/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:54:34,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:54:34,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:54:34,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:54:34,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:54:34,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:54:34,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:54:34,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:54:34,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:54:34,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:54:34,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:54:34,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:54:34,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:54:34,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:54:34,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:54:34,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:54:34,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:54:34,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:54:34,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:54:34,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:54:34,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:54:34,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:54:34,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:54:34,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:54:34,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:54:34,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:54:34,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:54:34,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:54:34,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:54:34,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:54:34,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:54:34,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:54:34,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:54:34,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:54:34,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:54:34,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:54:34,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:54:34,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:54:34,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:54:34,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:54:34,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:54:34,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 08:54:34,895 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:54:34,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:54:34,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:54:34,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:54:34,901 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:54:34,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:54:34,902 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:54:34,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:54:34,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:54:34,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:54:34,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:54:34,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:54:34,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:54:34,905 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:54:34,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:54:34,905 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:54:34,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:54:34,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:54:34,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:54:34,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:54:34,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:54:34,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:54:34,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:54:34,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:54:34,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:54:34,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:54:34,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:54:34,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:54:34,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:54:34,909 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:54:35,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:54:35,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:54:35,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:54:35,492 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:54:35,493 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:54:35,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label43.c [2020-10-29 08:54:35,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/748ac2371/747730a3a79d4e50abfdc309f43ea52e/FLAGda952072a [2020-10-29 08:54:36,830 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:54:36,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label43.c [2020-10-29 08:54:36,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/748ac2371/747730a3a79d4e50abfdc309f43ea52e/FLAGda952072a [2020-10-29 08:54:37,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/748ac2371/747730a3a79d4e50abfdc309f43ea52e [2020-10-29 08:54:37,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:54:37,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:54:37,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:54:37,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:54:37,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:54:37,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:54:37" (1/1) ... [2020-10-29 08:54:37,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b5540fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:37, skipping insertion in model container [2020-10-29 08:54:37,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:54:37" (1/1) ... [2020-10-29 08:54:37,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:54:37,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:54:39,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:54:39,551 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:54:40,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:54:40,828 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:54:40,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40 WrapperNode [2020-10-29 08:54:40,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:54:40,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:54:40,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:54:40,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:54:40,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (1/1) ... [2020-10-29 08:54:40,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (1/1) ... [2020-10-29 08:54:41,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (1/1) ... [2020-10-29 08:54:41,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (1/1) ... [2020-10-29 08:54:41,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (1/1) ... [2020-10-29 08:54:41,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (1/1) ... [2020-10-29 08:54:41,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (1/1) ... [2020-10-29 08:54:41,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:54:41,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:54:41,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:54:41,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:54:41,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:54:41,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:54:41,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:54:41,568 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:54:41,568 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:54:41,568 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:54:41,569 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:54:41,569 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 08:54:41,569 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-29 08:54:41,569 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-29 08:54:41,569 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:54:41,571 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:54:41,571 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:54:41,571 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:54:41,572 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 08:54:41,572 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-29 08:54:41,573 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-29 08:54:41,574 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:54:41,574 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:54:41,574 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:54:41,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:54:41,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:54:41,575 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:54:41,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:54:41,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:54:41,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:54:41,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:54:41,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:54:41,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:54:41,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:54:56,846 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:54:56,846 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:54:56,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:54:56 BoogieIcfgContainer [2020-10-29 08:54:56,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:54:56,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:54:56,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:54:56,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:54:56,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:54:37" (1/3) ... [2020-10-29 08:54:56,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ace29f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:54:56, skipping insertion in model container [2020-10-29 08:54:56,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:54:40" (2/3) ... [2020-10-29 08:54:56,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ace29f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:54:56, skipping insertion in model container [2020-10-29 08:54:56,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:54:56" (3/3) ... [2020-10-29 08:54:56,865 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label43.c [2020-10-29 08:54:56,879 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:54:56,887 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:54:56,904 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:54:56,948 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:54:56,949 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:54:56,949 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:54:56,949 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:54:56,949 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:54:56,949 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:54:56,949 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:54:56,949 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:54:57,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-29 08:54:57,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 08:54:57,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:54:57,009 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] [2020-10-29 08:54:57,009 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:54:57,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:54:57,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1687638702, now seen corresponding path program 1 times [2020-10-29 