/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:13:58,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:13:58,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:13:58,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 22:13:58,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:13:58,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:13:58,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:13:58,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:13:58,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:13:58,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:13:59,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:13:59,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:13:59,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:13:59,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:13:59,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:13:59,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:13:59,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:13:59,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:13:59,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:13:59,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:13:59,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:13:59,042 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:13:59,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:13:59,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:13:59,044 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:13:59,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:13:59,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:13:59,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:13:59,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:13:59,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:13:59,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:13:59,045 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:13:59,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:13:59,046 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:13:59,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:13:59,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:13:59,047 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:13:59,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:13:59,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:13:59,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:13:59,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:13:59,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:13:59,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:13:59,048 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-08-22 22:13:59,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:13:59,342 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:13:59,348 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:13:59,350 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:13:59,350 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:13:59,351 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-22 22:13:59,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3548ed278/786d3c88ef7c424da24e51ce80c3733b/FLAG63de333e8 [2020-08-22 22:13:59,931 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:13:59,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-22 22:13:59,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3548ed278/786d3c88ef7c424da24e51ce80c3733b/FLAG63de333e8 [2020-08-22 22:14:00,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3548ed278/786d3c88ef7c424da24e51ce80c3733b [2020-08-22 22:14:00,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:14:00,325 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:14:00,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:14:00,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:14:00,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:14:00,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:14:00" (1/1) ... [2020-08-22 22:14:00,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c173ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:14:00, skipping insertion in model container [2020-08-22 22:14:00,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:14:00" (1/1) ... [2020-08-22 22:14:00,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:14:00,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:14:00,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:14:00,567 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:14:00,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:14:00,612 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:14:00,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:14:00 WrapperNode [2020-08-22 22:14:00,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:14:00,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:14:00,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:14:00,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:14:00,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:14:00" (1/1) ... [2020-08-22 22:14:00,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:14:00" (1/1) ... [2020-08-22 22:14:00,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:14:00" (1/1) ... [2020-08-22 22:14:00,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:14:00" (1/1) ... [2020-08-22 22:14:00,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:14:00" (1/1) ... [2020-08-22 22:14:00,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:14:00" (1/1) ... [2020-08-22 22:14:00,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:14:00" (1/1) ... [2020-08-22 22:14:00,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:14:00,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:14:00,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:14:00,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:14:00,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:14:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:14:00,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:14:00,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:14:00,809 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:14:00,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:14:00,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:14:00,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:14:00,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:14:00,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:14:01,273 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:14:01,274 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 22:14:01,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:14:01 BoogieIcfgContainer [2020-08-22 22:14:01,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:14:01,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:14:01,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:14:01,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:14:01,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:14:00" (1/3) ... [2020-08-22 22:14:01,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d561814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:14:01, skipping insertion in model container [2020-08-22 22:14:01,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:14:00" (2/3) ... [2020-08-22 22:14:01,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d561814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:14:01, skipping insertion in model container [2020-08-22 22:14:01,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:14:01" (3/3) ... [2020-08-22 22:14:01,290 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-22 22:14:01,302 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:14:01,310 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:14:01,326 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:14:01,350 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:14:01,351 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:14:01,351 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:14:01,351 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:14:01,352 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:14:01,352 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:14:01,352 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:14:01,352 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:14:01,372 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-08-22 22:14:01,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 22:14:01,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:01,389 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:14:01,390 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:01,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:01,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1546178992, now seen corresponding path program 1 times [2020-08-22 22:14:01,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:01,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879798611] [2020-08-22 22:14:01,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:01,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:01,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879798611] [2020-08-22 22:14:01,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:01,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:01,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570129906] [2020-08-22 22:14:01,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:01,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:01,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:01,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:01,694 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 3 states. [2020-08-22 