/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:59:29,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:59:29,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:59:29,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:59:29,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:59:29,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:59:29,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:59:29,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:59:29,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:59:29,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:59:29,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:59:29,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:59:29,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:59:29,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:59:29,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:59:29,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:59:29,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:59:29,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:59:29,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:59:29,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:59:29,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:59:29,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:59:29,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:59:29,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:59:29,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:59:29,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:59:29,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:59:29,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:59:29,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:59:29,619 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:59:29,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:59:29,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:59:29,623 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:59:29,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:59:29,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:59:29,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:59:29,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:59:29,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:59:29,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:59:29,625 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:59:29,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:59:29,626 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:59:29,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:59:29,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:59:29,627 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:59:29,627 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:59:29,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:59:29,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:59:29,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:59:29,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:59:29,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:59:29,628 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:59:29,912 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:59:29,930 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:59:29,934 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:59:29,936 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:59:29,936 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:59:29,937 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-07-07 13:59:30,017 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb8d4f6c4/6c1a23ea4f494faa98d0c94fe72a69bc/FLAG47ceb30c2 [2020-07-07 13:59:30,538 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:59:30,539 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-07-07 13:59:30,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb8d4f6c4/6c1a23ea4f494faa98d0c94fe72a69bc/FLAG47ceb30c2 [2020-07-07 13:59:30,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb8d4f6c4/6c1a23ea4f494faa98d0c94fe72a69bc [2020-07-07 13:59:30,902 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:59:30,904 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:59:30,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:59:30,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:59:30,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:59:30,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:59:30" (1/1) ... [2020-07-07 13:59:30,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7779094a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:30, skipping insertion in model container [2020-07-07 13:59:30,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:59:30" (1/1) ... [2020-07-07 13:59:30,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:59:30,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:59:31,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:59:31,129 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:59:31,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:59:31,153 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:59:31,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:31 WrapperNode [2020-07-07 13:59:31,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:59:31,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:59:31,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:59:31,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:59:31,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:31" (1/1) ... [2020-07-07 13:59:31,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:31" (1/1) ... [2020-07-07 13:59:31,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:31" (1/1) ... [2020-07-07 13:59:31,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:31" (1/1) ... [2020-07-07 13:59:31,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:31" (1/1) ... [2020-07-07 13:59:31,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:31" (1/1) ... [2020-07-07 13:59:31,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:31" (1/1) ... [2020-07-07 13:59:31,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:59:31,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:59:31,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:59:31,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:59:31,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:31" (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 [2020-07-07 13:59:31,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:59:31,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:59:31,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:59:31,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:59:31,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:59:31,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:59:31,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:59:31,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:59:31,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:59:31,504 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:59:31,505 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 13:59:31,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:59:31 BoogieIcfgContainer [2020-07-07 13:59:31,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:59:31,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:59:31,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:59:31,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:59:31,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:59:30" (1/3) ... [2020-07-07 13:59:31,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d65170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:59:31, skipping insertion in model container [2020-07-07 13:59:31,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:31" (2/3) ... [2020-07-07 13:59:31,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d65170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:59:31, skipping insertion in model container [2020-07-07 13:59:31,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:59:31" (3/3) ... [2020-07-07 13:59:31,517 INFO L109 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2020-07-07 13:59:31,526 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:59:31,534 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:59:31,547 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:59:31,570 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:59:31,570 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:59:31,570 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:59:31,570 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:59:31,571 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:59:31,571 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:59:31,571 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:59:31,571 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:59:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-07 13:59:31,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-07 13:59:31,597 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:31,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:31,599 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:31,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:31,605 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-07-07 13:59:31,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:31,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549019530] [2020-07-07 13:59:31,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:31,728 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:31,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549019530] [2020-07-07 13:59:31,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:31,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 13:59:31,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285198192] [2020-07-07 13:59:31,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 13:59:31,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:31,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 13:59:31,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 13:59:31,757 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-07-07 13:59:31,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:31,793 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-07-07 13:59:31,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 13:59:31,795 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-07 13:59:31,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:31,804 INFO L225 Difference]: With dead ends: 33 [2020-07-07 13:59:31,804 INFO L226 Difference]: Without dead ends: 16 [2020-07-07 13:59:31,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 13:59:31,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-07 13:59:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-07 13:59:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-07 13:59:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-07-07 13:59:31,852 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-07-07 13:59:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:31,853 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-07-07 13:59:31,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 13:59:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-07-07 13:59:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-07 13:59:31,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:31,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:31,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:59:31,855 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:31,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:31,856 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times [2020-07-07 13:59:31,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:31,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619810786] [2020-07-07 13:59:31,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:31,975 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:31,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619810786] [2020-07-07 13:59:31,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:31,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:59:31,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085127986] [2020-07-07 13:59:31,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:59:31,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:31,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:59:31,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:59:31,979 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-07-07 13:59:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:32,007 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-07-07 13:59:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:59:32,008 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-07 13:59:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:32,010 INFO L225 Difference]: With dead ends: 25 [2020-07-07 13:59:32,010 INFO L226 Difference]: Without dead ends: 20 [2020-07-07 13:59:32,012 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 [2020-07-07 13:59:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-07 13:59:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-07-07 13:59:32,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-07 13:59:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-07 13:59:32,019 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-07-07 13:59:32,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:32,019 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-07 13:59:32,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:59:32,020 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-07 13:59:32,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 13:59:32,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:32,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:32,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:59:32,021 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:32,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:32,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times [2020-07-07 13:59:32,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:32,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763428550] [2020-07-07 13:59:32,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:32,260 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:32,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763428550] [2020-07-07 13:59:32,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:32,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:59:32,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748168432] [2020-07-07 13:59:32,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:59:32,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:32,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:59:32,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:59:32,263 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-07-07 13:59:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:32,365 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-07-07 13:59:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:59:32,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-07 13:59:32,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:32,367 INFO L225 Difference]: With dead ends: 30 [2020-07-07 13:59:32,367 INFO L226 Difference]: Without dead ends: 25 [2020-07-07 13:59:32,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:59:32,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-07 13:59:32,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-07-07 13:59:32,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-07 13:59:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-07-07 13:59:32,387 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-07-07 13:59:32,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:32,389 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-07-07 13:59:32,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:59:32,389 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-07-07 13:59:32,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 13:59:32,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:32,391 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:32,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:59:32,392 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:32,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times [2020-07-07 13:59:32,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:32,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7870491] [2020-07-07 13:59:32,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:32,574 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:32,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7870491] [2020-07-07 13:59:32,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:32,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:59:32,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128362665] [2020-07-07 13:59:32,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:59:32,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:32,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:59:32,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:59:32,577 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2020-07-07 13:59:32,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:32,727 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-07-07 13:59:32,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 13:59:32,727 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-07-07 13:59:32,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:32,730 INFO L225 Difference]: With dead ends: 35 [2020-07-07 13:59:32,730 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 13:59:32,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-07-07 13:59:32,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 13:59:32,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-07 13:59:32,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 13:59:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-07 13:59:32,751 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-07-07 