/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 00:20:39,313 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 00:20:39,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 00:20:39,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 00:20:39,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 00:20:39,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 00:20:39,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 00:20:39,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 00:20:39,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 00:20:39,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 00:20:39,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 00:20:39,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 00:20:39,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 00:20:39,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 00:20:39,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 00:20:39,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 00:20:39,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 00:20:39,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 00:20:39,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 00:20:39,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 00:20:39,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 00:20:39,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 00:20:39,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 00:20:39,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 00:20:39,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 00:20:39,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 00:20:39,374 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 [2020-08-19 00:20:39,395 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 00:20:39,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 00:20:39,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 00:20:39,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 00:20:39,397 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 00:20:39,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 00:20:39,398 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 00:20:39,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 00:20:39,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 00:20:39,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 00:20:39,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 00:20:39,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 00:20:39,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 00:20:39,399 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 00:20:39,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 00:20:39,399 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 00:20:39,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 00:20:39,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 00:20:39,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 00:20:39,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 00:20:39,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 00:20:39,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 00:20:39,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 00:20:39,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 00:20:39,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 00:20:39,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 00:20:39,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 00:20:39,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 00:20:39,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 00:20:39,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; [2020-08-19 00:20:39,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 00:20:39,749 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 00:20:39,752 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 00:20:39,754 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 00:20:39,756 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 00:20:39,757 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-19 00:20:39,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f1128d69/f67d5de520b24146a2bb5776bec37269/FLAG40deaa1ca [2020-08-19 00:20:40,330 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 00:20:40,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-19 00:20:40,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f1128d69/f67d5de520b24146a2bb5776bec37269/FLAG40deaa1ca [2020-08-19 00:20:40,744 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f1128d69/f67d5de520b24146a2bb5776bec37269 [2020-08-19 00:20:40,754 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 00:20:40,756 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 00:20:40,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 00:20:40,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 00:20:40,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 00:20:40,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:20:40" (1/1) ... [2020-08-19 00:20:40,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@674bda66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:40, skipping insertion in model container [2020-08-19 00:20:40,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:20:40" (1/1) ... [2020-08-19 00:20:40,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 00:20:40,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 00:20:40,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:20:40,994 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 00:20:41,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:20:41,046 INFO L208 MainTranslator]: Completed translation [2020-08-19 00:20:41,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:41 WrapperNode [2020-08-19 00:20:41,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 00:20:41,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 00:20:41,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 00:20:41,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 00:20:41,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:41" (1/1) ... [2020-08-19 00:20:41,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:41" (1/1) ... [2020-08-19 00:20:41,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:41" (1/1) ... [2020-08-19 00:20:41,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:41" (1/1) ... [2020-08-19 00:20:41,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:41" (1/1) ... [2020-08-19 00:20:41,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:41" (1/1) ... [2020-08-19 00:20:41,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:41" (1/1) ... [2020-08-19 00:20:41,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 00:20:41,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 00:20:41,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 00:20:41,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 00:20:41,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:41" (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 [2020-08-19 00:20:41,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 00:20:41,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 00:20:41,259 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 00:20:41,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 00:20:41,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 00:20:41,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 00:20:41,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 00:20:41,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 00:20:41,638 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 00:20:41,639 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 00:20:41,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:20:41 BoogieIcfgContainer [2020-08-19 00:20:41,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 00:20:41,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 00:20:41,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 00:20:41,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 00:20:41,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 12:20:40" (1/3) ... [2020-08-19 00:20:41,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebd9bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:20:41, skipping insertion in model container [2020-08-19 00:20:41,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:41" (2/3) ... [2020-08-19 00:20:41,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebd9bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:20:41, skipping insertion in model container [2020-08-19 00:20:41,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:20:41" (3/3) ... [2020-08-19 00:20:41,652 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-19 00:20:41,662 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 00:20:41,670 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 00:20:41,684 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 00:20:41,709 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 00:20:41,710 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 00:20:41,710 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 00:20:41,710 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 00:20:41,710 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 00:20:41,710 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 00:20:41,711 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 00:20:41,711 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 00:20:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-19 00:20:41,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 00:20:41,738 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:41,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:41,739 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:41,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:41,745 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-19 00:20:41,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:41,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52135526] [2020-08-19 00:20:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:41,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:41,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52135526] [2020-08-19 00:20:41,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:41,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:41,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766715536] [2020-08-19 