22:14:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:01,803 INFO L93 Difference]: Finished difference Result 279 states and 384 transitions. [2020-08-22 22:14:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:01,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-08-22 22:14:01,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:01,822 INFO L225 Difference]: With dead ends: 279 [2020-08-22 22:14:01,823 INFO L226 Difference]: Without dead ends: 192 [2020-08-22 22:14:01,828 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 [2020-08-22 22:14:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-08-22 22:14:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-08-22 22:14:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-08-22 22:14:01,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 252 transitions. [2020-08-22 22:14:01,907 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 252 transitions. Word has length 79 [2020-08-22 22:14:01,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:01,908 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 252 transitions. [2020-08-22 22:14:01,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:01,908 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 252 transitions. [2020-08-22 22:14:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 22:14:01,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:01,912 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:14:01,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:14:01,913 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:01,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:01,914 INFO L82 PathProgramCache]: Analyzing trace with hash 687152074, now seen corresponding path program 1 times [2020-08-22 22:14:01,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:01,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904279652] [2020-08-22 22:14:01,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:02,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:02,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904279652] [2020-08-22 22:14:02,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:02,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:02,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378505089] [2020-08-22 22:14:02,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:02,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:02,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:02,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:02,080 INFO L87 Difference]: Start difference. First operand 190 states and 252 transitions. Second operand 3 states. [2020-08-22 22:14:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:02,159 INFO L93 Difference]: Finished difference Result 466 states and 650 transitions. [2020-08-22 22:14:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:02,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-08-22 22:14:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:02,164 INFO L225 Difference]: With dead ends: 466 [2020-08-22 22:14:02,164 INFO L226 Difference]: Without dead ends: 325 [2020-08-22 22:14:02,167 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 [2020-08-22 22:14:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-08-22 22:14:02,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2020-08-22 22:14:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-22 22:14:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 442 transitions. [2020-08-22 22:14:02,237 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 442 transitions. Word has length 80 [2020-08-22 22:14:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:02,237 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 442 transitions. [2020-08-22 22:14:02,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:02,238 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 442 transitions. [2020-08-22 22:14:02,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 22:14:02,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:02,241 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:14:02,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:14:02,242 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:02,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:02,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1261830773, now seen corresponding path program 1 times [2020-08-22 22:14:02,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:02,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395662283] [2020-08-22 22:14:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:02,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:02,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395662283] [2020-08-22 22:14:02,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:02,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:02,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419130245] [2020-08-22 22:14:02,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:02,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:02,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:02,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:02,316 INFO L87 Difference]: Start difference. First operand 323 states and 442 transitions. Second operand 3 states. [2020-08-22 22:14:02,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:02,392 INFO L93 Difference]: Finished difference Result 397 states and 552 transitions. [2020-08-22 22:14:02,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:02,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-08-22 22:14:02,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:02,396 INFO L225 Difference]: With dead ends: 397 [2020-08-22 22:14:02,397 INFO L226 Difference]: Without dead ends: 395 [2020-08-22 22:14:02,398 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 [2020-08-22 22:14:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-08-22 22:14:02,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 323. [2020-08-22 22:14:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-22 22:14:02,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 440 transitions. [2020-08-22 22:14:02,439 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 440 transitions. Word has length 80 [2020-08-22 22:14:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:02,440 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 440 transitions. [2020-08-22 22:14:02,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 440 transitions. [2020-08-22 22:14:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 22:14:02,444 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:02,444 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:14:02,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:14:02,445 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:02,445 INFO L82 PathProgramCache]: Analyzing trace with hash 397182858, now seen corresponding path program 1 times [2020-08-22 22:14:02,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:02,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332811491] [2020-08-22 22:14:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:02,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:02,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332811491] [2020-08-22 22:14:02,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:02,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:02,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269685371] [2020-08-22 22:14:02,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:02,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:02,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:02,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:02,556 INFO L87 Difference]: Start difference. First operand 323 states and 440 transitions. Second operand 3 states. [2020-08-22 22:14:02,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:02,597 INFO L93 Difference]: Finished difference Result 395 states and 546 transitions. [2020-08-22 22:14:02,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:02,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-08-22 22:14:02,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:02,601 INFO L225 Difference]: With dead ends: 395 [2020-08-22 22:14:02,601 INFO L226 Difference]: Without dead ends: 393 [2020-08-22 22:14:02,602 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 [2020-08-22 22:14:02,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-08-22 22:14:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 323. [2020-08-22 22:14:02,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-22 22:14:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 438 transitions. [2020-08-22 22:14:02,634 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 438 transitions. Word has length 81 [2020-08-22 22:14:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:02,634 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 438 transitions. [2020-08-22 22:14:02,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 438 transitions. [2020-08-22 22:14:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 22:14:02,638 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:02,638 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:14:02,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:14:02,638 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash -172878236, now seen corresponding path program 1 times [2020-08-22 22:14:02,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:02,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187688043] [2020-08-22 