/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/locks/test_locks_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 23:17:28,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 23:17:28,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 23:17:28,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 23:17:28,762 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 23:17:28,828 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 23:17:28,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 23:17:28,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 23:17:28,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 23:17:28,833 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 23:17:28,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 23:17:28,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 23:17:28,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 23:17:28,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 23:17:28,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 23:17:28,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 23:17:28,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 23:17:28,836 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 23:17:28,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 23:17:28,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 23:17:28,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 23:17:28,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 23:17:28,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 23:17:28,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 23:17:28,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 23:17:28,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 23:17:28,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 23:17:28,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 23:17:28,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 23:17:28,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 23:17:28,839 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 23:17:29,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 23:17:29,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 23:17:29,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 23:17:29,275 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 23:17:29,280 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 23:17:29,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_12.c [2020-12-21 23:17:29,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f130512f/eaea68fbaa2642f99d6103439de0e7e9/FLAG80ee9c519 [2020-12-21 23:17:30,100 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 23:17:30,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_12.c [2020-12-21 23:17:30,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f130512f/eaea68fbaa2642f99d6103439de0e7e9/FLAG80ee9c519 [2020-12-21 23:17:30,449 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f130512f/eaea68fbaa2642f99d6103439de0e7e9 [2020-12-21 23:17:30,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 23:17:30,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 23:17:30,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 23:17:30,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 23:17:30,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 23:17:30,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:17:30" (1/1) ... [2020-12-21 23:17:30,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e935e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:30, skipping insertion in model container [2020-12-21 23:17:30,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:17:30" (1/1) ... [2020-12-21 23:17:30,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 23:17:30,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 23:17:30,678 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_12.c[4591,4604] [2020-12-21 23:17:30,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:17:30,692 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 23:17:30,722 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_12.c[4591,4604] [2020-12-21 23:17:30,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:17:30,738 INFO L208 MainTranslator]: Completed translation [2020-12-21 23:17:30,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:30 WrapperNode [2020-12-21 23:17:30,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 23:17:30,740 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 23:17:30,740 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 23:17:30,740 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 23:17:30,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:30" (1/1) ... [2020-12-21 23:17:30,755 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:30" (1/1) ... [2020-12-21 23:17:30,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 23:17:30,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 23:17:30,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 23:17:30,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 23:17:30,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:30" (1/1) ... [2020-12-21 23:17:30,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:30" (1/1) ... [2020-12-21 23:17:30,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:30" (1/1) ... [2020-12-21 23:17:30,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:30" (1/1) ... [2020-12-21 23:17:30,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:30" (1/1) ... [2020-12-21 23:17:30,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:30" (1/1) ... [2020-12-21 23:17:30,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:30" (1/1) ... [2020-12-21 23:17:30,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 23:17:30,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 23:17:30,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 23:17:30,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 23:17:30,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:30" (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 [2020-12-21 23:17:30,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 23:17:30,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 23:17:30,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 23:17:30,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 23:17:31,453 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 23:17:31,453 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-21 23:17:31,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:17:31 BoogieIcfgContainer [2020-12-21 23:17:31,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 23:17:31,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 23:17:31,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 23:17:31,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 23:17:31,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:17:30" (1/3) ... [2020-12-21 23:17:31,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408c42bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:17:31, skipping insertion in model container [2020-12-21 23:17:31,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:30" (2/3) ... [2020-12-21 23:17:31,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408c42bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:17:31, skipping insertion in model container [2020-12-21 23:17:31,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:17:31" (3/3) ... [2020-12-21 23:17:31,466 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.c [2020-12-21 23:17:31,475 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 23:17:31,481 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 23:17:31,503 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 23:17:31,534 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 23:17:31,535 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 23:17:31,535 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 23:17:31,535 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 23:17:31,535 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 23:17:31,536 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 23:17:31,536 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 23:17:31,536 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 23:17:31,569 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-12-21 23:17:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 23:17:31,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:31,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:31,584 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:31,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1341605783, now seen corresponding path program 1 times [2020-12-21 23:17:31,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:31,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6532415] [2020-12-21 23:17:31,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:31,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6532415] [2020-12-21 23:17:31,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:31,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:31,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514292028] [2020-12-21 23:17:31,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:31,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:32,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:32,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:32,022 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 3 states. [2020-12-21 23:17:32,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:32,117 INFO L93 Difference]: Finished difference Result 95 states and 169 transitions. [2020-12-21 23:17:32,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:32,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-21 23:17:32,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:32,151 INFO L225 Difference]: With dead ends: 95 [2020-12-21 23:17:32,151 INFO L226 Difference]: Without dead ends: 81 [2020-12-21 23:17:32,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-21 23:17:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 55. [2020-12-21 23:17:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-21 23:17:32,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 102 transitions. [2020-12-21 23:17:32,221 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 102 transitions. Word has length 19 [2020-12-21 23:17:32,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:32,221 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 102 transitions. [2020-12-21 23:17:32,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 102 transitions. [2020-12-21 23:17:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 23:17:32,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:32,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:32,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 23:17:32,225 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:32,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:32,230 INFO L82 PathProgramCache]: Analyzing trace with hash 61742105, now seen corresponding path program 1 times [2020-12-21 23:17:32,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:32,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750455726] [2020-12-21 23:17:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:32,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750455726] [2020-12-21 23:17:32,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:32,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:32,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103613701] [2020-12-21 23:17:32,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:32,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:32,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:32,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:32,375 INFO L87 Difference]: Start difference. First operand 55 states and 102 transitions. Second operand 3 states. [2020-12-21 23:17:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:32,422 INFO L93 Difference]: Finished difference Result 134 states and 249 transitions. [2020-12-21 23:17:32,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:32,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-21 23:17:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:32,427 INFO L225 Difference]: With dead ends: 134 [2020-12-21 23:17:32,427 INFO L226 Difference]: Without dead ends: 81 [2020-12-21 23:17:32,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-21 23:17:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-12-21 23:17:32,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 23:17:32,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 146 transitions. [2020-12-21 23:17:32,449 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 146 transitions. Word has length 19 [2020-12-21 23:17:32,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:32,449 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 146 