13:59:32,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:32,752 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-07 13:59:32,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:59:32,752 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-07 13:59:32,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 13:59:32,753 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:32,754 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:32,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:59:32,755 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:32,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:32,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times [2020-07-07 13:59:32,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:32,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290999548] [2020-07-07 13:59:32,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:32,937 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:32,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290999548] [2020-07-07 13:59:32,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:32,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 13:59:32,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265369559] [2020-07-07 13:59:32,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 13:59:32,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:32,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 13:59:32,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:59:32,940 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states. [2020-07-07 13:59:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:33,097 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-07-07 13:59:33,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 13:59:33,098 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-07 13:59:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:33,099 INFO L225 Difference]: With dead ends: 40 [2020-07-07 13:59:33,099 INFO L226 Difference]: Without dead ends: 35 [2020-07-07 13:59:33,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-07-07 13:59:33,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-07 13:59:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-07 13:59:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 13:59:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-07-07 13:59:33,108 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-07-07 13:59:33,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:33,108 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-07-07 13:59:33,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 13:59:33,109 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-07-07 13:59:33,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 13:59:33,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:33,110 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:33,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:59:33,110 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:33,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:33,111 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times [2020-07-07 13:59:33,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:33,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38715299] [2020-07-07 13:59:33,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:33,339 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:33,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38715299] [2020-07-07 13:59:33,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:33,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 13:59:33,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248616182] [2020-07-07 13:59:33,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 13:59:33,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:33,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 13:59:33,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-07 13:59:33,342 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2020-07-07 13:59:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:33,565 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-07-07 13:59:33,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 13:59:33,567 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-07-07 13:59:33,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:33,568 INFO L225 Difference]: With dead ends: 45 [2020-07-07 13:59:33,568 INFO L226 Difference]: Without dead ends: 40 [2020-07-07 13:59:33,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-07-07 13:59:33,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-07 13:59:33,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-07-07 13:59:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-07 13:59:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-07-07 13:59:33,576 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-07-07 13:59:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:33,576 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-07-07 13:59:33,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 13:59:33,576 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-07-07 13:59:33,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-07 13:59:33,577 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:33,577 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:33,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:59:33,578 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:33,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:33,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times [2020-07-07 13:59:33,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:33,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238616680] [2020-07-07 13:59:33,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:33,808 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:33,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238616680] [2020-07-07 13:59:33,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:33,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 13:59:33,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859334851] [2020-07-07 13:59:33,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 13:59:33,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:33,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 13:59:33,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-07 13:59:33,811 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 13 states. [2020-07-07 13:59:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:34,109 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-07-07 13:59:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 13:59:34,110 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-07-07 13:59:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:34,111 INFO L225 Difference]: With dead ends: 50 [2020-07-07 13:59:34,111 INFO L226 Difference]: Without dead ends: 45 [2020-07-07 13:59:34,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-07-07 13:59:34,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-07 13:59:34,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-07-07 13:59:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 13:59:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-07-07 13:59:34,121 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-07-07 13:59:34,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:34,121 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-07-07 13:59:34,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 13:59:34,122 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-07-07 13:59:34,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-07 13:59:34,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:34,125 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:34,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 13:59:34,126 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:34,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:34,126 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times [2020-07-07 13:59:34,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:34,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97052624] [2020-07-07 13:59:34,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:34,364 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:34,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97052624] [2020-07-07 13:59:34,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:34,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-07 13:59:34,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688003709] [2020-07-07 13:59:34,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 13:59:34,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:34,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 13:59:34,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-07-07 13:59:34,367 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 15 states. [2020-07-07 13:59:34,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:34,741 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-07-07 13:59:34,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 13:59:34,742 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-07-07 13:59:34,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:34,743 INFO L225 Difference]: With dead ends: 55 [2020-07-07 13:59:34,743 INFO L226 Difference]: Without dead ends: 50 [2020-07-07 13:59:34,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-07-07 13:59:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-07 13:59:34,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-07-07 13:59:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-07 13:59:34,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-07-07 13:59:34,754 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-07-07 13:59:34,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:34,755 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-07-07 13:59:34,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 13:59:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-07-07 13:59:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-07 13:59:34,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:34,756 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:34,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 13:59:34,757 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:34,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:34,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1026024175, now seen corresponding path program 7 times [2020-07-07 13:59:34,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:34,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506715508] [2020-07-07 13:59:34,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:35,073 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:35,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506715508] [2020-07-07 13:59:35,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:35,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-07-07 13:59:35,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655040448] [2020-07-07 13:59:35,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 13:59:35,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:35,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 13:59:35,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-07-07 13:59:35,076 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 17 states. [2020-07-07 13:59:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:35,541 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-07-07 13:59:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 13:59:35,542 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-07-07 13:59:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:35,543 INFO L225 Difference]: With dead ends: 60 [2020-07-07 13:59:35,543 INFO L226 Difference]: Without dead ends: 55 [2020-07-07 13:59:35,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2020-07-07 13:59:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-07 13:59:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-07-07 13:59:35,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-07 13:59:35,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-07-07 13:59:35,553 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-07-07 13:59:35,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:35,554 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-07-07 13:59:35,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 13:59:35,554 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-07-07 13:59:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-07 13:59:35,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:35,555 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:35,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 13:59:35,556 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:35,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1033748417, now seen corresponding path program 8 times [2020-07-07 13:59:35,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:35,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388915052] [2020-07-07 13:59:35,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:35,966 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:35,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388915052] [2020-07-07 13:59:35,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:35,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-07-07 13:59:35,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984669713] [2020-07-07 13:59:35,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 13:59:35,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:35,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 13:59:35,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-07-07 13:59:35,969 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 19 states. [2020-07-07 13:59:36,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:36,627 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-07-07 13:59:36,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-07 13:59:36,630 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-07-07 13:59:36,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:36,631 INFO L225 Difference]: With dead ends: 65 [2020-07-07 13:59:36,631 INFO L226 Difference]: Without dead ends: 60 [2020-07-07 13:59:36,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 13:59:36,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-07 13:59:36,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-07-07 13:59:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 13:59:36,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-07-07 13:59:36,647 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-07-07 13:59:36,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:36,648 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-07-07 13:59:36,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 13:59:36,648 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-07-07 13:59:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-07 13:59:36,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:36,650 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:36,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 13:59:36,650 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:36,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:36,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1398950673, now seen corresponding path program 9 times [2020-07-07 13:59:36,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:36,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527955498] [2020-07-07 13:59:36,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:37,097 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:37,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527955498] [2020-07-07 13:59:37,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:37,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-07-07 13:59:37,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138514946] [2020-07-07 13:59:37,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 13:59:37,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:37,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 13:59:37,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-07-07 13:59:37,099 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 21 states. [2020-07-07 13:59:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:37,817 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-07-07 13:59:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 13:59:37,817 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-07-07 13:59:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:37,819 INFO L225 Difference]: With dead ends: 70 [2020-07-07 13:59:37,819 INFO L226 Difference]: Without dead ends: 65 [2020-07-07 13:59:37,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2020-07-07 13:59:37,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-07 13:59:37,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-07-07 13:59:37,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-07 13:59:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-07-07 13:59:37,830 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-07-07 13:59:37,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:37,831 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-07-07 13:59:37,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 13:59:37,831 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-07-07 13:59:37,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-07 13:59:37,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:37,832 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:37,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 13:59:37,832 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:37,833 INFO L82 PathProgramCache]: Analyzing trace with hash 230665791, now seen corresponding path program 10 times [2020-07-07 13:59:37,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:37,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343797983] [2020-07-07 