00:20:41,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:41,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:42,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:42,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,005 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-19 00:20:42,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:42,068 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-19 00:20:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:42,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 00:20:42,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:42,081 INFO L225 Difference]: With dead ends: 93 [2020-08-19 00:20:42,082 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 00:20:42,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 00:20:42,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-19 00:20:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 00:20:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-19 00:20:42,128 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-19 00:20:42,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:42,129 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-19 00:20:42,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:42,129 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-19 00:20:42,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 00:20:42,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:42,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:42,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 00:20:42,131 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:42,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-19 00:20:42,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:42,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874442849] [2020-08-19 00:20:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:42,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874442849] [2020-08-19 00:20:42,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:42,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:42,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492474419] [2020-08-19 00:20:42,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:42,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:42,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:42,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,219 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-19 00:20:42,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:42,252 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-19 00:20:42,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:42,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 00:20:42,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:42,255 INFO L225 Difference]: With dead ends: 127 [2020-08-19 00:20:42,255 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 00:20:42,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 00:20:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-19 00:20:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 00:20:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-19 00:20:42,274 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-19 00:20:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:42,274 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-19 00:20:42,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-19 00:20:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 00:20:42,277 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:42,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:42,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 00:20:42,279 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:42,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:42,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-19 00:20:42,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:42,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638856093] [2020-08-19 00:20:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:42,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638856093] [2020-08-19 00:20:42,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:42,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:42,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354958814] [2020-08-19 00:20:42,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:42,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:42,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:42,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,373 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-19 00:20:42,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:42,440 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-19 00:20:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:42,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 00:20:42,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:42,444 INFO L225 Difference]: With dead ends: 117 [2020-08-19 00:20:42,444 INFO L226 Difference]: Without dead ends: 81 [2020-08-19 00:20:42,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-19 00:20:42,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-19 00:20:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 00:20:42,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-19 00:20:42,456 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-19 00:20:42,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:42,457 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-19 00:20:42,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-19 00:20:42,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 00:20:42,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:42,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:42,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 00:20:42,459 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:42,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-19 00:20:42,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:42,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213975359] [2020-08-19 00:20:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:42,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213975359] [2020-08-19 00:20:42,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:42,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:42,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678262335] [2020-08-19 00:20:42,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:42,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:42,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:42,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,505 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-19 00:20:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:42,528 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-19 00:20:42,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:42,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 00:20:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:42,530 INFO L225 Difference]: With dead ends: 148 [2020-08-19 00:20:42,530 INFO L226 Difference]: Without dead ends: 146 [2020-08-19 00:20:42,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-19 00:20:42,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-19 00:20:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-19 00:20:42,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-19 00:20:42,545 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-19 00:20:42,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:42,545 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-19 00:20:42,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:42,546 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-19 00:20:42,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 00:20:42,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:42,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:42,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 00:20:42,548 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:42,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:42,548 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-19 00:20:42,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:42,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415758662] [2020-08-19 00:20:42,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:42,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415758662] [2020-08-19 00:20:42,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:42,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:42,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102162808] [2020-08-19 00:20:42,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:42,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:42,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:42,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,602 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-19 00:20:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:42,624 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-19 00:20:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:42,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 00:20:42,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:42,626 INFO L225 Difference]: With dead ends: 244 [2020-08-19 00:20:42,627 INFO L226 Difference]: Without dead ends: 148 [2020-08-19 00:20:42,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-19 00:20:42,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-19 00:20:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-19 00:20:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-19 00:20:42,643 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-19 00:20:42,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:42,643 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-19 00:20:42,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:42,644 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-19 00:20:42,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 00:20:42,645 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:42,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:42,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 00:20:42,646 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:42,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:42,646 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-19 00:20:42,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:42,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884416638] [2020-08-19 