/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:30:56,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 19:30:56,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 19:30:56,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 19:30:56,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 19:30:56,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 19:30:56,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 19:30:56,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 19:30:56,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 19:30:56,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 19:30:56,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 19:30:56,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-08-18 19:30:56,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:30:56,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:30:56,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:30:56,749 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 [2020-08-18 19:30:56,794 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:30:56,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:30:56,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:30:56,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:30:56,797 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:30:56,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:30:56,798 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:30:56,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:30:56,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:30:56,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:30:56,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:30:56,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:30:56,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:30:56,800 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:30:56,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:30:56,800 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:30:56,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:30:56,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:30:56,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:30:56,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:30:56,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:30:56,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:30:56,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:30:56,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:30:56,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:30:56,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:30:56,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:30:56,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:30:56,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:30:56,805 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=5;interpolation-heuristic=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:30:57,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:30:57,151 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:30:57,159 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:30:57,161 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:30:57,162 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:30:57,163 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-18 19:30:57,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13c0125de/21b6bf2b1f4946bf937f477870586b26/FLAGe0d769ae2 [2020-08-18 19:30:57,683 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:30:57,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-18 19:30:57,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13c0125de/21b6bf2b1f4946bf937f477870586b26/FLAGe0d769ae2 [2020-08-18 19:30:58,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13c0125de/21b6bf2b1f4946bf937f477870586b26 [2020-08-18 19:30:58,056 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:30:58,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:30:58,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:30:58,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:30:58,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:30:58,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:30:58" (1/1) ... [2020-08-18 19:30:58,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e0aabd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:58, skipping insertion in model container [2020-08-18 19:30:58,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:30:58" (1/1) ... [2020-08-18 19:30:58,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:30:58,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:30:58,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:30:58,275 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:30:58,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:30:58,399 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:30:58,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:58 WrapperNode [2020-08-18 19:30:58,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:30:58,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:30:58,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:30:58,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:30:58,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:58" (1/1) ... [2020-08-18 19:30:58,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:58" (1/1) ... [2020-08-18 19:30:58,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:58" (1/1) ... [2020-08-18 19:30:58,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:58" (1/1) ... [2020-08-18 19:30:58,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:58" (1/1) ... [2020-08-18 19:30:58,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:58" (1/1) ... [2020-08-18 19:30:58,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:58" (1/1) ... [2020-08-18 19:30:58,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:30:58,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:30:58,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:30:58,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:30:58,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:58" (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 [2020-08-18 19:30:58,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:30:58,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:30:58,525 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-18 19:30:58,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:30:58,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:30:58,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 19:30:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 19:30:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 19:30:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:30:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 19:30:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 19:30:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 19:30:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:30:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:30:58,790 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:30:58,790 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 19:30:58,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:30:58 BoogieIcfgContainer [2020-08-18 19:30:58,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:30:58,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:30:58,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:30:58,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:30:58,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:30:58" (1/3) ... [2020-08-18 19:30:58,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d3a9ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:30:58, skipping insertion in model container [2020-08-18 19:30:58,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:58" (2/3) ... [2020-08-18 19:30:58,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d3a9ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:30:58, skipping insertion in model container [2020-08-18 19:30:58,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:30:58" (3/3) ... [2020-08-18 19:30:58,808 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-08-18 19:30:58,822 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:30:58,833 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:30:58,853 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:30:58,882 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:30:58,883 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:30:58,883 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:30:58,883 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:30:58,883 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:30:58,883 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:30:58,884 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:30:58,884 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:30:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-18 19:30:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 19:30:58,910 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:58,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:58,914 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:58,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:58,921 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-08-18 19:30:58,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:58,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878100127] [2020-08-18 19:30:58,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:59,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:59,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 19:30:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:59,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878100127] [2020-08-18 19:30:59,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:59,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:59,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166200458] [2020-08-18 19:30:59,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:59,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:59,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:59,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:59,159 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-08-18 19:30:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:59,253 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-08-18 19:30:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:59,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 19:30:59,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:59,265 INFO L225 Difference]: With dead ends: 42 [2020-08-18 19:30:59,266 INFO L226 Difference]: Without dead ends: 20 [2020-08-18 19:30:59,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:59,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-18 19:30:59,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-08-18 19:30:59,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 19:30:59,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-18 