13:59:37,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:38,340 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:38,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343797983] [2020-07-07 13:59:38,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:38,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-07-07 13:59:38,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355474250] [2020-07-07 13:59:38,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-07 13:59:38,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:38,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-07 13:59:38,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-07-07 13:59:38,343 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 23 states. [2020-07-07 13:59:39,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:39,200 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-07-07 13:59:39,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-07 13:59:39,200 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-07-07 13:59:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:39,201 INFO L225 Difference]: With dead ends: 75 [2020-07-07 13:59:39,202 INFO L226 Difference]: Without dead ends: 70 [2020-07-07 13:59:39,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 13:59:39,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-07 13:59:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-07-07 13:59:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-07 13:59:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-07-07 13:59:39,212 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-07-07 13:59:39,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:39,212 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-07-07 13:59:39,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-07 13:59:39,212 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-07-07 13:59:39,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-07 13:59:39,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:39,213 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:39,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 13:59:39,214 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:39,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1468725521, now seen corresponding path program 11 times [2020-07-07 13:59:39,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:39,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357152569] [2020-07-07 13:59:39,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:39,741 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:39,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357152569] [2020-07-07 13:59:39,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:39,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-07-07 13:59:39,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145481679] [2020-07-07 13:59:39,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-07 13:59:39,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:39,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-07 13:59:39,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-07-07 13:59:39,743 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 25 states. [2020-07-07 13:59:40,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:40,768 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-07-07 13:59:40,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-07 13:59:40,769 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2020-07-07 13:59:40,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:40,770 INFO L225 Difference]: With dead ends: 80 [2020-07-07 13:59:40,771 INFO L226 Difference]: Without dead ends: 75 [2020-07-07 13:59:40,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=1994, Unknown=0, NotChecked=0, Total=2162 [2020-07-07 13:59:40,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-07 13:59:40,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-07-07 13:59:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-07 13:59:40,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-07-07 13:59:40,781 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 66 [2020-07-07 13:59:40,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:40,782 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-07-07 13:59:40,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-07 13:59:40,782 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-07-07 13:59:40,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-07 13:59:40,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:40,783 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:40,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 13:59:40,784 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:40,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:40,784 INFO L82 PathProgramCache]: Analyzing trace with hash -844391361, now seen corresponding path program 12 times [2020-07-07 13:59:40,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:40,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610276966] [2020-07-07 13:59:40,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:41,327 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:41,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610276966] [2020-07-07 13:59:41,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:41,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-07-07 13:59:41,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8109663] [2020-07-07 13:59:41,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-07 13:59:41,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:41,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-07 13:59:41,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2020-07-07 13:59:41,330 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 27 states. [2020-07-07 13:59:42,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:42,515 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2020-07-07 13:59:42,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-07 13:59:42,515 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-07-07 13:59:42,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:42,516 INFO L225 Difference]: With dead ends: 85 [2020-07-07 13:59:42,516 INFO L226 Difference]: Without dead ends: 80 [2020-07-07 13:59:42,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=183, Invalid=2367, Unknown=0, NotChecked=0, Total=2550 [2020-07-07 13:59:42,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-07 13:59:42,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-07-07 13:59:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-07 13:59:42,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-07-07 13:59:42,526 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 71 [2020-07-07 13:59:42,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:42,526 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-07-07 13:59:42,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-07 13:59:42,526 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-07-07 13:59:42,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-07 13:59:42,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:42,528 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:42,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 13:59:42,528 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:42,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:42,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1154341103, now seen corresponding path program 13 times [2020-07-07 13:59:42,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:42,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214964264] [2020-07-07 13:59:42,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:43,116 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:43,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214964264] [2020-07-07 13:59:43,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:43,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-07-07 13:59:43,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489950318] [2020-07-07 13:59:43,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-07 13:59:43,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:43,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-07 13:59:43,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2020-07-07 13:59:43,119 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 29 states. [2020-07-07 13:59:44,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:44,502 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-07-07 13:59:44,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-07 13:59:44,503 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 76 [2020-07-07 13:59:44,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:44,503 INFO L225 Difference]: With dead ends: 90 [2020-07-07 13:59:44,504 INFO L226 Difference]: Without dead ends: 85 [2020-07-07 13:59:44,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=198, Invalid=2772, Unknown=0, NotChecked=0, Total=2970 [2020-07-07 13:59:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-07 13:59:44,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-07-07 13:59:44,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-07 13:59:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-07-07 13:59:44,513 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 76 [2020-07-07 13:59:44,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:44,513 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-07-07 13:59:44,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-07 13:59:44,514 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-07-07 13:59:44,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-07 13:59:44,515 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:44,515 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:44,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 13:59:44,515 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:44,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:44,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2113533377, now seen corresponding path program 14 times [2020-07-07 13:59:44,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:44,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937367027] [2020-07-07 13:59:44,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:45,272 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:45,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937367027] [2020-07-07 13:59:45,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:45,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-07-07 13:59:45,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085522144] [2020-07-07 13:59:45,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-07 13:59:45,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:45,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-07 13:59:45,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2020-07-07 13:59:45,275 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 31 states. [2020-07-07 13:59:46,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:46,866 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-07-07 13:59:46,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-07 13:59:46,867 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 81 [2020-07-07 13:59:46,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:46,869 INFO L225 Difference]: With dead ends: 95 [2020-07-07 13:59:46,869 INFO L226 Difference]: Without dead ends: 90 [2020-07-07 13:59:46,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=213, Invalid=3209, Unknown=0, NotChecked=0, Total=3422 [2020-07-07 13:59:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-07 13:59:46,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-07-07 13:59:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-07 13:59:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-07-07 13:59:46,899 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 81 [2020-07-07 13:59:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:46,899 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-07-07 13:59:46,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-07 13:59:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-07-07 13:59:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-07 13:59:46,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:46,902 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:46,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 13:59:46,903 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:46,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:46,907 INFO L82 PathProgramCache]: Analyzing trace with hash -305648913, now seen corresponding path program 15 times [2020-07-07 13:59:46,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:46,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792164125] [2020-07-07 13:59:46,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:47,991 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:47,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792164125] [2020-07-07 13:59:47,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:47,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-07-07 13:59:47,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179225379] [2020-07-07 13:59:47,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-07 13:59:47,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:47,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-07 13:59:47,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 13:59:47,995 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 33 states. [2020-07-07 13:59:50,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:50,082 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-07-07 13:59:50,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-07 13:59:50,082 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 86 [2020-07-07 13:59:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:50,083 INFO L225 Difference]: With dead ends: 100 [2020-07-07 13:59:50,083 INFO L226 Difference]: Without dead ends: 95 [2020-07-07 13:59:50,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=228, Invalid=3678, Unknown=0, NotChecked=0, Total=3906 [2020-07-07 13:59:50,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-07 13:59:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-07-07 13:59:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-07 13:59:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-07-07 13:59:50,092 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 86 [2020-07-07 13:59:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:50,094 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-07-07 13:59:50,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-07 13:59:50,094 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-07-07 13:59:50,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-07 13:59:50,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:50,097 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:50,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 13:59:50,098 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:50,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:50,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1387198527, now seen corresponding path program 16 times [2020-07-07 13:59:50,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:50,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818464901] [2020-07-07 13:59:50,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:51,330 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:51,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818464901] [2020-07-07 13:59:51,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:51,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-07-07 13:59:51,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378562711] [2020-07-07 13:59:51,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-07 13:59:51,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:51,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-07 13:59:51,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 13:59:51,333 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 35 states. [2020-07-07 13:59:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:53,365 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2020-07-07 13:59:53,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-07 13:59:53,365 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 91 [2020-07-07 13:59:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:53,366 INFO L225 Difference]: With dead ends: 105 [2020-07-07 13:59:53,366 INFO L226 Difference]: Without dead ends: 100 [2020-07-07 13:59:53,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=243, Invalid=4179, Unknown=0, NotChecked=0, Total=4422 [2020-07-07 13:59:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-07 13:59:53,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-07-07 13:59:53,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-07 13:59:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-07-07 13:59:53,378 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 91 [2020-07-07 13:59:53,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:53,378 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-07-07 13:59:53,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-07 13:59:53,378 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-07-07 13:59:53,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-07 13:59:53,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:53,380 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:53,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 13:59:53,380 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:53,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:53,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1736703215, now seen corresponding path program 17 times [2020-07-07 13:59:53,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:53,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947558570] [2020-07-07 