00:20:42,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:42,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884416638] [2020-08-19 00:20:42,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:42,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:42,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145504327] [2020-08-19 00:20:42,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:42,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:42,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:42,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,715 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-19 00:20:42,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:42,736 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-19 00:20:42,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:42,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 00:20:42,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:42,738 INFO L225 Difference]: With dead ends: 219 [2020-08-19 00:20:42,739 INFO L226 Difference]: Without dead ends: 150 [2020-08-19 00:20:42,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-19 00:20:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-19 00:20:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-19 00:20:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-19 00:20:42,769 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-19 00:20:42,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:42,770 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-19 00:20:42,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-19 00:20:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 00:20:42,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:42,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:42,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 00:20:42,772 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:42,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:42,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-19 00:20:42,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:42,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104149715] [2020-08-19 00:20:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:42,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104149715] [2020-08-19 00:20:42,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:42,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:42,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609809734] [2020-08-19 00:20:42,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:42,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:42,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:42,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,808 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-19 00:20:42,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:42,826 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-19 00:20:42,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:42,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 00:20:42,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:42,828 INFO L225 Difference]: With dead ends: 276 [2020-08-19 00:20:42,829 INFO L226 Difference]: Without dead ends: 274 [2020-08-19 00:20:42,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-19 00:20:42,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-19 00:20:42,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-19 00:20:42,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-19 00:20:42,844 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-19 00:20:42,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:42,845 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-19 00:20:42,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:42,845 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-19 00:20:42,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 00:20:42,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:42,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:42,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 00:20:42,847 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:42,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-19 00:20:42,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:42,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483174841] [2020-08-19 00:20:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:42,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483174841] [2020-08-19 00:20:42,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:42,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:42,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946843854] [2020-08-19 00:20:42,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:42,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:42,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:42,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,922 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-19 00:20:42,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:42,948 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-19 00:20:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:42,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 00:20:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:42,951 INFO L225 Difference]: With dead ends: 472 [2020-08-19 00:20:42,951 INFO L226 Difference]: Without dead ends: 282 [2020-08-19 00:20:42,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:42,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-19 00:20:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-19 00:20:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-19 00:20:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-19 00:20:42,970 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-19 00:20:42,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:42,971 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-19 00:20:42,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:42,971 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-19 00:20:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 00:20:42,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:42,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:42,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 00:20:42,974 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:42,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:42,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-19 00:20:42,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:42,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644744602] [2020-08-19 00:20:42,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:42,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:43,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644744602] [2020-08-19 00:20:43,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:43,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:43,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30752393] [2020-08-19 00:20:43,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:43,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:43,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,003 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-19 00:20:43,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:43,021 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-19 00:20:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:43,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 00:20:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:43,024 INFO L225 Difference]: With dead ends: 420 [2020-08-19 00:20:43,024 INFO L226 Difference]: Without dead ends: 286 [2020-08-19 00:20:43,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-19 00:20:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-19 00:20:43,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-19 00:20:43,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-19 00:20:43,041 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-19 00:20:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:43,041 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-19 00:20:43,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:43,041 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-19 00:20:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 00:20:43,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:43,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:43,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 00:20:43,044 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:43,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:43,044 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-19 00:20:43,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:43,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6585612] [2020-08-19 00:20:43,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:43,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6585612] [2020-08-19 00:20:43,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:43,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:43,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758643301] [2020-08-19 00:20:43,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:43,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:43,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:43,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,072 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-19 00:20:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:43,093 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-19 00:20:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:43,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 00:20:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:43,097 INFO L225 Difference]: With dead ends: 524 [2020-08-19 00:20:43,098 INFO L226 Difference]: Without dead ends: 522 [2020-08-19 00:20:43,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-19 00:20:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-19 00:20:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-19 00:20:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-19 00:20:43,114 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-19 00:20:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:43,115 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-19 00:20:43,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-19 00:20:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 