22:14:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:02,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:02,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187688043] [2020-08-22 22:14:02,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:02,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:02,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989678756] [2020-08-22 22:14:02,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:02,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:02,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:02,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:02,735 INFO L87 Difference]: Start difference. First operand 323 states and 438 transitions. Second operand 3 states. [2020-08-22 22:14:02,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:02,810 INFO L93 Difference]: Finished difference Result 859 states and 1200 transitions. [2020-08-22 22:14:02,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:02,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-08-22 22:14:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:02,816 INFO L225 Difference]: With dead ends: 859 [2020-08-22 22:14:02,816 INFO L226 Difference]: Without dead ends: 585 [2020-08-22 22:14:02,822 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 [2020-08-22 22:14:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-08-22 22:14:02,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 583. [2020-08-22 22:14:02,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-08-22 22:14:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 802 transitions. [2020-08-22 22:14:02,878 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 802 transitions. Word has length 81 [2020-08-22 22:14:02,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:02,879 INFO L479 AbstractCegarLoop]: Abstraction has 583 states and 802 transitions. [2020-08-22 22:14:02,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:02,879 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 802 transitions. [2020-08-22 22:14:02,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 22:14:02,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:02,887 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:14:02,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:14:02,887 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:02,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:02,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1064013698, now seen corresponding path program 1 times [2020-08-22 22:14:02,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:02,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396563537] [2020-08-22 22:14:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:02,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:02,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396563537] [2020-08-22 22:14:02,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:02,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:02,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414475456] [2020-08-22 22:14:02,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:02,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:02,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:02,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:02,950 INFO L87 Difference]: Start difference. First operand 583 states and 802 transitions. Second operand 3 states. [2020-08-22 22:14:03,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:03,075 INFO L93 Difference]: Finished difference Result 1627 states and 2276 transitions. [2020-08-22 22:14:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:03,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-08-22 22:14:03,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:03,083 INFO L225 Difference]: With dead ends: 1627 [2020-08-22 22:14:03,083 INFO L226 Difference]: Without dead ends: 1093 [2020-08-22 22:14:03,085 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 [2020-08-22 22:14:03,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2020-08-22 22:14:03,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1091. [2020-08-22 22:14:03,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2020-08-22 22:14:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1506 transitions. [2020-08-22 22:14:03,169 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1506 transitions. Word has length 82 [2020-08-22 22:14:03,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:03,170 INFO L479 AbstractCegarLoop]: Abstraction has 1091 states and 1506 transitions. [2020-08-22 22:14:03,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:03,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1506 transitions. [2020-08-22 22:14:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 22:14:03,172 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:03,173 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:14:03,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:14:03,173 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:03,174 INFO L82 PathProgramCache]: Analyzing trace with hash -637098359, now seen corresponding path program 1 times [2020-08-22 22:14:03,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:03,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232259159] [2020-08-22 22:14:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:03,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:03,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232259159] [2020-08-22 22:14:03,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:03,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:03,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501889145] [2020-08-22 22:14:03,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:03,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:03,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:03,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:03,264 INFO L87 Difference]: Start difference. First operand 1091 states and 1506 transitions. Second operand 3 states. [2020-08-22 22:14:03,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:03,358 INFO L93 Difference]: Finished difference Result 1343 states and 1876 transitions. [2020-08-22 22:14:03,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:03,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-08-22 22:14:03,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:03,366 INFO L225 Difference]: With dead ends: 1343 [2020-08-22 22:14:03,367 INFO L226 Difference]: Without dead ends: 1341 [2020-08-22 22:14:03,368 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 [2020-08-22 22:14:03,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2020-08-22 22:14:03,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1091. [2020-08-22 22:14:03,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2020-08-22 22:14:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1498 transitions. [2020-08-22 22:14:03,446 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1498 transitions. Word has length 82 [2020-08-22 22:14:03,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:03,447 INFO L479 AbstractCegarLoop]: Abstraction has 1091 states and 1498 transitions. [2020-08-22 22:14:03,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:03,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1498 transitions. [2020-08-22 22:14:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 22:14:03,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:03,455 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:14:03,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:14:03,456 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:03,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:03,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1659922654, now seen corresponding path program 1 times [2020-08-22 22:14:03,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:03,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197767186] [2020-08-22 22:14:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:03,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:03,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197767186] [2020-08-22 22:14:03,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:03,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:03,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178335422] [2020-08-22 22:14:03,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:03,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:03,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:03,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:03,550 INFO L87 Difference]: Start difference. First operand 1091 states and 1498 transitions. Second operand 3 states. [2020-08-22 22:14:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:03,641 INFO L93 Difference]: Finished difference Result 1335 states and 1852 transitions. [2020-08-22 22:14:03,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:03,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-08-22 22:14:03,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:03,649 INFO L225 Difference]: With dead ends: 1335 [2020-08-22 22:14:03,650 INFO L226 Difference]: Without dead ends: 1333 [2020-08-22 22:14:03,651 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 [2020-08-22 22:14:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2020-08-22 22:14:03,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1091. [2020-08-22 22:14:03,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2020-08-22 22:14:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1490 transitions. [2020-08-22 22:14:03,731 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1490 transitions. Word has length 