13:59:53,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:54,396 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:54,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947558570] [2020-07-07 13:59:54,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:54,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-07-07 13:59:54,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62305772] [2020-07-07 13:59:54,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-07 13:59:54,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:54,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-07 13:59:54,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 13:59:54,398 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 37 states. [2020-07-07 13:59:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:56,719 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-07-07 13:59:56,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-07-07 13:59:56,721 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 96 [2020-07-07 13:59:56,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:56,722 INFO L225 Difference]: With dead ends: 110 [2020-07-07 13:59:56,722 INFO L226 Difference]: Without dead ends: 105 [2020-07-07 13:59:56,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=258, Invalid=4712, Unknown=0, NotChecked=0, Total=4970 [2020-07-07 13:59:56,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-07 13:59:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-07-07 13:59:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-07 13:59:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-07-07 13:59:56,730 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 96 [2020-07-07 13:59:56,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:56,730 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-07-07 13:59:56,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-07 13:59:56,731 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-07-07 13:59:56,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-07 13:59:56,732 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:56,732 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:56,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 13:59:56,732 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:56,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:56,733 INFO L82 PathProgramCache]: Analyzing trace with hash 260466239, now seen corresponding path program 18 times [2020-07-07 13:59:56,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:56,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247989866] [2020-07-07 13:59:56,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:57,860 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:57,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247989866] [2020-07-07 13:59:57,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:57,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-07-07 13:59:57,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79558134] [2020-07-07 13:59:57,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-07 13:59:57,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:57,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-07 13:59:57,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2020-07-07 13:59:57,862 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 39 states. [2020-07-07 14:00:00,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:00,495 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2020-07-07 14:00:00,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-07-07 14:00:00,496 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 101 [2020-07-07 14:00:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:00,497 INFO L225 Difference]: With dead ends: 115 [2020-07-07 14:00:00,497 INFO L226 Difference]: Without dead ends: 110 [2020-07-07 14:00:00,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=273, Invalid=5277, Unknown=0, NotChecked=0, Total=5550 [2020-07-07 14:00:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-07 14:00:00,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-07-07 14:00:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-07 14:00:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-07 14:00:00,506 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 101 [2020-07-07 14:00:00,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:00,507 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-07 14:00:00,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-07 14:00:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-07 14:00:00,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-07 14:00:00,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:00,508 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:00,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-07 14:00:00,509 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:00,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:00,509 INFO L82 PathProgramCache]: Analyzing trace with hash -836677905, now seen corresponding path program 19 times [2020-07-07 14:00:00,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:00,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895346375] [2020-07-07 14:00:00,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:02,020 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:02,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895346375] [2020-07-07 14:00:02,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:02,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-07-07 14:00:02,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442031232] [2020-07-07 14:00:02,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-07 14:00:02,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:02,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-07 14:00:02,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1542, Unknown=0, NotChecked=0, Total=1640 [2020-07-07 14:00:02,023 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 41 states. [2020-07-07 14:00:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:04,889 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-07-07 14:00:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-07-07 14:00:04,889 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 106 [2020-07-07 14:00:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:04,891 INFO L225 Difference]: With dead ends: 120 [2020-07-07 14:00:04,891 INFO L226 Difference]: Without dead ends: 115 [2020-07-07 14:00:04,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=288, Invalid=5874, Unknown=0, NotChecked=0, Total=6162 [2020-07-07 14:00:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-07 14:00:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-07-07 14:00:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-07 14:00:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-07-07 14:00:04,901 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 106 [2020-07-07 14:00:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:04,902 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-07-07 14:00:04,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-07 14:00:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-07-07 14:00:04,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-07-07 14:00:04,903 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:04,903 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:04,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 14:00:04,903 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:04,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:04,904 INFO L82 PathProgramCache]: Analyzing trace with hash 812405823, now seen corresponding path program 20 times [2020-07-07 14:00:04,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:04,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259914233] [2020-07-07 14:00:04,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:06,225 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:06,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259914233] [2020-07-07 14:00:06,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:06,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-07-07 14:00:06,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198707014] [2020-07-07 14:00:06,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-07 14:00:06,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:06,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-07 14:00:06,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1703, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 14:00:06,227 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 43 states. [2020-07-07 14:00:09,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:09,372 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2020-07-07 14:00:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-07-07 14:00:09,375 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 111 [2020-07-07 14:00:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:09,377 INFO L225 Difference]: With dead ends: 125 [2020-07-07 14:00:09,377 INFO L226 Difference]: Without dead ends: 120 [2020-07-07 14:00:09,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=303, Invalid=6503, Unknown=0, NotChecked=0, Total=6806 [2020-07-07 14:00:09,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-07 14:00:09,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-07-07 14:00:09,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-07 14:00:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-07-07 14:00:09,386 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 111 [2020-07-07 14:00:09,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:09,387 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-07-07 14:00:09,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-07 14:00:09,387 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-07-07 14:00:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-07-07 14:00:09,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:09,388 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:09,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-07 14:00:09,388 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:09,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:09,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1782570769, now seen corresponding path program 21 times [2020-07-07 14:00:09,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:09,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248722672] [2020-07-07 14:00:09,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:10,993 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:11,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248722672] [2020-07-07 14:00:11,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:11,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-07-07 14:00:11,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450981891] [2020-07-07 14:00:11,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-07 14:00:11,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:11,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-07 14:00:11,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1872, Unknown=0, NotChecked=0, Total=1980 [2020-07-07 14:00:11,004 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 45 states. [2020-07-07 14:00:14,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:14,473 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-07-07 14:00:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-07-07 14:00:14,474 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 116 [2020-07-07 14:00:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:14,475 INFO L225 Difference]: With dead ends: 130 [2020-07-07 14:00:14,475 INFO L226 Difference]: Without dead ends: 125 [2020-07-07 14:00:14,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=318, Invalid=7164, Unknown=0, NotChecked=0, Total=7482 [2020-07-07 14:00:14,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-07 14:00:14,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-07-07 14:00:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-07 14:00:14,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2020-07-07 14:00:14,484 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 116 [2020-07-07 14:00:14,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:14,485 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2020-07-07 14:00:14,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-07 14:00:14,485 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2020-07-07 14:00:14,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-07 14:00:14,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:14,486 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:14,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-07 14:00:14,486 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:14,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:14,487 INFO L82 PathProgramCache]: Analyzing trace with hash -717176257, now seen corresponding path program 22 times [2020-07-07 14:00:14,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:14,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376878168] [2020-07-07 14:00:14,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:16,109 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:16,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376878168] [2020-07-07 14:00:16,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:16,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-07-07 14:00:16,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966481416] [2020-07-07 14:00:16,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-07 14:00:16,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:16,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-07 14:00:16,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2020-07-07 14:00:16,111 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 47 states. [2020-07-07 14:00:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:19,891 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2020-07-07 14:00:19,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-07-07 14:00:19,892 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 121 [2020-07-07 14:00:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:19,893 INFO L225 Difference]: With dead ends: 135 [2020-07-07 14:00:19,893 INFO L226 Difference]: Without dead ends: 130 [2020-07-07 14:00:19,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=333, Invalid=7857, Unknown=0, NotChecked=0, Total=8190 [2020-07-07 14:00:19,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-07-07 14:00:19,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-07-07 14:00:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-07-07 14:00:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-07-07 14:00:19,902 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 121 [2020-07-07 14:00:19,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:19,903 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-07-07 14:00:19,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-07 14:00:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-07-07 14:00:19,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-07 14:00:19,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:19,904 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:19,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-07 14:00:19,904 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:19,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:19,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1971293457, now seen corresponding path program 23 times [2020-07-07 14:00:19,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:19,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015195529] [2020-07-07 14:00:19,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:21,688 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:21,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015195529] [2020-07-07 14:00:21,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:21,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-07-07 14:00:21,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447485305] [2020-07-07 14:00:21,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-07 14:00:21,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:21,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-07 14:00:21,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2234, Unknown=0, NotChecked=0, Total=2352 [2020-07-07 14:00:21,690 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 49 states. [2020-07-07 14:00:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:25,806 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-07-07 14:00:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-07 14:00:25,807 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 126 [2020-07-07 14:00:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:25,808 INFO L225 Difference]: With dead ends: 140 [2020-07-07 14:00:25,809 INFO L226 Difference]: Without dead ends: 135 [2020-07-07 14:00:25,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=348, Invalid=8582, Unknown=0, NotChecked=0, Total=8930 [2020-07-07 14:00:25,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-07 14:00:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-07-07 14:00:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-07 14:00:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-07-07 14:00:25,817 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 126 [2020-07-07 14:00:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:25,818 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-07-07 14:00:25,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-07 14:00:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-07-07 14:00:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-07 14:00:25,819 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:25,819 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:25,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-07 14:00:25,820 