00:20:43,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:43,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:43,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 00:20:43,118 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:43,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:43,118 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-19 00:20:43,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:43,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16948846] [2020-08-19 00:20:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:43,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16948846] [2020-08-19 00:20:43,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:43,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:43,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809694161] [2020-08-19 00:20:43,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:43,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:43,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:43,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,145 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-19 00:20:43,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:43,169 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-19 00:20:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:43,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 00:20:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:43,173 INFO L225 Difference]: With dead ends: 924 [2020-08-19 00:20:43,173 INFO L226 Difference]: Without dead ends: 546 [2020-08-19 00:20:43,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-19 00:20:43,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-19 00:20:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-19 00:20:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-19 00:20:43,194 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-19 00:20:43,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:43,194 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-19 00:20:43,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:43,194 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-19 00:20:43,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 00:20:43,196 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:43,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:43,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 00:20:43,197 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:43,197 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-19 00:20:43,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:43,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169570274] [2020-08-19 00:20:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:43,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169570274] [2020-08-19 00:20:43,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:43,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:43,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096847233] [2020-08-19 00:20:43,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:43,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:43,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:43,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,224 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-19 00:20:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:43,245 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-19 00:20:43,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:43,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 00:20:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:43,249 INFO L225 Difference]: With dead ends: 816 [2020-08-19 00:20:43,250 INFO L226 Difference]: Without dead ends: 554 [2020-08-19 00:20:43,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-19 00:20:43,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-19 00:20:43,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-19 00:20:43,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-19 00:20:43,268 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-19 00:20:43,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:43,268 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-19 00:20:43,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:43,268 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-19 00:20:43,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 00:20:43,269 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:43,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:43,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 00:20:43,270 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:43,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:43,271 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-19 00:20:43,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:43,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259411240] [2020-08-19 00:20:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:43,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259411240] [2020-08-19 00:20:43,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:43,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:43,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853715850] [2020-08-19 00:20:43,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:43,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:43,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:43,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,297 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-19 00:20:43,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:43,320 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-19 00:20:43,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:43,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 00:20:43,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:43,326 INFO L225 Difference]: With dead ends: 1004 [2020-08-19 00:20:43,326 INFO L226 Difference]: Without dead ends: 1002 [2020-08-19 00:20:43,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-19 00:20:43,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-19 00:20:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-19 00:20:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-19 00:20:43,353 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-19 00:20:43,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:43,353 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-19 00:20:43,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:43,354 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-19 00:20:43,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 00:20:43,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:43,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:43,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 00:20:43,356 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:43,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:43,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-19 00:20:43,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:43,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930227494] [2020-08-19 00:20:43,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:43,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930227494] [2020-08-19 00:20:43,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:43,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:43,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872556] [2020-08-19 00:20:43,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:43,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:43,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:43,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,384 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-19 00:20:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:43,415 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-19 00:20:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:43,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 00:20:43,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:43,421 INFO L225 Difference]: With dead ends: 1820 [2020-08-19 00:20:43,422 INFO L226 Difference]: Without dead ends: 1066 [2020-08-19 00:20:43,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-19 00:20:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-19 00:20:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-19 00:20:43,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-19 00:20:43,457 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-19 00:20:43,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:43,458 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-19 00:20:43,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:43,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-19 00:20:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 00:20:43,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:43,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:43,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 00:20:43,461 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:43,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:43,461 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-19 00:20:43,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:43,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078994759] [2020-08-19 00:20:43,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:43,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078994759] [2020-08-19 00:20:43,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:43,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:43,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476880871] [2020-08-19 00:20:43,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:43,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:43,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:43,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,498 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-19 00:20:43,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:43,534 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-19 00:20:43,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:43,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 00:20:43,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:43,540 INFO L225 Difference]: With dead ends: 1596 [2020-08-19 00:20:43,541 INFO L226 Difference]: Without dead ends: 1082 [2020-08-19 