83 [2020-08-22 22:14:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:03,731 INFO L479 AbstractCegarLoop]: Abstraction has 1091 states and 1490 transitions. [2020-08-22 22:14:03,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1490 transitions. [2020-08-22 22:14:03,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 22:14:03,733 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:03,733 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:14:03,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:14:03,734 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:03,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:03,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1375558424, now seen corresponding path program 1 times [2020-08-22 22:14:03,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:03,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050577573] [2020-08-22 22:14:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:03,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:03,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050577573] [2020-08-22 22:14:03,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:03,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:03,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695544391] [2020-08-22 22:14:03,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:03,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:03,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:03,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:03,790 INFO L87 Difference]: Start difference. First operand 1091 states and 1490 transitions. Second operand 3 states. [2020-08-22 22:14:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:03,951 INFO L93 Difference]: Finished difference Result 3127 states and 4308 transitions. [2020-08-22 22:14:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:03,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-08-22 22:14:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:03,962 INFO L225 Difference]: With dead ends: 3127 [2020-08-22 22:14:03,963 INFO L226 Difference]: Without dead ends: 2085 [2020-08-22 22:14:03,966 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 [2020-08-22 22:14:03,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2020-08-22 22:14:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 2083. [2020-08-22 22:14:04,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2020-08-22 22:14:04,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 2834 transitions. [2020-08-22 22:14:04,094 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 2834 transitions. Word has length 83 [2020-08-22 22:14:04,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:04,095 INFO L479 AbstractCegarLoop]: Abstraction has 2083 states and 2834 transitions. [2020-08-22 22:14:04,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:04,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 2834 transitions. [2020-08-22 22:14:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 22:14:04,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:04,098 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:14:04,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:14:04,098 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:04,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:04,099 INFO L82 PathProgramCache]: Analyzing trace with hash -146869603, now seen corresponding path program 1 times [2020-08-22 22:14:04,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:04,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59052813] [2020-08-22 22:14:04,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:04,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:04,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59052813] [2020-08-22 22:14:04,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:04,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:04,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776271927] [2020-08-22 22:14:04,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:04,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:04,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:04,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:04,135 INFO L87 Difference]: Start difference. First operand 2083 states and 2834 transitions. Second operand 3 states. [2020-08-22 22:14:04,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:04,280 INFO L93 Difference]: Finished difference Result 2535 states and 3476 transitions. [2020-08-22 22:14:04,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:04,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-08-22 22:14:04,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:04,295 INFO L225 Difference]: With dead ends: 2535 [2020-08-22 22:14:04,295 INFO L226 Difference]: Without dead ends: 2533 [2020-08-22 22:14:04,297 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 [2020-08-22 22:14:04,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2020-08-22 22:14:04,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2083. [2020-08-22 22:14:04,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2020-08-22 22:14:04,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 2818 transitions. [2020-08-22 22:14:04,455 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 2818 transitions. Word has length 84 [2020-08-22 22:14:04,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:04,456 INFO L479 AbstractCegarLoop]: Abstraction has 2083 states and 2818 transitions. [2020-08-22 22:14:04,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:04,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 2818 transitions. [2020-08-22 22:14:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 22:14:04,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:04,459 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:14:04,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:14:04,459 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:04,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:04,460 INFO L82 PathProgramCache]: Analyzing trace with hash -307116750, now seen corresponding path program 1 times [2020-08-22 22:14:04,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:04,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968554948] [2020-08-22 22:14:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:04,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:04,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968554948] [2020-08-22 22:14:04,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:04,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:04,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934545834] [2020-08-22 22:14:04,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:04,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:04,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:04,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:04,504 INFO L87 Difference]: Start difference. First operand 2083 states and 2818 transitions. Second operand 3 states. [2020-08-22 22:14:04,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:04,772 INFO L93 Difference]: Finished difference Result 6055 states and 8228 transitions. [2020-08-22 22:14:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:04,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-08-22 22:14:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:04,798 INFO L225 Difference]: With dead ends: 6055 [2020-08-22 22:14:04,798 INFO L226 Difference]: Without dead ends: 4021 [2020-08-22 22:14:04,807 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 [2020-08-22 22:14:04,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2020-08-22 22:14:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 4019. [2020-08-22 22:14:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4019 states. [2020-08-22 22:14:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4019 states to 4019 states and 5394 transitions. [2020-08-22 22:14:05,122 INFO L78 Accepts]: Start accepts. Automaton has 4019 states and 5394 transitions. Word has length 84 [2020-08-22 22:14:05,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:05,122 INFO L479 AbstractCegarLoop]: Abstraction has 4019 states and 5394 transitions. [2020-08-22 22:14:05,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:05,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4019 states and 5394 transitions. [2020-08-22 22:14:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 22:14:05,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:05,127 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:14:05,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:14:05,127 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:05,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:05,128 INFO L82 PathProgramCache]: Analyzing trace with hash -322854350, now seen corresponding path program 1 times [2020-08-22 22:14:05,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:05,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294679293] [2020-08-22 22:14:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:05,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:05,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294679293] [2020-08-22 22:14:05,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:05,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:05,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851202331] [2020-08-22 22:14:05,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:05,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:05,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:05,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:05,173 