/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 05:26:00,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 05:26:00,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 05:26:00,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 05:26:00,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 05:26:00,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 05:26:00,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 05:26:00,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 05:26:00,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 05:26:00,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 05:26:00,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 05:26:00,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 05:26:00,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 05:26:00,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 05:26:00,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 05:26:00,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 05:26:00,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 05:26:00,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 05:26:00,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 05:26:00,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 05:26:00,526 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 05:26:00,575 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 05:26:00,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 05:26:00,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 05:26:00,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 05:26:00,577 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 05:26:00,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 05:26:00,578 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 05:26:00,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 05:26:00,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 05:26:00,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 05:26:00,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 05:26:00,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 05:26:00,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 05:26:00,579 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 05:26:00,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 05:26:00,579 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 05:26:00,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 05:26:00,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 05:26:00,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 05:26:00,581 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 05:26:00,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 05:26:00,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:26:00,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 05:26:00,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 05:26:00,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 05:26:00,582 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 05:26:00,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 05:26:00,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 05:26:00,583 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 05:26:00,583 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-08-22 05:26:00,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 05:26:00,962 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 05:26:00,968 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 05:26:00,970 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 05:26:00,970 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 05:26:00,971 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-08-22 05:26:01,040 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5304ed379/763effec181d48218011d9583780bafb/FLAGcba51c4c4 [2020-08-22 05:26:01,494 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 05:26:01,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-08-22 05:26:01,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5304ed379/763effec181d48218011d9583780bafb/FLAGcba51c4c4 [2020-08-22 05:26:01,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5304ed379/763effec181d48218011d9583780bafb [2020-08-22 05:26:01,913 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 05:26:01,915 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 05:26:01,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 05:26:01,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 05:26:01,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 05:26:01,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:26:01" (1/1) ... [2020-08-22 05:26:01,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277364e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:26:01, skipping insertion in model container [2020-08-22 05:26:01,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:26:01" (1/1) ... [2020-08-22 05:26:01,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 05:26:01,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 05:26:02,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:26:02,156 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 05:26:02,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:26:02,183 INFO L208 MainTranslator]: Completed translation [2020-08-22 05:26:02,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:26:02 WrapperNode [2020-08-22 05:26:02,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 05:26:02,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 05:26:02,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 05:26:02,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 05:26:02,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:26:02" (1/1) ... [2020-08-22 05:26:02,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:26:02" (1/1) ... [2020-08-22 05:26:02,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:26:02" (1/1) ... [2020-08-22 05:26:02,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:26:02" (1/1) ... [2020-08-22 05:26:02,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:26:02" (1/1) ... [2020-08-22 05:26:02,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:26:02" (1/1) ... [2020-08-22 05:26:02,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:26:02" (1/1) ... [2020-08-22 05:26:02,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 05:26:02,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 05:26:02,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 05:26:02,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 05:26:02,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:26:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:26:02,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 05:26:02,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 05:26:02,357 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-08-22 05:26:02,357 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 05:26:02,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 05:26:02,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 05:26:02,357 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-08-22 05:26:02,357 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 05:26:02,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 05:26:02,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 05:26:02,530 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 05:26:02,531 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 05:26:02,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:26:02 BoogieIcfgContainer [2020-08-22 05:26:02,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 05:26:02,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 05:26:02,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 05:26:02,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 05:26:02,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:26:01" (1/3) ... [2020-08-22 05:26:02,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542ebffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:26:02, skipping insertion in model container [2020-08-22 05:26:02,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:26:02" (2/3) ... [2020-08-22 05:26:02,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542ebffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:26:02, skipping insertion in model container [2020-08-22 05:26:02,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:26:02" (3/3) ... [2020-08-22 05:26:02,544 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-08-22 05:26:02,555 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 05:26:02,563 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 05:26:02,578 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 05:26:02,604 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 05:26:02,604 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 05:26:02,604 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 05:26:02,604 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 05:26:02,605 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 05:26:02,605 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 05:26:02,605 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 05:26:02,605 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 05:26:02,624 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-22 05:26:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 05:26:02,630 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:02,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:02,631 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:02,636 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2020-08-22 05:26:02,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:02,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402441419] [2020-08-22 05:26:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:02,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:02,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:26:02,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402441419] [2020-08-22 05:26:02,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:26:02,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 05:26:02,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101316185] [2020-08-22 05:26:02,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:26:02,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:02,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:26:02,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:26:02,983 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-08-22 05:26:03,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:03,109 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-22 05:26:03,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 05:26:03,111 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-22 05:26:03,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:03,122 INFO L225 Difference]: With dead ends: 33 [2020-08-22 05:26:03,123 INFO L226 Difference]: Without dead ends: 19 [2020-08-22 