00:20:43,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-19 00:20:43,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-19 00:20:43,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-19 00:20:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-19 00:20:43,573 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-19 00:20:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:43,574 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-19 00:20:43,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-19 00:20:43,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 00:20:43,576 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:43,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:43,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 00:20:43,577 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:43,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:43,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-19 00:20:43,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:43,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069245936] [2020-08-19 00:20:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:43,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069245936] [2020-08-19 00:20:43,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:43,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:43,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903143880] [2020-08-19 00:20:43,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:43,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:43,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:43,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,603 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-19 00:20:43,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:43,638 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-19 00:20:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:43,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 00:20:43,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:43,648 INFO L225 Difference]: With dead ends: 1932 [2020-08-19 00:20:43,648 INFO L226 Difference]: Without dead ends: 1930 [2020-08-19 00:20:43,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-19 00:20:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-19 00:20:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-19 00:20:43,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-19 00:20:43,692 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-19 00:20:43,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:43,692 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-19 00:20:43,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:43,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-19 00:20:43,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 00:20:43,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:43,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:43,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 00:20:43,696 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:43,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:43,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-19 00:20:43,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:43,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830912250] [2020-08-19 00:20:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:43,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830912250] [2020-08-19 00:20:43,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:43,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:43,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559948952] [2020-08-19 00:20:43,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:43,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:43,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:43,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,720 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-19 00:20:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:43,765 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-19 00:20:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:43,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 00:20:43,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:43,775 INFO L225 Difference]: With dead ends: 3596 [2020-08-19 00:20:43,775 INFO L226 Difference]: Without dead ends: 2090 [2020-08-19 00:20:43,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-19 00:20:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-19 00:20:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-19 00:20:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-19 00:20:43,838 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-19 00:20:43,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:43,839 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-19 00:20:43,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:43,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-19 00:20:43,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 00:20:43,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:43,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:43,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 00:20:43,842 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:43,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-19 00:20:43,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:43,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478839751] [2020-08-19 00:20:43,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:43,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478839751] [2020-08-19 00:20:43,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:43,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:43,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969996608] [2020-08-19 00:20:43,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:43,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:43,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:43,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,867 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-19 00:20:43,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:43,913 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-19 00:20:43,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:43,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 00:20:43,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:43,928 INFO L225 Difference]: With dead ends: 3132 [2020-08-19 00:20:43,928 INFO L226 Difference]: Without dead ends: 2122 [2020-08-19 00:20:43,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-19 00:20:43,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-19 00:20:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-19 00:20:44,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-19 00:20:44,009 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-19 00:20:44,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:44,009 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-19 00:20:44,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:44,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-19 00:20:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 00:20:44,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:44,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:44,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 00:20:44,014 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:44,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:44,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-19 00:20:44,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:44,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316192169] [2020-08-19 00:20:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:44,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316192169] [2020-08-19 00:20:44,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:44,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:44,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077993511] [2020-08-19 00:20:44,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:44,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:44,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:44,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:44,080 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-19 00:20:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:44,167 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-19 00:20:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:44,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 00:20:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:44,190 INFO L225 Difference]: With dead ends: 3724 [2020-08-19 00:20:44,191 INFO L226 Difference]: Without dead ends: 3722 [2020-08-19 00:20:44,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:44,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-19 00:20:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-19 00:20:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-19 00:20:44,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-19 00:20:44,297 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-19 00:20:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:44,297 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-19 00:20:44,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:44,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-19 00:20:44,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 00:20:44,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:44,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:44,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 00:20:44,306 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:44,306 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-19 00:20:44,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:44,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878688076] [2020-08-19 00:20:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:44,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878688076] [2020-08-19 00:20:44,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:44,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:44,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267221896] [2020-08-19 00:20:44,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:44,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:44,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:44,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:44,344 