INFO L87 Difference]: Start difference. First operand 4019 states and 5394 transitions. Second operand 3 states. [2020-08-22 22:14:05,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:05,467 INFO L93 Difference]: Finished difference Result 4855 states and 6548 transitions. [2020-08-22 22:14:05,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:05,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-08-22 22:14:05,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:05,492 INFO L225 Difference]: With dead ends: 4855 [2020-08-22 22:14:05,492 INFO L226 Difference]: Without dead ends: 4853 [2020-08-22 22:14:05,495 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 [2020-08-22 22:14:05,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4853 states. [2020-08-22 22:14:05,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4853 to 4019. [2020-08-22 22:14:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4019 states. [2020-08-22 22:14:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4019 states to 4019 states and 5362 transitions. [2020-08-22 22:14:05,790 INFO L78 Accepts]: Start accepts. Automaton has 4019 states and 5362 transitions. Word has length 85 [2020-08-22 22:14:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:05,790 INFO L479 AbstractCegarLoop]: Abstraction has 4019 states and 5362 transitions. [2020-08-22 22:14:05,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4019 states and 5362 transitions. [2020-08-22 22:14:05,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 22:14:05,794 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:05,794 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:14:05,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 22:14:05,794 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:05,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:05,795 INFO L82 PathProgramCache]: Analyzing trace with hash -930439220, now seen corresponding path program 1 times [2020-08-22 22:14:05,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:05,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398002395] [2020-08-22 22:14:05,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:05,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:05,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398002395] [2020-08-22 22:14:05,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:05,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:05,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501636735] [2020-08-22 22:14:05,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:05,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:05,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:05,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:05,827 INFO L87 Difference]: Start difference. First operand 4019 states and 5362 transitions. Second operand 3 states. [2020-08-22 22:14:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:06,438 INFO L93 Difference]: Finished difference Result 11767 states and 15732 transitions. [2020-08-22 22:14:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:06,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-08-22 22:14:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:06,472 INFO L225 Difference]: With dead ends: 11767 [2020-08-22 22:14:06,473 INFO L226 Difference]: Without dead ends: 7797 [2020-08-22 22:14:06,481 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 [2020-08-22 22:14:06,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7797 states. [2020-08-22 22:14:07,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7797 to 7795. [2020-08-22 22:14:07,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7795 states. [2020-08-22 22:14:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 10290 transitions. [2020-08-22 22:14:07,032 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 10290 transitions. Word has length 85 [2020-08-22 22:14:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:07,032 INFO L479 AbstractCegarLoop]: Abstraction has 7795 states and 10290 transitions. [2020-08-22 22:14:07,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 10290 transitions. [2020-08-22 22:14:07,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 22:14:07,038 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:07,039 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:14:07,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 22:14:07,039 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:07,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:07,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1483413839, now seen corresponding path program 1 times [2020-08-22 22:14:07,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:07,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695297309] [2020-08-22 22:14:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:07,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:07,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695297309] [2020-08-22 22:14:07,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:07,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:07,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720797517] [2020-08-22 22:14:07,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:07,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:07,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:07,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:07,074 INFO L87 Difference]: Start difference. First operand 7795 states and 10290 transitions. Second operand 3 states. [2020-08-22 22:14:07,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:07,516 INFO L93 Difference]: Finished difference Result 9335 states and 12340 transitions. [2020-08-22 22:14:07,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:07,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-08-22 22:14:07,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:07,542 INFO L225 Difference]: With dead ends: 9335 [2020-08-22 22:14:07,542 INFO L226 Difference]: Without dead ends: 9333 [2020-08-22 22:14:07,547 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 [2020-08-22 22:14:07,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9333 states. [2020-08-22 22:14:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9333 to 7795. [2020-08-22 22:14:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7795 states. [2020-08-22 22:14:08,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 10226 transitions. [2020-08-22 22:14:08,077 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 10226 transitions. Word has length 86 [2020-08-22 22:14:08,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:08,077 INFO L479 AbstractCegarLoop]: Abstraction has 7795 states and 10226 transitions. [2020-08-22 22:14:08,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 10226 transitions. [2020-08-22 22:14:08,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 22:14:08,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:08,084 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:14:08,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 22:14:08,084 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:08,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:08,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1221401062, now seen corresponding path program 1 times [2020-08-22 22:14:08,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:08,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325393389] [2020-08-22 22:14:08,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:08,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:08,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325393389] [2020-08-22 22:14:08,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:08,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:08,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418087555] [2020-08-22 22:14:08,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:08,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:08,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:08,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:08,116 INFO L87 Difference]: Start difference. First operand 7795 states and 10226 transitions. Second operand 3 states. [2020-08-22 22:14:09,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:09,367 INFO L93 Difference]: Finished difference Result 22903 states and 30068 transitions. [2020-08-22 22:14:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:09,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-08-22 22:14:09,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:09,404 INFO L225 Difference]: With dead ends: 22903 [2020-08-22 22:14:09,404 INFO L226 Difference]: Without dead ends: 15157 [2020-08-22 22:14:09,442 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 [2020-08-22 22:14:09,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15157 states. [2020-08-22 22:14:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15157 to 15155. [2020-08-22 22:14:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15155 states. [2020-08-22 22:14:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15155 states to 15155 states and 19634 transitions. [2020-08-22 22:14:10,287 INFO L78 Accepts]: Start accepts. Automaton has 15155 states and 19634 transitions. Word has length 86 [2020-08-22 22:14:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:10,287 INFO L479 AbstractCegarLoop]: Abstraction has 15155 states and 19634 transitions. [2020-08-22 22:14:10,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 15155 states and 19634 transitions. [2020-08-22 22:14:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 