transitions. [2020-12-21 23:17:32,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:32,450 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 146 transitions. [2020-12-21 23:17:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 23:17:32,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:32,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:32,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 23:17:32,453 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:32,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:32,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1359680987, now seen corresponding path program 1 times [2020-12-21 23:17:32,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:32,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785034524] [2020-12-21 23:17:32,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:32,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785034524] [2020-12-21 23:17:32,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:32,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:32,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065308699] [2020-12-21 23:17:32,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:32,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:32,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:32,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:32,535 INFO L87 Difference]: Start difference. First operand 79 states and 146 transitions. Second operand 3 states. [2020-12-21 23:17:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:32,556 INFO L93 Difference]: Finished difference Result 123 states and 222 transitions. [2020-12-21 23:17:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:32,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-21 23:17:32,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:32,558 INFO L225 Difference]: With dead ends: 123 [2020-12-21 23:17:32,558 INFO L226 Difference]: Without dead ends: 84 [2020-12-21 23:17:32,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:32,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-21 23:17:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-12-21 23:17:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-21 23:17:32,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 148 transitions. [2020-12-21 23:17:32,567 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 148 transitions. Word has length 20 [2020-12-21 23:17:32,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:32,568 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 148 transitions. [2020-12-21 23:17:32,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 148 transitions. [2020-12-21 23:17:32,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 23:17:32,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:32,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:32,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 23:17:32,570 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:32,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:32,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1914217955, now seen corresponding path program 1 times [2020-12-21 23:17:32,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:32,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610155531] [2020-12-21 23:17:32,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:32,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610155531] [2020-12-21 23:17:32,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:32,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:32,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443363514] [2020-12-21 23:17:32,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:32,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:32,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:32,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:32,619 INFO L87 Difference]: Start difference. First operand 82 states and 148 transitions. Second operand 3 states. [2020-12-21 23:17:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:32,639 INFO L93 Difference]: Finished difference Result 157 states and 285 transitions. [2020-12-21 23:17:32,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:32,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-21 23:17:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:32,642 INFO L225 Difference]: With dead ends: 157 [2020-12-21 23:17:32,642 INFO L226 Difference]: Without dead ends: 155 [2020-12-21 23:17:32,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:32,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-21 23:17:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2020-12-21 23:17:32,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-21 23:17:32,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 197 transitions. [2020-12-21 23:17:32,654 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 197 transitions. Word has length 20 [2020-12-21 23:17:32,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:32,655 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 197 transitions. [2020-12-21 23:17:32,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:32,655 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 197 transitions. [2020-12-21 23:17:32,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 23:17:32,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:32,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:32,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-21 23:17:32,657 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:32,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:32,658 INFO L82 PathProgramCache]: Analyzing trace with hash 634354277, now seen corresponding path program 1 times [2020-12-21 23:17:32,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:32,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682862897] [2020-12-21 23:17:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:32,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682862897] [2020-12-21 23:17:32,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:32,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:32,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245387399] [2020-12-21 23:17:32,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:32,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:32,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:32,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:32,705 INFO L87 Difference]: Start difference. First operand 109 states and 197 transitions. Second operand 3 states. [2020-12-21 23:17:32,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:32,727 INFO L93 Difference]: Finished difference Result 261 states and 475 transitions. [2020-12-21 23:17:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:32,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-21 23:17:32,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:32,730 INFO L225 Difference]: With dead ends: 261 [2020-12-21 23:17:32,730 INFO L226 Difference]: Without dead ends: 157 [2020-12-21 23:17:32,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:32,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-21 23:17:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2020-12-21 23:17:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-21 23:17:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 279 transitions. [2020-12-21 23:17:32,745 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 279 transitions. Word has length 20 [2020-12-21 23:17:32,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:32,746 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 279 transitions. [2020-12-21 23:17:32,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 279 transitions. [2020-12-21 23:17:32,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 23:17:32,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:32,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:32,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-21 23:17:32,748 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:32,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:32,749 INFO L82 PathProgramCache]: Analyzing trace with hash -788572498, now seen corresponding path program 1 times [2020-12-21 23:17:32,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:32,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405483802] [2020-12-21 23:17:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:32,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405483802] [2020-12-21 23:17:32,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:32,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:32,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53617586] [2020-12-21 23:17:32,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:32,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:32,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:32,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:32,829 INFO L87 Difference]: Start difference. First operand 155 states and 279 transitions. Second operand 3 states. [2020-12-21 23:17:32,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:32,858 INFO L93 Difference]: Finished difference Result 234 states and 418 transitions. [2020-12-21 23:17:32,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:32,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-21 23:17:32,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:32,861 INFO L225 Difference]: With dead ends: 234 [2020-12-21 23:17:32,861 INFO L226 Difference]: Without dead ends: 159 [2020-12-21 23:17:32,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:32,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-21 23:17:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-12-21 23:17:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-21 23:17:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 279 transitions. [2020-12-21 23:17:32,895 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 279 transitions. Word has length 21 [2020-12-21 23:17:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:32,896 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 279 transitions. [2020-12-21 23:17:32,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:32,900 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 279 transitions. [2020-12-21 23:17:32,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 23:17:32,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:32,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:32,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-21 23:17:32,902 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:32,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:32,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1809640852, now seen corresponding path program 1 times [2020-12-21 23:17:32,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:32,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43495877] [2020-12-21 23:17:32,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:32,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43495877] [2020-12-21 23:17:32,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:32,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:32,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815144513] [2020-12-21 23:17:32,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:32,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:32,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:32,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:32,981 INFO L87 Difference]: Start difference. First operand 157 states and 279 transitions. Second operand 3 states. [2020-12-21 23:17:33,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:33,024 INFO L93 Difference]: Finished difference Result 453 states and 809 transitions. [2020-12-21 23:17:33,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:33,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-21 23:17:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:33,028 INFO L225 Difference]: With dead ends: 453 [2020-12-21 23:17:33,028 INFO L226 Difference]: Without dead ends: 303 [2020-12-21 23:17:33,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-12-21 23:17:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 301. [2020-12-21 23:17:33,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-21 23:17:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 531 transitions. [2020-12-21 23:17:33,054 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 531 transitions. Word has length 21 [2020-12-21 23:17:33,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:33,055 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 531 transitions. [2020-12-21 23:17:33,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:33,055 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 531 transitions. [2020-12-21 