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-19 00:20:44,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:44,425 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-19 00:20:44,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:44,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 00:20:44,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:44,445 INFO L225 Difference]: With dead ends: 7116 [2020-08-19 00:20:44,446 INFO L226 Difference]: Without dead ends: 4106 [2020-08-19 00:20:44,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-19 00:20:44,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-19 00:20:44,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-19 00:20:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-19 00:20:44,573 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-19 00:20:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:44,573 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-19 00:20:44,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-19 00:20:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 00:20:44,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:44,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:44,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 00:20:44,582 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:44,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:44,582 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-19 00:20:44,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:44,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712999039] [2020-08-19 00:20:44,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:44,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712999039] [2020-08-19 00:20:44,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:44,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:44,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502184364] [2020-08-19 00:20:44,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:44,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:44,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:44,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:44,605 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-19 00:20:44,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:44,689 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-19 00:20:44,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:44,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 00:20:44,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:44,735 INFO L225 Difference]: With dead ends: 6156 [2020-08-19 00:20:44,740 INFO L226 Difference]: Without dead ends: 4170 [2020-08-19 00:20:44,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:44,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-19 00:20:44,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-19 00:20:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-19 00:20:44,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-19 00:20:44,883 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-19 00:20:44,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:44,883 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-19 00:20:44,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:44,883 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-19 00:20:44,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 00:20:44,889 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:44,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:44,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 00:20:44,889 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:44,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:44,890 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-19 00:20:44,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:44,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828067730] [2020-08-19 00:20:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:44,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828067730] [2020-08-19 00:20:44,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:44,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:44,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022693561] [2020-08-19 00:20:44,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:44,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:44,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:44,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:44,923 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-19 00:20:45,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:45,030 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-19 00:20:45,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:45,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 00:20:45,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:45,048 INFO L225 Difference]: With dead ends: 12108 [2020-08-19 00:20:45,048 INFO L226 Difference]: Without dead ends: 8074 [2020-08-19 00:20:45,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:45,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-19 00:20:45,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-19 00:20:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-19 00:20:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-19 00:20:45,331 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-19 00:20:45,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:45,331 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-19 00:20:45,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:45,332 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-19 00:20:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 00:20:45,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:45,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:45,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 00:20:45,340 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:45,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-19 00:20:45,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:45,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540481884] [2020-08-19 00:20:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:45,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:45,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540481884] [2020-08-19 00:20:45,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:45,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:45,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743747377] [2020-08-19 00:20:45,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:45,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:45,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:45,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:45,364 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-19 00:20:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:45,471 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-19 00:20:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:45,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 00:20:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:45,488 INFO L225 Difference]: With dead ends: 9100 [2020-08-19 00:20:45,488 INFO L226 Difference]: Without dead ends: 9098 [2020-08-19 00:20:45,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:45,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-19 00:20:45,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-19 00:20:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-19 00:20:45,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-19 00:20:45,670 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-19 00:20:45,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:45,670 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-19 00:20:45,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-19 00:20:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 00:20:45,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:45,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:45,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 00:20:45,680 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:45,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:45,680 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-19 00:20:45,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:45,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666189613] [2020-08-19 00:20:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:45,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:45,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666189613] [2020-08-19 00:20:45,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:45,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:45,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140031596] [2020-08-19 00:20:45,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:45,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:45,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:45,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:45,702 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-19 00:20:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:45,919 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-19 00:20:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:45,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 00:20:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:45,943 INFO L225 Difference]: With dead ends: 13708 [2020-08-19 00:20:45,944 INFO L226 Difference]: Without dead ends: 13706 [2020-08-19 00:20:45,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:45,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-19 00:20:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-19 00:20:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-19 00:20:46,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-19 00:20:46,165 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-19 00:20:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:46,165 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-19 00:20:46,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:46,165 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-19 00:20:46,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 00:20:46,183 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:46,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:46,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 00:20:46,183 