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:25,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:25,820 INFO L82 PathProgramCache]: Analyzing trace with hash -974933953, now seen corresponding path program 24 times [2020-07-07 14:00:25,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:25,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745157889] [2020-07-07 14:00:25,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:27,673 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:27,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745157889] [2020-07-07 14:00:27,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:27,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-07-07 14:00:27,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916809827] [2020-07-07 14:00:27,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-07 14:00:27,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:27,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-07 14:00:27,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2427, Unknown=0, NotChecked=0, Total=2550 [2020-07-07 14:00:27,675 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 51 states. [2020-07-07 14:00:32,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:32,053 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2020-07-07 14:00:32,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-07-07 14:00:32,054 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 131 [2020-07-07 14:00:32,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:32,056 INFO L225 Difference]: With dead ends: 145 [2020-07-07 14:00:32,056 INFO L226 Difference]: Without dead ends: 140 [2020-07-07 14:00:32,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=363, Invalid=9339, Unknown=0, NotChecked=0, Total=9702 [2020-07-07 14:00:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-07 14:00:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-07-07 14:00:32,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-07 14:00:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-07-07 14:00:32,065 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 131 [2020-07-07 14:00:32,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:32,065 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-07-07 14:00:32,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-07 14:00:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-07-07 14:00:32,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-07 14:00:32,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:32,066 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:32,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-07 14:00:32,067 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:32,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:32,067 INFO L82 PathProgramCache]: Analyzing trace with hash -796769041, now seen corresponding path program 25 times [2020-07-07 14:00:32,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:32,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295588104] [2020-07-07 14:00:32,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:34,099 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:34,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295588104] [2020-07-07 14:00:34,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:34,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-07-07 14:00:34,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524609396] [2020-07-07 14:00:34,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-07 14:00:34,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:34,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-07 14:00:34,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2628, Unknown=0, NotChecked=0, Total=2756 [2020-07-07 14:00:34,101 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 53 states. [2020-07-07 14:00:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:38,832 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2020-07-07 14:00:38,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-07-07 14:00:38,833 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 136 [2020-07-07 14:00:38,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:38,835 INFO L225 Difference]: With dead ends: 150 [2020-07-07 14:00:38,835 INFO L226 Difference]: Without dead ends: 145 [2020-07-07 14:00:38,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=378, Invalid=10128, Unknown=0, NotChecked=0, Total=10506 [2020-07-07 14:00:38,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-07 14:00:38,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-07-07 14:00:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-07 14:00:38,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2020-07-07 14:00:38,844 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 136 [2020-07-07 14:00:38,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:38,844 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2020-07-07 14:00:38,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-07 14:00:38,845 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2020-07-07 14:00:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-07 14:00:38,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:38,846 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:38,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-07 14:00:38,846 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:38,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:38,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1916083775, now seen corresponding path program 26 times [2020-07-07 14:00:38,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:38,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342513232] [2020-07-07 14:00:38,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:41,009 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:41,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342513232] [2020-07-07 14:00:41,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:41,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2020-07-07 14:00:41,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927546662] [2020-07-07 14:00:41,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-07 14:00:41,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:41,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-07 14:00:41,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2837, Unknown=0, NotChecked=0, Total=2970 [2020-07-07 14:00:41,011 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 55 states. [2020-07-07 14:00:46,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:46,101 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2020-07-07 14:00:46,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-07-07 14:00:46,102 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 141 [2020-07-07 14:00:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:46,103 INFO L225 Difference]: With dead ends: 155 [2020-07-07 14:00:46,103 INFO L226 Difference]: Without dead ends: 150 [2020-07-07 14:00:46,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=393, Invalid=10949, Unknown=0, NotChecked=0, Total=11342 [2020-07-07 14:00:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-07 14:00:46,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-07-07 14:00:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-07 14:00:46,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-07-07 14:00:46,112 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 141 [2020-07-07 14:00:46,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:46,112 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-07-07 14:00:46,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-07 14:00:46,112 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-07-07 14:00:46,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-07 14:00:46,113 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:46,113 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:46,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-07 14:00:46,114 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:46,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:46,114 INFO L82 PathProgramCache]: Analyzing trace with hash -471492881, now seen corresponding path program 27 times [2020-07-07 14:00:46,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:46,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921905572] [2020-07-07 14:00:46,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:48,451 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:48,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921905572] [2020-07-07 14:00:48,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:48,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2020-07-07 14:00:48,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876170169] [2020-07-07 14:00:48,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-07 14:00:48,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:48,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-07 14:00:48,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=3054, Unknown=0, NotChecked=0, Total=3192 [2020-07-07 14:00:48,452 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 57 states. [2020-07-07 14:00:53,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:00:53,945 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2020-07-07 14:00:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-07-07 14:00:53,946 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 146 [2020-07-07 14:00:53,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:00:53,947 INFO L225 Difference]: With dead ends: 160 [2020-07-07 14:00:53,947 INFO L226 Difference]: Without dead ends: 155 [2020-07-07 14:00:53,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=408, Invalid=11802, Unknown=0, NotChecked=0, Total=12210 [2020-07-07 14:00:53,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-07 14:00:53,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-07-07 14:00:53,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-07 14:00:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2020-07-07 14:00:53,955 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 146 [2020-07-07 14:00:53,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:00:53,956 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2020-07-07 14:00:53,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-07 14:00:53,956 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2020-07-07 14:00:53,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-07 14:00:53,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:00:53,957 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:00:53,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-07 14:00:53,957 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:00:53,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:00:53,957 INFO L82 PathProgramCache]: Analyzing trace with hash -233501633, now seen corresponding path program 28 times [2020-07-07 14:00:53,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:00:53,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607020889] [2020-07-07 14:00:53,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:00:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:00:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:00:56,482 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:00:56,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607020889] [2020-07-07 14:00:56,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:00:56,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2020-07-07 14:00:56,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823773121] [2020-07-07 14:00:56,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-07-07 14:00:56,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:00:56,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-07-07 14:00:56,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3279, Unknown=0, NotChecked=0, Total=3422 [2020-07-07 14:00:56,484 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 59 states. [2020-07-07 14:01:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:02,703 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2020-07-07 14:01:02,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-07-07 14:01:02,704 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 151 [2020-07-07 14:01:02,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:02,706 INFO L225 Difference]: With dead ends: 165 [2020-07-07 14:01:02,706 INFO L226 Difference]: Without dead ends: 160 [2020-07-07 14:01:02,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=423, Invalid=12687, Unknown=0, NotChecked=0, Total=13110 [2020-07-07 14:01:02,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-07 14:01:02,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-07-07 14:01:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-07 14:01:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-07-07 14:01:02,714 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 151 [2020-07-07 14:01:02,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:02,714 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-07-07 14:01:02,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-07-07 14:01:02,715 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-07-07 14:01:02,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-07-07 14:01:02,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:02,715 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:02,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-07 14:01:02,716 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:02,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1731565329, now seen corresponding path program 29 times [2020-07-07 14:01:02,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:02,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109102851] [2020-07-07 14:01:02,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:05,649 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:05,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109102851] [2020-07-07 14:01:05,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:05,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2020-07-07 14:01:05,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152843933] [2020-07-07 14:01:05,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-07 14:01:05,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:05,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-07 14:01:05,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=3512, Unknown=0, NotChecked=0, Total=3660 [2020-07-07 14:01:05,651 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 61 states. [2020-07-07 14:01:12,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:12,328 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2020-07-07 14:01:12,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-07-07 14:01:12,330 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 156 [2020-07-07 14:01:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:12,332 INFO L225 Difference]: With dead ends: 170 [2020-07-07 14:01:12,332 INFO L226 Difference]: Without dead ends: 165 [2020-07-07 14:01:12,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=438, Invalid=13604, Unknown=0, NotChecked=0, Total=14042 [2020-07-07 14:01:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-07 14:01:12,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-07-07 14:01:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-07 14:01:12,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2020-07-07 14:01:12,342 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 156 [2020-07-07 14:01:12,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:12,342 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2020-07-07 14:01:12,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-07 14:01:12,342 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2020-07-07 14:01:12,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-07 14:01:12,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:12,343 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:12,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-07 14:01:12,344 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:12,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:12,344 INFO L82 PathProgramCache]: Analyzing trace with hash 90405439, now seen corresponding path program 30 times [2020-07-07 14:01:12,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:12,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588700106] [2020-07-07 14:01:12,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:15,640 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:15,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588700106] [2020-07-07 14:01:15,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:15,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2020-07-07 14:01:15,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436678809] [2020-07-07 14:01:15,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-07-07 14:01:15,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:15,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-07-07 14:01:15,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3753, Unknown=0, NotChecked=0, Total=3906 [2020-07-07 14:01:15,642 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 63 states. [2020-07-07 14:01:22,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:22,750 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2020-07-07 14:01:22,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-07-07 14:01:22,754 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 161 [2020-07-07 14:01:22,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:22,756 INFO L225 Difference]: With dead ends: 175 [2020-07-07 14:01:22,756 INFO L226 Difference]: Without dead ends: 170 [2020-07-07 14:01:22,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=453, Invalid=14553, Unknown=0, NotChecked=0, Total=15006 [2020-07-07 14:01:22,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-07 14:01:22,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-07-07 