/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:10:06,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:10:06,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:10:06,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:10:06,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:10:06,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:10:06,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:10:06,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:10:06,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:10:06,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:10:06,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:10:06,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:10:06,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:10:06,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:10:06,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:10:06,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:10:06,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:10:06,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:10:06,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:10:06,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:10:06,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:10:06,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:10:06,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:10:06,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:10:06,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:10:06,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:10:06,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:10:06,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:10:06,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:10:06,882 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:10:06,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:10:06,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:10:06,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:10:06,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:10:06,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:10:06,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:10:06,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:10:06,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:10:06,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:10:06,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:10:06,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:10:06,891 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 [2020-09-25 09:10:06,918 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:10:06,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:10:06,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:10:06,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:10:06,920 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:10:06,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:10:06,920 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:10:06,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:10:06,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:10:06,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:10:06,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:10:06,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:10:06,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:10:06,922 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:10:06,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:10:06,922 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:10:06,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:10:06,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:10:06,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:10:06,923 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:10:06,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:10:06,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:10:06,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:10:06,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:10:06,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:10:06,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:10:06,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:10:06,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:10:06,925 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:10:06,925 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=1.0;log-additional-information=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=1.0;log-additional-information=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=1.0;log-additional-information=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=1.0;log-additional-information=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=1.0;log-additional-information=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=1.0;log-additional-information=true; [2020-09-25 09:10:07,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:10:07,525 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:10:07,530 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:10:07,532 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:10:07,534 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:10:07,535 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 09:10:07,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4a15717f/1f41b89014d549a2bd9acfa8d1b76f78/FLAG08af3f469 [2020-09-25 09:10:08,247 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:10:08,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 09:10:08,257 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4a15717f/1f41b89014d549a2bd9acfa8d1b76f78/FLAG08af3f469 [2020-09-25 09:10:08,550 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4a15717f/1f41b89014d549a2bd9acfa8d1b76f78 [2020-09-25 09:10:08,565 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:10:08,572 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:10:08,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:10:08,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:10:08,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:10:08,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:08,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f58caab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08, skipping insertion in model container [2020-09-25 09:10:08,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:08,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:10:08,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:10:08,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:10:08,856 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:10:08,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:10:08,905 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:10:08,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08 WrapperNode [2020-09-25 09:10:08,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:10:08,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:10:08,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:10:08,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:10:08,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:08,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:09,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:09,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:09,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:09,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:09,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (1/1) ... [2020-09-25 09:10:09,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:10:09,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:10:09,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:10:09,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:10:09,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (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 [2020-09-25 09:10:09,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:10:09,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:10:09,115 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 09:10:09,115 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:10:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:10:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 09:10:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 09:10:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 09:10:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 09:10:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:10:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 09:10:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 09:10:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 09:10:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 09:10:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:10:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:10:09,557 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:10:09,558 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 09:10:09,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:09 BoogieIcfgContainer [2020-09-25 09:10:09,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:10:09,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:10:09,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:10:09,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:10:09,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:10:08" (1/3) ... [2020-09-25 09:10:09,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53894351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:09, skipping insertion in model container [2020-09-25 09:10:09,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:08" (2/3) ... [2020-09-25 09:10:09,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53894351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:09, skipping insertion in model container [2020-09-25 09:10:09,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:09" (3/3) ... [2020-09-25 09:10:09,574 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-09-25 09:10:09,586 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:10:09,596 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:10:09,619 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:10:09,648 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:10:09,648 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:10:09,648 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:10:09,649 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:10:09,649 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:10:09,649 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:10:09,649 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:10:09,649 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:10:09,672 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-09-25 09:10:09,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 09:10:09,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:09,682 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] [2020-09-25 09:10:09,682 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:09,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:09,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1584943199, now seen corresponding path program 1 times [2020-09-25 09:10:09,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:09,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945782782] [2020-09-25 09:10:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:09,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:10,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:10,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:10,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:10,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 09:10:10,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:10:10,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 819 [2020-09-25 09:10:10,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:10,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:10,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:10,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 09:10:10,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:10,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 09:10:10,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:10,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:10,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:10,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:10:10,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:10,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:10:10,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:10,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:10,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:10,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:10,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:10,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:10,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945782782] [2020-09-25 09:10:10,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:10,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 09:10:10,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98642577] [2020-09-25 