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:46,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-19 00:20:46,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:46,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902912161] [2020-08-19 00:20:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:46,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:46,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902912161] [2020-08-19 00:20:46,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:46,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:46,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269599552] [2020-08-19 00:20:46,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:46,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:46,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:46,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:46,220 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-19 00:20:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:46,519 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-19 00:20:46,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:46,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 00:20:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:46,546 INFO L225 Difference]: With dead ends: 27788 [2020-08-19 00:20:46,546 INFO L226 Difference]: Without dead ends: 15754 [2020-08-19 00:20:46,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-19 00:20:46,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-19 00:20:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-19 00:20:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-19 00:20:46,886 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-19 00:20:46,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:46,886 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-19 00:20:46,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:46,887 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-19 00:20:46,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 00:20:46,904 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:46,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:46,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 00:20:46,905 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:46,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:46,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-19 00:20:46,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:46,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112868476] [2020-08-19 00:20:46,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:46,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:46,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112868476] [2020-08-19 00:20:46,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:46,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:46,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302046704] [2020-08-19 00:20:46,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:46,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:46,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:46,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:46,932 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-19 00:20:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:47,497 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-19 00:20:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:47,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 00:20:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:47,521 INFO L225 Difference]: With dead ends: 23820 [2020-08-19 00:20:47,521 INFO L226 Difference]: Without dead ends: 16138 [2020-08-19 00:20:47,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:47,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-19 00:20:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-19 00:20:47,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-19 00:20:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-19 00:20:47,840 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-19 00:20:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:47,841 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-19 00:20:47,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-19 00:20:47,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 00:20:47,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:47,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:47,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 00:20:47,862 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:47,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:47,863 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-19 00:20:47,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:47,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798093160] [2020-08-19 00:20:47,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:47,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:47,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798093160] [2020-08-19 00:20:47,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:47,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:47,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226599739] [2020-08-19 00:20:47,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:47,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:47,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:47,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:47,884 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-19 00:20:48,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:48,237 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-19 00:20:48,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:48,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 00:20:48,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:48,270 INFO L225 Difference]: With dead ends: 26636 [2020-08-19 00:20:48,270 INFO L226 Difference]: Without dead ends: 26634 [2020-08-19 00:20:48,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:48,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-19 00:20:48,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-19 00:20:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-19 00:20:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-19 00:20:48,701 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-19 00:20:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:48,701 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-19 00:20:48,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:48,702 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-19 00:20:48,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 00:20:48,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:48,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:48,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 00:20:48,743 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:48,744 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-19 00:20:48,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:48,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285158195] [2020-08-19 00:20:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:48,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:48,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285158195] [2020-08-19 00:20:48,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:48,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:48,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487842288] [2020-08-19 00:20:48,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:48,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:48,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:48,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:48,772 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-19 00:20:49,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:49,200 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-19 00:20:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:49,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 00:20:49,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:49,237 INFO L225 Difference]: With dead ends: 55308 [2020-08-19 00:20:49,237 INFO L226 Difference]: Without dead ends: 31242 [2020-08-19 00:20:49,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-19 00:20:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-19 00:20:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-19 00:20:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-19 00:20:49,796 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-19 00:20:49,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:49,796 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-19 00:20:49,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-19 00:20:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 00:20:49,823 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:49,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:49,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 00:20:49,823 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:49,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:49,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-19 00:20:49,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:49,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17120965] [2020-08-19 00:20:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:49,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17120965] [2020-08-19 00:20:49,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:49,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:49,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226938430] [2020-08-19 00:20:49,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:49,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:49,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:49,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:49,852 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-19 00:20:50,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:50,314 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-19 00:20:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:50,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 00:20:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:50,352 INFO L225 Difference]: With dead ends: 46860 [2020-08-19 00:20:50,353 INFO L226 Difference]: Without dead ends: 31754 [2020-08-19 00:20:50,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-19 