08:54:57,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:54:57,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552864967] [2020-10-29 08:54:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:54:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:54:57,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:54:57,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:54:57,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 08:54:57,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:54:57,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-29 08:54:57,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:54:57,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:54:57,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:54:57,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:54:57,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 08:54:57,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 08:54:58,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:54:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:54:58,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:54:58,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:54:58,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:54:58,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:54:58,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 08:54:58,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:54:58,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:54:58,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:54:58,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:54:58,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:54:58,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:54:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:54:58,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552864967] [2020-10-29 08:54:58,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:54:58,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:54:58,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741840429] [2020-10-29 08:54:58,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:54:58,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:54:58,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:54:58,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:54:58,176 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-29 08:55:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:55:30,292 INFO L93 Difference]: Finished difference Result 5036 states and 9459 transitions. [2020-10-29 08:55:30,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:55:30,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-29 08:55:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:55:30,352 INFO L225 Difference]: With dead ends: 5036 [2020-10-29 08:55:30,352 INFO L226 Difference]: Without dead ends: 3191 [2020-10-29 08:55:30,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:55:30,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2020-10-29 08:55:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3185. [2020-10-29 08:55:30,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3185 states. [2020-10-29 08:55:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 4966 transitions. [2020-10-29 08:55:30,622 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 4966 transitions. Word has length 29 [2020-10-29 08:55:30,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:55:30,623 INFO L481 AbstractCegarLoop]: Abstraction has 3185 states and 4966 transitions. [2020-10-29 08:55:30,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:55:30,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 4966 transitions. [2020-10-29 08:55:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-29 08:55:30,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:55:30,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:55:30,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:55:30,630 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:55:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:55:30,631 INFO L82 PathProgramCache]: Analyzing trace with hash -974389909, now seen corresponding path program 1 times [2020-10-29 08:55:30,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:55:30,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051822450] [2020-10-29 08:55:30,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:55:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:55:30,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:30,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:30,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:31,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:32,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:55:32,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-29 08:55:32,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:55:32,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2173 [2020-10-29 08:55:32,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:55:32,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:55:32,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:55:32,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:55:32,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 08:55:32,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:55:32,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:55:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:55:32,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:33,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:55:33,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:55:33,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:55:33,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 08:55:33,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:55:33,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:55:33,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:55:33,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:55:33,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:55:33,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:55:33,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:55:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:55:33,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:33,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:55:33,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:55:33,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 08:55:33,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:55:33,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-29 08:55:33,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:55:33,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:55:33,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:55:33,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:55:33,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 08:55:33,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:55:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:55:33,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051822450] [2020-10-29 08:55:33,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:55:33,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:55:33,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24155684] [2020-10-29 08:55:33,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:55:33,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:55:33,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:55:33,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:55:33,551 INFO L87 Difference]: Start difference. First operand 3185 states and 4966 transitions. Second operand 7 states. [2020-10-29 08:56:32,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:56:32,145 INFO L93 Difference]: Finished difference Result 9397 states and 14721 transitions. [2020-10-29 08:56:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:56:32,150 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 102 [2020-10-29 08:56:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:56:32,197 INFO L225 Difference]: With dead ends: 9397 [2020-10-29 08:56:32,197 INFO L226 Difference]: Without dead ends: 6218 [2020-10-29 08:56:32,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:56:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6218 states. [2020-10-29 08:56:32,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6218 to 6096. [2020-10-29 08:56:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6096 states. [2020-10-29 08:56:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6096 states to 6096 states and 8428 transitions. [2020-10-29 08:56:32,469 INFO L78 Accepts]: Start accepts. Automaton has 6096 states and 8428 transitions. Word has length 102 [2020-10-29 08:56:32,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:56:32,471 INFO L481 AbstractCegarLoop]: Abstraction has 6096 states and 8428 transitions. [2020-10-29 08:56:32,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:56:32,471 INFO L276 IsEmpty]: Start isEmpty. Operand 6096 states and 8428 transitions. [2020-10-29 08:56:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-29 08:56:32,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:56:32,485 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:56:32,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:56:32,486 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:56:32,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:56:32,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1483862999, now seen corresponding path program 1 times [2020-10-29 08:56:32,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:56:32,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301977322] [2020-10-29 08:56:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:56:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:56:32,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:56:32,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:56:33,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:56:33,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:56:34,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:56:34,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-29 08:56:34,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:56:34,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1552 [2020-10-29 08:56:34,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:56:34,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:56:34,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:56:34,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:56:34,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 08:56:34,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:56:34,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:56:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:56:34,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:56:34,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:56:34,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:56:34,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:56:34,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 08:56:34,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:56:34,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:56:34,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:56:34,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:56:34,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:56:34,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:56:34,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:56:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:56:34,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:56:34,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:56:34,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 