19:30:59,308 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-08-18 19:30:59,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:59,309 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-18 19:30:59,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:59,309 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-18 19:30:59,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 19:30:59,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:59,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:59,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:30:59,311 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:59,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:59,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-08-18 19:30:59,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:59,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160060063] [2020-08-18 19:30:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:59,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:59,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 19:30:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:59,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160060063] [2020-08-18 19:30:59,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:59,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 19:30:59,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359906966] [2020-08-18 19:30:59,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 19:30:59,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:59,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 19:30:59,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 19:30:59,421 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-08-18 19:30:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:59,491 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-08-18 19:30:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 19:30:59,492 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-08-18 19:30:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:59,493 INFO L225 Difference]: With dead ends: 34 [2020-08-18 19:30:59,493 INFO L226 Difference]: Without dead ends: 22 [2020-08-18 19:30:59,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 19:30:59,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-18 19:30:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-18 19:30:59,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 19:30:59,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 19:30:59,502 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-08-18 19:30:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:59,503 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 19:30:59,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 19:30:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 19:30:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 19:30:59,504 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:59,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:59,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:30:59,505 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:59,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:59,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-08-18 19:30:59,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:59,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616415004] [2020-08-18 19:30:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:59,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:59,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 19:30:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:59,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616415004] [2020-08-18 19:30:59,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:30:59,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 19:30:59,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30839477] [2020-08-18 19:30:59,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 19:30:59,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:59,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 19:30:59,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:30:59,607 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-08-18 19:30:59,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:59,680 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-08-18 19:30:59,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 19:30:59,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 19:30:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:59,682 INFO L225 Difference]: With dead ends: 36 [2020-08-18 19:30:59,682 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 19:30:59,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:30:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 19:30:59,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-18 19:30:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 19:30:59,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-08-18 19:30:59,689 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-08-18 19:30:59,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:59,689 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-08-18 19:30:59,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 19:30:59,690 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-08-18 19:30:59,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 19:30:59,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:59,691 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:59,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 19:30:59,691 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:59,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:59,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1739404943, now seen corresponding path program 2 times [2020-08-18 19:30:59,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:59,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850968620] [2020-08-18 19:30:59,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:59,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:59,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 19:30:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:59,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850968620] [2020-08-18 19:30:59,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:30:59,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 19:30:59,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132279323] [2020-08-18 19:30:59,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 19:30:59,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:59,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 19:30:59,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 19:30:59,786 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-08-18 19:30:59,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:59,860 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-08-18 19:30:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 19:30:59,860 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-18 19:30:59,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:59,862 INFO L225 Difference]: With dead ends: 38 [2020-08-18 19:30:59,862 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 19:30:59,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 19:30:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 19:30:59,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-18 19:30:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-18 19:30:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-18 19:30:59,870 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-08-18 19:30:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:59,870 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-18 19:30:59,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 19:30:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-18 19:30:59,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 19:30:59,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:59,872 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:59,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 19:30:59,873 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:59,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:59,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1328015311, now seen corresponding path program 3 times [2020-08-18 19:30:59,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:59,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966915447] [2020-08-18 19:30:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:00,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:00,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 19:31:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:00,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966915447] [2020-08-18 19:31:00,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:00,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 19:31:00,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533088371] [2020-08-18 19:31:00,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 19:31:00,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:00,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 19:31:00,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 19:31:00,056 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-08-18 19:31:00,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:00,140 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-08-18 19:31:00,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 19:31:00,141 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-18 19:31:00,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:00,142 INFO L225 Difference]: With dead ends: 40 [2020-08-18 19:31:00,142 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 19:31:00,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 19:31:00,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 19:31:00,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-18 19:31:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 19:31:00,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 19:31:00,149 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-08-18 19:31:00,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:00,150 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 19:31:00,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 19:31:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 19:31:00,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 19:31:00,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:00,151 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:00,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 19:31:00,152 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:00,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:00,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 4 times [2020-08-18 19:31:00,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:00,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655144586] [2020-08-18 