14:01:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-07-07 14:01:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-07-07 14:01:22,769 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 161 [2020-07-07 14:01:22,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:22,770 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-07-07 14:01:22,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-07-07 14:01:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-07-07 14:01:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-07-07 14:01:22,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:22,771 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:22,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-07-07 14:01:22,771 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:22,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:22,772 INFO L82 PathProgramCache]: Analyzing trace with hash 458275567, now seen corresponding path program 31 times [2020-07-07 14:01:22,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:22,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645114037] [2020-07-07 14:01:22,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:26,181 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:26,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645114037] [2020-07-07 14:01:26,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:26,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2020-07-07 14:01:26,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758824094] [2020-07-07 14:01:26,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-07-07 14:01:26,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:26,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-07-07 14:01:26,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=4002, Unknown=0, NotChecked=0, Total=4160 [2020-07-07 14:01:26,184 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 65 states. [2020-07-07 14:01:33,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:33,684 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2020-07-07 14:01:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-07-07 14:01:33,685 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 166 [2020-07-07 14:01:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:33,687 INFO L225 Difference]: With dead ends: 180 [2020-07-07 14:01:33,687 INFO L226 Difference]: Without dead ends: 175 [2020-07-07 14:01:33,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=468, Invalid=15534, Unknown=0, NotChecked=0, Total=16002 [2020-07-07 14:01:33,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-07 14:01:33,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-07-07 14:01:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-07 14:01:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2020-07-07 14:01:33,697 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 166 [2020-07-07 14:01:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:33,697 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2020-07-07 14:01:33,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-07-07 14:01:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2020-07-07 14:01:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-07-07 14:01:33,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:33,699 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:33,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-07-07 14:01:33,699 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:33,700 INFO L82 PathProgramCache]: Analyzing trace with hash 335571007, now seen corresponding path program 32 times [2020-07-07 14:01:33,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:33,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639234081] [2020-07-07 14:01:33,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:37,432 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:37,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639234081] [2020-07-07 14:01:37,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:37,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2020-07-07 14:01:37,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45237727] [2020-07-07 14:01:37,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-07 14:01:37,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:37,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-07 14:01:37,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=4259, Unknown=0, NotChecked=0, Total=4422 [2020-07-07 14:01:37,434 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 67 states. [2020-07-07 14:01:45,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:45,539 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2020-07-07 14:01:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-07-07 14:01:45,540 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 171 [2020-07-07 14:01:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:45,541 INFO L225 Difference]: With dead ends: 185 [2020-07-07 14:01:45,542 INFO L226 Difference]: Without dead ends: 180 [2020-07-07 14:01:45,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=483, Invalid=16547, Unknown=0, NotChecked=0, Total=17030 [2020-07-07 14:01:45,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-07-07 14:01:45,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-07-07 14:01:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-07 14:01:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-07-07 14:01:45,556 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 171 [2020-07-07 14:01:45,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:45,557 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-07-07 14:01:45,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-07 14:01:45,557 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-07-07 14:01:45,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-07-07 14:01:45,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:45,559 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:45,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-07-07 14:01:45,559 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:45,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:45,559 INFO L82 PathProgramCache]: Analyzing trace with hash -275215121, now seen corresponding path program 33 times [2020-07-07 14:01:45,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:45,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368386143] [2020-07-07 14:01:45,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:49,625 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:49,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368386143] [2020-07-07 14:01:49,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:49,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2020-07-07 14:01:49,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492708691] [2020-07-07 14:01:49,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-07 14:01:49,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:49,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-07 14:01:49,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=4524, Unknown=0, NotChecked=0, Total=4692 [2020-07-07 14:01:49,626 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 69 states. [2020-07-07 14:01:58,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:58,266 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2020-07-07 14:01:58,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-07-07 14:01:58,267 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 176 [2020-07-07 14:01:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:58,269 INFO L225 Difference]: With dead ends: 190 [2020-07-07 14:01:58,269 INFO L226 Difference]: Without dead ends: 185 [2020-07-07 14:01:58,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=498, Invalid=17592, Unknown=0, NotChecked=0, Total=18090 [2020-07-07 14:01:58,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-07-07 14:01:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-07-07 14:01:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-07-07 14:01:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2020-07-07 14:01:58,278 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 176 [2020-07-07 14:01:58,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:58,278 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2020-07-07 14:01:58,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-07 14:01:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2020-07-07 14:01:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-07-07 14:01:58,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:58,280 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:58,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-07-07 14:01:58,280 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:58,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:58,280 INFO L82 PathProgramCache]: Analyzing trace with hash 768333375, now seen corresponding path program 34 times [2020-07-07 14:01:58,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:58,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122121303] [2020-07-07 14:01:58,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:02,594 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:02,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122121303] [2020-07-07 14:02:02,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:02,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2020-07-07 14:02:02,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323589411] [2020-07-07 14:02:02,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-07-07 14:02:02,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:02,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-07-07 14:02:02,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=4797, Unknown=0, NotChecked=0, Total=4970 [2020-07-07 14:02:02,596 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 71 states. [2020-07-07 14:02:11,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:11,794 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2020-07-07 14:02:11,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-07-07 14:02:11,796 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 181 [2020-07-07 14:02:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:11,797 INFO L225 Difference]: With dead ends: 195 [2020-07-07 14:02:11,798 INFO L226 Difference]: Without dead ends: 190 [2020-07-07 14:02:11,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=513, Invalid=18669, Unknown=0, NotChecked=0, Total=19182 [2020-07-07 14:02:11,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-07 14:02:11,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-07-07 14:02:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-07 14:02:11,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-07-07 14:02:11,821 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 181 [2020-07-07 14:02:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:11,821 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-07-07 14:02:11,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-07-07 14:02:11,822 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-07-07 14:02:11,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-07 14:02:11,823 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:11,823 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:11,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-07-07 14:02:11,823 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:11,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:11,824 INFO L82 PathProgramCache]: Analyzing trace with hash -238952721, now seen corresponding path program 35 times [2020-07-07 14:02:11,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:11,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228581317] [2020-07-07 14:02:11,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:16,466 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:16,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228581317] [2020-07-07 14:02:16,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:16,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2020-07-07 14:02:16,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923125816] [2020-07-07 14:02:16,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-07-07 14:02:16,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:16,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-07-07 14:02:16,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=5078, Unknown=0, NotChecked=0, Total=5256 [2020-07-07 14:02:16,468 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 73 states. [2020-07-07 14:02:26,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:26,197 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2020-07-07 14:02:26,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-07-07 14:02:26,198 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 186 [2020-07-07 14:02:26,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:26,199 INFO L225 Difference]: With dead ends: 200 [2020-07-07 14:02:26,199 INFO L226 Difference]: Without dead ends: 195 [2020-07-07 14:02:26,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=528, Invalid=19778, Unknown=0, NotChecked=0, Total=20306 [2020-07-07 14:02:26,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-07-07 14:02:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2020-07-07 14:02:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-07 14:02:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2020-07-07 14:02:26,210 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 186 [2020-07-07 14:02:26,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:26,210 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2020-07-07 14:02:26,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-07-07 14:02:26,210 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2020-07-07 14:02:26,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-07-07 14:02:26,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:26,211 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:26,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-07-07 14:02:26,212 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:26,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:26,212 INFO L82 PathProgramCache]: Analyzing trace with hash 178635839, now seen corresponding path program 36 times [2020-07-07 14:02:26,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:26,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210592393] [2020-07-07 14:02:26,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:31,076 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:31,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210592393] [2020-07-07 14:02:31,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:31,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2020-07-07 14:02:31,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661548436] [2020-07-07 14:02:31,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-07 14:02:31,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:31,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-07 14:02:31,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=5367, Unknown=0, NotChecked=0, Total=5550 [2020-07-07 14:02:31,078 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 75 states. [2020-07-07 14:02:41,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:41,178 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2020-07-07 14:02:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-07-07 14:02:41,179 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 191 [2020-07-07 14:02:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:41,181 INFO L225 Difference]: With dead ends: 205 [2020-07-07 14:02:41,181 INFO L226 Difference]: Without dead ends: 200 [2020-07-07 14:02:41,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=543, Invalid=20919, Unknown=0, NotChecked=0, Total=21462 [2020-07-07 14:02:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-07-07 14:02:41,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-07-07 14:02:41,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-07-07 14:02:41,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2020-07-07 14:02:41,191 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 191 [2020-07-07 14:02:41,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:41,191 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2020-07-07 14:02:41,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-07 14:02:41,191 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2020-07-07 14:02:41,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-07-07 14:02:41,192 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:41,192 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:41,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-07-07 14:02:41,193 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:41,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:41,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1441575151, now seen corresponding path program 37 times [2020-07-07 14:02:41,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:41,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709151860] [2020-07-07 14:02:41,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:46,316 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:46,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709151860] [2020-07-07 14:02:46,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:46,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2020-07-07 14:02:46,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782818653] [2020-07-07 14:02:46,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-07-07 14:02:46,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:46,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-07-07 14:02:46,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=5664, Unknown=0, NotChecked=0, Total=5852 [2020-07-07 14:02:46,318 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 77 states. [2020-07-07 14:02:56,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:56,996 