22:14:10,299 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:10,299 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, 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, 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] [2020-08-22 22:14:10,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 22:14:10,299 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:10,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:10,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1193948038, now seen corresponding path program 1 times [2020-08-22 22:14:10,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:10,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154183187] [2020-08-22 22:14:10,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:10,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:10,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154183187] [2020-08-22 22:14:10,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:10,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:10,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913524729] [2020-08-22 22:14:10,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:10,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:10,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:10,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:10,329 INFO L87 Difference]: Start difference. First operand 15155 states and 19634 transitions. Second operand 3 states. [2020-08-22 22:14:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:11,715 INFO L93 Difference]: Finished difference Result 17975 states and 23220 transitions. [2020-08-22 22:14:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:11,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-08-22 22:14:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:11,767 INFO L225 Difference]: With dead ends: 17975 [2020-08-22 22:14:11,767 INFO L226 Difference]: Without dead ends: 17973 [2020-08-22 22:14:11,780 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 [2020-08-22 22:14:11,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17973 states. [2020-08-22 22:14:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17973 to 15155. [2020-08-22 22:14:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15155 states. [2020-08-22 22:14:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15155 states to 15155 states and 19506 transitions. [2020-08-22 22:14:12,621 INFO L78 Accepts]: Start accepts. Automaton has 15155 states and 19506 transitions. Word has length 87 [2020-08-22 22:14:12,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:12,621 INFO L479 AbstractCegarLoop]: Abstraction has 15155 states and 19506 transitions. [2020-08-22 22:14:12,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:12,622 INFO L276 IsEmpty]: Start isEmpty. Operand 15155 states and 19506 transitions. [2020-08-22 22:14:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 22:14:12,635 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:12,635 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, 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, 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] [2020-08-22 22:14:12,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 22:14:12,636 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:12,636 INFO L82 PathProgramCache]: Analyzing trace with hash -791026560, now seen corresponding path program 1 times [2020-08-22 22:14:12,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:12,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027321341] [2020-08-22 22:14:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:12,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:12,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027321341] [2020-08-22 22:14:12,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:12,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:12,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266531547] [2020-08-22 22:14:12,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:12,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:12,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:12,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:12,671 INFO L87 Difference]: Start difference. First operand 15155 states and 19506 transitions. Second operand 3 states. [2020-08-22 22:14:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:14,610 INFO L93 Difference]: Finished difference Result 44599 states and 57396 transitions. [2020-08-22 22:14:14,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:14,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-08-22 22:14:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:14,696 INFO L225 Difference]: With dead ends: 44599 [2020-08-22 22:14:14,696 INFO L226 Difference]: Without dead ends: 29493 [2020-08-22 22:14:14,738 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 [2020-08-22 22:14:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29493 states. [2020-08-22 22:14:16,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29493 to 29491. [2020-08-22 22:14:16,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29491 states. [2020-08-22 22:14:16,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29491 states to 29491 states and 37426 transitions. [2020-08-22 22:14:16,853 INFO L78 Accepts]: Start accepts. Automaton has 29491 states and 37426 transitions. Word has length 87 [2020-08-22 22:14:16,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:16,854 INFO L479 AbstractCegarLoop]: Abstraction has 29491 states and 37426 transitions. [2020-08-22 22:14:16,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:16,854 INFO L276 IsEmpty]: Start isEmpty. Operand 29491 states and 37426 transitions. [2020-08-22 22:14:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 22:14:16,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:16,872 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, 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, 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] [2020-08-22 22:14:16,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 22:14:16,872 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:16,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:16,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1707179323, now seen corresponding path program 1 times [2020-08-22 22:14:16,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:16,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946374543] [2020-08-22 22:14:16,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:16,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:16,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946374543] [2020-08-22 22:14:16,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:16,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:16,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879915022] [2020-08-22 22:14:16,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:16,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:16,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:16,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:16,909 INFO L87 Difference]: Start difference. First operand 29491 states and 37426 transitions. Second operand 3 states. [2020-08-22 22:14:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:18,336 INFO L93 Difference]: Finished difference Result 34615 states and 43572 transitions. [2020-08-22 22:14:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:18,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-08-22 22:14:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:18,399 INFO L225 Difference]: With dead ends: 34615 [2020-08-22 22:14:18,400 INFO L226 Difference]: Without dead ends: 34613 [2020-08-22 22:14:18,419 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 [2020-08-22 22:14:18,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34613 states. [2020-08-22 22:14:19,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34613 to 29491. [2020-08-22 22:14:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29491 states. [2020-08-22 22:14:19,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29491 states to 29491 states and 37170 transitions. [2020-08-22 22:14:19,996 INFO L78 Accepts]: Start accepts. Automaton has 29491 states and 37170 transitions. Word has length 88 [2020-08-22 22:14:19,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:19,996 INFO L479 AbstractCegarLoop]: Abstraction has 29491 states and 37170 transitions. [2020-08-22 22:14:19,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 29491 states and 37170 transitions. [2020-08-22 22:14:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 22:14:20,010 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:20,010 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, 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, 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] [2020-08-22 22:14:20,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 22:14:20,011 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:20,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:20,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1248226970, now seen corresponding path program 1 times [2020-08-22 22:14:20,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:20,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677264457] [2020-08-22 22:14:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:20,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:20,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677264457] [2020-08-22 