19:31:00,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:00,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:00,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 19:31:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:00,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655144586] [2020-08-18 19:31:00,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:00,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 19:31:00,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255734462] [2020-08-18 19:31:00,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 19:31:00,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:00,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 19:31:00,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-18 19:31:00,273 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-08-18 19:31:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:00,340 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-08-18 19:31:00,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 19:31:00,340 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-18 19:31:00,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:00,341 INFO L225 Difference]: With dead ends: 42 [2020-08-18 19:31:00,342 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 19:31:00,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-18 19:31:00,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 19:31:00,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-18 19:31:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 19:31:00,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-08-18 19:31:00,348 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-08-18 19:31:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:00,348 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-08-18 19:31:00,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 19:31:00,348 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-08-18 19:31:00,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 19:31:00,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:00,350 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:00,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 19:31:00,350 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:00,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:00,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1787714037, now seen corresponding path program 5 times [2020-08-18 19:31:00,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:00,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332875483] [2020-08-18 19:31:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:00,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:00,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 19:31:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:00,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332875483] [2020-08-18 19:31:00,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:00,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 19:31:00,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248090275] [2020-08-18 19:31:00,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 19:31:00,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:00,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 19:31:00,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-18 19:31:00,453 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2020-08-18 19:31:00,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:00,526 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-08-18 19:31:00,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 19:31:00,527 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-18 19:31:00,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:00,528 INFO L225 Difference]: With dead ends: 44 [2020-08-18 19:31:00,528 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 19:31:00,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-18 19:31:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 19:31:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-18 19:31:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 19:31:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-18 19:31:00,535 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-08-18 19:31:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:00,535 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-18 19:31:00,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 19:31:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-18 19:31:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 19:31:00,536 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:00,536 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:00,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 19:31:00,537 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:00,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2147351063, now seen corresponding path program 6 times [2020-08-18 19:31:00,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:00,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248621109] [2020-08-18 19:31:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:00,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:00,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 19:31:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:00,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248621109] [2020-08-18 19:31:00,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:00,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 19:31:00,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691008158] [2020-08-18 19:31:00,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 19:31:00,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:00,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 19:31:00,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-18 19:31:00,638 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 10 states. [2020-08-18 19:31:00,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:00,703 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-08-18 19:31:00,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 19:31:00,703 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-08-18 19:31:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:00,704 INFO L225 Difference]: With dead ends: 46 [2020-08-18 19:31:00,704 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 19:31:00,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-18 19:31:00,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 19:31:00,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-18 19:31:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 19:31:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 19:31:00,711 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-08-18 19:31:00,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:00,711 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 19:31:00,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 19:31:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 19:31:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 19:31:00,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:00,712 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:00,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 19:31:00,713 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:00,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:00,713 INFO L82 PathProgramCache]: Analyzing trace with hash -133817927, now seen corresponding path program 7 times [2020-08-18 19:31:00,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:00,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75651357] [2020-08-18 19:31:00,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:00,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:00,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 19:31:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:00,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75651357] [2020-08-18 19:31:00,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:00,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 19:31:00,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320012991] [2020-08-18 19:31:00,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 19:31:00,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:00,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 19:31:00,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-18 19:31:00,822 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-18 19:31:00,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:00,902 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-08-18 19:31:00,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 19:31:00,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-08-18 19:31:00,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:00,903 INFO L225 Difference]: With dead ends: 48 [2020-08-18 19:31:00,904 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 19:31:00,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-18 19:31:00,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 19:31:00,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-18 19:31:00,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-18 19:31:00,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-08-18 19:31:00,910 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-08-18 19:31:00,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:00,911 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-08-18 19:31:00,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 19:31:00,911 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-08-18 19:31:00,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 19:31:00,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:00,912 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:00,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 19:31:00,913 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:00,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1903896357, now seen corresponding path program 8 times [2020-08-18 19:31:00,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:00,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506160446] [2020-08-18 19:31:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:01,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:01,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 19:31:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:01,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506160446] [2020-08-18 19:31:01,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:01,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 19:31:01,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878089178] [2020-08-18 19:31:01,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 19:31:01,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:01,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 19:31:01,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-18 19:31:01,086 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2020-08-18 