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2020-07-07 14:02:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-07-07 14:02:56,997 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 196 [2020-07-07 14:02:56,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:56,999 INFO L225 Difference]: With dead ends: 210 [2020-07-07 14:02:56,999 INFO L226 Difference]: Without dead ends: 205 [2020-07-07 14:02:57,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=558, Invalid=22092, Unknown=0, NotChecked=0, Total=22650 [2020-07-07 14:02:57,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-07 14:02:57,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-07-07 14:02:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-07-07 14:02:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2020-07-07 14:02:57,008 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 196 [2020-07-07 14:02:57,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:57,009 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2020-07-07 14:02:57,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-07-07 14:02:57,009 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2020-07-07 14:02:57,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-07 14:02:57,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:57,010 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:57,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-07-07 14:02:57,011 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:57,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:57,011 INFO L82 PathProgramCache]: Analyzing trace with hash 174993983, now seen corresponding path program 38 times [2020-07-07 14:02:57,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:57,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885852750] [2020-07-07 14:02:57,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:02,532 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:02,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885852750] [2020-07-07 14:03:02,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:02,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2020-07-07 14:03:02,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562038568] [2020-07-07 14:03:02,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-07-07 14:03:02,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:02,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-07-07 14:03:02,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=5969, Unknown=0, NotChecked=0, Total=6162 [2020-07-07 14:03:02,533 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 79 states. [2020-07-07 14:03:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:14,062 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2020-07-07 14:03:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-07-07 14:03:14,063 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 201 [2020-07-07 14:03:14,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:14,065 INFO L225 Difference]: With dead ends: 215 [2020-07-07 14:03:14,065 INFO L226 Difference]: Without dead ends: 210 [2020-07-07 14:03:14,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=573, Invalid=23297, Unknown=0, NotChecked=0, Total=23870 [2020-07-07 14:03:14,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-07 14:03:14,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-07-07 14:03:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-07-07 14:03:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2020-07-07 14:03:14,074 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 201 [2020-07-07 14:03:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:14,074 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2020-07-07 14:03:14,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-07-07 14:03:14,075 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2020-07-07 14:03:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-07-07 14:03:14,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:14,076 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:14,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-07-07 14:03:14,076 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:14,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:14,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1472658705, now seen corresponding path program 39 times [2020-07-07 14:03:14,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:14,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171969683] [2020-07-07 14:03:14,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:20,051 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:20,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171969683] [2020-07-07 14:03:20,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:20,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2020-07-07 14:03:20,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201040085] [2020-07-07 14:03:20,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-07-07 14:03:20,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:20,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-07-07 14:03:20,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=6282, Unknown=0, NotChecked=0, Total=6480 [2020-07-07 14:03:20,052 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 81 states. [2020-07-07 14:03:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:32,788 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2020-07-07 14:03:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-07-07 14:03:32,789 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 206 [2020-07-07 14:03:32,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:32,791 INFO L225 Difference]: With dead ends: 220 [2020-07-07 14:03:32,791 INFO L226 Difference]: Without dead ends: 215 [2020-07-07 14:03:32,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=588, Invalid=24534, Unknown=0, NotChecked=0, Total=25122 [2020-07-07 14:03:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-07 14:03:32,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-07-07 14:03:32,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-07 14:03:32,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2020-07-07 14:03:32,801 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 206 [2020-07-07 14:03:32,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:32,801 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2020-07-07 14:03:32,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-07-07 14:03:32,802 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2020-07-07 14:03:32,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-07-07 14:03:32,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:32,804 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:32,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-07-07 14:03:32,804 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:32,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:32,805 INFO L82 PathProgramCache]: Analyzing trace with hash 889528383, now seen corresponding path program 40 times [2020-07-07 14:03:32,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:32,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436996128] [2020-07-07 14:03:32,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:39,511 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:39,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436996128] [2020-07-07 14:03:39,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:39,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2020-07-07 14:03:39,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402654248] [2020-07-07 14:03:39,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-07-07 14:03:39,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:39,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-07-07 14:03:39,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=6603, Unknown=0, NotChecked=0, Total=6806 [2020-07-07 14:03:39,513 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 83 states. [2020-07-07 14:03:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:53,645 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2020-07-07 14:03:53,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-07-07 14:03:53,647 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 211 [2020-07-07 14:03:53,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:53,648 INFO L225 Difference]: With dead ends: 225 [2020-07-07 14:03:53,648 INFO L226 Difference]: Without dead ends: 220 [2020-07-07 14:03:53,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=603, Invalid=25803, Unknown=0, NotChecked=0, Total=26406 [2020-07-07 14:03:53,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-07-07 14:03:53,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-07-07 14:03:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-07-07 14:03:53,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2020-07-07 14:03:53,659 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 211 [2020-07-07 14:03:53,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:53,659 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2020-07-07 14:03:53,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-07-07 14:03:53,659 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2020-07-07 14:03:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-07-07 14:03:53,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:53,661 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:53,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-07-07 14:03:53,661 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:53,662 INFO L82 PathProgramCache]: Analyzing trace with hash -859384593, now seen corresponding path program 41 times [2020-07-07 14:03:53,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:53,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724093067] [2020-07-07 14:03:53,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:01,015 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:01,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724093067] [2020-07-07 14:04:01,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:01,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2020-07-07 14:04:01,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135412859] [2020-07-07 14:04:01,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-07-07 14:04:01,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:01,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-07-07 14:04:01,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=6932, Unknown=0, NotChecked=0, Total=7140 [2020-07-07 14:04:01,017 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 85 states. [2020-07-07 14:04:17,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:17,397 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2020-07-07 14:04:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-07-07 14:04:17,399 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 216 [2020-07-07 14:04:17,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:17,400 INFO L225 Difference]: With dead ends: 230 [2020-07-07 14:04:17,400 INFO L226 Difference]: Without dead ends: 225 [2020-07-07 14:04:17,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=618, Invalid=27104, Unknown=0, NotChecked=0, Total=27722 [2020-07-07 14:04:17,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-07-07 14:04:17,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-07-07 14:04:17,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-07-07 14:04:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2020-07-07 14:04:17,415 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 216 [2020-07-07 14:04:17,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:17,416 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2020-07-07 14:04:17,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-07-07 14:04:17,416 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2020-07-07 14:04:17,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-07-07 14:04:17,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:17,418 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:17,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-07-07 14:04:17,418 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:17,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:17,418 INFO L82 PathProgramCache]: Analyzing trace with hash 977964607, now seen corresponding path program 42 times [2020-07-07 14:04:17,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:17,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603112942] [2020-07-07 14:04:17,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:25,903 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:25,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603112942] [2020-07-07 14:04:25,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:25,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2020-07-07 14:04:25,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654000375] [2020-07-07 14:04:25,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-07-07 14:04:25,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:25,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-07-07 14:04:25,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=7269, Unknown=0, NotChecked=0, Total=7482 [2020-07-07 14:04:25,905 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand 87 states. [2020-07-07 14:04:45,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:45,570 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2020-07-07 14:04:45,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-07-07 14:04:45,572 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 221 [2020-07-07 14:04:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:45,574 INFO L225 Difference]: With dead ends: 235 [2020-07-07 14:04:45,575 INFO L226 Difference]: Without dead ends: 230 [2020-07-07 14:04:45,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=633, Invalid=28437, Unknown=0, NotChecked=0, Total=29070 [2020-07-07 14:04:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-07 14:04:45,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-07-07 14:04:45,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-07-07 14:04:45,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2020-07-07 14:04:45,586 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 221 [2020-07-07 14:04:45,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:45,586 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2020-07-07 14:04:45,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-07-07 14:04:45,586 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2020-07-07 14:04:45,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-07-07 14:04:45,588 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:45,588 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:45,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-07-07 14:04:45,588 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:45,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:45,589 INFO L82 PathProgramCache]: Analyzing trace with hash -4839697, now seen corresponding path program 43 times [2020-07-07 14:04:45,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:45,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158804837] [2020-07-07 14:04:45,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:55,424 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:55,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158804837] [2020-07-07 14:04:55,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:55,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2020-07-07 14:04:55,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071356242] [2020-07-07 14:04:55,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-07-07 14:04:55,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:55,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-07-07 14:04:55,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=7614, Unknown=0, NotChecked=0, Total=7832 [2020-07-07 14:04:55,425 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 89 states. [2020-07-07 14:05:19,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:05:19,272 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2020-07-07 14:05:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-07-07 14:05:19,274 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 226 [2020-07-07 14:05:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:05:19,277 INFO L225 Difference]: With dead ends: 240 [2020-07-07 14:05:19,277 INFO L226 Difference]: Without dead ends: 235 [2020-07-07 14:05:19,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=648, Invalid=29802, Unknown=0, NotChecked=0, Total=30450 [2020-07-07 14:05:19,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-07-07 14:05:19,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2020-07-07 14:05:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-07 14:05:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2020-07-07 14:05:19,289 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 226 [2020-07-07 14:05:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:05:19,290 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2020-07-07 14:05:19,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-07-07 14:05:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2020-07-07 14:05:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-07-07 14:05:19,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:05:19,292 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:05:19,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-07-07 14:05:19,292 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:05:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:05:19,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1914600511, now seen corresponding path program 44 times [2020-07-07 14:05:19,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:05:19,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607445852] [2020-07-07 14:05:19,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:05:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:05:31,054 