05:26:03,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 05:26:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-22 05:26:03,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-22 05:26:03,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-22 05:26:03,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-22 05:26:03,169 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-08-22 05:26:03,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:03,170 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-22 05:26:03,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:26:03,170 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-22 05:26:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 05:26:03,172 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:03,172 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:03,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 05:26:03,173 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:03,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2020-08-22 05:26:03,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:03,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506375127] [2020-08-22 05:26:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 05:26:03,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506375127] [2020-08-22 05:26:03,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:03,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 05:26:03,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313413212] [2020-08-22 05:26:03,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 05:26:03,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:03,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 05:26:03,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:26:03,355 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 8 states. [2020-08-22 05:26:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:03,501 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-08-22 05:26:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 05:26:03,502 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-22 05:26:03,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:03,503 INFO L225 Difference]: With dead ends: 26 [2020-08-22 05:26:03,503 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 05:26:03,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 05:26:03,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 05:26:03,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-22 05:26:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 05:26:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-08-22 05:26:03,512 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2020-08-22 05:26:03,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:03,512 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-08-22 05:26:03,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 05:26:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-08-22 05:26:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 05:26:03,514 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:03,514 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:03,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 05:26:03,515 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:03,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:03,515 INFO L82 PathProgramCache]: Analyzing trace with hash 293522751, now seen corresponding path program 2 times [2020-08-22 05:26:03,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:03,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433980591] [2020-08-22 05:26:03,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 05:26:03,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433980591] [2020-08-22 05:26:03,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:03,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 05:26:03,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743402635] [2020-08-22 05:26:03,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 05:26:03,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:03,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 05:26:03,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:26:03,732 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 10 states. [2020-08-22 05:26:03,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:03,904 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-08-22 05:26:03,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 05:26:03,905 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-08-22 05:26:03,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:03,906 INFO L225 Difference]: With dead ends: 29 [2020-08-22 05:26:03,907 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 05:26:03,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-08-22 05:26:03,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 05:26:03,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-22 05:26:03,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 05:26:03,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-22 05:26:03,914 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 26 [2020-08-22 05:26:03,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:03,915 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-22 05:26:03,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 05:26:03,915 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-22 05:26:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 05:26:03,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:03,917 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:03,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 05:26:03,917 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:03,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:03,918 INFO L82 PathProgramCache]: Analyzing trace with hash -547108535, now seen corresponding path program 3 times [2020-08-22 05:26:03,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:03,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897136349] [2020-08-22 05:26:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 05:26:04,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897136349] [2020-08-22 05:26:04,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:04,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 05:26:04,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378986711] [2020-08-22 05:26:04,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 05:26:04,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:04,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 05:26:04,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-22 05:26:04,153 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 12 states. [2020-08-22 05:26:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:04,356 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-08-22 05:26:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 05:26:04,356 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-22 05:26:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:04,358 INFO L225 Difference]: With dead ends: 32 [2020-08-22 05:26:04,358 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 05:26:04,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-08-22 05:26:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 05:26:04,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-22 05:26:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 05:26:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-08-22 05:26:04,366 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 32 [2020-08-22 05:26:04,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:04,367 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-08-22 05:26:04,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 05:26:04,367 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-08-22 05:26:04,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 05:26:04,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:04,369 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:04,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 05:26:04,370 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:04,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:04,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1152432193, now seen corresponding path program 4 times [2020-08-22 05:26:04,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:04,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929144685] [2020-08-22 05:26:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 05:26:04,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929144685] [2020-08-22 05:26:04,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:04,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 05:26:04,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999799051] [2020-08-22 05:26:04,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 05:26:04,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:04,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 05:26:04,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 05:26:04,643 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-08-22 05:26:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:04,970 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-08-22 05:26:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 05:26:04,971 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-22 05:26:04,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:04,972 INFO L225 Difference]: With dead ends: 35 [2020-08-22 05:26:04,972 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 05:26:04,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-08-22 05:26:04,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 05:26:04,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-22 05:26:04,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 05:26:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-22 05:26:04,988 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 38 [2020-08-22 05:26:04,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:04,989 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-22 05:26:04,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 05:26:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-22 05:26:04,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 05:26:04,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:04,993 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:04,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 05:26:04,994 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:04,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:04,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1461718089, now seen corresponding path program 5 times [2020-08-22 05:26:05,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:05,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146690689] [2020-08-22 05:26:05,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 