/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:12:03,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:12:03,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:12:03,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:12:03,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:12:03,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:12:03,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:12:03,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:12:03,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:12:03,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:12:03,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:12:03,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:12:03,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:12:03,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:12:03,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:12:03,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:12:03,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:12:03,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:12:03,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:12:03,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:12:03,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:12:03,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:12:03,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:12:03,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:12:03,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:12:03,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:12:03,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:12:03,903 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:12:03,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:12:03,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:12:03,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:12:03,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:12:03,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:12:03,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:12:03,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:12:03,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:12:03,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:12:03,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:12:03,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:12:03,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:12:03,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:12:03,945 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:12:03,983 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:12:03,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:12:03,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:12:03,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:12:03,990 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:12:03,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:12:03,991 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:12:03,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:12:03,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:12:03,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:12:03,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:12:03,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:12:03,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:12:03,994 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:12:03,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:12:03,994 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:12:03,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:12:03,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:12:03,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:12:03,995 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:12:03,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:12:03,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:12:03,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:12:03,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:12:03,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:12:03,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:12:03,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:12:03,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:12:03,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:12:03,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:12:04,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:12:04,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:12:04,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:12:04,599 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:12:04,599 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:12:04,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label38.c [2020-10-28 14:12:04,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/14ef53829/6cf5bb9d9c6649daa5926ed0063d41a7/FLAG12d4fc89f [2020-10-28 14:12:06,060 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:12:06,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label38.c [2020-10-28 14:12:06,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/14ef53829/6cf5bb9d9c6649daa5926ed0063d41a7/FLAG12d4fc89f [2020-10-28 14:12:06,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/14ef53829/6cf5bb9d9c6649daa5926ed0063d41a7 [2020-10-28 14:12:06,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:12:06,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:12:06,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:12:06,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:12:06,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:12:06,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:12:06" (1/1) ... [2020-10-28 14:12:06,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f5c9b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:12:06, skipping insertion in model container [2020-10-28 14:12:06,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:12:06" (1/1) ... [2020-10-28 14:12:06,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:12:06,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:12:09,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:12:09,133 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:12:10,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:12:10,736 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:12:10,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:12:10 WrapperNode [2020-10-28 14:12:10,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:12:10,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:12:10,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:12:10,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:12:10,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:12:10" (1/1) ... [2020-10-28 14:12:10,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:12:10" (1/1) ... [2020-10-28 14:12:10,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:12:10" (1/1) ... [2020-10-28 14:12:10,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:12:10" (1/1) ... [2020-10-28 14:12:11,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:12:10" (1/1) ... [2020-10-28 14:12:11,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:12:10" (1/1) ... [2020-10-28 14:12:11,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:12:10" (1/1) ... [2020-10-28 14:12:11,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:12:11,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:12:11,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:12:11,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:12:11,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:12:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:12:11,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:12:11,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:12:11,726 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:12:11,727 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:12:11,727 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:12:11,727 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:12:11,727 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:12:11,727 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:12:11,727 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:12:11,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:12:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:12:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:12:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:12:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:12:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:12:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:12:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:12:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:12:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:12:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:12:11,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:12:11,730 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:12:11,730 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:12:11,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:12:11,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:12:11,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:12:11,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:12:11,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:12:11,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:12:30,358 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:12:30,359 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:12:30,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:12:30 BoogieIcfgContainer [2020-10-28 14:12:30,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:12:30,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:12:30,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:12:30,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:12:30,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:12:06" (1/3) ... [2020-10-28 14:12:30,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4fe634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:12:30, skipping insertion in model container [2020-10-28 14:12:30,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:12:10" (2/3) ... [2020-10-28 