23:17:33,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 23:17:33,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:33,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:33,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-21 23:17:33,061 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:33,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:33,062 INFO L82 PathProgramCache]: Analyzing trace with hash -529777174, now seen corresponding path program 1 times [2020-12-21 23:17:33,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:33,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944996403] [2020-12-21 23:17:33,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:33,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944996403] [2020-12-21 23:17:33,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:33,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:33,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125163306] [2020-12-21 23:17:33,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:33,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:33,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:33,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,135 INFO L87 Difference]: Start difference. First operand 301 states and 531 transitions. Second operand 3 states. [2020-12-21 23:17:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:33,167 INFO L93 Difference]: Finished difference Result 385 states and 685 transitions. [2020-12-21 23:17:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:33,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-21 23:17:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:33,171 INFO L225 Difference]: With dead ends: 385 [2020-12-21 23:17:33,171 INFO L226 Difference]: Without dead ends: 383 [2020-12-21 23:17:33,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-12-21 23:17:33,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 301. [2020-12-21 23:17:33,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-21 23:17:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 527 transitions. [2020-12-21 23:17:33,194 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 527 transitions. Word has length 21 [2020-12-21 23:17:33,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:33,194 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 527 transitions. [2020-12-21 23:17:33,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 527 transitions. [2020-12-21 23:17:33,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-21 23:17:33,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:33,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:33,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-21 23:17:33,201 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:33,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:33,201 INFO L82 PathProgramCache]: Analyzing trace with hash -264078182, now seen corresponding path program 1 times [2020-12-21 23:17:33,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:33,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789616691] [2020-12-21 23:17:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:33,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789616691] [2020-12-21 23:17:33,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:33,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:33,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169802536] [2020-12-21 23:17:33,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:33,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:33,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:33,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,245 INFO L87 Difference]: Start difference. First operand 301 states and 527 transitions. Second operand 3 states. [2020-12-21 23:17:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:33,279 INFO L93 Difference]: Finished difference Result 565 states and 1001 transitions. [2020-12-21 23:17:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:33,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-12-21 23:17:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:33,284 INFO L225 Difference]: With dead ends: 565 [2020-12-21 23:17:33,284 INFO L226 Difference]: Without dead ends: 563 [2020-12-21 23:17:33,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2020-12-21 23:17:33,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 417. [2020-12-21 23:17:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-12-21 23:17:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 719 transitions. [2020-12-21 23:17:33,300 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 719 transitions. Word has length 22 [2020-12-21 23:17:33,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:33,301 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 719 transitions. [2020-12-21 23:17:33,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 719 transitions. [2020-12-21 23:17:33,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-21 23:17:33,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:33,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:33,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-21 23:17:33,303 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:33,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:33,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1543941860, now seen corresponding path program 1 times [2020-12-21 23:17:33,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:33,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173963257] [2020-12-21 23:17:33,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:33,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173963257] [2020-12-21 23:17:33,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:33,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:33,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311750976] [2020-12-21 23:17:33,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:33,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:33,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:33,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,332 INFO L87 Difference]: Start difference. First operand 417 states and 719 transitions. Second operand 3 states. [2020-12-21 23:17:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:33,355 INFO L93 Difference]: Finished difference Result 997 states and 1729 transitions. [2020-12-21 23:17:33,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:33,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-12-21 23:17:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:33,360 INFO L225 Difference]: With dead ends: 997 [2020-12-21 23:17:33,360 INFO L226 Difference]: Without dead ends: 587 [2020-12-21 23:17:33,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-12-21 23:17:33,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 585. [2020-12-21 23:17:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-12-21 23:17:33,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1003 transitions. [2020-12-21 23:17:33,381 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1003 transitions. Word has length 22 [2020-12-21 23:17:33,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:33,381 INFO L481 AbstractCegarLoop]: Abstraction has 585 states and 1003 transitions. [2020-12-21 23:17:33,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:33,382 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1003 transitions. [2020-12-21 23:17:33,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 23:17:33,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:33,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:33,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-21 23:17:33,383 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:33,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:33,384 INFO L82 PathProgramCache]: Analyzing trace with hash 403724673, now seen corresponding path program 1 times [2020-12-21 23:17:33,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:33,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366150828] [2020-12-21 23:17:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:33,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366150828] [2020-12-21 23:17:33,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:33,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:33,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182378001] [2020-12-21 23:17:33,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:33,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:33,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:33,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,412 INFO L87 Difference]: Start difference. First operand 585 states and 1003 transitions. Second operand 3 states. [2020-12-21 23:17:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:33,432 INFO L93 Difference]: Finished difference Result 885 states and 1513 transitions. [2020-12-21 23:17:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:33,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-21 23:17:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:33,436 INFO L225 Difference]: With dead ends: 885 [2020-12-21 23:17:33,437 INFO L226 Difference]: Without dead ends: 599 [2020-12-21 23:17:33,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2020-12-21 23:17:33,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 597. [2020-12-21 23:17:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 597 states. [2020-12-21 23:17:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1011 transitions. [2020-12-21 23:17:33,455 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1011 transitions. Word has length 23 [2020-12-21 23:17:33,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:33,455 INFO L481 AbstractCegarLoop]: Abstraction has 597 states and 1011 transitions. [2020-12-21 23:17:33,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1011 transitions. [2020-12-21 23:17:33,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 23:17:33,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:33,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:33,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-21 23:17:33,457 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:33,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:33,458 INFO L82 PathProgramCache]: Analyzing trace with hash -617343681, now seen corresponding path program 1 times [2020-12-21 23:17:33,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:33,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437973717] [2020-12-21 23:17:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:33,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437973717] [2020-12-21 23:17:33,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:33,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:33,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975740752] [2020-12-21 23:17:33,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:33,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:33,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:33,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,483 INFO L87 Difference]: Start difference. First operand 597 states and 1011 transitions. Second operand 3 states. [2020-12-21 23:17:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:33,504 INFO L93 Difference]: Finished difference Result 1097 states and 1885 transitions. [2020-12-21 23:17:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:33,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-21 23:17:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:33,511 INFO L225 Difference]: With dead ends: 1097 [2020-12-21 23:17:33,511 INFO L226 Difference]: Without dead ends: 1095 [2020-12-21 23:17:33,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2020-12-21 23:17:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 837. [2020-12-21 23:17:33,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 837 states. [2020-12-21 23:17:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1387 transitions. [2020-12-21 23:17:33,534 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1387 transitions. Word has length 23 [2020-12-21 23:17:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:33,534 INFO L481 AbstractCegarLoop]: Abstraction has 837 states and 1387 transitions. [2020-12-21 23:17:33,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1387 transitions. [2020-12-21 23:17:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 23:17:33,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:33,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:33,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-21 23:17:33,537 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:33,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:33,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1897207359, now