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:05:31,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607445852] [2020-07-07 14:05:31,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:05:31,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2020-07-07 14:05:31,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386597019] [2020-07-07 14:05:31,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-07-07 14:05:31,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:05:31,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-07-07 14:05:31,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=7967, Unknown=0, NotChecked=0, Total=8190 [2020-07-07 14:05:31,056 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 91 states. [2020-07-07 14:06:00,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:00,623 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2020-07-07 14:06:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-07-07 14:06:00,626 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 231 [2020-07-07 14:06:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:00,628 INFO L225 Difference]: With dead ends: 245 [2020-07-07 14:06:00,628 INFO L226 Difference]: Without dead ends: 240 [2020-07-07 14:06:00,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=663, Invalid=31199, Unknown=0, NotChecked=0, Total=31862 [2020-07-07 14:06:00,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-07-07 14:06:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2020-07-07 14:06:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-07-07 14:06:00,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2020-07-07 14:06:00,643 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 231 [2020-07-07 14:06:00,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:00,644 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2020-07-07 14:06:00,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-07-07 14:06:00,644 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2020-07-07 14:06:00,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-07-07 14:06:00,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:00,646 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:00,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-07-07 14:06:00,646 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:00,646 INFO L82 PathProgramCache]: Analyzing trace with hash -718866193, now seen corresponding path program 45 times [2020-07-07 14:06:00,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:00,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479245712] [2020-07-07 14:06:00,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:06:14,323 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:14,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479245712] [2020-07-07 14:06:14,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:14,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2020-07-07 14:06:14,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276293314] [2020-07-07 14:06:14,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-07-07 14:06:14,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:14,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-07-07 14:06:14,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=8328, Unknown=0, NotChecked=0, Total=8556 [2020-07-07 14:06:14,325 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 93 states. [2020-07-07 14:06:51,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:51,358 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2020-07-07 14:06:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-07-07 14:06:51,362 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 236 [2020-07-07 14:06:51,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:51,364 INFO L225 Difference]: With dead ends: 250 [2020-07-07 14:06:51,364 INFO L226 Difference]: Without dead ends: 245 [2020-07-07 14:06:51,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=678, Invalid=32628, Unknown=0, NotChecked=0, Total=33306 [2020-07-07 14:06:51,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-07-07 14:06:51,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2020-07-07 14:06:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-07-07 14:06:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2020-07-07 14:06:51,385 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 236 [2020-07-07 14:06:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:51,385 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2020-07-07 14:06:51,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-07-07 14:06:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2020-07-07 14:06:51,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-07 14:06:51,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:51,387 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:51,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-07-07 14:06:51,388 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:51,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:51,388 INFO L82 PathProgramCache]: Analyzing trace with hash -597628353, now seen corresponding path program 46 times [2020-07-07 14:06:51,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:51,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170195482] [2020-07-07 14:06:51,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:07:07,822 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:07:07,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170195482] [2020-07-07 14:07:07,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:07:07,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2020-07-07 14:07:07,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135853446] [2020-07-07 14:07:07,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-07-07 14:07:07,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:07:07,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-07-07 14:07:07,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=8697, Unknown=0, NotChecked=0, Total=8930 [2020-07-07 14:07:07,825 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 95 states. [2020-07-07 14:07:52,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:07:52,280 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2020-07-07 14:07:52,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-07-07 14:07:52,290 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 241 [2020-07-07 14:07:52,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:07:52,296 INFO L225 Difference]: With dead ends: 255 [2020-07-07 14:07:52,296 INFO L226 Difference]: Without dead ends: 250 [2020-07-07 14:07:52,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4186 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=693, Invalid=34089, Unknown=0, NotChecked=0, Total=34782 [2020-07-07 14:07:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-07 14:07:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2020-07-07 14:07:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-07-07 14:07:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2020-07-07 14:07:52,316 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 241 [2020-07-07 14:07:52,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:07:52,316 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2020-07-07 14:07:52,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-07-07 14:07:52,317 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2020-07-07 14:07:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-07-07 14:07:52,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:07:52,319 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:07:52,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-07-07 14:07:52,319 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:07:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:07:52,320 INFO L82 PathProgramCache]: Analyzing trace with hash 960056047, now seen corresponding path program 47 times [2020-07-07 14:07:52,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:07:52,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689727485] [2020-07-07 14:07:52,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:07:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:08:12,195 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:08:12,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689727485] [2020-07-07 14:08:12,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:08:12,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2020-07-07 14:08:12,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161079742] [2020-07-07 14:08:12,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-07-07 14:08:12,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:08:12,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-07-07 14:08:12,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=9074, Unknown=0, NotChecked=0, Total=9312 [2020-07-07 14:08:12,197 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 97 states. [2020-07-07 14:09:04,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:09:04,151 INFO L93 Difference]: Finished difference Result 260 states and 260 transitions. [2020-07-07 14:09:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-07-07 14:09:04,155 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 246 [2020-07-07 14:09:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:09:04,157 INFO L225 Difference]: With dead ends: 260 [2020-07-07 14:09:04,157 INFO L226 Difference]: Without dead ends: 255 [2020-07-07 14:09:04,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=708, Invalid=35582, Unknown=0, NotChecked=0, Total=36290 [2020-07-07 14:09:04,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-07 14:09:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2020-07-07 14:09:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-07-07 14:09:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 252 transitions. [2020-07-07 14:09:04,174 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 252 transitions. Word has length 246 [2020-07-07 14:09:04,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:09:04,174 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 252 transitions. [2020-07-07 14:09:04,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-07-07 14:09:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 252 transitions. [2020-07-07 14:09:04,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-07-07 14:09:04,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:09:04,177 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:09:04,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-07-07 14:09:04,177 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:09:04,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:09:04,178 INFO L82 PathProgramCache]: Analyzing trace with hash 552720447, now seen corresponding path program 48 times [2020-07-07 14:09:04,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:09:04,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007833122] [2020-07-07 14:09:04,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:09:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:09:28,025 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:09:28,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007833122] [2020-07-07 14:09:28,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:09:28,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2020-07-07 14:09:28,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566501179] [2020-07-07 14:09:28,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-07-07 14:09:28,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:09:28,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-07-07 14:09:28,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=9459, Unknown=0, NotChecked=0, Total=9702 [2020-07-07 14:09:28,027 INFO L87 Difference]: Start difference. First operand 252 states and 252 transitions. Second operand 99 states. [2020-07-07 14:10:32,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:10:32,828 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2020-07-07 14:10:32,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2020-07-07 14:10:32,832 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 251 [2020-07-07 14:10:32,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:10:32,835 INFO L225 Difference]: With dead ends: 265 [2020-07-07 14:10:32,835 INFO L226 Difference]: Without dead ends: 260 [2020-07-07 14:10:32,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4560 ImplicationChecksByTransitivity, 44.5s TimeCoverageRelationStatistics Valid=723, Invalid=37107, Unknown=0, NotChecked=0, Total=37830 [2020-07-07 14:10:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-07 14:10:32,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2020-07-07 14:10:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-07-07 14:10:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2020-07-07 14:10:32,853 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 251 [2020-07-07 14:10:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:10:32,854 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2020-07-07 14:10:32,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-07-07 14:10:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2020-07-07 14:10:32,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-07-07 14:10:32,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:10:32,856 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:10:32,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-07-07 14:10:32,858 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:10:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:10:32,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1879907567, now seen corresponding path program 49 times [2020-07-07 14:10:32,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:10:32,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596568828] [2020-07-07 14:10:32,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:10:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:10:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:10:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:10:51,635 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:10:51,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596568828] [2020-07-07 14:10:51,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:10:51,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2020-07-07 14:10:51,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444773209] [2020-07-07 14:10:51,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-07-07 14:10:51,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:10:51,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-07-07 14:10:51,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=9852, Unknown=0, NotChecked=0, Total=10100 [2020-07-07 14:10:51,638 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 101 states. [2020-07-07 14:11:40,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:11:40,240 INFO L93 Difference]: Finished difference Result 270 states and 270 transitions. [2020-07-07 14:11:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2020-07-07 14:11:40,244 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 256 [2020-07-07 14:11:40,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:11:40,247 INFO L225 Difference]: With dead ends: 270 [2020-07-07 14:11:40,247 INFO L226 Difference]: Without dead ends: 265 [2020-07-07 14:11:40,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4753 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=738, Invalid=38664, Unknown=0, NotChecked=0, Total=39402 [2020-07-07 14:11:40,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-07-07 14:11:40,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2020-07-07 14:11:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-07-07 14:11:40,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 262 transitions. [2020-07-07 14:11:40,258 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 262 transitions. Word has length 256 [2020-07-07 14:11:40,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:11:40,259 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 262 transitions. [2020-07-07 14:11:40,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-07-07 14:11:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 262 transitions. [2020-07-07 14:11:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-07-07 14:11:40,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:11:40,261 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:11:40,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-07-07 14:11:40,261 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:11:40,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:11:40,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1884207553, now seen corresponding path program 50 times [2020-07-07 14:11:40,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:11:40,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574160091] [2020-07-07 14:11:40,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:11:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:12:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:12:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:12:00,328 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:12:00,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574160091] [2020-07-07 14:12:00,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:12:00,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2020-07-07 14:12:00,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738995615] [2020-07-07 14:12:00,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-07-07 14:12:00,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:12:00,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-07-07 14:12:00,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=10253, Unknown=0, NotChecked=0, Total=10506 [2020-07-07 14:12:00,330 INFO L87 Difference]: Start difference. First operand 262 states and 262 transitions. Second operand 103 states.