05:26:05,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146690689] [2020-08-22 05:26:05,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:05,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 05:26:05,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38149390] [2020-08-22 05:26:05,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 05:26:05,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:05,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 05:26:05,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-22 05:26:05,395 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2020-08-22 05:26:05,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:05,787 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-08-22 05:26:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 05:26:05,788 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-08-22 05:26:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:05,790 INFO L225 Difference]: With dead ends: 38 [2020-08-22 05:26:05,791 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 05:26:05,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2020-08-22 05:26:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 05:26:05,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-08-22 05:26:05,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 05:26:05,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-08-22 05:26:05,808 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 44 [2020-08-22 05:26:05,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:05,808 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-08-22 05:26:05,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 05:26:05,809 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-08-22 05:26:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 05:26:05,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:05,814 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:05,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 05:26:05,814 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:05,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:05,816 INFO L82 PathProgramCache]: Analyzing trace with hash -269168065, now seen corresponding path program 6 times [2020-08-22 05:26:05,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:05,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339396793] [2020-08-22 05:26:05,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 05:26:06,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339396793] [2020-08-22 05:26:06,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:06,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 05:26:06,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128230764] [2020-08-22 05:26:06,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 05:26:06,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:06,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 05:26:06,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-08-22 05:26:06,197 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states. [2020-08-22 05:26:06,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:06,621 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-08-22 05:26:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 05:26:06,621 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-22 05:26:06,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:06,622 INFO L225 Difference]: With dead ends: 41 [2020-08-22 05:26:06,623 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 05:26:06,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-08-22 05:26:06,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 05:26:06,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-22 05:26:06,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 05:26:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-08-22 05:26:06,629 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 50 [2020-08-22 05:26:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:06,630 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-08-22 05:26:06,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 05:26:06,630 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-08-22 05:26:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 05:26:06,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:06,632 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:06,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 05:26:06,632 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:06,632 INFO L82 PathProgramCache]: Analyzing trace with hash 585432905, now seen corresponding path program 7 times [2020-08-22 05:26:06,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:06,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645797753] [2020-08-22 05:26:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 05:26:07,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645797753] [2020-08-22 05:26:07,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:07,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 05:26:07,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534842515] [2020-08-22 05:26:07,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 05:26:07,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:07,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 05:26:07,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-22 05:26:07,070 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 20 states. [2020-08-22 05:26:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:07,643 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-08-22 05:26:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 05:26:07,643 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-08-22 05:26:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:07,645 INFO L225 Difference]: With dead ends: 44 [2020-08-22 05:26:07,645 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 05:26:07,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 05:26:07,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 05:26:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-22 05:26:07,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 05:26:07,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-08-22 05:26:07,654 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 56 [2020-08-22 05:26:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:07,655 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-08-22 05:26:07,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 05:26:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-08-22 05:26:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 05:26:07,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:07,657 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:07,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 05:26:07,657 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:07,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:07,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1316711615, now seen corresponding path program 8 times [2020-08-22 05:26:07,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:07,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320597146] [2020-08-22 05:26:07,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:08,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:08,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:08,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 05:26:08,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320597146] [2020-08-22 05:26:08,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:08,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 05:26:08,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622953932] [2020-08-22 05:26:08,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 05:26:08,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:08,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 05:26:08,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-08-22 05:26:08,224 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 22 states. [2020-08-22 05:26:08,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:08,891 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2020-08-22 05:26:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 05:26:08,892 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2020-08-22 05:26:08,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:08,893 INFO L225 Difference]: With dead ends: 47 [2020-08-22 05:26:08,893 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 05:26:08,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 05:26:08,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 05:26:08,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-22 05:26:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 05:26:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-22 05:26:08,910 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 62 [2020-08-22 05:26:08,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:08,910 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-22 05:26:08,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 05:26:08,910 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-22 05:26:08,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 05:26:08,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:08,913 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:08,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 05:26:08,913 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:08,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:08,917 INFO L82 PathProgramCache]: Analyzing trace with hash 579248713, now seen corresponding path program 9 times [2020-08-22 05:26:08,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:08,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44879310] [2020-08-22 05:26:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:08,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:08,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 05:26:09,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44879310] [2020-08-22 05:26:09,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:09,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 05:26:09,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706976715] [2020-08-22 05:26:09,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 05:26:09,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:09,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 05:26:09,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-08-22 05:26:09,469 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 24 states. [2020-08-22 05:26:10,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:10,276 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-08-22 05:26:10,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 05:26:10,276 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2020-08-22 05:26:10,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:10,278 INFO L225 Difference]: With dead