/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 05:27:40,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 05:27:40,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 05:27:40,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 05:27:40,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 05:27:40,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 05:27:40,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 05:27:40,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 05:27:40,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 05:27:40,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 05:27:40,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 05:27:40,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 05:27:40,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 05:27:40,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 05:27:40,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 05:27:40,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 05:27:40,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 05:27:40,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 05:27:40,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 05:27:40,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 05:27:40,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 05:27:40,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 05:27:40,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 05:27:40,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 05:27:40,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 05:27:40,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 05:27:40,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 05:27:40,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 05:27:40,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 05:27:40,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 05:27:40,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 05:27:40,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 05:27:40,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 05:27:40,915 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 [2020-08-22 05:27:40,938 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 05:27:40,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 05:27:40,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 05:27:40,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 05:27:40,941 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 05:27:40,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 05:27:40,941 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 05:27:40,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 05:27:40,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 05:27:40,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 05:27:40,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 05:27:40,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 05:27:40,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 05:27:40,943 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 05:27:40,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 05:27:40,943 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 05:27:40,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 05:27:40,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 05:27:40,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 05:27:40,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 05:27:40,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 05:27:40,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:27:40,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 05:27:40,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 05:27:40,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 05:27:40,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 05:27:40,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 05:27:40,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 05:27:40,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 05:27:40,946 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-08-22 05:27:41,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 05:27:41,274 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 05:27:41,278 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 05:27:41,279 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 05:27:41,281 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 05:27:41,282 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-22 05:27:41,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/123ffd380/e51a226ec8e14ed1a3f9a57dcb38f1f9/FLAG9f8621b42 [2020-08-22 05:27:41,780 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 05:27:41,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-22 05:27:41,788 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/123ffd380/e51a226ec8e14ed1a3f9a57dcb38f1f9/FLAG9f8621b42 [2020-08-22 05:27:42,148 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/123ffd380/e51a226ec8e14ed1a3f9a57dcb38f1f9 [2020-08-22 05:27:42,160 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 05:27:42,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 05:27:42,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 05:27:42,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 05:27:42,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 05:27:42,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:27:42" (1/1) ... [2020-08-22 05:27:42,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f68fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:42, skipping insertion in model container [2020-08-22 05:27:42,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:27:42" (1/1) ... [2020-08-22 05:27:42,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 05:27:42,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 05:27:42,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:27:42,433 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 05:27:42,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:27:42,462 INFO L208 MainTranslator]: Completed translation [2020-08-22 05:27:42,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:42 WrapperNode [2020-08-22 05:27:42,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 05:27:42,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 05:27:42,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 05:27:42,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 05:27:42,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:42" (1/1) ... [2020-08-22 05:27:42,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:42" (1/1) ... [2020-08-22 05:27:42,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:42" (1/1) ... [2020-08-22 05:27:42,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:42" (1/1) ... [2020-08-22 05:27:42,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:42" (1/1) ... [2020-08-22 05:27:42,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:42" (1/1) ... [2020-08-22 05:27:42,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:42" (1/1) ... [2020-08-22 05:27:42,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 05:27:42,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 05:27:42,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 05:27:42,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 05:27:42,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:42" (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 [2020-08-22 05:27:42,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 05:27:42,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 05:27:42,638 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 05:27:42,639 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 05:27:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 05:27:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 05:27:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 05:27:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 05:27:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 05:27:42,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 05:27:42,805 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 05:27:42,806 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 05:27:42,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:27:42 BoogieIcfgContainer [2020-08-22 05:27:42,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 05:27:42,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 05:27:42,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 05:27:42,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 05:27:42,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:27:42" (1/3) ... [2020-08-22 05:27:42,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a716ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:27:42, skipping insertion in model container [2020-08-22 05:27:42,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:42" (2/3) ... [2020-08-22 05:27:42,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a716ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:27:42, skipping insertion in model container [2020-08-22 05:27:42,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:27:42" (3/3) ... [2020-08-22 05:27:42,818 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2020-08-22 05:27:42,826 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 05:27:42,832 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 05:27:42,844 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 05:27:42,869 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 05:27:42,869 