08:56:34,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:56:34,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-29 08:56:34,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:56:34,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:56:34,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:56:34,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:56:34,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 08:56:34,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:56:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:56:34,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301977322] [2020-10-29 08:56:34,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:56:34,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:56:34,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753526584] [2020-10-29 08:56:34,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:56:34,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:56:34,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:56:34,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:56:34,774 INFO L87 Difference]: Start difference. First operand 6096 states and 8428 transitions. Second operand 7 states. [2020-10-29 08:57:29,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:57:29,876 INFO L93 Difference]: Finished difference Result 15389 states and 21991 transitions. [2020-10-29 08:57:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:57:29,880 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 102 [2020-10-29 08:57:29,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:57:29,935 INFO L225 Difference]: With dead ends: 15389 [2020-10-29 08:57:29,936 INFO L226 Difference]: Without dead ends: 9299 [2020-10-29 08:57:29,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:57:29,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9299 states. [2020-10-29 08:57:30,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9299 to 9112. [2020-10-29 08:57:30,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9112 states. [2020-10-29 08:57:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9112 states to 9112 states and 12724 transitions. [2020-10-29 08:57:30,187 INFO L78 Accepts]: Start accepts. Automaton has 9112 states and 12724 transitions. Word has length 102 [2020-10-29 08:57:30,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:57:30,188 INFO L481 AbstractCegarLoop]: Abstraction has 9112 states and 12724 transitions. [2020-10-29 08:57:30,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:57:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 9112 states and 12724 transitions. [2020-10-29 08:57:30,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-29 08:57:30,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:57:30,190 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:57:30,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:57:30,190 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:57:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:57:30,191 INFO L82 PathProgramCache]: Analyzing trace with hash 169476344, now seen corresponding path program 1 times [2020-10-29 08:57:30,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:57:30,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806602409] [2020-10-29 08:57:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:57:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:57:30,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:30,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:30,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:31,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:57:31,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-29 08:57:31,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:57:31,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1442 [2020-10-29 08:57:31,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:57:31,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:57:31,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:57:31,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:57:31,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-29 08:57:31,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:57:31,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:57:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:57:31,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:31,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:57:31,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:57:31,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:57:31,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 08:57:31,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:57:31,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:57:31,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:57:31,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:57:31,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:57:31,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:57:31,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:57:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:57:31,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:32,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:57:32,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 08:57:32,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:57:32,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-29 08:57:32,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:57:32,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:57:32,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:57:32,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:57:32,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-29 08:57:32,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:57:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:57:32,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806602409] [2020-10-29 08:57:32,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:57:32,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:57:32,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986997989] [2020-10-29 08:57:32,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:57:32,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:57:32,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:57:32,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:57:32,234 INFO L87 Difference]: Start difference. First operand 9112 states and 12724 transitions. Second operand 7 states. [2020-10-29 08:58:32,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:58:32,471 INFO L93 Difference]: Finished difference Result 24397 states and 33771 transitions. [2020-10-29 08:58:32,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:58:32,475 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 130 [2020-10-29 08:58:32,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:58:32,554 INFO L225 Difference]: With dead ends: 24397 [2020-10-29 08:58:32,554 INFO L226 Difference]: Without dead ends: 15291 [2020-10-29 08:58:32,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:58:32,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15291 states. [2020-10-29 08:58:32,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15291 to 14933. [2020-10-29 08:58:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14933 states. [2020-10-29 08:58:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14933 states to 14933 states and 18947 transitions. [2020-10-29 08:58:32,930 INFO L78 Accepts]: Start accepts. Automaton has 14933 states and 18947 transitions. Word has length 130 [2020-10-29 08:58:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:58:32,932 INFO L481 AbstractCegarLoop]: Abstraction has 14933 states and 18947 transitions. [2020-10-29 08:58:32,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:58:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 14933 states and 18947 transitions. [2020-10-29 08:58:32,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-29 08:58:32,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:58:32,938 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:58:32,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 08:58:32,939 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:58:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:58:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1409020798, now seen corresponding path program 1 times [2020-10-29 08:58:32,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:58:32,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085409104] [2020-10-29 08:58:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:58:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:33,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:33,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:35,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:35,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-29 08:58:35,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:58:35,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2227 [2020-10-29 08:58:35,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:35,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:35,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:58:35,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:58:35,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-29 08:58:35,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:58:35,476 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:58:35,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:58:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:35,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:35,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:35,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:58:35,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:58:35,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 08:58:35,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:35,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:35,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:58:35,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:58:35,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:58:35,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:58:35,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:58:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:35,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:36,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:36,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-29 08:58:36,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:58:36,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-29 08:58:36,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:36,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:36,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:58:36,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:58:36,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 212 [2020-10-29 08:58:36,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:58:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:58:36,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085409104] [2020-10-29 08:58:36,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:58:36,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:58:36,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5467627] [2020-10-29 08:58:36,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:58:37,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:58:37,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:58:37,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:58:37,001 INFO L87 Difference]: Start difference. First operand 14933 states and 18947 transitions. Second operand 7 states. [2020-10-29 08:58:37,162 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 72