09:10:10,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 09:10:10,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:10,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 09:10:10,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 09:10:10,811 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 3 states. [2020-09-25 09:10:11,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:11,024 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2020-09-25 09:10:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 09:10:11,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-25 09:10:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:11,038 INFO L225 Difference]: With dead ends: 121 [2020-09-25 09:10:11,038 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 09:10:11,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 09:10:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 09:10:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-25 09:10:11,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 09:10:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-09-25 09:10:11,091 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 31 [2020-09-25 09:10:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:11,091 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-09-25 09:10:11,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 09:10:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-09-25 09:10:11,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 09:10:11,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:11,094 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] [2020-09-25 09:10:11,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:10:11,094 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:11,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:11,095 INFO L82 PathProgramCache]: Analyzing trace with hash -318765620, now seen corresponding path program 1 times [2020-09-25 09:10:11,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:11,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104870256] [2020-09-25 09:10:11,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:11,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:11,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:11,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:11,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:11,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 09:10:11,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 09:10:11,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-09-25 09:10:11,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:11,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:11,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:10:11,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:10:11,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 09:10:11,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:11,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:11,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:11,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:11,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:10:11,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:11,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:10:11,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:11,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:11,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:11,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:11,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:11,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:11,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104870256] [2020-09-25 09:10:11,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:11,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:10:11,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283352053] [2020-09-25 09:10:11,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:10:11,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:11,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:10:11,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:10:11,635 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 5 states. [2020-09-25 09:10:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:11,838 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-09-25 09:10:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:10:11,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-25 09:10:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:11,843 INFO L225 Difference]: With dead ends: 95 [2020-09-25 09:10:11,843 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 09:10:11,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:10:11,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 09:10:11,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-09-25 09:10:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 09:10:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-25 09:10:11,862 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2020-09-25 09:10:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:11,862 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-25 09:10:11,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:10:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-25 09:10:11,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 09:10:11,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:11,865 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] [2020-09-25 09:10:11,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:10:11,865 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:11,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:11,866 INFO L82 PathProgramCache]: Analyzing trace with hash 419131922, now seen corresponding path program 1 times [2020-09-25 09:10:11,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:11,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423334343] [2020-09-25 09:10:11,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:11,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:11,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:12,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:12,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:12,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:12,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:13,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:13,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 09:10:13,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 09:10:13,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1815 [2020-09-25 09:10:13,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:13,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:13,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:10:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 09:10:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 09:10:13,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:13,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:13,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:13,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:13,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:10:13,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:13,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 09:10:13,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:13,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:13,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:13,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:13,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:13,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:10:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 09:10:13,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423334343] [2020-09-25 09:10:13,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:13,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 09:10:13,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196153827] [2020-09-25 09:10:13,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 09:10:13,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:13,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 09:10:13,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:10:13,805 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 6 states. [2020-09-25 09:10:14,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:14,096 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2020-09-25 09:10:14,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 09:10:14,096 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-09-25 09:10:14,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:14,098 INFO L225 Difference]: With dead ends: 118 [2020-09-25 09:10:14,098 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 09:10:14,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:10:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 09:10:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-09-25 09:10:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-25 09:10:14,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-09-25 09:10:14,109 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 41 [2020-09-25 09:10:14,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:14,109 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-09-25 09:10:14,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 09:10:14,109 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-09-25 09:10:14,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 09:10:14,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:14,111 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] [2020-09-25 09:10:14,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:10:14,112 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:14,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:14,112 INFO L82 PathProgramCache]: Analyzing trace with hash -2141827952, now seen corresponding path program 1 times [2020-09-25 09:10:14,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:14,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736361035] [2020-09-25 09:10:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:14,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:14,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:14,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:15,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:16,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:17,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:17,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:18,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:19,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:19,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 09:10:19,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 09:10:19,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 09:10:19,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:19,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:19,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 09:10:19,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:10:19,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 09:10:19,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:19,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:19,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:19,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:19,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:10:19,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:19,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:10:19,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:19,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:19,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:19,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:19,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:19,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:19,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736361035] [2020-09-25 09:10:19,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:19,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 09:10:19,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719691638] [2020-09-25 09:10:19,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 09:10:19,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:19,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 09:10:19,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-09-25 09:10:19,552 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 17 states. [2020-09-25 09:10:20,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:20,802 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2020-09-25 09:10:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 09:10:20,804 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-09-25 09:10:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:20,807 INFO L225 Difference]: With dead ends: 164 [2020-09-25 09:10:20,808 INFO L226 Difference]: Without dead ends: 162 [2020-09-25 09:10:20,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2020-09-25 