seen corresponding path program 1 times [2020-12-21 23:17:33,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:33,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120947977] [2020-12-21 23:17:33,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:33,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120947977] [2020-12-21 23:17:33,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:33,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:33,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723684653] [2020-12-21 23:17:33,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:33,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:33,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:33,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,561 INFO L87 Difference]: Start difference. First operand 837 states and 1387 transitions. Second operand 3 states. [2020-12-21 23:17:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:33,589 INFO L93 Difference]: Finished difference Result 1977 states and 3293 transitions. [2020-12-21 23:17:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:33,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-21 23:17:33,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:33,596 INFO L225 Difference]: With dead ends: 1977 [2020-12-21 23:17:33,597 INFO L226 Difference]: Without dead ends: 1159 [2020-12-21 23:17:33,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2020-12-21 23:17:33,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1157. [2020-12-21 23:17:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1157 states. [2020-12-21 23:17:33,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1907 transitions. [2020-12-21 23:17:33,630 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1907 transitions. Word has length 23 [2020-12-21 23:17:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:33,630 INFO L481 AbstractCegarLoop]: Abstraction has 1157 states and 1907 transitions. [2020-12-21 23:17:33,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:33,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1907 transitions. [2020-12-21 23:17:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 23:17:33,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:33,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:33,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-21 23:17:33,632 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:33,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:33,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1957570863, now seen corresponding path program 1 times [2020-12-21 23:17:33,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:33,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551321340] [2020-12-21 23:17:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:33,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551321340] [2020-12-21 23:17:33,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:33,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:33,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64230236] [2020-12-21 23:17:33,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:33,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:33,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:33,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,662 INFO L87 Difference]: Start difference. First operand 1157 states and 1907 transitions. Second operand 3 states. [2020-12-21 23:17:33,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:33,687 INFO L93 Difference]: Finished difference Result 1737 states and 2853 transitions. [2020-12-21 23:17:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:33,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-21 23:17:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:33,693 INFO L225 Difference]: With dead ends: 1737 [2020-12-21 23:17:33,694 INFO L226 Difference]: Without dead ends: 1175 [2020-12-21 23:17:33,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2020-12-21 23:17:33,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1173. [2020-12-21 23:17:33,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1173 states. [2020-12-21 23:17:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1907 transitions. [2020-12-21 23:17:33,727 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1907 transitions. Word has length 24 [2020-12-21 23:17:33,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:33,727 INFO L481 AbstractCegarLoop]: Abstraction has 1173 states and 1907 transitions. [2020-12-21 23:17:33,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:33,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1907 transitions. [2020-12-21 23:17:33,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 23:17:33,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:33,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:33,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-21 23:17:33,729 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:33,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:33,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1316328079, now seen corresponding path program 1 times [2020-12-21 23:17:33,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:33,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513017503] [2020-12-21 23:17:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:33,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513017503] [2020-12-21 23:17:33,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:33,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:33,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244646076] [2020-12-21 23:17:33,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:33,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:33,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:33,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,754 INFO L87 Difference]: Start difference. First operand 1173 states and 1907 transitions. Second operand 3 states. [2020-12-21 23:17:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:33,785 INFO L93 Difference]: Finished difference Result 2121 states and 3509 transitions. [2020-12-21 23:17:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:33,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-21 23:17:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:33,796 INFO L225 Difference]: With dead ends: 2121 [2020-12-21 23:17:33,796 INFO L226 Difference]: Without dead ends: 2119 [2020-12-21 23:17:33,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2020-12-21 23:17:33,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1669. [2020-12-21 23:17:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1669 states. [2020-12-21 23:17:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 2643 transitions. [2020-12-21 23:17:33,859 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 2643 transitions. Word has length 24 [2020-12-21 23:17:33,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:33,860 INFO L481 AbstractCegarLoop]: Abstraction has 1669 states and 2643 transitions. [2020-12-21 23:17:33,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:33,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 2643 transitions. [2020-12-21 23:17:33,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 23:17:33,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:33,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:33,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-21 23:17:33,863 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:33,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:33,863 INFO L82 PathProgramCache]: Analyzing trace with hash 36464401, now seen corresponding path program 1 times [2020-12-21 23:17:33,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:33,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112923023] [2020-12-21 23:17:33,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:33,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112923023] [2020-12-21 23:17:33,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:33,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:33,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863718029] [2020-12-21 23:17:33,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:33,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:33,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:33,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,886 INFO L87 Difference]: Start difference. First operand 1669 states and 2643 transitions. Second operand 3 states. [2020-12-21 23:17:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:33,929 INFO L93 Difference]: Finished difference Result 3913 states and 6229 transitions. [2020-12-21 23:17:33,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:33,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-21 23:17:33,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:33,941 INFO L225 Difference]: With dead ends: 3913 [2020-12-21 23:17:33,941 INFO L226 Difference]: Without dead ends: 2279 [2020-12-21 23:17:33,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2020-12-21 23:17:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2277. [2020-12-21 23:17:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2277 states. [2020-12-21 23:17:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3587 transitions. [2020-12-21 23:17:34,009 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 3587 transitions. Word has length 24 [2020-12-21 23:17:34,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:34,009 INFO L481 AbstractCegarLoop]: Abstraction has 2277 states and 3587 transitions. [2020-12-21 23:17:34,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:34,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 3587 transitions. [2020-12-21 23:17:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 23:17:34,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:34,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:34,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-21 23:17:34,013 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:34,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:34,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2143288106, now seen corresponding path program 1 times [2020-12-21 23:17:34,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:34,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347242485] [2020-12-21 23:17:34,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:34,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347242485] [2020-12-21 23:17:34,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:34,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:34,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129489626] [2020-12-21 23:17:34,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:34,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:34,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:34,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:34,058 INFO L87 Difference]: Start difference. First operand 2277 states and 3587 transitions. Second operand 3 states. [2020-12-21 23:17:34,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:34,100 INFO L93 Difference]: Finished difference Result 3417 states and 5365 transitions. [2020-12-21 23:17:34,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:34,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-21 23:17:34,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:34,112 INFO L225 Difference]: With dead ends: 3417 [2020-12-21 23:17:34,112 INFO L226 Difference]: Without dead ends: 2311 [2020-12-21 23:17:34,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2020-12-21 23:17:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 2309. [2020-12-21 23:17:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2309 states. [2020-12-21 23:17:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 3587 transitions. [2020-12-21 23:17:34,180 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 3587 transitions. Word has length 25 [2020-12-21 23:17:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:34,181 INFO L481 AbstractCegarLoop]: Abstraction has 2309 states and 3587 transitions. [2020-12-21 23:17:34,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:34,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 3587 transitions. [2020-12-21 23:17:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 23:17:34,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:34,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:34,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-21 23:17:34,184 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:34,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:34,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1130610836, now seen corresponding path program 1 times [2020-12-21 