ends: 50 [2020-08-22 05:26:10,278 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 05:26:10,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=1685, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 05:26:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 05:26:10,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-08-22 05:26:10,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 05:26:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-08-22 05:26:10,286 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 68 [2020-08-22 05:26:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:10,286 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-08-22 05:26:10,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 05:26:10,286 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-08-22 05:26:10,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 05:26:10,288 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:10,288 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:10,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 05:26:10,288 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:10,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:10,289 INFO L82 PathProgramCache]: Analyzing trace with hash 418322239, now seen corresponding path program 10 times [2020-08-22 05:26:10,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:10,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531066347] [2020-08-22 05:26:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 05:26:10,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531066347] [2020-08-22 05:26:10,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:10,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 05:26:10,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590953483] [2020-08-22 05:26:10,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 05:26:10,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:10,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 05:26:10,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-08-22 05:26:10,895 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 26 states. [2020-08-22 05:26:11,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:11,825 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-08-22 05:26:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 05:26:11,825 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2020-08-22 05:26:11,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:11,827 INFO L225 Difference]: With dead ends: 53 [2020-08-22 05:26:11,827 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 05:26:11,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=2029, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 05:26:11,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 05:26:11,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-22 05:26:11,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 05:26:11,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-08-22 05:26:11,843 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 74 [2020-08-22 05:26:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:11,845 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-08-22 05:26:11,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 05:26:11,845 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-08-22 05:26:11,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 05:26:11,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:11,846 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:11,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 05:26:11,847 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:11,852 INFO L82 PathProgramCache]: Analyzing trace with hash 584643913, now seen corresponding path program 11 times [2020-08-22 05:26:11,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:11,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615570013] [2020-08-22 05:26:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:11,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:11,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:11,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 05:26:12,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615570013] [2020-08-22 05:26:12,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:12,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 05:26:12,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002036247] [2020-08-22 05:26:12,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 05:26:12,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:12,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 05:26:12,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-08-22 05:26:12,623 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 28 states. [2020-08-22 05:26:13,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:13,673 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-08-22 05:26:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 05:26:13,673 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2020-08-22 05:26:13,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:13,675 INFO L225 Difference]: With dead ends: 56 [2020-08-22 05:26:13,675 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 05:26:13,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=2405, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 05:26:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 05:26:13,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-22 05:26:13,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 05:26:13,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-08-22 05:26:13,683 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 80 [2020-08-22 05:26:13,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:13,684 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-08-22 05:26:13,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 05:26:13,684 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-08-22 05:26:13,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 05:26:13,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:13,685 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:13,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 05:26:13,685 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:13,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:13,686 INFO L82 PathProgramCache]: Analyzing trace with hash -195309121, now seen corresponding path program 12 times [2020-08-22 05:26:13,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:13,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633762922] [2020-08-22 05:26:13,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:13,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:13,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:13,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:13,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:13,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:13,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:13,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:14,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:14,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:14,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:14,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:14,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:14,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:14,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 05:26:14,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633762922] [2020-08-22 05:26:14,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:14,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 05:26:14,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890966589] [2020-08-22 05:26:14,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 05:26:14,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:14,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 05:26:14,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-08-22 05:26:14,559 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 30 states. [2020-08-22 05:26:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:15,751 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-08-22 05:26:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 05:26:15,752 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-22 05:26:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:15,753 INFO L225 Difference]: With dead ends: 59 [2020-08-22 05:26:15,753 INFO L226 Difference]: Without dead ends: 55 [2020-08-22 05:26:15,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=2813, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 05:26:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-22 05:26:15,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-22 05:26:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 05:26:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-08-22 05:26:15,762 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 86 [2020-08-22 05:26:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:15,762 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-08-22 05:26:15,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 05:26:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-08-22 05:26:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 05:26:15,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:15,763 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:15,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 05:26:15,764 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:15,764 INFO L82 PathProgramCache]: Analyzing trace with hash 498071625, now seen corresponding path program 13 times [2020-08-22 05:26:15,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:15,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684031694] [2020-08-22 05:26:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:15,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:15,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:15,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:15,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:15,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:16,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:16,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:16,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:16,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:16,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:16,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:16,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:16,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:16,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:16,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 05:26:16,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684031694] [2020-08-22 05:26:16,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:16,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 