09:10:20,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-25 09:10:20,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 90. [2020-09-25 09:10:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-25 09:10:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-09-25 09:10:20,834 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 48 [2020-09-25 09:10:20,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:20,836 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-09-25 09:10:20,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 09:10:20,836 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-09-25 09:10:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 09:10:20,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:20,843 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:20,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:10:20,843 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:20,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:20,844 INFO L82 PathProgramCache]: Analyzing trace with hash -523876270, now seen corresponding path program 2 times [2020-09-25 09:10:20,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:20,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289485057] [2020-09-25 09:10:20,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:20,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:21,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:21,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:25,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:25,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 09:10:25,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 09:10:25,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 09:10:25,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:25,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:25,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 09:10:25,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:10:25,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 09:10:25,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:26,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:26,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:26,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:26,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:10:26,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:26,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:10:26,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:26,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:26,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:26,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:26,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:26,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 09:10:26,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289485057] [2020-09-25 09:10:26,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:26,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 09:10:26,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115985857] [2020-09-25 09:10:26,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 09:10:26,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:26,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 09:10:26,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-09-25 09:10:26,377 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 17 states. [2020-09-25 09:10:27,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:27,523 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2020-09-25 09:10:27,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 09:10:27,524 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2020-09-25 09:10:27,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:27,528 INFO L225 Difference]: With dead ends: 142 [2020-09-25 09:10:27,528 INFO L226 Difference]: Without dead ends: 140 [2020-09-25 09:10:27,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2020-09-25 09:10:27,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-25 09:10:27,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 79. [2020-09-25 09:10:27,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-25 09:10:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-09-25 09:10:27,540 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 55 [2020-09-25 09:10:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:27,540 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-09-25 09:10:27,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 09:10:27,541 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-09-25 09:10:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 09:10:27,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:27,542 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 09:10:27,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:10:27,542 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:27,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:27,543 INFO L82 PathProgramCache]: Analyzing trace with hash -2134174762, now seen corresponding path program 3 times [2020-09-25 09:10:27,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:27,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280082083] [2020-09-25 09:10:27,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:27,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:27,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:27,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:28,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:28,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:29,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:29,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:30,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:31,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:32,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:32,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 09:10:32,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 09:10:32,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 09:10:32,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:32,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:32,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:10:32,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 09:10:32,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 09:10:32,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-25 09:10:32,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:32,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:32,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:32,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:10:32,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:32,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 09:10:32,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:32,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:32,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:32,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280082083] [2020-09-25 09:10:32,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:32,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 09:10:32,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299413970] [2020-09-25 09:10:32,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 09:10:32,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:32,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 09:10:32,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 09:10:32,691 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 10 states. [2020-09-25 09:10:33,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:33,039 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2020-09-25 09:10:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 09:10:33,040 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-09-25 09:10:33,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:33,041 INFO L225 Difference]: With dead ends: 171 [2020-09-25 09:10:33,041 INFO L226 Difference]: Without dead ends: 141 [2020-09-25 09:10:33,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-09-25 09:10:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-25 09:10:33,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 100. [2020-09-25 09:10:33,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 09:10:33,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-09-25 09:10:33,062 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 58 [2020-09-25 09:10:33,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:33,062 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-09-25 09:10:33,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 09:10:33,062 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-09-25 09:10:33,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-25 09:10:33,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:33,066 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 09:10:33,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 09:10:33,067 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:33,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:33,067 INFO L82 PathProgramCache]: Analyzing trace with hash -280271430, now seen corresponding path program 1 times [2020-09-25 09:10:33,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:33,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169535120] [2020-09-25 09:10:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:33,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:33,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:34,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:34,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 09:10:34,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:34,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1630 [2020-09-25 09:10:34,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:34,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:34,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:10:34,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 09:10:34,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 09:10:34,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:34,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:34,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:34,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:34,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:10:34,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:34,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:10:34,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:34,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:34,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:34,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:34,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:34,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:34,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 09:10:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:34,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:34,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:34,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:10:34,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:34,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 09:10:34,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:34,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:34,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:10:34,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:34,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:10:34,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 09:10:34,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169535120] [2020-09-25 09:10:34,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:34,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 09:10:34,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101288695] [2020-09-25 09:10:34,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 09:10:34,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:34,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 09:10:34,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 09:10:34,863 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 10 states. [2020-09-25 09:10:35,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:35,176 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2020-09-25 09:10:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 09:10:35,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-09-25 09:10:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:35,178 INFO L225 Difference]: With dead ends: 149 [2020-09-25 09:10:35,179 INFO L226 Difference]: Without dead ends: 102 [2020-09-25 09:10:35,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-25 09:10:35,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-25 09:10:35,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2020-09-25 09:10:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 09:10:35,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-09-25 09:10:35,193 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 64 [2020-09-25 09:10:35,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:35,193 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-09-25 09:10:35,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 09:10:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-09-25 09:10:35,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 09:10:35,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:35,198 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 09:10:35,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 09:10:35,199 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:35,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:35,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1930216728, now seen corresponding path program 4 times [2020-09-25 09:10:35,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:35,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439765739] [2020-09-25 09:10:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:35,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:35,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:35,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:35,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:36,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:37,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:37,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:37,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:38,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:38,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:40,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:40,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 09:10:40,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 09:10:40,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 09:10:40,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:40,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:40,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 09:10:40,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:10:40,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 09:10:40,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:40,925 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-09-25 09:10:41,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:41,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:41,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:41,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:10:41,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:41,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 09:10:41,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:41,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:41,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:41,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:41,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:41,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:41,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439765739] [2020-09-25 09:10:41,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:41,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 09:10:41,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803606301] [2020-09-25 09:10:41,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 09:10:41,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:41,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 09:10:41,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-09-25 09:10:41,160 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 23 states. [2020-09-25 09:10:42,381 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-09-25 09:10:43,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:43,683 INFO L93 Difference]: Finished difference Result 207 states and 219 transitions. [2020-09-25 09:10:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-25 09:10:43,683 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-09-25 09:10:43,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:43,685 INFO L225 Difference]: With dead ends: 207 [2020-09-25 09:10:43,685 INFO L226 Difference]: Without dead ends: 205 [2020-09-25 09:10:43,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2020-09-25 09:10:43,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-25 09:10:43,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 107. [2020-09-25 09:10:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-25 09:10:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-09-25 09:10:43,697 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 65 [2020-09-25 09:10:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:43,697 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-09-25 09:10:43,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 09:10:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-09-25 09:10:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 09:10:43,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:43,699 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 09:10:43,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 09:10:43,699 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:43,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:43,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1059036540, now seen corresponding path program 2 times [2020-09-25 09:10:43,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:43,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978275751] [2020-09-25 09:10:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:43,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:43,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:45,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:45,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 09:10:45,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:45,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1604 [2020-09-25 09:10:45,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:45,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:45,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:10:45,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 09:10:45,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 09:10:45,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:45,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:45,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:45,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:45,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:10:45,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:45,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:10:45,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:45,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:45,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:45,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:45,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:45,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:45,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 09:10:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:45,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:45,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:45,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:10:45,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:45,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:10:45,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:45,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:45,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:10:45,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:45,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:10:45,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:10:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 09:10:45,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978275751] [2020-09-25 09:10:45,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:45,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:10:45,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915636187] [2020-09-25 09:10:45,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:10:45,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:45,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:10:45,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:10:45,435 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 9 states. [2020-09-25 09:10:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:45,765 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2020-09-25 09:10:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 09:10:45,766 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-09-25 09:10:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:45,767 INFO L225 Difference]: With dead ends: 158 [2020-09-25 09:10:45,768 INFO L226 Difference]: Without dead ends: 125 [2020-09-25 09:10:45,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-25 09:10:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-25 09:10:45,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2020-09-25 09:10:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-25 09:10:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-09-25 09:10:45,779 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 71 [2020-09-25 09:10:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:45,779 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-09-25 09:10:45,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:10:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-09-25 09:10:45,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-25 09:10:45,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:45,781 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 09:10:45,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 09:10:45,781 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:45,782 INFO L82 PathProgramCache]: Analyzing trace with hash 499090838, now seen corresponding path program 5 times [2020-09-25 09:10:45,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:45,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655159707] [2020-09-25 09:10:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:45,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:46,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:46,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:46,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:47,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:48,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:49,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:50,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:50,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 09:10:50,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 09:10:50,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 09:10:50,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:50,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:50,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 09:10:50,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:10:50,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-25 09:10:50,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:10:51,309 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2020-09-25 09:10:51,445 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 24 [2020-09-25 09:10:51,592 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 24 [2020-09-25 09:10:51,723 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 23 [2020-09-25 09:10:51,872 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-09-25 09:10:52,051 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2020-09-25 09:10:52,267 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2020-09-25 09:10:52,477 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2020-09-25 09:10:52,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:52,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:52,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:52,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 09:10:52,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:52,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 09:10:52,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:52,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:52,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:52,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:52,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:52,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:10:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 09:10:52,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655159707] [2020-09-25 09:10:52,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:52,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 09:10:52,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700889558] [2020-09-25 09:10:52,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 09:10:52,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:52,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 09:10:52,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-09-25 09:10:52,844 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 23 states.