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 05:27:42,869 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 05:27:42,869 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 05:27:42,869 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 05:27:42,870 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 05:27:42,870 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 05:27:42,870 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 05:27:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 05:27:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 05:27:42,895 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:42,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:27:42,897 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:42,902 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-22 05:27:42,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:42,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307381188] [2020-08-22 05:27:42,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:43,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:43,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:27:43,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307381188] [2020-08-22 05:27:43,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:27:43,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 05:27:43,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630648924] [2020-08-22 05:27:43,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 05:27:43,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:43,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 05:27:43,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 05:27:43,279 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 05:27:43,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:43,349 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-22 05:27:43,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 05:27:43,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 05:27:43,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:43,363 INFO L225 Difference]: With dead ends: 30 [2020-08-22 05:27:43,364 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 05:27:43,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:27:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 05:27:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 05:27:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 05:27:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 05:27:43,423 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 05:27:43,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:43,424 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 05:27:43,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 05:27:43,424 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 05:27:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 05:27:43,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:43,427 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:27:43,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 05:27:43,428 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:43,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:43,429 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-22 05:27:43,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:43,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470965418] [2020-08-22 05:27:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:43,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:43,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:43,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 05:27:43,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470965418] [2020-08-22 05:27:43,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:43,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 05:27:43,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459469446] [2020-08-22 05:27:43,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:27:43,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:43,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:27:43,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:27:43,596 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-22 05:27:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:43,679 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 05:27:43,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 05:27:43,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-22 05:27:43,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:43,682 INFO L225 Difference]: With dead ends: 25 [2020-08-22 05:27:43,683 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 05:27:43,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:27:43,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 05:27:43,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 05:27:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 05:27:43,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 05:27:43,700 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 05:27:43,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:43,702 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 05:27:43,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:27:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 05:27:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 05:27:43,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:43,705 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:27:43,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 05:27:43,707 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:43,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:43,708 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-22 05:27:43,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:43,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934573572] [2020-08-22 05:27:43,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:43,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:43,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:43,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:43,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 05:27:43,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934573572] [2020-08-22 05:27:43,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:43,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 05:27:43,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587358440] [2020-08-22 05:27:43,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 05:27:43,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:43,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 05:27:43,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 05:27:43,900 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-22 05:27:43,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:43,964 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 05:27:43,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 05:27:43,964 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-22 05:27:43,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:43,966 INFO L225 Difference]: With dead ends: 28 [2020-08-22 05:27:43,966 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 05:27:43,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:27:43,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 05:27:43,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 05:27:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 05:27:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 05:27:43,974 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 05:27:43,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:43,974 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 05:27:43,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 05:27:43,975 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 05:27:43,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 05:27:43,976 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:43,976 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:27:43,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 05:27:43,977 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:43,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:43,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-22 05:27:43,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:43,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225631478] [2020-08-22 05:27:43,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 05:27:44,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225631478] [2020-08-22 05:27:44,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:44,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 05:27:44,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628552641] [2020-08-22 05:27:44,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 05:27:44,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:44,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 05:27:44,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:27:44,127 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-22 05:27:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:44,220 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 05:27:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 05:27:44,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-22 05:27:44,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:44,222 INFO L225 Difference]: With dead ends: 31 [2020-08-22 05:27:44,222 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 