396] [2020-10-27 19:33:27,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:33:27,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:33:27,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:33:27,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:33:27,472 INFO L87 Difference]: Start difference. First operand 13101 states and 19027 transitions. Second operand 6 states. [2020-10-27 19:33:27,678 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:33:28,683 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 67