19:31:01,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:01,155 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-08-18 19:31:01,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 19:31:01,156 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-08-18 19:31:01,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:01,157 INFO L225 Difference]: With dead ends: 50 [2020-08-18 19:31:01,157 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 19:31:01,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-18 19:31:01,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 19:31:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-18 19:31:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 19:31:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-08-18 19:31:01,163 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-08-18 19:31:01,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:01,163 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-08-18 19:31:01,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 19:31:01,164 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-08-18 19:31:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-18 19:31:01,164 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:01,165 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:01,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 19:31:01,165 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:01,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2142218371, now seen corresponding path program 9 times [2020-08-18 19:31:01,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:01,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863614195] [2020-08-18 19:31:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:01,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:01,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 19:31:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:01,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863614195] [2020-08-18 19:31:01,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:01,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 19:31:01,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627030341] [2020-08-18 19:31:01,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 19:31:01,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:01,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 19:31:01,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-18 19:31:01,310 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 13 states. [2020-08-18 19:31:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:01,388 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-08-18 19:31:01,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 19:31:01,389 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-18 19:31:01,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:01,390 INFO L225 Difference]: With dead ends: 52 [2020-08-18 19:31:01,390 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 19:31:01,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-18 19:31:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 19:31:01,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-18 19:31:01,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 19:31:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 19:31:01,395 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-08-18 19:31:01,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:01,396 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 19:31:01,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 19:31:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 19:31:01,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 19:31:01,397 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:01,397 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:01,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 19:31:01,398 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:01,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:01,398 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 10 times [2020-08-18 19:31:01,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:01,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611965641] [2020-08-18 19:31:01,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:01,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:01,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 19:31:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:01,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611965641] [2020-08-18 19:31:01,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:01,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 19:31:01,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901434592] [2020-08-18 19:31:01,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 19:31:01,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:01,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 19:31:01,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-18 19:31:01,540 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-08-18 19:31:01,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:01,631 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-08-18 19:31:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 19:31:01,632 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-18 19:31:01,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:01,632 INFO L225 Difference]: With dead ends: 54 [2020-08-18 19:31:01,633 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 19:31:01,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-18 19:31:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 19:31:01,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-18 19:31:01,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-18 19:31:01,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-08-18 19:31:01,638 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-08-18 19:31:01,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:01,638 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-08-18 19:31:01,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 19:31:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-08-18 19:31:01,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 19:31:01,639 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:01,640 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:01,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 19:31:01,640 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:01,640 INFO L82 PathProgramCache]: Analyzing trace with hash 972952385, now seen corresponding path program 11 times [2020-08-18 19:31:01,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:01,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861316765] [2020-08-18 19:31:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:01,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:01,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 19:31:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:01,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861316765] [2020-08-18 19:31:01,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:01,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 19:31:01,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402573103] [2020-08-18 19:31:01,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 19:31:01,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:01,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 19:31:01,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-18 19:31:01,799 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-08-18 19:31:01,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:01,887 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-08-18 19:31:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 19:31:01,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-08-18 19:31:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:01,888 INFO L225 Difference]: With dead ends: 56 [2020-08-18 19:31:01,889 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 19:31:01,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-18 19:31:01,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 19:31:01,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-18 19:31:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 19:31:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-18 19:31:01,895 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-08-18 19:31:01,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:01,895 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-18 19:31:01,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 19:31:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-18 19:31:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-18 19:31:01,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:01,897 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:01,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 19:31:01,897 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:01,898 INFO L82 PathProgramCache]: Analyzing trace with hash 845451363, now seen corresponding path program 12 times [2020-08-18 19:31:01,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:01,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559527077] [2020-08-18 19:31:01,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:02,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:02,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 19:31:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:02,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559527077] [2020-08-18 19:31:02,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:02,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 19:31:02,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475833355] [2020-08-18 19:31:02,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 19:31:02,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:02,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 19:31:02,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-18 19:31:02,114 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 16 states. [2020-08-18 19:31:02,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:02,197 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-08-18 19:31:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 19:31:02,197 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-08-18 19:31:02,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:02,198 INFO L225 Difference]: With dead ends: 58 [2020-08-18 19:31:02,199 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 19:31:02,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-18 19:31:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 19:31:02,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-18 19:31:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 19:31:02,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 19:31:02,208 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-08-18 