05:26:16,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409617673] [2020-08-22 05:26:16,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 05:26:16,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:16,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 05:26:16,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-08-22 05:26:16,752 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 32 states. [2020-08-22 05:26:18,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:18,246 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-08-22 05:26:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 05:26:18,248 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2020-08-22 05:26:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:18,250 INFO L225 Difference]: With dead ends: 62 [2020-08-22 05:26:18,250 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 05:26:18,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=169, Invalid=3253, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 05:26:18,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 05:26:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-08-22 05:26:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 05:26:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-08-22 05:26:18,259 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 92 [2020-08-22 05:26:18,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:18,260 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-08-22 05:26:18,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 05:26:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-08-22 05:26:18,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 05:26:18,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:18,261 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:18,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 05:26:18,262 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:18,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1462920129, now seen corresponding path program 14 times [2020-08-22 05:26:18,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:18,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724708151] [2020-08-22 05:26:18,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:18,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:19,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:19,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:19,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:19,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 05:26:19,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724708151] [2020-08-22 05:26:19,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:19,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 05:26:19,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72395972] [2020-08-22 05:26:19,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 05:26:19,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:19,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 05:26:19,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 05:26:19,438 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 34 states. [2020-08-22 05:26:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:21,009 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2020-08-22 05:26:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 05:26:21,010 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2020-08-22 05:26:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:21,011 INFO L225 Difference]: With dead ends: 65 [2020-08-22 05:26:21,012 INFO L226 Difference]: Without dead ends: 61 [2020-08-22 05:26:21,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=181, Invalid=3725, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 05:26:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-22 05:26:21,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-08-22 05:26:21,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 05:26:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-08-22 05:26:21,020 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 98 [2020-08-22 05:26:21,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:21,021 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-08-22 05:26:21,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 05:26:21,021 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-08-22 05:26:21,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 05:26:21,022 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:21,022 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:21,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 05:26:21,023 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:21,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:21,023 INFO L82 PathProgramCache]: Analyzing trace with hash 2044701513, now seen corresponding path program 15 times [2020-08-22 05:26:21,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:21,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844098760] [2020-08-22 05:26:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 05:26:22,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844098760] [2020-08-22 05:26:22,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:22,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 05:26:22,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77353086] [2020-08-22 05:26:22,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 05:26:22,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:22,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 05:26:22,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 05:26:22,360 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 36 states. [2020-08-22 05:26:24,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:24,245 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2020-08-22 05:26:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-22 05:26:24,246 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 104 [2020-08-22 05:26:24,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:24,247 INFO L225 Difference]: With dead ends: 68 [2020-08-22 05:26:24,247 INFO L226 Difference]: Without dead ends: 64 [2020-08-22 05:26:24,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=193, Invalid=4229, Unknown=0, NotChecked=0, Total=4422 [2020-08-22 05:26:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-22 05:26:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-08-22 05:26:24,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 05:26:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-08-22 05:26:24,255 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 104 [2020-08-22 05:26:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:24,256 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-08-22 05:26:24,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 05:26:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-08-22 05:26:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-22 05:26:24,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:24,258 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:24,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 05:26:24,258 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:24,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:24,258 INFO L82 PathProgramCache]: Analyzing trace with hash -514820417, now seen corresponding path program 16 times [2020-08-22 05:26:24,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:24,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592614763] [2020-08-22 05:26:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 05:26:25,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592614763] [2020-08-22 05:26:25,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:25,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 05:26:25,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474320452] [2020-08-22 05:26:25,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 05:26:25,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:25,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 05:26:25,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 05:26:25,797 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 38 states. [2020-08-22 05:26:27,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:27,841 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-08-22 05:26:27,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 05:26:27,842 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2020-08-22 05:26:27,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:27,843 INFO L225 Difference]: With dead ends: 71 [2020-08-22 05:26:27,844 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 05:26:27,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=205, Invalid=4765, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 05:26:27,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 05:26:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-08-22 05:26:27,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 05:26:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-08-22 05:26:27,851 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 110 [2020-08-22 05:26:27,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:27,851 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-08-22 05:26:27,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 05:26:27,852 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-08-22 05:26:27,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 05:26:27,853 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:27,853 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:27,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 05:26:27,853 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:27,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1262227017, now seen corresponding path program 17 times [2020-08-22 05:26:27,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:27,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248216962] [2020-08-22 05:26:27,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:27,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:27,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:27,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:28,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:28,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:28,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:28,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:28,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:28,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:28,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:28,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:28,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:28,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:28,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:28,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:28,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:28,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:29,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:29,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-22 