23:17:34,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:34,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960958087] [2020-12-21 23:17:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:34,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960958087] [2020-12-21 23:17:34,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:34,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:34,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984925001] [2020-12-21 23:17:34,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:34,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:34,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:34,216 INFO L87 Difference]: Start difference. First operand 2309 states and 3587 transitions. Second operand 3 states. [2020-12-21 23:17:34,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:34,270 INFO L93 Difference]: Finished difference Result 4105 states and 6501 transitions. [2020-12-21 23:17:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:34,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-21 23:17:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:34,290 INFO L225 Difference]: With dead ends: 4105 [2020-12-21 23:17:34,290 INFO L226 Difference]: Without dead ends: 4103 [2020-12-21 23:17:34,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2020-12-21 23:17:34,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 3333. [2020-12-21 23:17:34,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3333 states. [2020-12-21 23:17:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 5027 transitions. [2020-12-21 23:17:34,417 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 5027 transitions. Word has length 25 [2020-12-21 23:17:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:34,417 INFO L481 AbstractCegarLoop]: Abstraction has 3333 states and 5027 transitions. [2020-12-21 23:17:34,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 5027 transitions. [2020-12-21 23:17:34,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 23:17:34,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:34,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:34,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-21 23:17:34,422 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:34,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:34,423 INFO L82 PathProgramCache]: Analyzing trace with hash -149252842, now seen corresponding path program 1 times [2020-12-21 23:17:34,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:34,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701481940] [2020-12-21 23:17:34,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:34,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701481940] [2020-12-21 23:17:34,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:34,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:34,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018411926] [2020-12-21 23:17:34,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:34,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:34,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:34,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:34,462 INFO L87 Difference]: Start difference. First operand 3333 states and 5027 transitions. Second operand 3 states. [2020-12-21 23:17:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:34,530 INFO L93 Difference]: Finished difference Result 7753 states and 11749 transitions. [2020-12-21 23:17:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:34,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-21 23:17:34,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:34,551 INFO L225 Difference]: With dead ends: 7753 [2020-12-21 23:17:34,551 INFO L226 Difference]: Without dead ends: 4487 [2020-12-21 23:17:34,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:34,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4487 states. [2020-12-21 23:17:34,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4487 to 4485. [2020-12-21 23:17:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4485 states. [2020-12-21 23:17:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 6723 transitions. [2020-12-21 23:17:34,686 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 6723 transitions. Word has length 25 [2020-12-21 23:17:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:34,687 INFO L481 AbstractCegarLoop]: Abstraction has 4485 states and 6723 transitions. [2020-12-21 23:17:34,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 6723 transitions. [2020-12-21 23:17:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 23:17:34,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:34,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:34,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-21 23:17:34,693 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:34,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:34,694 INFO L82 PathProgramCache]: Analyzing trace with hash 689412294, now seen corresponding path program 1 times [2020-12-21 23:17:34,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:34,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080016513] [2020-12-21 23:17:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:34,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080016513] [2020-12-21 23:17:34,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:34,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:34,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995706602] [2020-12-21 23:17:34,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:34,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:34,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:34,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:34,718 INFO L87 Difference]: Start difference. First operand 4485 states and 6723 transitions. Second operand 3 states. [2020-12-21 23:17:34,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:34,812 INFO L93 Difference]: Finished difference Result 6729 states and 10053 transitions. [2020-12-21 23:17:34,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:34,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-21 23:17:34,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:34,849 INFO L225 Difference]: With dead ends: 6729 [2020-12-21 23:17:34,849 INFO L226 Difference]: Without dead ends: 4551 [2020-12-21 23:17:34,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2020-12-21 23:17:34,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 4549. [2020-12-21 23:17:34,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4549 states. [2020-12-21 23:17:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4549 states to 4549 states and 6723 transitions. [2020-12-21 23:17:35,000 INFO L78 Accepts]: Start accepts. Automaton has 4549 states and 6723 transitions. Word has length 26 [2020-12-21 23:17:35,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:35,001 INFO L481 AbstractCegarLoop]: Abstraction has 4549 states and 6723 transitions. [2020-12-21 23:17:35,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:35,001 INFO L276 IsEmpty]: Start isEmpty. Operand 4549 states and 6723 transitions. [2020-12-21 23:17:35,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 23:17:35,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:35,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:35,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-21 23:17:35,010 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:35,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:35,010 INFO L82 PathProgramCache]: Analyzing trace with hash -331656060, now seen corresponding path program 1 times [2020-12-21 23:17:35,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:35,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871482735] [2020-12-21 23:17:35,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:35,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871482735] [2020-12-21 23:17:35,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:35,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:35,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316799505] [2020-12-21 23:17:35,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:35,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:35,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:35,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:35,041 INFO L87 Difference]: Start difference. First operand 4549 states and 6723 transitions. Second operand 3 states. [2020-12-21 23:17:35,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:35,151 INFO L93 Difference]: Finished difference Result 7945 states and 11973 transitions. [2020-12-21 23:17:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:35,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-21 23:17:35,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:35,172 INFO L225 Difference]: With dead ends: 7945 [2020-12-21 23:17:35,172 INFO L226 Difference]: Without dead ends: 7943 [2020-12-21 23:17:35,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7943 states. [2020-12-21 23:17:35,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7943 to 6661. [2020-12-21 23:17:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6661 states. [2020-12-21 23:17:35,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 9539 transitions. [2020-12-21 23:17:35,429 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 9539 transitions. Word has length 26 [2020-12-21 23:17:35,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:35,429 INFO L481 AbstractCegarLoop]: Abstraction has 6661 states and 9539 transitions. [2020-12-21 23:17:35,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 9539 transitions. [2020-12-21 23:17:35,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 23:17:35,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:35,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:35,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-21 23:17:35,440 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:35,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:35,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1611519738, now seen corresponding path program 1 times [2020-12-21 23:17:35,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:35,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086145682] [2020-12-21 23:17:35,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:35,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086145682] [2020-12-21 23:17:35,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:35,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:35,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749114435] [2020-12-21 23:17:35,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:35,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:35,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:35,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:35,485 INFO L87 Difference]: Start difference. First operand 6661 states and 9539 transitions. Second operand 3 states. [2020-12-21 23:17:35,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:35,609 INFO L93 Difference]: Finished difference Result 15369 states and 22085 transitions. [2020-12-21 23:17:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:35,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-21 23:17:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:35,628 INFO L225 Difference]: With dead ends: 15369 [2020-12-21 23:17:35,629 INFO L226 Difference]: Without dead ends: 8839 [2020-12-21 23:17:35,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:35,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8839 states. [2020-12-21 23:17:35,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8839 to 8837. [2020-12-21 23:17:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8837 states. [2020-12-21 23:17:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8837 states to 8837 states and 12547 transitions. [2020-12-21 23:17:35,908 INFO L78 Accepts]: Start accepts. Automaton has 8837 states and 12547 transitions. Word has length 26 [2020-12-21 23:17:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:35,908 INFO L481 AbstractCegarLoop]: Abstraction has 8837 states and 12547 transitions. [2020-12-21 23:17:35,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 8837 states and 12547 transitions. [2020-12-21 23:17:35,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 23:17:35,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:35,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:35,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-21 23:17:35,918 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:35,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:35,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1691188181, now seen corresponding path program 1 times [2020-12-21 