19:31:02,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:02,209 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 19:31:02,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 19:31:02,209 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 19:31:02,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-18 19:31:02,212 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:02,212 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:02,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 19:31:02,213 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:02,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1423946491, now seen corresponding path program 13 times [2020-08-18 19:31:02,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:02,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426114822] [2020-08-18 19:31:02,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:02,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:02,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 19:31:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:02,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426114822] [2020-08-18 19:31:02,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:02,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 19:31:02,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921978950] [2020-08-18 19:31:02,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 19:31:02,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:02,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 19:31:02,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-18 19:31:02,418 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-08-18 19:31:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:02,529 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-08-18 19:31:02,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 19:31:02,529 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-08-18 19:31:02,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:02,530 INFO L225 Difference]: With dead ends: 60 [2020-08-18 19:31:02,530 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 19:31:02,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-18 19:31:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 19:31:02,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-08-18 19:31:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-18 19:31:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-08-18 19:31:02,536 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-08-18 19:31:02,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:02,536 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-08-18 19:31:02,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 19:31:02,536 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-08-18 19:31:02,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 19:31:02,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:02,537 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:02,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 19:31:02,537 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:02,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:02,538 INFO L82 PathProgramCache]: Analyzing trace with hash -471897817, now seen corresponding path program 14 times [2020-08-18 19:31:02,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:02,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517381515] [2020-08-18 19:31:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:02,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:02,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 19:31:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:02,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517381515] [2020-08-18 19:31:02,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:02,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 19:31:02,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970014017] [2020-08-18 19:31:02,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 19:31:02,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:02,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 19:31:02,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-18 19:31:02,742 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-08-18 19:31:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:02,846 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-08-18 19:31:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 19:31:02,847 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-08-18 19:31:02,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:02,848 INFO L225 Difference]: With dead ends: 62 [2020-08-18 19:31:02,848 INFO L226 Difference]: Without dead ends: 50 [2020-08-18 19:31:02,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-18 19:31:02,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-18 19:31:02,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-08-18 19:31:02,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-18 19:31:02,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-08-18 19:31:02,853 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-08-18 19:31:02,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:02,854 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-08-18 19:31:02,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 19:31:02,854 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-08-18 19:31:02,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 19:31:02,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:02,855 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:02,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 19:31:02,855 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:02,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:02,856 INFO L82 PathProgramCache]: Analyzing trace with hash -381156151, now seen corresponding path program 15 times [2020-08-18 19:31:02,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:02,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708024437] [2020-08-18 19:31:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:03,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:03,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 19:31:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:03,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708024437] [2020-08-18 19:31:03,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:03,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 19:31:03,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932838819] [2020-08-18 19:31:03,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 19:31:03,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:03,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 19:31:03,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-18 19:31:03,065 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 19 states. [2020-08-18 19:31:03,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:03,163 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-08-18 19:31:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 19:31:03,163 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-08-18 19:31:03,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:03,164 INFO L225 Difference]: With dead ends: 64 [2020-08-18 19:31:03,164 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 19:31:03,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-18 19:31:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 19:31:03,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-18 19:31:03,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 19:31:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 19:31:03,174 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-08-18 19:31:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:03,174 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 19:31:03,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 19:31:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 19:31:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-18 19:31:03,175 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:03,175 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:03,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 19:31:03,176 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:03,176 INFO L82 PathProgramCache]: Analyzing trace with hash 922238955, now seen corresponding path program 16 times [2020-08-18 19:31:03,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:03,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368472764] [2020-08-18 19:31:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:03,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:03,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 19:31:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:03,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368472764] [2020-08-18 19:31:03,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:03,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 19:31:03,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812850247] [2020-08-18 19:31:03,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 19:31:03,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:03,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 19:31:03,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-18 19:31:03,455 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2020-08-18 19:31:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:03,545 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-08-18 19:31:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 19:31:03,545 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-08-18 19:31:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:03,546 INFO L225 Difference]: With dead ends: 66 [2020-08-18 19:31:03,546 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 19:31:03,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-18 19:31:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 19:31:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-18 19:31:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-18 19:31:03,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-08-18 19:31:03,559 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-08-18 19:31:03,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:03,559 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-08-18 19:31:03,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 19:31:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-08-18 19:31:03,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 19:31:03,560 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:03,560 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:03,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 19:31:03,561 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:03,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:03,562 INFO L82 PathProgramCache]: Analyzing trace with hash -645514611, now seen corresponding path program 17 times [2020-08-18 