14:12:30,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4fe634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:12:30, skipping insertion in model container [2020-10-28 14:12:30,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:12:30" (3/3) ... [2020-10-28 14:12:30,380 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label38.c [2020-10-28 14:12:30,397 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:12:30,424 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:12:30,446 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:12:30,493 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:12:30,494 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:12:30,494 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:12:30,494 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:12:30,494 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:12:30,495 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:12:30,495 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:12:30,495 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:12:30,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:12:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 14:12:30,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:12:30,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:12:30,591 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:12:30,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:12:30,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1941657181, now seen corresponding path program 1 times [2020-10-28 14:12:30,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:12:30,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430270830] [2020-10-28 14:12:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:12:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:31,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:31,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:31,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:12:31,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:12:31,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1057 [2020-10-28 14:12:31,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:31,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:31,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:12:31,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:12:31,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 14:12:31,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:12:32,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:12:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:32,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:32,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:32,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:12:32,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:12:32,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-28 14:12:32,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:32,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:32,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:12:32,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:12:32,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:12:32,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:12:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:12:32,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430270830] [2020-10-28 14:12:32,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:12:32,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:12:32,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834191277] [2020-10-28 14:12:32,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:12:32,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:12:32,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:12:32,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:12:32,358 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-28 14:13:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:13:21,396 INFO L93 Difference]: Finished difference Result 6578 states and 12495 transitions. [2020-10-28 14:13:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:13:21,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-28 14:13:21,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:13:21,467 INFO L225 Difference]: With dead ends: 6578 [2020-10-28 14:13:21,467 INFO L226 Difference]: Without dead ends: 4729 [2020-10-28 14:13:21,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:13:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4729 states. [2020-10-28 14:13:21,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4729 to 4626. [2020-10-28 14:13:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4626 states. [2020-10-28 14:13:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 8167 transitions. [2020-10-28 14:13:21,769 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 8167 transitions. Word has length 66 [2020-10-28 14:13:21,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:13:21,771 INFO L481 AbstractCegarLoop]: Abstraction has 4626 states and 8167 transitions. [2020-10-28 14:13:21,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:13:21,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 8167 transitions. [2020-10-28 14:13:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-28 14:13:21,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:13:21,779 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:13:21,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:13:21,780 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:13:21,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:13:21,781 INFO L82 PathProgramCache]: Analyzing trace with hash 724043220, now seen corresponding path program 1 times [2020-10-28 14:13:21,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:13:21,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506938574] [2020-10-28 14:13:21,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:13:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:21,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:22,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:23,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:23,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:23,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-28 14:13:23,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:13:23,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1671 [2020-10-28 14:13:23,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:23,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:23,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:13:23,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:13:23,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 14:13:23,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:13:23,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:13:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:23,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:23,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:23,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:13:23,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:13:23,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 14:13:23,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:23,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:23,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:13:23,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:13:23,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:13:23,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:13:23,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:13:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:23,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:23,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:23,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:13:23,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:13:23,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-28 14:13:23,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:23,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:23,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:13:23,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:13:23,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 14:13:23,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:13:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:13:24,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506938574] [2020-10-28 14:13:24,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:13:24,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:13:24,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488819411] [2020-10-28 14:13:24,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:13:24,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:13:24,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:13:24,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:13:24,109 INFO L87 Difference]: Start difference. First operand 4626 states and 8167 transitions. Second operand 7 states. [2020-10-28 14:14:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:14:19,927 INFO L93 Difference]: Finished difference Result 13757 states and 24643 transitions. [2020-10-28 14:14:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:14:19,929 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2020-10-28 14:14:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:14:19,995 INFO L225 Difference]: With dead ends: 13757 [2020-10-28 14:14:19,996 INFO L226 Difference]: Without dead ends: 9137 [2020-10-28 14:14:20,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:14:20,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9137 states. [2020-10-28 14:14:20,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9137 to 8969. [2020-10-28 14:14:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8969 states. [2020-10-28 14:14:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 13526 transitions. [2020-10-28 14:14:20,401 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 13526 transitions. Word has length 141 [2020-10-28 14:14:20,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:14:20,406 INFO L481 AbstractCegarLoop]: Abstraction has 8969 states and 13526 transitions. [2020-10-28 14:14:20,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:14:20,406 