23:17:35,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:35,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17408939] [2020-12-21 23:17:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:35,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17408939] [2020-12-21 23:17:35,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:35,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:35,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339332020] [2020-12-21 23:17:35,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:35,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:35,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:35,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:35,964 INFO L87 Difference]: Start difference. First operand 8837 states and 12547 transitions. Second operand 3 states. [2020-12-21 23:17:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:36,080 INFO L93 Difference]: Finished difference Result 13257 states and 18757 transitions. [2020-12-21 23:17:36,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:36,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-21 23:17:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:36,099 INFO L225 Difference]: With dead ends: 13257 [2020-12-21 23:17:36,099 INFO L226 Difference]: Without dead ends: 8967 [2020-12-21 23:17:36,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:36,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8967 states. [2020-12-21 23:17:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8967 to 8965. [2020-12-21 23:17:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8965 states. [2020-12-21 23:17:36,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8965 states to 8965 states and 12547 transitions. [2020-12-21 23:17:36,425 INFO L78 Accepts]: Start accepts. Automaton has 8965 states and 12547 transitions. Word has length 27 [2020-12-21 23:17:36,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:36,425 INFO L481 AbstractCegarLoop]: Abstraction has 8965 states and 12547 transitions. [2020-12-21 23:17:36,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:36,425 INFO L276 IsEmpty]: Start isEmpty. Operand 8965 states and 12547 transitions. [2020-12-21 23:17:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 23:17:36,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:36,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:36,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-21 23:17:36,435 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:36,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1582710761, now seen corresponding path program 1 times [2020-12-21 23:17:36,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:36,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948869640] [2020-12-21 23:17:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:36,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948869640] [2020-12-21 23:17:36,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:36,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:36,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862347807] [2020-12-21 23:17:36,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:36,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:36,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:36,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:36,458 INFO L87 Difference]: Start difference. First operand 8965 states and 12547 transitions. Second operand 3 states. [2020-12-21 23:17:36,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:36,681 INFO L93 Difference]: Finished difference Result 15369 states and 21893 transitions. [2020-12-21 23:17:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:36,682 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-21 23:17:36,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:36,711 INFO L225 Difference]: With dead ends: 15369 [2020-12-21 23:17:36,712 INFO L226 Difference]: Without dead ends: 15367 [2020-12-21 23:17:36,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:36,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15367 states. [2020-12-21 23:17:37,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15367 to 13317. [2020-12-21 23:17:37,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13317 states. [2020-12-21 23:17:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13317 states to 13317 states and 18051 transitions. [2020-12-21 23:17:37,083 INFO L78 Accepts]: Start accepts. Automaton has 13317 states and 18051 transitions. Word has length 27 [2020-12-21 23:17:37,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:37,084 INFO L481 AbstractCegarLoop]: Abstraction has 13317 states and 18051 transitions. [2020-12-21 23:17:37,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand 13317 states and 18051 transitions. [2020-12-21 23:17:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 23:17:37,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:37,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:37,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-21 23:17:37,105 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:37,106 INFO L82 PathProgramCache]: Analyzing trace with hash 302847083, now seen corresponding path program 1 times [2020-12-21 23:17:37,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:37,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706832330] [2020-12-21 23:17:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:37,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706832330] [2020-12-21 23:17:37,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:37,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:37,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199972665] [2020-12-21 23:17:37,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:37,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:37,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:37,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:37,138 INFO L87 Difference]: Start difference. First operand 13317 states and 18051 transitions. Second operand 3 states. [2020-12-21 23:17:37,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:37,421 INFO L93 Difference]: Finished difference Result 30473 states and 41349 transitions. [2020-12-21 23:17:37,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:37,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-21 23:17:37,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:37,463 INFO L225 Difference]: With dead ends: 30473 [2020-12-21 23:17:37,463 INFO L226 Difference]: Without dead ends: 17415 [2020-12-21 23:17:37,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:37,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17415 states. [2020-12-21 23:17:38,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17415 to 17413. [2020-12-21 23:17:38,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17413 states. [2020-12-21 23:17:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17413 states to 17413 states and 23299 transitions. [2020-12-21 23:17:38,131 INFO L78 Accepts]: Start accepts. Automaton has 17413 states and 23299 transitions. Word has length 27 [2020-12-21 23:17:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:38,132 INFO L481 AbstractCegarLoop]: Abstraction has 17413 states and 23299 transitions. [2020-12-21 23:17:38,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:38,132 INFO L276 IsEmpty]: Start isEmpty. Operand 17413 states and 23299 transitions. [2020-12-21 23:17:38,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 23:17:38,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:38,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:38,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-21 23:17:38,151 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:38,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:38,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1819608763, now seen corresponding path program 1 times [2020-12-21 23:17:38,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:38,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324567009] [2020-12-21 23:17:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:38,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324567009] [2020-12-21 23:17:38,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:38,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:38,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699782356] [2020-12-21 23:17:38,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:38,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:38,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:38,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:38,178 INFO L87 Difference]: Start difference. First operand 17413 states and 23299 transitions. Second operand 3 states. [2020-12-21 23:17:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:38,384 INFO L93 Difference]: Finished difference Result 26121 states and 34821 transitions. [2020-12-21 23:17:38,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:38,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-21 23:17:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:38,421 INFO L225 Difference]: With dead ends: 26121 [2020-12-21 23:17:38,421 INFO L226 Difference]: Without dead ends: 17671 [2020-12-21 23:17:38,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:38,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17671 states. [2020-12-21 23:17:38,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17671 to 17669. [2020-12-21 23:17:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17669 states. [2020-12-21 23:17:38,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17669 states to 17669 states and 23299 transitions. [2020-12-21 23:17:38,935 INFO L78 Accepts]: Start accepts. Automaton has 17669 states and 23299 transitions. Word has length 28 [2020-12-21 23:17:38,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:38,935 INFO L481 AbstractCegarLoop]: Abstraction has 17669 states and 23299 transitions. [2020-12-21 23:17:38,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 17669 states and 23299 transitions. [2020-12-21 23:17:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 23:17:39,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:39,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:39,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-21 23:17:39,117 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:39,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:39,118 INFO L82 PathProgramCache]: Analyzing trace with hash 798540409, now seen corresponding path program 1 times [2020-12-21 23:17:39,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:39,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146962562] [2020-12-21 23:17:39,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:39,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146962562] [2020-12-21 23:17:39,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:39,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:39,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730990912] [2020-12-21 23:17:39,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:39,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:39,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:39,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:39,142 INFO L87 Difference]: Start difference. First operand 17669 states and 23299 transitions. Second operand 3 states. [2020-12-21 23:17:39,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:39,520 INFO L93 Difference]: Finished difference Result 29705 states and 39685 transitions. [2020-12-21 23:17:39,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:39,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-21 23:17:39,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:39,670 INFO L225 Difference]: With dead ends: 29705 [2020-12-21 23:17:39,670 INFO L226 Difference]: Without dead ends: 29703 [2020-12-21 23:17:39,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29703 states. [2020-12-21 23:17:40,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29703 to 26629. [2020-12-21 23:17:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26629 states. [2020-12-21 23:17:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26629 states to 26629 states and 34051 transitions. [2020-12-21 23:17:40,411 INFO L78 Accepts]: Start accepts. Automaton has 26629 states and 34051 transitions. Word has length 28 [2020-12-21 23:17:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:40,411 INFO L481 AbstractCegarLoop]: Abstraction has 26629 states and 34051 transitions. [2020-12-21 23:17:40,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 26629 states and 34051 transitions. [2020-12-21 23:17:40,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 