19:31:03,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:03,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48152603] [2020-08-18 19:31:03,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:03,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:03,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 19:31:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:03,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48152603] [2020-08-18 19:31:03,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:03,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 19:31:03,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713879364] [2020-08-18 19:31:03,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 19:31:03,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:03,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 19:31:03,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-18 19:31:03,863 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2020-08-18 19:31:03,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:03,992 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-08-18 19:31:03,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 19:31:03,992 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-08-18 19:31:03,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:03,993 INFO L225 Difference]: With dead ends: 68 [2020-08-18 19:31:03,993 INFO L226 Difference]: Without dead ends: 56 [2020-08-18 19:31:03,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-18 19:31:03,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-18 19:31:03,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-18 19:31:03,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 19:31:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-08-18 19:31:03,998 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-08-18 19:31:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:03,998 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-08-18 19:31:03,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 19:31:03,999 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-08-18 19:31:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 19:31:03,999 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:03,999 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:04,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 19:31:04,000 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:04,000 INFO L82 PathProgramCache]: Analyzing trace with hash 276829359, now seen corresponding path program 18 times [2020-08-18 19:31:04,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:04,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271556054] [2020-08-18 19:31:04,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:04,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:04,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 19:31:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:04,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271556054] [2020-08-18 19:31:04,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:04,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 19:31:04,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17520279] [2020-08-18 19:31:04,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 19:31:04,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:04,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 19:31:04,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-18 19:31:04,283 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 22 states. [2020-08-18 19:31:04,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:04,365 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-08-18 19:31:04,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 19:31:04,366 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-08-18 19:31:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:04,366 INFO L225 Difference]: With dead ends: 70 [2020-08-18 19:31:04,367 INFO L226 Difference]: Without dead ends: 58 [2020-08-18 19:31:04,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-18 19:31:04,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-18 19:31:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-18 19:31:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 19:31:04,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 19:31:04,370 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-08-18 19:31:04,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:04,371 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 19:31:04,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 19:31:04,371 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 19:31:04,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 19:31:04,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:04,372 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:04,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 19:31:04,372 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:04,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:04,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1886121553, now seen corresponding path program 19 times [2020-08-18 19:31:04,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:04,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622607581] [2020-08-18 19:31:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:04,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:04,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 19:31:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:04,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622607581] [2020-08-18 19:31:04,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:04,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 19:31:04,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942888889] [2020-08-18 19:31:04,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 19:31:04,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:04,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 19:31:04,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-18 19:31:04,662 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 23 states. [2020-08-18 19:31:04,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:04,784 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-08-18 19:31:04,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 19:31:04,785 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-08-18 19:31:04,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:04,785 INFO L225 Difference]: With dead ends: 71 [2020-08-18 19:31:04,786 INFO L226 Difference]: Without dead ends: 59 [2020-08-18 19:31:04,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-18 19:31:04,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-18 19:31:04,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-08-18 19:31:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-18 19:31:04,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-08-18 19:31:04,804 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-08-18 19:31:04,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:04,805 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-08-18 19:31:04,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 19:31:04,805 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-08-18 19:31:04,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 19:31:04,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:04,806 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:04,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 19:31:04,806 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:04,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:04,807 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 20 times [2020-08-18 19:31:04,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:04,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416953503] [2020-08-18 19:31:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 19:31:04,897 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 19:31:04,897 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 19:31:04,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 19:31:04,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 07:31:04 BoogieIcfgContainer [2020-08-18 19:31:04,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 19:31:04,926 INFO L168 Benchmark]: Toolchain (without parser) took 6868.34 ms. Allocated memory was 137.4 MB in the beginning and 323.5 MB in the end (delta: 186.1 MB). Free memory was 100.5 MB in the beginning and 277.7 MB in the end (delta: -177.1 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-08-18 19:31:04,927 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 19:31:04,927 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.46 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 100.3 MB in the beginning and 178.6 MB in the end (delta: -78.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-08-18 19:31:04,928 INFO L168 Benchmark]: Boogie Preprocessor took 45.37 ms. Allocated memory is still 199.8 MB. Free memory was 178.6 MB in the beginning and 176.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-08-18 19:31:04,928 INFO L168 Benchmark]: RCFGBuilder took 348.74 ms. Allocated memory is still 199.8 MB. Free memory was 176.0 MB in the beginning and 160.7 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-08-18 19:31:04,929 INFO L168 Benchmark]: TraceAbstraction took 6126.52 ms. Allocated memory was 199.8 MB in the beginning and 323.5 MB in the end (delta: 123.7 MB). Free memory was 160.0 MB in the beginning and 277.7 MB in the end (delta: -117.7 MB). Peak memory consumption was 6.1 MB. Max. memory is 7.1 GB. [2020-08-18 19:31:04,931 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 342.46 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 100.3 MB in the beginning and 178.6 MB in the end (delta: -78.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.37 ms. Allocated memory is still 199.8 MB. Free memory was 178.6 MB in the beginning and 176.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 348.74 ms. Allocated memory is still 199.8 MB. Free memory was 176.0 MB in the beginning and 160.7 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6126.52 ms. Allocated memory was 199.8 MB in the beginning and 323.5 MB in the end (delta: 123.7 MB). Free memory was 160.0 MB in the beginning and 277.7 MB in the end (delta: -117.7 MB). Peak memory consumption was 6.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.0s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 365 SDtfs, 252 SDslu, 1934 SDs, 0 SdLazy, 1339 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 336 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=21, 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, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 815 NumberOfCodeBlocks, 815 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 736 ConstructedInterpolants, 0 QuantifiedInterpolants, 69580 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2470 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...