05:26:29,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248216962] [2020-08-22 05:26:29,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:29,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 05:26:29,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711247657] [2020-08-22 05:26:29,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 05:26:29,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:29,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 05:26:29,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 05:26:29,354 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 40 states. [2020-08-22 05:26:31,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:31,615 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-08-22 05:26:31,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 05:26:31,615 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2020-08-22 05:26:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:31,617 INFO L225 Difference]: With dead ends: 74 [2020-08-22 05:26:31,617 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 05:26:31,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=217, Invalid=5333, Unknown=0, NotChecked=0, Total=5550 [2020-08-22 05:26:31,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 05:26:31,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-22 05:26:31,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 05:26:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-08-22 05:26:31,630 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 116 [2020-08-22 05:26:31,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:31,631 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-08-22 05:26:31,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 05:26:31,636 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-08-22 05:26:31,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-22 05:26:31,637 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:31,637 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:31,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 05:26:31,638 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:31,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:31,638 INFO L82 PathProgramCache]: Analyzing trace with hash -336568001, now seen corresponding path program 18 times [2020-08-22 05:26:31,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:31,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937259597] [2020-08-22 05:26:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:31,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:31,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:31,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:31,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:31,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:31,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:31,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:32,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:32,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:32,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:32,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:32,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:32,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:32,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:32,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:32,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:32,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:32,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:33,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:33,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-22 05:26:33,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937259597] [2020-08-22 05:26:33,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:33,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 05:26:33,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185088199] [2020-08-22 05:26:33,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 05:26:33,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:33,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 05:26:33,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 05:26:33,572 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 42 states. [2020-08-22 05:26:36,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:36,037 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-08-22 05:26:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-22 05:26:36,038 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 122 [2020-08-22 05:26:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:36,039 INFO L225 Difference]: With dead ends: 77 [2020-08-22 05:26:36,039 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 05:26:36,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=229, Invalid=5933, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 05:26:36,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 05:26:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-08-22 05:26:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 05:26:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-08-22 05:26:36,047 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 122 [2020-08-22 05:26:36,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:36,047 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-08-22 05:26:36,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 05:26:36,047 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-08-22 05:26:36,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 05:26:36,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:36,049 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:36,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 05:26:36,049 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:36,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:36,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1835458231, now seen corresponding path program 19 times [2020-08-22 05:26:36,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:36,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668261417] [2020-08-22 05:26:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:36,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:36,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:36,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:36,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:36,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:36,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:36,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:36,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:36,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:36,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:36,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:36,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:36,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:36,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:37,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:37,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:37,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:37,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:37,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:37,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:37,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-22 05:26:38,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668261417] [2020-08-22 05:26:38,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:38,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 05:26:38,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491066377] [2020-08-22 05:26:38,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 05:26:38,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:38,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 05:26:38,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 05:26:38,086 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 44 states. [2020-08-22 05:26:40,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:40,917 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-08-22 05:26:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 05:26:40,918 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2020-08-22 05:26:40,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:40,919 INFO L225 Difference]: With dead ends: 80 [2020-08-22 05:26:40,920 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 05:26:40,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=241, Invalid=6565, Unknown=0, NotChecked=0, Total=6806 [2020-08-22 05:26:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 05:26:40,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-08-22 05:26:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 05:26:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-08-22 05:26:40,927 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 128 [2020-08-22 05:26:40,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:40,928 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-08-22 05:26:40,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 05:26:40,928 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-08-22 05:26:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-22 05:26:40,929 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:40,929 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:40,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 05:26:40,929 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:40,930 INFO L82 PathProgramCache]: Analyzing trace with hash 2042190783, now seen corresponding path program 20 times [2020-08-22 05:26:40,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:40,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568924587] [2020-08-22 05:26:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:40,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:40,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:41,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:41,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:41,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:41,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:41,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:41,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:41,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:41,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:41,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:41,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:41,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:41,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:41,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:42,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:42,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:42,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:42,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:42,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:42,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:42,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-22 