05:27:44,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-22 05:27:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 05:27:44,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 05:27:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 05:27:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 05:27:44,230 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 05:27:44,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:44,230 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 05:27:44,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 05:27:44,231 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 05:27:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 05:27:44,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:44,232 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:27:44,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 05:27:44,233 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:44,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:44,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-22 05:27:44,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:44,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748462031] [2020-08-22 05:27:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 05:27:44,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748462031] [2020-08-22 05:27:44,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:44,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 05:27:44,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434144156] [2020-08-22 05:27:44,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 05:27:44,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:44,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 05:27:44,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:27:44,390 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-22 05:27:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:44,472 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 05:27:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 05:27:44,473 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-22 05:27:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:44,474 INFO L225 Difference]: With dead ends: 34 [2020-08-22 05:27:44,474 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 05:27:44,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-22 05:27:44,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 05:27:44,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 05:27:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 05:27:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 05:27:44,482 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 05:27:44,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:44,483 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 05:27:44,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 05:27:44,483 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 05:27:44,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 05:27:44,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:44,484 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:27:44,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 05:27:44,485 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:44,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:44,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-22 05:27:44,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:44,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602507563] [2020-08-22 05:27:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 05:27:44,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602507563] [2020-08-22 05:27:44,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:44,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 05:27:44,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841243056] [2020-08-22 05:27:44,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 05:27:44,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:44,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 05:27:44,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:27:44,692 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-22 05:27:44,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:44,793 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 05:27:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 05:27:44,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-22 05:27:44,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:44,795 INFO L225 Difference]: With dead ends: 37 [2020-08-22 05:27:44,795 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 05:27:44,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-22 05:27:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 05:27:44,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 05:27:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 05:27:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 05:27:44,802 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 05:27:44,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:44,803 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 05:27:44,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 05:27:44,803 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 05:27:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 05:27:44,804 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:44,804 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:27:44,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 05:27:44,805 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:44,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:44,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-22 05:27:44,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:44,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899606618] [2020-08-22 05:27:44,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:44,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 05:27:45,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899606618] [2020-08-22 05:27:45,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:45,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 05:27:45,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215400854] [2020-08-22 05:27:45,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 05:27:45,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:45,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 05:27:45,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 05:27:45,067 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-22 05:27:45,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:45,191 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 05:27:45,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 05:27:45,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-22 05:27:45,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:45,193 INFO L225 Difference]: With dead ends: 40 [2020-08-22 05:27:45,193 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 05:27:45,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-22 05:27:45,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 05:27:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 05:27:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 05:27:45,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 05:27:45,205 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 05:27:45,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:45,205 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 05:27:45,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 05:27:45,206 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 05:27:45,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 05:27:45,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:45,209 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:27:45,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 05:27:45,210 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:45,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:45,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-22 05:27:45,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:45,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72987983] [2020-08-22 05:27:45,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 05:27:45,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72987983] [2020-08-22 05:27:45,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:45,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 05:27:45,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032821340] [2020-08-22 05:27:45,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 05:27:45,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:45,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 05:27:45,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 05:27:45,432 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-22 05:27:45,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:45,559 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 05:27:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 05:27:45,560 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-22 05:27:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:45,561 INFO L225 Difference]: With dead ends: 43 [2020-08-22 05:27:45,562 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 05:27:45,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-22 05:27:45,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 05:27:45,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 05:27:45,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 05:27:45,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 05:27:45,569 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 05:27:45,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:45,570 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 05:27:45,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 05:27:45,570 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 05:27:45,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 05:27:45,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:45,571 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:27:45,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 05:27:45,572 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:45,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:45,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-22 05:27:45,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:45,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921816458] [2020-08-22 05:27:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 05:27:45,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921816458] [2020-08-22 05:27:45,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:45,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 05:27:45,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704109411] [2020-08-22 05:27:45,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 05:27:45,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:45,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 05:27:45,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 05:27:45,824 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-22 05:27:45,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:45,978 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 05:27:45,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 05:27:45,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-22 05:27:45,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:45,980 INFO L225 Difference]: With dead ends: 46 [2020-08-22 05:27:45,980 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 05:27:45,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-22 05:27:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 05:27:45,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 05:27:45,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 05:27:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 05:27:45,988 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 05:27:45,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:45,989 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 05:27:45,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 05:27:45,989 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 05:27:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 05:27:45,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:45,991 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:27:45,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 05:27:45,991 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:45,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:45,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-22 05:27:45,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:45,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524592647] [2020-08-22 05:27:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:46,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:46,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:46,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:46,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:46,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:46,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:46,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:46,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:46,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:46,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:46,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 05:27:46,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524592647] [2020-08-22 05:27:46,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:46,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 05:27:46,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697809819] [2020-08-22 05:27:46,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 05:27:46,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:46,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 05:27:46,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 05:27:46,331 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-22 05:27:46,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:46,485 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 05:27:46,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 05:27:46,485 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-22 05:27:46,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:46,487 INFO L225 Difference]: With dead ends: 49 [2020-08-22 05:27:46,487 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 05:27:46,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-22 05:27:46,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 05:27:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 05:27:46,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 05:27:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 05:27:46,493 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 05:27:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:46,494 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 05:27:46,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 05:27:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 05:27:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 05:27:46,495 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:46,496 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:27:46,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 05:27:46,496 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:46,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:46,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-22 05:27:46,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:46,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294466717] [2020-08-22 05:27:46,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 05:27:46,509 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 05:27:46,509 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 05:27:46,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 05:27:46,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 05:27:46 BoogieIcfgContainer [2020-08-22 05:27:46,538 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 05:27:46,541 INFO L168 Benchmark]: Toolchain (without parser) took 4378.67 ms. Allocated memory was 137.9 MB in the beginning and 250.6 MB in the end (delta: 112.7 MB). Free memory was 100.9 MB in the beginning and 101.1 MB in the end (delta: -199.2 kB). Peak memory consumption was 112.5 MB. Max. memory is 7.1 GB. [2020-08-22 05:27:46,541 INFO L168 Benchmark]: CDTParser took 0.72 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 05:27:46,542 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.33 ms. Allocated memory is still 137.9 MB. Free memory was 100.5 MB in the beginning and 91.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-08-22 05:27:46,543 INFO L168 Benchmark]: Boogie Preprocessor took 24.56 ms. Allocated memory is still 137.9 MB. Free memory was 91.5 MB in the beginning and 90.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-22 05:27:46,543 INFO L168 Benchmark]: RCFGBuilder took 320.94 ms. Allocated memory was 137.9 MB in the beginning and 199.2 MB in the end (delta: 61.3 MB). Free memory was 89.9 MB in the beginning and 167.0 MB in the end (delta: -77.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-22 05:27:46,544 INFO L168 Benchmark]: TraceAbstraction took 3727.49 ms. Allocated memory was 199.2 MB in the beginning and 250.6 MB in the end (delta: 51.4 MB). Free memory was 166.3 MB in the beginning and 101.1 MB in the end (delta: 65.2 MB). Peak memory consumption was 116.6 MB. Max. memory is 7.1 GB. [2020-08-22 05:27:46,547 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.72 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 300.33 ms. Allocated memory is still 137.9 MB. Free memory was 100.5 MB in the beginning and 91.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.56 ms. Allocated memory is still 137.9 MB. Free memory was 91.5 MB in the beginning and 90.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 320.94 ms. Allocated memory was 137.9 MB in the beginning and 199.2 MB in the end (delta: 61.3 MB). Free memory was 89.9 MB in the beginning and 167.0 MB in the end (delta: -77.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3727.49 ms. Allocated memory was 199.2 MB in the beginning and 250.6 MB in the end (delta: 51.4 MB). Free memory was 166.3 MB in the beginning and 101.1 MB in the end (delta: 65.2 MB). Peak memory consumption was 116.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 10; [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.6s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 134 SDtfs, 163 SDslu, 424 SDs, 0 SdLazy, 255 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 390 ConstructedInterpolants, 0 QuantifiedInterpolants, 43800 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 450/900 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...