00:20:50,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-19 00:20:50,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-19 00:20:51,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-19 00:20:51,086 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-19 00:20:51,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:51,086 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-19 00:20:51,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:51,086 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-19 00:20:51,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 00:20:51,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:51,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:51,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 00:20:51,101 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:51,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-19 00:20:51,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:51,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417751420] [2020-08-19 00:20:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:51,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417751420] [2020-08-19 00:20:51,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:51,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:51,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4375219] [2020-08-19 00:20:51,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:51,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:51,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:51,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,121 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-19 00:20:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:51,495 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-19 00:20:51,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:51,495 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 00:20:51,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:51,539 INFO L225 Difference]: With dead ends: 51210 [2020-08-19 00:20:51,539 INFO L226 Difference]: Without dead ends: 51208 [2020-08-19 00:20:51,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-19 00:20:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-19 00:20:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-19 00:20:53,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-19 00:20:53,078 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-19 00:20:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:53,079 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-19 00:20:53,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:53,079 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-19 00:20:53,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 00:20:53,113 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:53,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:53,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 00:20:53,113 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:53,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:53,114 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-19 00:20:53,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:53,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635014633] [2020-08-19 00:20:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:53,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635014633] [2020-08-19 00:20:53,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:53,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:53,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212552849] [2020-08-19 00:20:53,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:53,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:53,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:53,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:53,138 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-19 00:20:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:53,832 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-19 00:20:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:53,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 00:20:53,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:53,833 INFO L225 Difference]: With dead ends: 109576 [2020-08-19 00:20:53,833 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 00:20:53,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 00:20:53,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 00:20:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 00:20:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 00:20:53,936 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-19 00:20:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:53,937 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 00:20:53,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:53,937 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 00:20:53,937 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 00:20:53,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 00:20:53,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 00:20:53,973 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 00:20:53,973 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 00:20:53,973 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 00:20:53,973 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 00:20:53,973 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 00:20:53,974 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 00:20:53,974 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-19 00:20:53,974 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-19 00:20:53,974 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-19 00:20:53,974 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-19 00:20:53,974 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-19 00:20:53,974 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-19 00:20:53,974 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,975 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,975 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,975 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,975 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-19 00:20:53,975 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,975 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-19 00:20:53,975 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,976 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,976 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-19 00:20:53,976 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,976 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-19 00:20:53,976 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,976 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,976 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-19 00:20:53,976 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-19 00:20:53,976 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-19 00:20:53,977 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-19 00:20:53,980 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,980 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,980 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-19 00:20:53,980 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-19 00:20:53,981 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-19 00:20:53,981 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,981 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,981 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,981 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,981 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,981 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,981 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,981 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-19 00:20:53,982 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-19 00:20:53,982 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,982 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 00:20:53,982 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-19 00:20:54,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 12:20:54 BoogieIcfgContainer [2020-08-19 00:20:54,002 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 00:20:54,004 INFO L168 Benchmark]: Toolchain (without parser) took 13248.22 ms. Allocated memory was 139.5 MB in the beginning and 1.0 GB in the end (delta: 876.6 MB). Free memory was 102.2 MB in the beginning and 340.1 MB in the end (delta: -237.9 MB). Peak memory consumption was 638.7 MB. Max. memory is 7.1 GB. [2020-08-19 00:20:54,012 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 00:20:54,013 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.37 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 90.7 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-08-19 00:20:54,013 INFO L168 Benchmark]: Boogie Preprocessor took 142.71 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 90.7 MB in the beginning and 179.8 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-19 00:20:54,014 INFO L168 Benchmark]: RCFGBuilder took 452.40 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 159.6 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-08-19 00:20:54,014 INFO L168 Benchmark]: TraceAbstraction took 12357.44 ms. Allocated memory was 202.4 MB in the beginning and 1.0 GB in the end (delta: 813.7 MB). Free memory was 158.9 MB in the beginning and 340.1 MB in the end (delta: -181.2 MB). Peak memory consumption was 632.5 MB. Max. memory is 7.1 GB. [2020-08-19 00:20:54,020 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.37 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 90.7 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.71 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 90.7 MB in the beginning and 179.8 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 452.40 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 159.6 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12357.44 ms. Allocated memory was 202.4 MB in the beginning and 1.0 GB in the end (delta: 813.7 MB). Free memory was 158.9 MB in the beginning and 340.1 MB in the end (delta: -181.2 MB). Peak memory consumption was 632.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.2s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.2s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...