23:17:40,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:40,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:40,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-21 23:17:40,446 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:40,448 INFO L82 PathProgramCache]: Analyzing trace with hash -481323269, now seen corresponding path program 1 times [2020-12-21 23:17:40,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:40,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094427890] [2020-12-21 23:17:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:40,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094427890] [2020-12-21 23:17:40,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:40,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:40,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563144721] [2020-12-21 23:17:40,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:40,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:40,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:40,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:40,474 INFO L87 Difference]: Start difference. First operand 26629 states and 34051 transitions. Second operand 3 states. [2020-12-21 23:17:41,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:41,053 INFO L93 Difference]: Finished difference Result 60425 states and 77061 transitions. [2020-12-21 23:17:41,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:41,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-21 23:17:41,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:41,123 INFO L225 Difference]: With dead ends: 60425 [2020-12-21 23:17:41,123 INFO L226 Difference]: Without dead ends: 34311 [2020-12-21 23:17:41,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:41,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34311 states. [2020-12-21 23:17:42,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34311 to 34309. [2020-12-21 23:17:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34309 states. [2020-12-21 23:17:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34309 states to 34309 states and 43011 transitions. [2020-12-21 23:17:42,282 INFO L78 Accepts]: Start accepts. Automaton has 34309 states and 43011 transitions. Word has length 28 [2020-12-21 23:17:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:42,282 INFO L481 AbstractCegarLoop]: Abstraction has 34309 states and 43011 transitions. [2020-12-21 23:17:42,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:42,283 INFO L276 IsEmpty]: Start isEmpty. Operand 34309 states and 43011 transitions. [2020-12-21 23:17:42,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 23:17:42,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:42,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:42,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-21 23:17:42,303 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:42,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:42,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1014835328, now seen corresponding path program 1 times [2020-12-21 23:17:42,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:42,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218671761] [2020-12-21 23:17:42,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:42,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218671761] [2020-12-21 23:17:42,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:42,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:42,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421799450] [2020-12-21 23:17:42,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:42,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:42,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:42,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:42,337 INFO L87 Difference]: Start difference. First operand 34309 states and 43011 transitions. Second operand 3 states. [2020-12-21 23:17:42,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:42,808 INFO L93 Difference]: Finished difference Result 51465 states and 64261 transitions. [2020-12-21 23:17:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:42,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-12-21 23:17:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:42,854 INFO L225 Difference]: With dead ends: 51465 [2020-12-21 23:17:42,854 INFO L226 Difference]: Without dead ends: 34823 [2020-12-21 23:17:42,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34823 states. [2020-12-21 23:17:43,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34823 to 34821. [2020-12-21 23:17:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34821 states. [2020-12-21 23:17:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34821 states to 34821 states and 43011 transitions. [2020-12-21 23:17:43,810 INFO L78 Accepts]: Start accepts. Automaton has 34821 states and 43011 transitions. Word has length 29 [2020-12-21 23:17:43,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:43,810 INFO L481 AbstractCegarLoop]: Abstraction has 34821 states and 43011 transitions. [2020-12-21 23:17:43,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 34821 states and 43011 transitions. [2020-12-21 23:17:43,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 23:17:43,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:43,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:43,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-21 23:17:43,830 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:43,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:43,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2035903682, now seen corresponding path program 1 times [2020-12-21 23:17:43,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:43,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974567454] [2020-12-21 23:17:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:43,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974567454] [2020-12-21 23:17:43,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:43,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:43,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165165751] [2020-12-21 23:17:43,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:43,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:43,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:43,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:43,853 INFO L87 Difference]: Start difference. First operand 34821 states and 43011 transitions. Second operand 3 states. [2020-12-21 23:17:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:44,611 INFO L93 Difference]: Finished difference Result 101385 states and 122885 transitions. [2020-12-21 23:17:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:44,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-12-21 23:17:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:44,706 INFO L225 Difference]: With dead ends: 101385 [2020-12-21 23:17:44,707 INFO L226 Difference]: Without dead ends: 67591 [2020-12-21 23:17:44,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:44,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67591 states. [2020-12-21 23:17:46,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67591 to 67589. [2020-12-21 23:17:46,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67589 states. [2020-12-21 23:17:46,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67589 states to 67589 states and 79875 transitions. [2020-12-21 23:17:46,211 INFO L78 Accepts]: Start accepts. Automaton has 67589 states and 79875 transitions. Word has length 29 [2020-12-21 23:17:46,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:46,211 INFO L481 AbstractCegarLoop]: Abstraction has 67589 states and 79875 transitions. [2020-12-21 23:17:46,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 67589 states and 79875 transitions. [2020-12-21 23:17:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 23:17:46,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:46,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:46,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-21 23:17:46,255 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:46,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:46,256 INFO L82 PathProgramCache]: Analyzing trace with hash -756040004, now seen corresponding path program 1 times [2020-12-21 23:17:46,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:46,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831435633] [2020-12-21 23:17:46,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:46,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831435633] [2020-12-21 23:17:46,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:46,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:46,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76012664] [2020-12-21 23:17:46,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:46,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:46,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:46,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:46,277 INFO L87 Difference]: Start difference. First operand 67589 states and 79875 transitions. Second operand 3 states. [2020-12-21 23:17:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:47,171 INFO L93 Difference]: Finished difference Result 71689 states and 86021 transitions. [2020-12-21 23:17:47,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:47,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-12-21 23:17:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:47,247 INFO L225 Difference]: With dead ends: 71689 [2020-12-21 23:17:47,247 INFO L226 Difference]: Without dead ends: 71687 [2020-12-21 23:17:47,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:47,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71687 states. [2020-12-21 23:17:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71687 to 67589. [2020-12-21 23:17:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67589 states. [2020-12-21 23:17:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67589 states to 67589 states and 78851 transitions. [2020-12-21 23:17:48,485 INFO L78 Accepts]: Start accepts. Automaton has 67589 states and 78851 transitions. Word has length 29 [2020-12-21 23:17:48,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:48,485 INFO L481 AbstractCegarLoop]: Abstraction has 67589 states and 78851 transitions. [2020-12-21 23:17:48,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 67589 states and 78851 transitions. [2020-12-21 23:17:48,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 23:17:48,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:48,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:48,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-21 23:17:48,527 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:48,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1311711408, now seen corresponding path program 1 times [2020-12-21 23:17:48,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:48,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024538637] [2020-12-21 23:17:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:48,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024538637] [2020-12-21 23:17:48,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:48,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:48,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155127964] [2020-12-21 23:17:48,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:48,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:48,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:48,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:48,548 INFO L87 Difference]: Start difference. First operand 67589 states and 78851 transitions. Second operand 3 states. [2020-12-21 23:17:49,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:49,712 INFO L93 Difference]: Finished difference Result 109575 states and 126980 transitions. [2020-12-21 23:17:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:49,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-21 23:17:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:49,831 INFO L225 Difference]: With dead ends: 109575 [2020-12-21 23:17:49,832 INFO L226 Difference]: Without dead ends: 109573 [2020-12-21 23:17:49,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109573 states. [2020-12-21 23:17:51,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109573 to 105477. [2020-12-21 23:17:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105477 states. [2020-12-21 23:17:51,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105477 states to 105477 states and 120835 transitions. [2020-12-21 23:17:51,763 INFO L78 Accepts]: Start accepts. Automaton has 105477 states and 120835 transitions. Word has length 30 [2020-12-21 23:17:51,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:51,764 INFO L481 AbstractCegarLoop]: Abstraction has 105477 states