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 13526 transitions. [2020-10-28 14:14:20,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-28 14:14:20,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:14:20,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:14:20,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:14:20,422 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:14:20,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:14:20,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1379976472, now seen corresponding path program 1 times [2020-10-28 14:14:20,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:14:20,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212020196] [2020-10-28 14:14:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:14:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:20,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:20,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:21,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:22,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:22,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 14:14:22,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:14:22,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2277 [2020-10-28 14:14:22,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:22,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:22,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:14:22,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:14:22,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 14:14:22,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:14:22,959 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:14:22,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:14:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:22,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:22,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:22,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:14:22,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:14:22,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:14:22,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:22,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:22,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:14:22,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:14:22,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:14:22,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:14:23,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:14:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:23,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:23,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:23,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 14:14:23,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:14:23,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 14:14:23,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:23,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:14:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:14:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 14:14:23,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:14:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:14:23,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212020196] [2020-10-28 14:14:23,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:14:23,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:14:23,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769187661] [2020-10-28 14:14:23,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:14:23,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:14:23,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:14:23,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:14:23,313 INFO L87 Difference]: Start difference. First operand 8969 states and 13526 transitions. Second operand 7 states. [2020-10-28 14:14:23,485 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 14:14:29,824 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 14:15:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:15:23,300 INFO L93 Difference]: Finished difference Result 27221 states and 41923 transitions. [2020-10-28 14:15:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:15:23,305 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2020-10-28 14:15:23,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:15:23,428 INFO L225 Difference]: With dead ends: 27221 [2020-10-28 14:15:23,428 INFO L226 Difference]: Without dead ends: 18258 [2020-10-28 14:15:23,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:15:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18258 states. [2020-10-28 14:15:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18258 to 17953. [2020-10-28 14:15:24,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17953 states. [2020-10-28 14:15:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17953 states to 17953 states and 26468 transitions. [2020-10-28 14:15:24,132 INFO L78 Accepts]: Start accepts. Automaton has 17953 states and 26468 transitions. Word has length 147 [2020-10-28 14:15:24,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:15:24,135 INFO L481 AbstractCegarLoop]: Abstraction has 17953 states and 26468 transitions. [2020-10-28 14:15:24,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:15:24,138 INFO L276 IsEmpty]: Start isEmpty. Operand 17953 states and 26468 transitions. [2020-10-28 14:15:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-28 14:15:24,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:15:24,147 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:15:24,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:15:24,148 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:15:24,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:15:24,149 INFO L82 PathProgramCache]: Analyzing trace with hash 787161983, now seen corresponding path program 1 times [2020-10-28 14:15:24,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:15:24,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413389842] [2020-10-28 14:15:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:15:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:24,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:24,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:24,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:25,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:28,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:29,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:29,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-28 14:15:29,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:15:29,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 14:15:29,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:29,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:15:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-28 14:15:29,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-28 14:15:29,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:15:29,431 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:15:29,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:15:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:29,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:29,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:29,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:15:29,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:15:29,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:15:29,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:29,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:29,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:15:29,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:15:29,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:15:29,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:15:29,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:15:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:29,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:29,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:29,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 14:15:29,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:15:29,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-28 14:15:29,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:29,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:29,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:15:29,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:15:29,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 14:15:29,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:15:29,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-28 14:15:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:29,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:29,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:29,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:29,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:15:29,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:15:29,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-28 14:15:29,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:29,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:29,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:15:29,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:15:29,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 14:15:29,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:15:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 182 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 14:15:30,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413389842] [2020-10-28 14:15:30,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:15:30,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:15:30,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956689711] [2020-10-28 14:15:30,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:15:30,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:15:30,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:15:30,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:15:30,203 INFO L87 Difference]: Start difference. First operand 17953 states and 26468 transitions. Second operand 6 states.