05:26:42,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568924587] [2020-08-22 05:26:42,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:42,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-22 05:26:42,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107871617] [2020-08-22 05:26:42,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 05:26:42,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:42,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 05:26:42,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 05:26:42,936 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 46 states. [2020-08-22 05:26:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:45,995 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-08-22 05:26:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-22 05:26:45,996 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2020-08-22 05:26:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:45,998 INFO L225 Difference]: With dead ends: 83 [2020-08-22 05:26:45,998 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 05:26:45,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=253, Invalid=7229, Unknown=0, NotChecked=0, Total=7482 [2020-08-22 05:26:46,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 05:26:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-08-22 05:26:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 05:26:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-08-22 05:26:46,004 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 134 [2020-08-22 05:26:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:46,005 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-08-22 05:26:46,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 05:26:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-08-22 05:26:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-22 05:26:46,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:46,006 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:46,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 05:26:46,007 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:46,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:46,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2110448713, now seen corresponding path program 21 times [2020-08-22 05:26:46,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:46,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905425160] [2020-08-22 05:26:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:46,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:46,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:46,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:46,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:46,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:46,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:46,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:46,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:46,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:46,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:46,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:46,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:46,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:46,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:47,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:47,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:47,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:47,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:47,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:47,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:47,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:47,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:48,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-22 05:26:48,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905425160] [2020-08-22 05:26:48,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:48,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-22 05:26:48,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471175342] [2020-08-22 05:26:48,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 05:26:48,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:48,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 05:26:48,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 05:26:48,254 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 48 states. [2020-08-22 05:26:51,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:51,690 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2020-08-22 05:26:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-22 05:26:51,694 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2020-08-22 05:26:51,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:51,696 INFO L225 Difference]: With dead ends: 86 [2020-08-22 05:26:51,696 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 05:26:51,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=265, Invalid=7925, Unknown=0, NotChecked=0, Total=8190 [2020-08-22 05:26:51,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 05:26:51,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-22 05:26:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-22 05:26:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-08-22 05:26:51,702 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 140 [2020-08-22 05:26:51,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:51,702 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-08-22 05:26:51,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 05:26:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-08-22 05:26:51,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 05:26:51,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:51,704 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:51,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 05:26:51,704 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:51,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:51,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1589077567, now seen corresponding path program 22 times [2020-08-22 05:26:51,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:51,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991421278] [2020-08-22 05:26:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:51,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:51,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:51,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:51,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:51,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:52,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:52,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:52,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:52,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:52,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:52,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:52,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:52,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:52,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:52,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:52,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:52,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:53,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:53,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:53,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:53,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:53,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:53,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:53,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:53,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-22 05:26:54,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991421278] [2020-08-22 05:26:54,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:54,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-22 05:26:54,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472845615] [2020-08-22 05:26:54,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-22 05:26:54,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:54,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-22 05:26:54,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 05:26:54,143 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 50 states. [2020-08-22 05:26:58,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:58,123 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2020-08-22 05:26:58,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-08-22 05:26:58,124 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2020-08-22 05:26:58,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:58,125 INFO L225 Difference]: With dead ends: 89 [2020-08-22 05:26:58,125 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 05:26:58,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=277, Invalid=8653, Unknown=0, NotChecked=0, Total=8930 [2020-08-22 05:26:58,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 05:26:58,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-08-22 05:26:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 05:26:58,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-08-22 05:26:58,130 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 146 [2020-08-22 05:26:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:58,131 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-08-22 05:26:58,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-22 05:26:58,131 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-08-22 05:26:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-22 05:26:58,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:58,132 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:26:58,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 05:26:58,133 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:58,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1482336439, now seen corresponding path program 23 times [2020-08-22 05:26:58,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:58,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244843315] [2020-08-22 05:26:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:58,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:58,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:26:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:58,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:58,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:58,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:26:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat