/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 produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --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/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:31:10,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:31:10,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:31:10,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:31:10,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:31:10,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:31:10,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:31:10,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:31:10,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:31:10,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:31:10,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:31:10,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:31:10,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:31:10,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:31:10,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:31:10,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:31:10,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:31:10,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:31:10,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:31:10,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:31:10,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:31:10,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:31:10,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:31:10,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:31:10,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:31:10,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:31:10,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:31:10,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:31:10,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:31:10,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-21 11:31:10,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:31:10,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:31:10,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:31:10,516 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 [2020-09-21 11:31:10,567 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:31:10,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:31:10,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:31:10,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:31:10,569 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:31:10,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:31:10,570 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:31:10,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:31:10,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:31:10,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:31:10,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:31:10,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:31:10,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:31:10,573 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:31:10,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:31:10,573 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:31:10,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:31:10,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:31:10,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:31:10,574 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:31:10,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:31:10,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:31:10,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:31:10,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:31:10,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:31:10,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:31:10,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:31:10,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:31:10,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:31:10,577 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 -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:31:11,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:31:11,052 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:31:11,056 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:31:11,058 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:31:11,059 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:31:11,060 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-21 11:31:11,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d6ac9a82/d5a412c92c2c43cfb8de9d6764d87185/FLAGd555cfd9a [2020-09-21 11:31:11,665 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:31:11,665 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-21 11:31:11,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d6ac9a82/d5a412c92c2c43cfb8de9d6764d87185/FLAGd555cfd9a [2020-09-21 11:31:11,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d6ac9a82/d5a412c92c2c43cfb8de9d6764d87185 [2020-09-21 11:31:12,013 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:31:12,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:31:12,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:12,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:31:12,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:31:12,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:12,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba61646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12, skipping insertion in model container [2020-09-21 11:31:12,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:12,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:31:12,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:31:12,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:12,267 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:31:12,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:12,303 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:31:12,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12 WrapperNode [2020-09-21 11:31:12,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:12,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:31:12,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:31:12,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:31:12,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:12,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:12,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:12,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:12,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:12,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:12,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (1/1) ... [2020-09-21 11:31:12,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:31:12,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:31:12,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:31:12,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:31:12,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (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 [2020-09-21 11:31:12,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:31:12,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:31:12,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:31:12,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:31:12,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:31:12,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:31:12,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 11:31:12,495 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:31:12,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:31:12,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:31:12,720 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:31:12,721 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:31:12,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:12 BoogieIcfgContainer [2020-09-21 11:31:12,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:31:12,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:31:12,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:31:12,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:31:12,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:31:12" (1/3) ... [2020-09-21 11:31:12,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420559a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:12, skipping insertion in model container [2020-09-21 11:31:12,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:12" (2/3) ... [2020-09-21 11:31:12,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420559a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:12, skipping insertion in model container [2020-09-21 11:31:12,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:12" (3/3) ... [2020-09-21 11:31:12,764 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-09-21 11:31:12,799 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:31:12,820 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:31:12,868 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:31:12,895 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:31:12,896 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:31:12,896 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:31:12,896 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:31:12,896 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:31:12,896 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:31:12,897 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:31:12,897 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:31:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-21 11:31:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 11:31:12,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:12,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:12,924 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:12,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:12,931 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-09-21 11:31:12,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:12,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347769975] [2020-09-21 11:31:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,063 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,064 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,064 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,064 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:31:13,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:31:13,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:13,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:13,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:13,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:13,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,100 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,100 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,101 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,101 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:13,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:13,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:13,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:13,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:13,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:13,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347769975] [2020-09-21 11:31:13,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:13,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 11:31:13,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321482506] [2020-09-21 11:31:13,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 11:31:13,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:13,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 11:31:13,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:31:13,140 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-09-21 11:31:13,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:13,166 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-09-21 11:31:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 11:31:13,167 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-21 11:31:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:13,178 INFO L225 Difference]: With dead ends: 31 [2020-09-21 11:31:13,178 INFO L226 Difference]: Without dead ends: 14 [2020-09-21 11:31:13,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:31:13,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-21 11:31:13,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-09-21 11:31:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-09-21 11:31:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-09-21 11:31:13,227 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-09-21 11:31:13,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:13,227 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-09-21 11:31:13,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 11:31:13,227 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-09-21 11:31:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 11:31:13,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:13,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:13,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:31:13,229 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:13,229 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-09-21 11:31:13,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:13,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125395544] [2020-09-21 11:31:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,306 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,307 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,307 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,307 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:31:13,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-21 11:31:13,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:13,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:13,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:31:13,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:13,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,392 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,392 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,392 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,393 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:13,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:13,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:13,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:13,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:13,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:13,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125395544] [2020-09-21 11:31:13,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:13,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:31:13,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459300307] [2020-09-21 11:31:13,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:31:13,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:13,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:31:13,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:13,402 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-09-21 11:31:13,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:13,456 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-09-21 11:31:13,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:31:13,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-09-21 11:31:13,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:13,458 INFO L225 Difference]: With dead ends: 23 [2020-09-21 11:31:13,458 INFO L226 Difference]: Without dead ends: 18 [2020-09-21 11:31:13,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:13,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-21 11:31:13,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-21 11:31:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 11:31:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-09-21 11:31:13,465 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-09-21 11:31:13,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:13,466 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-09-21 11:31:13,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:31:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-09-21 11:31:13,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 11:31:13,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:13,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:13,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:31:13,468 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:13,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:13,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-09-21 11:31:13,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:13,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055578907] [2020-09-21 11:31:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,615 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,615 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,616 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,616 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:31:13,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-09-21 11:31:13,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:31:13,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:13,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:31:13,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:13,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,817 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,818 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,818 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,818 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:13,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:13,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:13,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:13,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:13,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:13,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055578907] [2020-09-21 11:31:13,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:13,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:31:13,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801513545] [2020-09-21 11:31:13,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:31:13,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:13,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:31:13,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:31:13,830 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-09-21 11:31:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:13,961 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-09-21 11:31:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:31:13,961 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-09-21 11:31:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:13,965 INFO L225 Difference]: With dead ends: 33 [2020-09-21 11:31:13,965 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 11:31:13,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:31:13,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 11:31:13,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-09-21 11:31:13,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-21 11:31:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-09-21 11:31:13,974 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-09-21 11:31:13,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:13,975 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-09-21 11:31:13,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:31:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-09-21 11:31:13,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 11:31:13,976 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:13,977 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:13,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:31:13,977 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:13,978 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-09-21 11:31:13,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:13,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843289662] [2020-09-21 11:31:13,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,994 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,994 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,995 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,995 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:31:13,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:31:13,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:13,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:13,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 11:31:13,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:14,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,015 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,016 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,016 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,016 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:14,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:14,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:14,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:14,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 11:31:14,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843289662] [2020-09-21 11:31:14,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:14,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:31:14,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536065232] [2020-09-21 11:31:14,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:31:14,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:14,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:31:14,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:31:14,040 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-09-21 11:31:14,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:14,072 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-09-21 11:31:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:31:14,073 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-09-21 11:31:14,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:14,073 INFO L225 Difference]: With dead ends: 32 [2020-09-21 11:31:14,073 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 11:31:14,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:31:14,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 11:31:14,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-09-21 11:31:14,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-21 11:31:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-09-21 11:31:14,079 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-09-21 11:31:14,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:14,080 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-09-21 11:31:14,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:31:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-09-21 11:31:14,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 11:31:14,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:14,081 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:14,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:31:14,081 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:14,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:14,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-09-21 11:31:14,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:14,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120980493] [2020-09-21 11:31:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,110 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,110 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,110 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,110 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:31:14,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:31:14,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:14,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:14,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:31:14,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:14,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,150 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,150 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,150 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,151 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:14,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:14,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:14,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:14,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:14,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:14,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120980493] [2020-09-21 11:31:14,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:14,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:31:14,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019861639] [2020-09-21 11:31:14,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:31:14,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:14,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:31:14,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:14,157 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-09-21 11:31:14,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:14,193 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-09-21 11:31:14,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:31:14,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-21 11:31:14,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:14,194 INFO L225 Difference]: With dead ends: 30 [2020-09-21 11:31:14,194 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 11:31:14,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:14,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 11:31:14,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-09-21 11:31:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 11:31:14,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-21 11:31:14,200 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-09-21 11:31:14,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:14,200 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-21 11:31:14,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:31:14,201 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-21 11:31:14,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 11:31:14,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:14,202 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:14,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:31:14,202 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:14,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:14,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-09-21 11:31:14,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:14,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804393063] [2020-09-21 11:31:14,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,283 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,283 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,283 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,284 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:31:14,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-21 11:31:14,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:31:14,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:14,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:31:14,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:14,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,507 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,508 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,509 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,509 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:14,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:14,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:14,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:14,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:14,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:31:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:31:14,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804393063] [2020-09-21 11:31:14,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:14,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:31:14,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502675572] [2020-09-21 11:31:14,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:31:14,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:14,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:31:14,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:31:14,525 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-09-21 11:31:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:14,710 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-09-21 11:31:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:31:14,710 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-09-21 11:31:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:14,711 INFO L225 Difference]: With dead ends: 31 [2020-09-21 11:31:14,711 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 11:31:14,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:31:14,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 11:31:14,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-09-21 11:31:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 11:31:14,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-21 11:31:14,718 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-09-21 11:31:14,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:14,718 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-21 11:31:14,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:31:14,718 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-21 11:31:14,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:31:14,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:14,719 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:14,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:31:14,720 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:14,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:14,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-09-21 11:31:14,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:14,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205037118] [2020-09-21 11:31:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,747 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,747 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,748 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,748 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:31:14,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:31:14,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:31:14,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:14,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:31:14,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:14,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,798 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,798 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,798 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,799 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:14,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:14,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:14,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:14,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:14,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:14,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205037118] [2020-09-21 11:31:14,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:14,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:31:14,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053126948] [2020-09-21 11:31:14,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:31:14,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:14,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:31:14,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:14,805 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-09-21 11:31:14,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:14,852 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-09-21 11:31:14,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:31:14,852 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-21 11:31:14,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:14,853 INFO L225 Difference]: With dead ends: 38 [2020-09-21 11:31:14,853 INFO L226 Difference]: Without dead ends: 29 [2020-09-21 11:31:14,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:14,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-21 11:31:14,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-09-21 11:31:14,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 11:31:14,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-21 11:31:14,860 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-09-21 11:31:14,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:14,860 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-21 11:31:14,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:31:14,861 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-21 11:31:14,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:31:14,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:14,862 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:14,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:31:14,862 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:14,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:14,862 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-09-21 11:31:14,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:14,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448060544] [2020-09-21 11:31:14,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,898 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,898 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,898 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,898 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 11:31:14,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 11:31:14,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:31:14,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:14,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:31:14,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:14,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:14,980 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:14,980 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:14,981 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:14,981 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:14,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:14,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:14,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:14,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:14,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:14,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:14,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:14,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:14,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448060544] [2020-09-21 11:31:14,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:14,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:31:14,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687599574] [2020-09-21 11:31:14,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:31:14,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:14,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:31:14,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:31:14,990 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-09-21 11:31:15,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:15,065 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-09-21 11:31:15,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:31:15,066 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-09-21 11:31:15,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:15,067 INFO L225 Difference]: With dead ends: 42 [2020-09-21 11:31:15,067 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 11:31:15,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:31:15,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 11:31:15,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-21 11:31:15,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 11:31:15,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-21 11:31:15,074 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-09-21 11:31:15,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:15,074 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-21 11:31:15,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:31:15,075 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-21 11:31:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 11:31:15,076 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:15,076 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:15,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:31:15,077 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:15,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-09-21 11:31:15,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:15,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229392605] [2020-09-21 11:31:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:15,119 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:15,120 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:15,120 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:15,120 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:15,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 11:31:15,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:15,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 11:31:15,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:15,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:31:15,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:15,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-21 11:31:15,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-21 11:31:15,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:15,259 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:15,260 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:15,260 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:15,260 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:15,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:15,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:15,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:15,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:15,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:15,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:15,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:15,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:15,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229392605] [2020-09-21 11:31:15,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:15,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:31:15,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402934743] [2020-09-21 11:31:15,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:31:15,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:15,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:31:15,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:31:15,277 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-09-21 11:31:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:15,372 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-09-21 11:31:15,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:31:15,374 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-09-21 11:31:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:15,374 INFO L225 Difference]: With dead ends: 46 [2020-09-21 11:31:15,375 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 11:31:15,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:31:15,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 11:31:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-09-21 11:31:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 11:31:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-21 11:31:15,385 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-09-21 11:31:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:15,386 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-21 11:31:15,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:31:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-21 11:31:15,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 11:31:15,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:15,387 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:15,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:31:15,388 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:15,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:15,388 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-09-21 11:31:15,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:15,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604342789] [2020-09-21 11:31:15,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:31:15,405 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:31:15,406 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:31:15,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:31:15,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:31:15 BoogieIcfgContainer [2020-09-21 11:31:15,433 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:31:15,437 INFO L168 Benchmark]: Toolchain (without parser) took 3420.66 ms. Allocated memory was 141.0 MB in the beginning and 243.8 MB in the end (delta: 102.8 MB). Free memory was 103.4 MB in the beginning and 188.1 MB in the end (delta: -84.7 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:15,437 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:31:15,438 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.29 ms. Allocated memory is still 141.0 MB. Free memory was 102.8 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:15,439 INFO L168 Benchmark]: Boogie Preprocessor took 108.83 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 184.5 MB in the end (delta: -91.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:15,440 INFO L168 Benchmark]: RCFGBuilder took 311.76 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 171.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:15,440 INFO L168 Benchmark]: TraceAbstraction took 2695.38 ms. Allocated memory was 204.5 MB in the beginning and 243.8 MB in the end (delta: 39.3 MB). Free memory was 170.7 MB in the beginning and 188.1 MB in the end (delta: -17.5 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:15,444 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.29 ms. Allocated memory is still 141.0 MB. Free memory was 102.8 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.83 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 184.5 MB in the end (delta: -91.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 311.76 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 171.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2695.38 ms. Allocated memory was 204.5 MB in the beginning and 243.8 MB in the end (delta: 39.3 MB). Free memory was 170.7 MB in the beginning and 188.1 MB in the end (delta: -17.5 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i