and 120835 transitions. [2020-12-21 23:17:51,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:51,764 INFO L276 IsEmpty]: Start isEmpty. Operand 105477 states and 120835 transitions. [2020-12-21 23:17:51,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 23:17:51,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:17:51,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:17:51,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-21 23:17:51,902 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:17:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:17:51,903 INFO L82 PathProgramCache]: Analyzing trace with hash 31847730, now seen corresponding path program 1 times [2020-12-21 23:17:51,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:17:51,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404071091] [2020-12-21 23:17:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:17:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:17:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:17:51,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404071091] [2020-12-21 23:17:51,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:17:51,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:17:51,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513414319] [2020-12-21 23:17:51,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:17:51,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:17:51,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:17:51,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:51,928 INFO L87 Difference]: Start difference. First operand 105477 states and 120835 transitions. Second operand 3 states. [2020-12-21 23:17:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:17:53,468 INFO L93 Difference]: Finished difference Result 236549 states and 268291 transitions. [2020-12-21 23:17:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:17:53,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-21 23:17:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:17:53,469 INFO L225 Difference]: With dead ends: 236549 [2020-12-21 23:17:53,469 INFO L226 Difference]: Without dead ends: 0 [2020-12-21 23:17:53,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:17:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-21 23:17:53,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-21 23:17:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-21 23:17:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-21 23:17:53,557 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2020-12-21 23:17:53,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:17:53,558 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-21 23:17:53,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:17:53,558 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-21 23:17:53,558 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-21 23:17:53,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-21 23:17:53,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-21 23:17:53,598 INFO L189 CegarLoopUtils]: For program point L184(line 184) no Hoare annotation was computed. [2020-12-21 23:17:53,598 INFO L185 CegarLoopUtils]: At program point L184-1(lines 7 193) the Hoare annotation is: false [2020-12-21 23:17:53,598 INFO L189 CegarLoopUtils]: For program point L118-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,599 INFO L189 CegarLoopUtils]: For program point L168-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,599 INFO L189 CegarLoopUtils]: For program point L102-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,599 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-21 23:17:53,599 INFO L189 CegarLoopUtils]: For program point L86-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,602 INFO L189 CegarLoopUtils]: For program point L169(line 169) no Hoare annotation was computed. [2020-12-21 23:17:53,602 INFO L189 CegarLoopUtils]: For program point L153-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,602 INFO L189 CegarLoopUtils]: For program point L154(line 154) no Hoare annotation was computed. [2020-12-21 23:17:53,602 INFO L189 CegarLoopUtils]: For program point L138-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,602 INFO L189 CegarLoopUtils]: For program point L122-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,602 INFO L189 CegarLoopUtils]: For program point L139(line 139) no Hoare annotation was computed. [2020-12-21 23:17:53,603 INFO L189 CegarLoopUtils]: For program point L106-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,603 INFO L192 CegarLoopUtils]: At program point L189(lines 7 193) the Hoare annotation is: true [2020-12-21 23:17:53,603 INFO L189 CegarLoopUtils]: For program point L90-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,603 INFO L189 CegarLoopUtils]: For program point L173-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,603 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-21 23:17:53,603 INFO L189 CegarLoopUtils]: For program point L174(line 174) no Hoare annotation was computed. [2020-12-21 23:17:53,603 INFO L189 CegarLoopUtils]: For program point L158-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,603 INFO L192 CegarLoopUtils]: At program point L192(lines 6 193) the Hoare annotation is: true [2020-12-21 23:17:53,603 INFO L189 CegarLoopUtils]: For program point L159(line 159) no Hoare annotation was computed. [2020-12-21 23:17:53,603 INFO L189 CegarLoopUtils]: For program point L143-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,603 INFO L189 CegarLoopUtils]: For program point L110-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,604 INFO L189 CegarLoopUtils]: For program point L94-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,604 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-21 23:17:53,604 INFO L189 CegarLoopUtils]: For program point L144(line 144) no Hoare annotation was computed. [2020-12-21 23:17:53,604 INFO L189 CegarLoopUtils]: For program point L78(lines 78 80) no Hoare annotation was computed. [2020-12-21 23:17:53,604 INFO L189 CegarLoopUtils]: For program point L78-2(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,604 INFO L189 CegarLoopUtils]: For program point L128-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,604 INFO L189 CegarLoopUtils]: For program point L178-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,604 INFO L189 CegarLoopUtils]: For program point L129(line 129) no Hoare annotation was computed. [2020-12-21 23:17:53,604 INFO L189 CegarLoopUtils]: For program point L179(line 179) no Hoare annotation was computed. [2020-12-21 23:17:53,604 INFO L189 CegarLoopUtils]: For program point L163-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,604 INFO L189 CegarLoopUtils]: For program point L114-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,604 INFO L189 CegarLoopUtils]: For program point L164(line 164) no Hoare annotation was computed. [2020-12-21 23:17:53,605 INFO L189 CegarLoopUtils]: For program point L98-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,605 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-21 23:17:53,605 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 191) no Hoare annotation was computed. [2020-12-21 23:17:53,605 INFO L189 CegarLoopUtils]: For program point L148-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,608 INFO L189 CegarLoopUtils]: For program point L49(lines 49 51) no Hoare annotation was computed. [2020-12-21 23:17:53,608 INFO L189 CegarLoopUtils]: For program point L82-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,608 INFO L189 CegarLoopUtils]: For program point L149(line 149) no Hoare annotation was computed. [2020-12-21 23:17:53,608 INFO L189 CegarLoopUtils]: For program point L133-1(lines 47 188) no Hoare annotation was computed. [2020-12-21 23:17:53,608 INFO L192 CegarLoopUtils]: At program point L183-1(lines 47 188) the Hoare annotation is: true [2020-12-21 23:17:53,608 INFO L189 CegarLoopUtils]: For program point L134(line 134) no Hoare annotation was computed. [2020-12-21 23:17:53,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:17:53 BoogieIcfgContainer [2020-12-21 23:17:53,631 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-21 23:17:53,631 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-21 23:17:53,631 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-21 23:17:53,635 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-21 23:17:53,636 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:17:31" (3/4) ... [2020-12-21 23:17:53,639 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-21 23:17:53,655 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-21 23:17:53,655 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-21 23:17:53,655 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-21 23:17:53,656 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-21 23:17:53,746 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/locks/test_locks_12.c-witness.graphml [2020-12-21 23:17:53,747 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-21 23:17:53,749 INFO L168 Benchmark]: Toolchain (without parser) took 23293.82 ms. Allocated memory was 172.0 MB in the beginning and 7.0 GB in the end (delta: 6.8 GB). Free memory was 148.0 MB in the beginning and 5.5 GB in the end (delta: -5.4 GB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. [2020-12-21 23:17:53,749 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 172.0 MB. Free memory is still 147.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-21 23:17:53,750 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.44 ms. Allocated memory is still 172.0 MB. Free memory was 147.9 MB in the beginning and 137.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-21 23:17:53,750 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.88 ms. Allocated memory is still 172.0 MB. Free memory was 137.2 MB in the beginning and 135.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-21 23:17:53,751 INFO L168 Benchmark]: Boogie Preprocessor took 30.96 ms. Allocated memory is still 172.0 MB. Free memory was 135.4 MB in the beginning and 134.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-21 23:17:53,751 INFO L168 Benchmark]: RCFGBuilder took 640.26 ms. Allocated memory is still 172.0 MB. Free memory was 134.1 MB in the beginning and 148.1 MB in the end (delta: -14.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 8.0 GB. [2020-12-21 23:17:53,751 INFO L168 Benchmark]: TraceAbstraction took 22172.82 ms. Allocated memory was 172.0 MB in the beginning and 7.0 GB in the end (delta: 6.8 GB). Free memory was 147.6 MB in the beginning and 5.5 GB in the end (delta: -5.4 GB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. [2020-12-21 23:17:53,752 INFO L168 Benchmark]: Witness Printer took 115.58 ms. Allocated memory is still 7.0 GB. Free memory was 5.5 GB in the beginning and 5.5 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-21 23:17:53,754 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 172.0 MB. Free memory is still 147.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 281.44 ms. Allocated memory is still 172.0 MB. Free memory was 147.9 MB in the beginning and 137.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.88 ms. Allocated memory is still 172.0 MB. Free memory was 137.2 MB in the beginning and 135.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.96 ms. Allocated memory is still 172.0 MB. Free memory was 135.4 MB in the beginning and 134.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 640.26 ms. Allocated memory is still 172.0 MB. Free memory was 134.1 MB in the beginning and 148.1 MB in the end (delta: -14.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 22172.82 ms. Allocated memory was 172.0 MB in the beginning and 7.0 GB in the end (delta: 6.8 GB). Free memory was 147.6 MB in the beginning and 5.5 GB in the end (delta: -5.4 GB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. * Witness Printer took 115.58 ms. Allocated memory is still 7.0 GB. Free memory was 5.5 GB in the beginning and 5.5 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 191]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.0s, OverallIterations: 33, TraceHistogramMax: 1, AutomataDifference: 8.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3231 SDtfs, 1629 SDslu, 2174 SDs, 0 SdLazy, 175 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105477occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 10.6s AutomataMinimizationTime, 33 MinimizatonAttempts, 16418 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 4105 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 811 NumberOfCodeBlocks, 811 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 778 ConstructedInterpolants, 0 QuantifiedInterpolants, 40508 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 33 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...