22:14:20,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:20,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:20,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94587069] [2020-08-22 22:14:20,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:20,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:20,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:20,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:20,047 INFO L87 Difference]: Start difference. First operand 29491 states and 37170 transitions. Second operand 3 states. [2020-08-22 22:14:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:23,633 INFO L93 Difference]: Finished difference Result 86839 states and 109364 transitions. [2020-08-22 22:14:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:23,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-08-22 22:14:23,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:23,710 INFO L225 Difference]: With dead ends: 86839 [2020-08-22 22:14:23,710 INFO L226 Difference]: Without dead ends: 57397 [2020-08-22 22:14:23,776 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 [2020-08-22 22:14:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57397 states. [2020-08-22 22:14:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57397 to 57395. [2020-08-22 22:14:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57395 states. [2020-08-22 22:14:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57395 states to 57395 states and 71218 transitions. [2020-08-22 22:14:26,436 INFO L78 Accepts]: Start accepts. Automaton has 57395 states and 71218 transitions. Word has length 88 [2020-08-22 22:14:26,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:26,436 INFO L479 AbstractCegarLoop]: Abstraction has 57395 states and 71218 transitions. [2020-08-22 22:14:26,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:26,436 INFO L276 IsEmpty]: Start isEmpty. Operand 57395 states and 71218 transitions. [2020-08-22 22:14:26,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 22:14:26,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:26,458 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, 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, 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, 1, 1, 1, 1, 1] [2020-08-22 22:14:26,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 22:14:26,459 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:26,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:26,459 INFO L82 PathProgramCache]: Analyzing trace with hash 40577332, now seen corresponding path program 1 times [2020-08-22 22:14:26,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:26,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805146855] [2020-08-22 22:14:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:26,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:26,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805146855] [2020-08-22 22:14:26,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:26,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:26,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408457616] [2020-08-22 22:14:26,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:26,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:26,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:26,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:26,492 INFO L87 Difference]: Start difference. First operand 57395 states and 71218 transitions. Second operand 3 states. [2020-08-22 22:14:33,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:33,189 INFO L93 Difference]: Finished difference Result 169015 states and 209460 transitions. [2020-08-22 22:14:33,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:33,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-22 22:14:33,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:33,328 INFO L225 Difference]: With dead ends: 169015 [2020-08-22 22:14:33,328 INFO L226 Difference]: Without dead ends: 85301 [2020-08-22 22:14:33,426 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 [2020-08-22 22:14:33,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85301 states. [2020-08-22 22:14:37,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85301 to 85299. [2020-08-22 22:14:37,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85299 states. [2020-08-22 22:14:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85299 states to 85299 states and 103218 transitions. [2020-08-22 22:14:37,981 INFO L78 Accepts]: Start accepts. Automaton has 85299 states and 103218 transitions. Word has length 89 [2020-08-22 22:14:37,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:37,982 INFO L479 AbstractCegarLoop]: Abstraction has 85299 states and 103218 transitions. [2020-08-22 22:14:37,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:37,982 INFO L276 IsEmpty]: Start isEmpty. Operand 85299 states and 103218 transitions. [2020-08-22 22:14:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 22:14:38,012 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:38,013 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, 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, 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] [2020-08-22 22:14:38,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 22:14:38,013 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:38,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:38,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1447813926, now seen corresponding path program 1 times [2020-08-22 22:14:38,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:38,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409434813] [2020-08-22 22:14:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:38,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:38,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409434813] [2020-08-22 22:14:38,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:38,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:38,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090734970] [2020-08-22 22:14:38,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:38,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:38,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:38,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:38,047 INFO L87 Difference]: Start difference. First operand 85299 states and 103218 transitions. Second operand 3 states. [2020-08-22 22:14:43,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:43,367 INFO L93 Difference]: Finished difference Result 94519 states and 112948 transitions. [2020-08-22 22:14:43,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:43,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-22 22:14:43,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:43,481 INFO L225 Difference]: With dead ends: 94519 [2020-08-22 22:14:43,481 INFO L226 Difference]: Without dead ends: 66613 [2020-08-22 22:14:43,532 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 [2020-08-22 22:14:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66613 states. [2020-08-22 22:14:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66613 to 57395. [2020-08-22 22:14:46,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57395 states. [2020-08-22 22:14:46,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57395 states to 57395 states and 68658 transitions. [2020-08-22 22:14:46,474 INFO L78 Accepts]: Start accepts. Automaton has 57395 states and 68658 transitions. Word has length 89 [2020-08-22 22:14:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:46,475 INFO L479 AbstractCegarLoop]: Abstraction has 57395 states and 68658 transitions. [2020-08-22 22:14:46,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand 57395 states and 68658 transitions. [2020-08-22 22:14:46,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-22 22:14:46,495 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:14:46,495 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, 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, 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] [2020-08-22 22:14:46,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 22:14:46,495 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:14:46,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:14:46,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1997420839, now seen corresponding path program 1 times [2020-08-22 22:14:46,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:14:46,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894552638] [2020-08-22 22:14:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:14:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:46,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:14:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:14:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:14:46,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894552638] [2020-08-22 22:14:46,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:14:46,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:14:46,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313823386] [2020-08-22 22:14:46,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:14:46,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:14:46,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:14:46,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:14:46,532 INFO L87 Difference]: Start difference. First operand 57395 states and 68658 transitions. Second operand 3 states. [2020-08-22 22:14:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:14:49,157 INFO L93 Difference]: Finished difference Result 57395 states and 68658 transitions. [2020-08-22 22:14:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:14:49,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-08-22 22:14:49,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:14:49,159 INFO L225 Difference]: With dead ends: 57395 [2020-08-22 22:14:49,159 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 22:14:49,226 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 [2020-08-22 22:14:49,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 22:14:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 22:14:49,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 22:14:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 22:14:49,227 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2020-08-22 22:14:49,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:14:49,227 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 22:14:49,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:14:49,228 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 22:14:49,228 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 22:14:49,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 22:14:49,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 22:14:56,012 WARN L193 SmtUtils]: Spent 6.63 s on a formula simplification. DAG size of input: 2085 DAG size of output: 91 [2020-08-22 22:14:56,890 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 1051 DAG size of output: 15 [2020-08-22 22:15:07,020 WARN L193 SmtUtils]: Spent 10.12 s on a formula simplification. DAG size of input: 3629 DAG size of output: 15 [2020-08-22 22:15:10,978 WARN L193 SmtUtils]: Spent 3.95 s on a formula simplification. DAG size of input: 1071 DAG size of output: 553 [2020-08-22 22:15:17,788 WARN L193 SmtUtils]: Spent 6.80 s on a formula simplification. DAG size of input: 4137 DAG size of output: 3 [2020-08-22 22:15:23,422 WARN L193 SmtUtils]: Spent 5.62 s on a formula simplification. DAG size of input: 2089 DAG size of output: 291 [2020-08-22 22:15:24,126 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 1055 DAG size of output: 35 [2020-08-22 22:15:28,237 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 2146 DAG size of output: 159 [2020-08-22 22:15:29,113 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 1167 DAG size of output: 57 [2020-08-22 22:15:30,207 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 1453 DAG size of output: 25 [2020-08-22 22:15:46,327 WARN L193 SmtUtils]: Spent 16.11 s on a formula simplification. DAG size of input: 2093 DAG size of output: 1067 [2020-08-22 22:15:47,264 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification. DAG size of input: 1059 DAG size of output: 91 [2020-08-22 22:15:55,701 WARN L193 SmtUtils]: Spent 8.43 s on a formula simplification that was a NOOP. DAG size: 1069 [2020-08-22 22:16:04,889 WARN L193 SmtUtils]: Spent 9.18 s on a formula simplification. DAG size of input: 5162 DAG size of output: 7 [2020-08-22 22:16:07,166 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 1078 DAG size of output: 293 [2020-08-22 22:16:09,561 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 2073 DAG size of output: 7 [2020-08-22 22:16:11,671 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 1063 DAG size of output: 291 [2020-08-22 22:16:15,014 WARN L193 SmtUtils]: Spent 3.33 s on a formula simplification. DAG size of input: 2193 DAG size of output: 91 [2020-08-22 22:16:15,861 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 1262 DAG size of output: 37 [2020-08-22 22:16:18,016 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 1836 DAG size of output: 17 [2020-08-22 22:16:20,602 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 2079 DAG size of output: 23 [2020-08-22 22:16:27,916 WARN L193 SmtUtils]: Spent 7.31 s on a formula simplification that was a NOOP. DAG size: 1067 [2020-08-22 22:16:31,996 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 1071 DAG size of output: 553 [2020-08-22 22:16:33,433 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 1089 DAG size of output: 161 [2020-08-22 22:16:36,376 WARN L193 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 2083 DAG size of output: 55 [2020-08-22 22:16:36,998 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 1047 DAG size of output: 7 [2020-08-22 22:16:40,006 WARN L193 SmtUtils]: Spent 3.00 s on a formula simplification. DAG size of input: 2288 DAG size of output: 55 [2020-08-22 22:16:41,143 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 1453 DAG size of output: 25 [2020-08-22 22:16:47,528 WARN L193 SmtUtils]: Spent 6.38 s on a formula simplification. DAG size of input: 2603 DAG size of output: 11 [2020-08-22 22:16:51,724 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 2087 DAG size of output: 159 [2020-08-22 22:16:52,377 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 1053 DAG size of output: 23 [2020-08-22 22:17:09,337 WARN L193 SmtUtils]: Spent 16.95 s on a formula simplification. DAG size of input: 2100 DAG size of output: 1067 [2020-08-22 22:17:11,577 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 1078 DAG size of output: 293 [2020-08-22 22:17:12,597 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 1120 DAG size of output: 93 [2020-08-22 22:17:22,046 WARN L193 SmtUtils]: Spent 9.44 s on a formula simplification. DAG size of input: 2091 DAG size of output: 551 [2020-08-22 22:17:22,840 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 1057 DAG size of output: 55 [2020-08-22 22:17:25,996 WARN L193 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 2479 DAG size of output: 35 [2020-08-22 22:17:28,181 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 1836 DAG size of output: 17 [2020-08-22 22:17:35,598 WARN L193 SmtUtils]: Spent 7.41 s on a formula simplification. DAG size of input: 4137 DAG size of output: 3 [2020-08-22 22:18:10,236 WARN L193 SmtUtils]: Spent 34.62 s on a formula simplification that was a NOOP. DAG size: 2095 [2020-08-22 22:18:20,032 WARN L193 SmtUtils]: Spent 9.79 s on a formula simplification. DAG size of input: 2104 DAG size of output: 551 [2020-08-22 22:18:21,434 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 1061 DAG size of output: 159 [2020-08-22 22:18:22,825 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 1089 DAG size of output: 161 [2020-08-22 22:18:23,689 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 1167 DAG size of output: 57 [2020-08-22 22:18:26,275 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 2077 DAG size of output: 15 [2020-08-22 22:18:29,989 WARN L193 SmtUtils]: Spent 3.71 s on a formula simplification. DAG size of input: 1065 DAG size of output: 551 [2020-08-22 22:18:34,459 WARN L193 SmtUtils]: Spent 4.46 s on a formula simplification. DAG size of input: 2862 DAG size of output: 23 [2020-08-22 22:18:42,922 WARN L193 SmtUtils]: Spent 8.46 s on a formula simplification that was a NOOP. DAG size: 1069 [2020-08-22 22:18:49,627 WARN L193 SmtUtils]: Spent 6.70 s on a formula simplification. DAG size of input: 2603 DAG size of output: 11 [2020-08-22 22:18:52,269 WARN L193 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 2081 DAG size of output: 35 [2020-08-22 22:18:57,961 WARN L193 SmtUtils]: Spent 5.69 s on a formula simplification. DAG size of input: 2127 DAG size of output: 291 [2020-08-22 22:18:58,988 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1120 DAG size of output: 93 [2020-08-22 22:18:59,872 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 1262 DAG size of output: 37 [2020-08-22 22:19:00,856 WARN L193 SmtUtils]: Spent 978.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-08-22 22:19:29,760 WARN L193 SmtUtils]: Spent 28.84 s on a formula simplification that was a NOOP. DAG size: 553 [2020-08-22 22:19:37,541 WARN L193 SmtUtils]: Spent 7.77 s on a formula simplification that was a NOOP. DAG size: 291 [2020-08-22 22:19:37,666 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-08-22 22:19:40,104 WARN L193 SmtUtils]: Spent 2.44 s on a formula simplification that was a NOOP. DAG size: 159 [2020-08-22 22:19:40,486 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-08-22 22:21:18,721 WARN L193 SmtUtils]: Spent 1.64 m on a formula simplification that was a NOOP. DAG size: 1067 [2020-08-22 22:21:19,604 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-08-22 22:23:08,935 WARN L193 SmtUtils]: Spent 1.82 m on a formula simplification that was a NOOP. DAG size: 1069 [2020-08-22 22:23:17,611 WARN L193 SmtUtils]: Spent 8.66 s on a formula simplification that was a NOOP. DAG size: 293 [2020-08-22 22:23:25,563 WARN L193 SmtUtils]: Spent 7.93 s on a formula simplification that was a NOOP. DAG size: 291 [2020-08-22 22:23:26,446 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-08-22 22:23:26,601 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-08-22 22:25:05,082 WARN L193 SmtUtils]: Spent 1.64 m on a formula simplification that was a NOOP. DAG size: 1067 [2020-08-22 22:25:32,647 WARN L193 SmtUtils]: Spent 27.55 s on a formula simplification that was a NOOP. DAG size: 553 [2020-08-22 22:25:35,296 WARN L193 SmtUtils]: Spent 2.64 s on a formula simplification that was a NOOP. DAG size: 161 [2020-08-22 22:25:35,603 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-08-22 22:25:35,910 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-08-22 22:25:38,339 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification that was a NOOP. DAG size: 159 [2020-08-22 22:27:12,399 WARN L193 SmtUtils]: Spent 1.57 m on a formula simplification that was a NOOP. DAG size: 1067 [2020-08-22 22:27:20,598 WARN L193 SmtUtils]: Spent 8.19 s on a formula simplification that was a NOOP. DAG size: 293 [2020-08-22 22:27:21,540 WARN L193 SmtUtils]: Spent 940.00 ms on a formula simplification that was a NOOP. DAG size: 93